阅读说明：本技术 一种高效率滤波天线阵列及通信设备 (High-efficiency filter antenna array and communication equipment ) 是由 冯文杰 程俊淇 施永荣 倪啸宇 伍文斌 车文荃 薛泉 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种高效率滤波天线阵列及通信设备,包括至少一个天线阵列,每个天线阵列包括上中下三层,上层设置辐射层,中间层设置脊间隙波导馈电网络层及下层设置脊间隙波导滤波馈电网络层。本发明将滤波结构与馈电网络结合,实现了紧凑的滤波馈电网络形式,整个天线阵列体积小,集成度高,馈电网络实现了带通滤波特性,在通带内实现了高天线增益和辐射效率。(The invention discloses a high-efficiency filter antenna array and communication equipment, which comprise at least one antenna array, wherein each antenna array comprises an upper layer, a middle layer and a lower layer, the upper layer is provided with a radiation layer, the middle layer is provided with a ridge gap waveguide feed network layer, and the lower layer is provided with a ridge gap waveguide filter feed network layer. The invention combines the filter structure with the feed network, realizes a compact filter feed network form, has small volume of the whole antenna array and high integration level, realizes the band-pass filter characteristic of the feed network, and realizes high antenna gain and radiation efficiency in the pass band.)

1. A high efficiency filter antenna array comprising at least one antenna array, said antenna array comprising three layers:

the upper layer is provided with a radiation layer and comprises a dielectric substrate, the upper surface of the dielectric substrate is provided with N antenna units which are arranged in an array manner, each antenna unit comprises 2 multiplied by 2 rectangular microstrip patches, microstrip lines with a one-to-four structure are respectively connected with the four rectangular microstrip patches to carry out constant-amplitude in-phase feeding, the lower surface of the dielectric substrate is provided with a metal floor, and the metal floor is provided with N metal through holes;

the middle layer is provided with a ridge gap waveguide feed network layer which comprises a metal top plate, metal probes and short metal ridges, wherein the number of the metal probes is the same as that of the antenna units, the short metal ridges are arranged on the upper surface of the metal top plate, and the short metal ridges penetrate through metal through holes through the metal probes arranged above the short metal ridges and are connected with a microstrip line with a one-to-four structure;

the lower layer is provided with a ridge gap waveguide filter feed network layer which comprises a metal bottom plate with a WR-22 waveguide port, a rectangular coupling hole, a first rectangular groove and a second rectangular groove, wherein the rectangular coupling hole, the first rectangular groove and the second rectangular groove are formed in the lower surface of a metal top plate, an adjusting pin is arranged in the second rectangular groove to form a band-pass filter, metal ridges are symmetrically arranged on two sides of the second rectangular groove and are converted to obtain a T-shaped power division junction, the tail end of the T-shaped power division junction is connected with a horizontal step metal ridge, electromagnetic wave energy is coupled to the tail end of the horizontal step metal ridge from the WR-22 waveguide port through a vertical step metal ridge conversion structure, the horizontal step metal ridge is located under the rectangular coupling hole, then two paths of electromagnetic waves with equal amplitude and opposite phase are coupled to a short metal ridge through the rectangular coupling hole, and the two paths of electromagnetic waves are further coupled to a microstrip line with a one-to-four structure.

2. The high efficiency filter antenna array of claim 1, wherein the vertical step metal ridge transition structure comprises a transition metal ridge, a transition metal ridge and a vertical step metal ridge, the vertical step metal ridge and the WR-22 waveguide port are disposed in the groove of the metal base plate, the electromagnetic wave is coupled from the WR-22 waveguide port to the vertical step metal ridge, the transition is performed from the end of the vertical step metal ridge to the front end of the transition metal ridge, and then the electromagnetic wave is coupled to the first rectangular groove through the transition metal ridge at the end of the transition metal ridge, so that the transition of the electromagnetic wave from the metal base plate to the metal top plate is achieved.

3. The high efficiency filter antenna array of claim 1, wherein the metal top plate is provided with metal pins arranged periodically, the metal pins divide the metal top plate into four rectangular areas, and a rectangular coupling hole is provided at the center of each rectangular area.

4. The high efficiency filtered antenna array as in any one of claims 1-3, wherein the second rectangular slot has three pairs of adjustment pins located at the front, middle and rear ends of the second rectangular slot, wherein the height of the adjustment pins is equal to the depth of the second rectangular slot, and the depth of the second rectangular slot is less than the depth of the first rectangular slot.

