阅读说明：本技术 一种超宽频带的定向天线及在无线通信网络覆盖中的应用 (Ultra-wideband directional antenna and application thereof in wireless communication network coverage ) 是由 许佐云 伍莲华 于 2021-10-15 设计创作，主要内容包括：本发明公开了一种超宽频带的定向天线,属于天线技术领域,其包括射频连接器、同轴电缆、高频双面覆铜PCB板、反射板和天线罩,天线罩扣合在反射板上；高频双面覆铜PCB板固定安装在反射板上,高频双面覆铜PCB板的正面设有馈电连接点、传输线、阻抗匹配线路、开路线匹配线路、低频段辐射振子、中频段辐射振子、高频段辐射振子、高频段辐射振子缝隙孔；背面设置有接地焊接处、传输线路缝隙孔、背面传输线路底层覆铜面和耦合覆铜片；同轴电缆的第一端与低频段辐射振子、中频段辐射振子、高频段辐射振子连通。本发明通过改变介质基板上微带传输线的大小和形状以及反射板和高频双面覆铜PCB板的间距,来获得天线较好的电性能参数。(The invention discloses an ultra-wideband directional antenna, which belongs to the technical field of antennas and comprises a radio frequency connector, a coaxial cable, a high-frequency double-sided copper-clad PCB (printed circuit board), a reflector plate and an antenna housing, wherein the antenna housing is buckled on the reflector plate; the high-frequency double-sided copper-clad PCB is fixedly arranged on the reflecting plate, and the front side of the high-frequency double-sided copper-clad PCB is provided with a feed connection point, a transmission line, an impedance matching circuit, an open circuit line matching circuit, a low-frequency-band radiation oscillator, a medium-frequency-band radiation oscillator, a high-frequency-band radiation oscillator and a high-frequency-band radiation oscillator gap hole; the back side is provided with a grounding welding part, a transmission line gap hole, a back side transmission line bottom layer copper-clad surface and a coupling copper-clad sheet; the first end of the coaxial cable is communicated with the low-frequency-band radiation oscillator, the medium-frequency-band radiation oscillator and the high-frequency-band radiation oscillator. The invention obtains better electrical performance parameters of the antenna by changing the size and the shape of the microstrip transmission line on the dielectric substrate and the distance between the reflector and the high-frequency double-sided copper-clad PCB.)

1. The directional antenna with the ultra-wide frequency band is characterized by comprising a radio frequency connector, a coaxial cable, a high-frequency double-sided copper-clad PCB, a reflecting plate and an antenna housing, wherein the antenna housing is buckled on the reflecting plate;

the high-frequency double-sided copper-clad PCB is fixedly arranged on the reflecting plate, and the front side of the high-frequency double-sided copper-clad PCB is provided with a feed connection point, a transmission line, an impedance matching circuit, an open circuit line matching circuit, a low-frequency-band radiation oscillator, a medium-frequency-band radiation oscillator, a high-frequency-band radiation oscillator and a high-frequency-band radiation oscillator gap hole;

the back of the high-frequency double-sided copper-clad PCB board is provided with a grounding welding part, a transmission line gap hole, a back transmission line bottom copper-clad surface and a coupling copper-clad sheet;

the outer conductor at the first end of the coaxial cable is welded and conducted with the grounding welding position; after the inner conductor at the first end of the coaxial cable is welded and communicated with the feed connection point, the inner conductor is communicated with the low-frequency band radiation oscillator, the middle-frequency band radiation oscillator and the high-frequency band radiation oscillator through an impedance matching circuit and an open circuit matching circuit;

and the second end of the coaxial cable is connected, conducted and welded with the radio frequency connector.

2. The ultra-wideband directional antenna as claimed in claim 1, wherein the impedance matching circuit comprises a first impedance matching circuit and a second impedance matching circuit, and the open-circuit line matching circuit comprises a first open-circuit line matching circuit and a second open-circuit line matching circuit, wherein a first end of the first impedance matching circuit is connected and conducted to the feed connection point through a transmission line, a second end of the first impedance matching circuit is connected and conducted to a first end of the first open-circuit line matching circuit, a second end of the first open-circuit line matching circuit is connected and conducted to a first end of the second open-circuit line matching circuit, a second end of the second open-circuit line matching circuit is connected and conducted to a first end of the second impedance matching circuit, and a second end of the second impedance matching circuit is connected and conducted to the low-frequency band radiator element through a transmission line, The medium-frequency band radiation oscillator and the high-frequency band radiation oscillator are connected and conducted.