5. The high efficiency filtered antenna array of claim 2, wherein the rectangular coupling aperture, the first and second rectangular slots, the metal ridge and the transition metal ridge are surrounded by a metal pin.

6. The high efficiency filtered antenna array of claim 2, wherein the vertical step metal ridges have a greater width at their ends than at their front ends, and wherein the vertical step metal ridges have front ends that are stepped at different heights.

7. The high-efficiency filter antenna array of claim 1, wherein the number of the metal ridges is two, the number of the T-shaped power splitting junctions is two, the two T-shaped power splitting junctions are respectively connected with four horizontal step metal ridges, the tail ends of the horizontal step metal ridges are located right below the rectangular coupling hole, the four horizontal step metal ridges are symmetrically distributed about a central axis of the second rectangular groove, and the horizontal step metal ridges are formed by splicing metal ridges with different widths.

8. The high efficiency filter antenna array of claim 5, wherein the metal pins surrounding the short metal ridges are below the height of the short metal ridges and there is an air gap of 0.15-0.25mm between the metal pins and the metal floor.

9. The high efficiency filter antenna array as recited in claim 2, wherein the transition metal ridge is formed by the end of the transition metal ridge extending into the first rectangular slot, the transition metal ridge having a width greater at the front end than at the back end.

10. A communication device comprising a high efficiency filtered antenna array as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to a millimeter wave integrated antenna array, in particular to a high-efficiency filter antenna array and communication equipment.

Background

With the rapid development of communication systems, people are increasingly demanding high-performance, miniaturized, and integrated devices. As a transceiver module of a communication system, high gain miniaturization has been a focus of attention. Filters are also indispensable components in communication devices. Integrating the filter and antenna array together allows the size of the communication device to be reduced. In recent years, the gap waveguide technology has attracted much attention because of its good transmission performance, low insertion loss and simple fabrication and assembly. Feed networks based on gap waveguide technology are widely used in the design of antenna arrays.

In document 1 (A. Vosoogh, M.S. Sorkherizi, A.U. Zaman, J. Yang and A.A. Kishk, "An Integrated Ka-Band divider-Antenna Array Module Based on Gap Waveguide Technology With Simple Mechanical measurements," in IEEE Trans. micro. volume Technology, 962. 66, No. 2, pp. 962-972, Feb. 2018.), Gap Waveguide Technology was first proposed by the teaching of P.S. Kildal, including ridge Gap Waveguide, slot Gap Waveguide and microstrip Gap Waveguide Technology. The ridge gap waveguide technology can propagate TEM modes, so that the application range is wider. The ridge gap waveguide comprises an upper layer of metal plate and a lower layer of metal plate which are parallel to each other, wherein one metal plate is smooth in surface, the other metal plate is provided with metal ridge lines and metal pins surrounding the metal ridge lines, and the metal plates with smooth surfaces are arranged above the metal ridge lines and the metal pins and are spaced by air gaps. The electromagnetic wave is transmitted in the air gap, the transmission loss is reduced, and the electromagnetic wave transmission device is simple to process and convenient to assemble due to the fact that good electric contact is not needed.

Since the conventional waveguide filter is bulky, difficult to process and not easy to integrate, a filter based on the slot gap waveguide technology has been studied, for example, in document 2 (Rezaee, m., a.u. Zaman, and p.s. Kildal, "a groove gap waveguide interference filter for V-band application," 201523 rd Iranian reference on Electrical Engineering (ICEE) IEEE, 2015.) it is said that the slot gap waveguide can propagate TE₁₀The mode, which is the same as the propagation mode of the rectangular waveguide, can be used for the design of the filter structure instead of the conventional rectangular waveguide.

Disclosure of Invention

In order to overcome the defects and shortcomings of the prior art, the invention mainly aims to provide a high-efficiency filter antenna array, which specifically adopts a millimeter low-loss feed network of ridge gap waveguides to reduce transmission loss, and cascades a power division filter network based on slot gap waveguides and the ridge gap waveguide feed network to reduce the overall size of the filter antenna array; the upper layer feed network structure and the lower layer feed network structure are adopted, so that a complex single-layer feed network is avoided, the plane size of the antenna array is reduced, and the radiation efficiency of the antenna array is improved.

It is another object of the present invention to provide a communication device.

The invention adopts the following technical scheme:

a high efficiency filtering antenna array comprising at least one antenna array comprising three layers, upper, middle and lower:

the upper layer is provided with a radiation layer and comprises a dielectric substrate, the upper surface of the dielectric substrate is provided with N antenna units which are arranged in an array manner, each antenna unit comprises 2 multiplied by 2 rectangular microstrip patches, microstrip lines with a one-to-four structure are respectively connected with the four rectangular microstrip patches to carry out constant-amplitude in-phase feeding, the lower surface of the dielectric substrate is provided with a metal floor, and the metal floor is provided with N metal through holes;

the middle layer is provided with a ridge gap waveguide feed network layer which comprises a metal top plate, metal probes and short metal ridges, wherein the number of the metal probes is the same as that of the antenna units, the short metal ridges are arranged on the upper surface of the metal top plate, and the short metal ridges penetrate through the metal probes arranged above the metal top plate and are connected with a microstrip line with a one-to-four structure;

the lower layer is provided with a ridge gap waveguide filter feed network layer which comprises a metal bottom plate with a WR-22 waveguide port, a rectangular coupling hole, a first rectangular groove and a second rectangular groove, wherein the rectangular coupling hole, the first rectangular groove and the second rectangular groove are formed in the lower surface of a metal top plate, an adjusting pin is arranged in the second rectangular groove to form a band-pass filter, metal ridges are symmetrically arranged on two sides of the second rectangular groove and are converted to obtain a T-shaped power division junction, the tail end of the T-shaped power division junction is connected with a horizontal step metal ridge, electromagnetic wave energy is coupled to the tail end of the horizontal step metal ridge from the WR-22 waveguide port through a vertical step metal ridge conversion structure, the horizontal step metal ridge is located under the rectangular coupling hole, two paths of electromagnetic waves with equal amplitude and opposite phase are coupled to four short metal ridges through the rectangular coupling hole, and the two paths of electromagnetic waves are further coupled to a microstrip line with a divide-four structure.

Furthermore, the vertical step metal ridge conversion structure comprises a conversion metal ridge, a transition metal ridge and a vertical step metal ridge, wherein the vertical step metal ridge and a WR-22 waveguide port are arranged in a groove of the metal bottom plate, electromagnetic waves are coupled to the vertical step metal ridge from the WR-22 waveguide port, the tail end of the vertical step metal ridge is transited to the front end of the conversion metal ridge, then the electromagnetic waves are coupled to the first rectangular groove through the transition metal ridge at the tail end of the conversion metal ridge, and the transition of the electromagnetic waves from the metal bottom plate to the metal top plate is realized.

Further, the metal top plate is provided with metal pins which are periodically arranged, the metal pins divide the metal top plate into four rectangular areas, and the center of each rectangular area is provided with a rectangular coupling hole.

Furthermore, the second rectangular groove sets up three pairs of adjusting pin, is located front end, middle and the rear end of second rectangular groove respectively, adjusting pin's height equals with the degree of depth of second rectangular groove, the degree of depth of second rectangular groove is less than first rectangular groove.

Further, the peripheries of the rectangular coupling hole, the first and second rectangular grooves, the metal ridge and the transition metal ridge are surrounded by the metal pin.

Furthermore, the width of the tail end of the vertical step metal ridge is larger than that of the front end of the vertical step metal ridge, and the front end of the vertical step metal ridge is in a step shape with different heights.

Furthermore, the tail ends of the horizontal stepped metal ridges are located right below the rectangular coupling hole, the four horizontal stepped metal ridges are symmetrically distributed about the central axis of the second rectangular groove, and the horizontal stepped metal ridges are formed by splicing metal ridges with different widths.

Further, the metal pins surrounding the short metal ridges are lower than the short metal ridges in height, and an air gap of 0.15-0.25mm exists between the metal pins and the metal floor.

Furthermore, the tail end of the transition metal ridge extends into the first rectangular groove to form a transition metal ridge, and the width of the front end of the transition metal ridge is larger than that of the rear end of the transition metal ridge.

A communication device comprises the high-efficiency filter antenna array.

The transmission process of the electromagnetic wave energy of the antenna array is as follows:

the antenna array is fed through a WR-22 waveguide port on the metal bottom plate, energy is coupled into the ridge gap waveguide from the WR-22 waveguide port through a vertical step metal ridge of the WR-22 waveguide port and the ridge gap waveguide, then the energy of the metal bottom plate metal ridge is coupled to the metal ridge on the lower surface of the metal top plate through the metal ridge, and metal pins distributed in a dispersed mode surround the metal ridge to prevent electromagnetic wave leakage. The transition metal ridge on the lower surface of the metal top plate is coupled into the front end of the first rectangular groove to form a transition metal ridge, the electromagnetic wave passes through the transition metal ridge, and the propagation mode of the electromagnetic wave is converted from the TEM mode to the TE mode₁₀And (5) molding. And three pairs of periodic adjusting pins are arranged in the second rectangular groove to form a filtering structure, and the second rectangular groove and the three pairs of adjusting pins form a 34-36GHz band-pass filter. Two metal ridges are symmetrically distributed on two sides of the tail end of the second rectangular groove, and electromagnetic waves pass through TE in the second rectangular groove₁₀The mode is again converted to TEM mode. The two metal ridges form two T-shaped power dividing junctions through size conversion and branching, and the T-shaped power dividing junctions divide energy into two paths with equal amplitude and same phase. The tail ends of the four paths of metal ridges are connected with four horizontal step metal ridges, and the horizontal step metal ridges are connected with four horizontal step metal ridgesThe ridge is located right below the rectangular coupling hole, and electromagnetic wave energy is coupled to the upper surface of the metal top plate, namely the feed network of the middle layer through the rectangular coupling hole at the tail end of the horizontal step metal ridge.

In the middle layer feed network, the metal pin divides the upper surface of the metal top plate into four parts which are symmetrically distributed, each rectangular coupling hole is positioned in the center of each part, the amplitude and the phase of electromagnetic waves in the four rectangular coupling holes are the same, the electromagnetic waves are transmitted from the wide side of the rectangular coupling holes to the two sides to form two paths of electromagnetic waves with equal amplitude and opposite phase, the electromagnetic waves are coupled to the four short metal ridges, the energy phase and the amplitude of the two short metal ridges on the same side of the two sides of the wide side are the same, and the amplitude and the phase of the short metal ridges on different sides are the same. At the tail ends of the 16 short metal ridges, electromagnetic waves pass through the metal probes above the tail ends of the metal ridges, the metal probes penetrate through the metal through holes of the metal floor and the dielectric substrate to couple energy to the microstrip lines, the energy and the size of the electromagnetic waves on the four rectangular microstrip patches are the same through a one-to-four microstrip power divider with the same amplitude and the same phase, but the amplitude and the phase of the electromagnetic waves at the tail ends of the short metal ridges at different positions are the same and are opposite, wherein the phase of the electromagnetic waves at the tail ends of the eight short metal ridges is opposite to that of the electromagnetic waves at the other eight short metal ridges, and therefore the amplitude and the phase of the electromagnetic waves on all the rectangular microstrip patches are the same by adjusting the directions of the eight microstrip lines, namely rotating 180 degrees. The whole antenna array comprises 64 rectangular microstrip patches, four rectangular microstrip patches connected by microstrip lines and the microstrip lines connected with the four rectangular microstrip patches form a 2 x 2 antenna sub-array, 16 2 x 2 antenna sub-arrays are fed by 16 metal probes positioned at the tail ends of the short metal ridges, and the whole antenna array is fed through a WR-22 waveguide port at the bottom.

The invention has the beneficial effects that:

(1) the lower feed network of the antenna array adopts the ridge gap waveguide technology, so that the transmission loss is reduced, and the feed network is cascaded with the filter network, so that the feed network has a compact structure and filter performance;

(2) in the invention, the middle layer adopts a one-to-four feed network of ridge gap waveguides, and metal probes are distributed above the tail ends of the short metal ridges to feed the antenna units on the upper layer, thereby reducing the complexity of the feed network and reducing the plane area of the antenna array;

(3) the upper layer of the antenna adopts the rectangular microstrip patch as the basic radiating unit of the antenna, so that the section size and the weight of the antenna array are reduced, the passband range of the whole antenna array is 34-36GHz, the out-of-band rejection performance is good, the gain of the antenna array reaches 25dBi and the peak gain is 25.4dBi within the passband range, and the radiation efficiency is more than 80 percent.

Drawings

Fig. 1 is a schematic structural diagram of a high efficiency filter antenna array according to the present invention;

FIG. 2 is a schematic structural diagram of 2 × 2 rectangular microstrip patches of the present invention;

FIG. 3 is a schematic structural diagram of a ridge gap waveguide feed network layer of an intermediate layer of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic structural diagram of a ridge-gap waveguide feed network layer of the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a side view of FIG. 1;

FIG. 8 is a graph of reflection parameters and gain for example 1 of the present invention;

FIG. 9 is the E-plane main polarization pattern at 35GHz according to example 1 of the present invention;

FIG. 10 is an E-plane cross-polarization pattern at 35GHz for example 1 of the present invention;

FIG. 11 is the H-plane main polarization pattern at 35GHz according to example 1 of the present invention;

fig. 12 is an H-plane cross-polarization pattern at 35GHz for example 1 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

Example 1

As shown in fig. 1 to 6, a high-efficiency filter antenna array is a millimeter-wave high-gain filter microstrip antenna array based on ridge gap waveguide, and includes at least one antenna array, each antenna array includes a radiation layer and two feed network layers, and the specific structure is as follows:

the uppermost layer is a radiation layer and comprises a dielectric substrate 3, the upper surface of the dielectric substrate is provided with N antenna units arranged in an array manner, in this embodiment, the antenna unit comprises 2 × 8 antenna units, each antenna unit comprises 2 × 2 rectangular microstrip patches 1, the four rectangular microstrip patches are respectively connected with a microstrip line with a one-to-four structure to form an antenna subarray, and the microstrip line is fed by the four rectangular microstrip patches in an equal-amplitude and same-phase manner. The lower surface of the dielectric substrate is provided with a metal floor 4, the metal floor 4 is provided with metal through holes 5 which are equal to the number of the antenna units and are arranged periodically, the metal through holes 5 correspond to the antenna units one by one, and the metal through holes 5 are 16 metal through holes with equal sizes.

The middle layer is provided with a ridge gap waveguide feed network layer which comprises a metal top plate 11, the upper surface of the metal top plate is provided with 16 short metal ridges 7 with the number equal to that of the antenna units, 16 metal probes 6 with the number equal to that of the antenna units are arranged above the short metal ridges, the metal probes 6 penetrate through metal through holes 5 to be connected with a microstrip line with a one-to-four structure, metal pins 8 are uniformly arranged around each short metal ridge, the short metal ridges 7 and the metal pins are arranged on the upper surface of the metal top plate 11, and feeding is carried out in a probe mode, so that the ridge gap waveguide feed network is combined with the microstrip antenna.

In order to realize better matching, the height of the short metal ridge is lower than that of the metal pin, and an air gap of 0.15-0.25mm exists between the metal pin 8 and the metal floor 4.

The lowest layer is provided with a ridge gap waveguide feed network layer which comprises a first rectangular groove 10-1, a second rectangular groove 10-2 and four rectangular coupling holes 9, wherein the first rectangular groove, the second rectangular groove and the four rectangular coupling holes are processed on the lower surface of a metal top plate 11, the four rectangular coupling holes 9 penetrate through the metal top plate 11, the first rectangular groove and the second rectangular groove are connected in an end-to-end mode, and the four rectangular coupling holes are symmetrically distributed by using the central axes of the two rectangular grooves. Four short metal ridges are distributed around each rectangular coupling hole, and the four short metal ridges are symmetrically distributed around the center of each rectangular coupling hole.

Furthermore, the four rectangular coupling holes are equal in size and equal in spacing distance, the metal pins arranged periodically divide the upper surface of the metal top plate into four rectangular areas, and the four rectangular coupling holes are respectively located in the center positions of the four rectangular areas. Since the depth affects the impedance value, in order to achieve the optimum impedance matching, the depth of the first rectangular groove is greater than that of the second rectangular groove, but is smaller than the thickness of the metal top plate.

In order to form a 34-36GHz band-pass filter, three pairs of adjusting pins are periodically arranged in the second rectangular groove to form a filtering structure, and the filtering structure is distributed at the front end, the middle end and the tail end in the second rectangular groove. The height of the adjusting pin is equal to the depth of the second rectangular groove, the two adjusting pin are a group of inner walls tightly attached to the second rectangular groove, and the spacing distance is equal.

The lower surface of the metal top plate 11 is provided with two metal ridges 13 which are symmetrically arranged at two sides of the second rectangular groove 10-2 and are specifically arranged at the tail ends, the metal ridges form T-shaped power division junctions 14 through size conversion and branching, metal pins are arranged around the metal ridges, the feed network comprises two T-shaped power division junctions 14, the two metal ridges 13 are divided into 4 paths, the tail ends of the T-shaped power division junctions are connected with a horizontal step metal ridge 15, the horizontal step metal ridge 15 is positioned right below the rectangular coupling hole 9, a conversion metal ridge 16 is processed on the lower surface of the metal top plate 11, the tail ends of the conversion metal ridges 16 extend into the first rectangular groove to form transition metal ridges 22, the front ends of the conversion metal ridges 16 are aligned up and down with the tail ends of the vertical step metal ridges 17, the front ends of the vertical step metal ridges 17 are positioned right above the WR-22 waveguide ports 18, the vertical step metal ridges 17 and the WR-22 waveguide ports 18 are all processed in grooves 20 on the metal bottom plate 19 The metal cover plate 21 connected with the front end of the conversion metal ridge 16 is arranged right above the front end of the vertical step metal ridge 17, and the metal cover plate 21 is tightly attached to the lower surface of the metal top plate 11.

The specific working process of the antenna is as follows:

the whole antenna array is fed through a WR-22 waveguide port 18 on the lower surface of a metal bottom plate 19, electromagnetic waves are coupled to a vertical step metal ridge 17 from the WR-22 waveguide port 18, the transition from the tail end of the vertical step metal ridge 17 to the front end of a conversion metal ridge 16 is realized, the transition from the metal bottom plate 19 to a metal top plate 11 is realized, the electromagnetic waves are coupled into a first rectangular groove 10-1 through the transition metal ridge 22 on the tail end of the conversion metal ridge 16, the depths of the first rectangular groove 10-1 and a second rectangular groove 10-2 are not consistent, three pairs of adjusting pins 12 in the second rectangular groove can carry out band-pass filtering on the electromagnetic waves to form a 34-36GHz pass band, the electromagnetic waves are coupled onto two symmetrical metal ridges 13 on the tail end of the second rectangular groove, the electromagnetic waves are divided into four paths through two T-shaped power dividing junctions 14, the electromagnetic waves are coupled into a rectangular coupling hole 9 on a horizontal step metal ridge 15 on the tail end of the four paths of the metal ridge, on the upper surface of the metal top plate 11, the metal pins 8 which are periodically arranged divide the upper surface of the metal top plate into four rectangular areas with the same size, the four rectangular coupling holes 9 are respectively positioned in the middle of each rectangular area, the amplitude and the phase of the electromagnetic waves in the four rectangular coupling holes 9 are consistent, but after the electromagnetic waves come out of the rectangular coupling holes 9, the electromagnetic waves propagate along the wide sides of the rectangular coupling holes 9 to two sides, so that the amplitudes and the phases of the two paths of electromagnetic waves are the same, but the phases of the two paths of electromagnetic waves are 180 degrees different, so that the amplitudes and the phases of the electromagnetic waves of two short metal ridges 7 positioned on the same side of the wide sides of the rectangular coupling holes 9 are the same, the amplitudes of the electromagnetic waves on the short metal ridges 7 on different sides are the same, and the phases of the electromagnetic waves on the microstrip lines are 180 degrees different, at the tail ends of the short metal ridges 7, the electromagnetic waves are coupled to the microstrip lines through the metal probes 6, and because of the 180-degree phase difference, eight of 16 groups of the microstrip lines rotate 180 degrees, so as to feed 64 rectangular microstrip patches 1 with equal amplitude and the same phase, and finally the 64 rectangular microstrip patches 1 radiate outwards with equal amplitude and the same phase to form an antenna subarray.

The preferred dimensions and relative positional relationships of the various parts in this embodiment are as follows:

the four rectangular microstrip patches with the same size are 3.5mm in length and 2.37mm in width, a rectangular hole is formed in the center of the long side of each rectangular microstrip patch, and the length and the width of each rectangular microstrip patch are 0.5 mm.

The microstrip line with a one-to-four structure is formed by splicing a plurality of sections of segmented microstrip lines with different widths and lengths, and specifically comprises a first segmented microstrip line 2-1, two second segmented microstrip lines 2-2 and four third segmented microstrip lines 2-3, wherein the first segmented microstrip line 2-1 is respectively connected with the two second segmented microstrip lines 2-2, the second segmented microstrip line 2-2 is connected with the two third segmented microstrip lines 2-3, the length of the first segmented microstrip line is 2.4mm, and the width of the first segmented microstrip line is 0.4 mm; the length of second subsection microstrip line is 1.5mm, and the width is 1mm, a bottom length of deducting in the middle of the second subsection microstrip line terminal is 0.3mm, highly is the hole of 0.3 mm's triangle-shaped, and the end is connected with the third subsection microstrip line that the width is 0.2mm, the third subsection microstrip line gos deep into the rectangular hole and is connected with rectangle microstrip paster, and four third subsection microstrip lines that the width is 0.2mm buckle 90 degrees, guarantee that the electromagnetic wave is the same at terminal phase place, and the third subsection microstrip line of 0.2mm width is 2.3mm before buckling partly length, and the partial length after buckling is 1mm, and this length can suitably prolong.

In this embodiment, the substrate material of the dielectric substrate 3 is Rogers 5880 (dielectric constant is 2.2, and tangent loss is 0.0013), the thickness of the dielectric substrate 3 is 0.508mm, the side length is 64mm, the size of the side length can be increased or decreased properly, a metal floor is arranged below the dielectric substrate, the thickness of the metal floor is 0.05-0.15mm, the side length is 64mm, and the size of the side length can be increased or decreased properly.

The diameter of the metal through-hole 5 is 2mm, and the metal probe 6 includes a cylinder having a diameter of 0.4mm and a height of 0.9mm and a cylinder having a diameter of 1.2mm and a height of 0.4 mm.

In the ridge gap waveguide feed network layer, the metal probes 6 are located at the position 0.1mm right above the tail end of the short metal ridge 7, the height of the short metal ridge 7 is 1.4mm, the width of the short metal ridge 7 is 1.2mm, the length of the short metal ridge is 3.3mm, the 16 metal probes 6 are identical in size and are arranged periodically, and the interval period is 11.2 mm. The metal pins 8 surround the short metal ridge 7, the distance from the short metal ridge 7 is 3.1mm, the metal pins 8 at the tail end of the short metal ridge 7 are 0.8mm away, the height of the metal pins 8 is 2mm, the length and the width of the metal pins are 1.4mm, the distance from the metal floor 4 above is 0.15-0.25mm, and an air gap layer with the thickness of 0.15-0.25mm is formed. The distance of rectangle coupling hole 9 and four short metal spine 7 is all the same, central symmetry point position promptly, and the length of rectangle coupling hole 9 is 5.6mm, and the width is 2.8mm, highly is 4mm, and the minor face central point of short metal spine 7 front end is 2.4mm along the x direction apart from the central point of rectangle coupling hole 9, is 5.6mm along the y direction, and four rectangle coupling hole sizes are identical, and are the cycle and arrange, and the cycle distance is 22.4 mm.

First rectangular channel and second rectangular channel processing are at the lower surface of metal roof 11, and the thickness of metal roof 11 is unanimous with the height of rectangle coupling hole 9, all is 4mm, and the length of side of metal roof is 64mm, and the length of side can be suitable increase or reduce, and the width of first rectangular channel is 2.6mm, and the degree of depth is 3.15mm, and length is 7mm, and the width of second rectangular channel is 2.6mm, and the degree of depth is 2.15mm, and length is 19.2 mm.

In the bottom layer feed network with wave ports: the three pairs of adjusting pins 12 are identical in size, the front ends of the first pair of adjusting pins 12 are aligned with the front ends of the second rectangular grooves, the height of each adjusting pin 12 is 2.15mm, the width of each adjusting pin is 1.05mm, the length of each adjusting pin is 0.9mm, each pair of adjusting pins 12 are symmetrically distributed in the second rectangular groove in the front-back direction, and the width of each second rectangular groove is 2.6mm, so that a gap of 0.5mm is formed between the two pins of each pair of adjusting pins 12. Two metal spine 13 are located the central point of the lower surface of metal roof, and be the symmetric distribution, the width of metal spine 13 is 1.2mm, highly be 1.4mm, length is 14.3mm, the broadside of metal spine 13 front end and second rectangular channel aligns, the distance apart from the second rectangular channel end is 7.2mm, 13 end of metal spine passes through size conversion and branch structure forms T type merit and divides knot 14, T type merit divides knot 14 width to be 1.6mm length to be 2mm, 14 end is two branch lines that the trapezoidal recess of falling formed for T type merit, the trapezoidal recess minor face width of falling is 0.7mm, the broadside width is 2.8mm, the degree of depth is 1 mm. The two branch lines are extended and are connected with a horizontal step metal ridge 15 at the tail end by a rotation angle of 90 degrees, the horizontal step metal ridge 15 is formed by connecting three metal strips with different widths, the first strip is 2.6mm in width and 0.4mm in length, the second strip is 2.2mm in width and 0.4mm in length, the third strip is 1mm in width and 3.6mm in length, and the tail end of the horizontal step metal ridge 15 is positioned in the center of the rectangular coupling hole 9. The tail end of the conversion metal ridge 16 extends into the first rectangular groove to form a transition metal ridge 22, the height of the transition metal ridge 22 is 4.55mm, the length of the transition metal ridge is half of that of the first rectangular groove and is 1.3mm, the width of the transition metal ridge is 1.2mm, the front end of the conversion metal ridge 16 is of a conversion structure, the width of the conversion metal ridge is 2mm, the length of the conversion metal ridge is 5.2mm, a vertical step metal ridge 17 is arranged below the conversion metal ridge 16, the vertical step metal ridge 17 and a WR-22 waveguide port 18 are machined in a groove 20 in the metal base plate, the tail end of the vertical step metal ridge 17 is aligned with the front end conversion structure of the upper conversion metal ridge 16 and is identical in size, the front end of the vertical step metal ridge 17 is located at the center position of the WR-22 waveguide port 18 in the metal base plate 19, the extending length of the vertical step metal ridge is 1mm, and two layers of steps are formed. The height of the first step is 0.95mm, the length is 0.9mm, the width is 1.2mm, the height of the second step is 1.4mm, the width is the same as that of the first step, and the length can be properly prolonged. The WR-22 waveguide port 18 has a length of 5.69mm, a width of 2.845mm, and a depth of 8 mm. The width of the groove 20 and the width of the metal cover plate 21 are both 10mm, the length can be 15mm, and both can be extended properly. As shown in fig. 7, which is a side view of the whole antenna array, there is an air gap of 0.15-0.25mm between the metal pins 8 located on the lower surface of the metal top plate 11 and the metal bottom plate 19, and there is an air gap of 0.15-0.25mm between the metal pins 8 located on the upper surface of the metal top plate 11 and the metal floor 4.

As shown in fig. 8, which is a graph of the reflection coefficient and the gain simulation result of the millimeter wave high gain filtering microstrip antenna array based on the ridge gap waveguide, the WR-22 wave port feeding port feeds in the electromagnetic wave, and the reflection coefficient | S can be obtained₁₁I is less than-15 dB in a frequency band of 34-36GHz, gain is higher than 25dBi in the frequency band of 34GHz-36GHz, peak gain is 25.4dBi at 35GHz, the effective aperture area of the antenna is 44.8mm multiplied by 50.54mm, and the antenna is obtained according to the following formulas (1) to (2):

D = 4πA _e ／λ ₀ ²（1）

η＝ G／D （2）

whereinA _e For the effective aperture area of the designed antenna array,Dis a coefficient of the direction, and is,λ ₀ is the wavelength corresponding to the center frequency, G is the simulated antenna gain,ηit is the radiation efficiency of the antenna, which can be calculated by combining the data in fig. 8, and the radiation efficiency of the antenna is higher than 90% in the operating frequency band.

As shown in fig. 9 to 12, E-plane and H-plane directional patterns of the high-gain filtering microstrip antenna array based on the ridge gap waveguide structure at 35GHz are shown, and the designed antenna array has a sidelobe level lower than-13 dB and good radiation performance according to the directional patterns.

Example 2

The utility model provides a high efficiency filter antenna array, includes two antenna arrays that the structure is the same completely, and every antenna array includes one deck radiation layer and two-layer feed network layer, and the superiors are the radiation layer, include the dielectric substrate, 64 antenna unit are printed on the dielectric substrate, are arranged in 4 x 16 array form, and every antenna unit includes 2 x 2 rectangle microstrip paster, and its rectangle coupling hole that corresponds, short metal spine and metal through-hole all are the same with the number of antenna unit, and the number is 64, and other parts of this embodiment 2 are the same with embodiment 1.

Example 3

A communication device comprising the high efficiency filtered antenna array of embodiment 1, comprising at least one antenna array, each antenna array comprising one radiating layer and two feed network layers.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.