3. The ultra-wideband directional antenna as claimed in claim 2, wherein said low and medium band radiating elements are L-shaped; the high-frequency band radiation oscillator is in the shape of a cup-shaped plum petal with taper and radian.

4. The directional antenna of ultra wide band according to claim 3, wherein the low band radiating element, the middle band radiating element and the high band radiating element are all printed on the front surface of the high frequency double-sided copper-clad PCB board by microstrip lines; the transmission line, the first impedance matching circuit, the second impedance matching circuit, the first open circuit line matching circuit and the second open circuit line matching circuit are all printed on the front surface of the high-frequency double-sided copper-clad PCB by microstrip lines;

the coupling copper-clad sheet comprises a first coupling copper-clad sheet and a second coupling copper-clad sheet; the first coupling copper-clad plate and the second coupling copper-clad plate are printed on the back of the high-frequency double-sided copper-clad PCB by microstrip lines; the first coupling copper-clad sheet is rectangular in shape, and the second coupling copper-clad sheet is horn-shaped in shape; the appearance of the copper-coated surface at the bottom layer of the back transmission line is similar to an h shape;

the high-frequency band radiation oscillator gap holes comprise four high-frequency band radiation oscillator first gap holes and one high-frequency band radiation oscillator second gap hole; the appearance of the first gap hole of the high-frequency band radiation oscillator is sword-shaped, and the appearance of the second gap hole of the high-frequency band radiation oscillator is circular;

the transmission line slot hole is L-shaped.

5. The ultrawide band directional antenna of claim 4, wherein the heights of the low band radiating element, the middle band radiating element and the high band radiating element are all 1/4 λ₀Wherein λ is₀A spatial free wavelength at a central frequency point; the low-frequency band radiation oscillator the intermediate frequency band radiation oscillator with the high-frequency band radiation oscillator sets up on same and the adjacent medium substrate in position, the intermediate frequency band radiation oscillator sets up the left side below of high-frequency band radiation oscillator, the low-frequency band radiation oscillator sets up the right side below of high-frequency band radiation oscillator.

6. The ultra-wideband directional antenna as claimed in claim 1, wherein the ultra-wideband directional antenna has a low frequency band of 698MHz to 960MHz, a middle frequency band of 1710MHz to 2200MHz, and a high frequency band of 2300MHz to 3800 MHz; the horizontal plane half-power angle of the directional antenna of the ultra-wide band is 65-80 degrees, the vertical plane half-power angle is 55-65 degrees, and the front-to-back ratio is more than 23 dB.

7. The directional antenna of ultra wide band as claimed in claim 1, wherein the high frequency double-sided copper-clad PCB has a thickness of 0.80mm to 1.20mm, a length of 128.46mm to 131.38mm, and a width of 102.54mm to 104.75 mm; the high-frequency double-sided copper-clad PCB is made of an F4BM-2 double-sided copper-clad plate, and has a dielectric constant of 2.65.

8. The directional antenna for ultra-wide band according to claim 7, wherein said reflector plate has a length of 208mm to 212mm, a width of 170mm to 174mm, and a thickness of 1.4mm to 1.6mm, and is made of aluminum alloy plate.

9. The directional antenna of ultra wide band according to claim 8, wherein the distance between the high frequency double-sided copper-clad PCB board and the reflection board is 12.6 mm-14.4 mm, and the high frequency double-sided copper-clad PCB board is fixedly mounted on the reflection board through plastic posts and plastic screws.

10. Use of an ultra-wideband directional antenna as claimed in any one of claims 1 to 9 in a wireless communication network coverage, wherein the wireless communication network coverage of the ultra-wideband directional antenna application comprises the low frequency band of 4G-LTE system, CDMA frequency band, GSM frequency band, DCS frequency band, PCS frequency band, TD-SCDMA, WCDMA, CDMA2000 frequency band, WLAN frequency band, 4G-LTE frequency band, and the low frequency operating band of mobile communication 5G system.

Technical Field

The invention belongs to the technical field of antennas, and particularly relates to an ultra-wideband directional antenna and application thereof in wireless communication network coverage.

Background

5G also called fifth generation mobile communication technology, foreign language abbreviation: 5G, also the extension behind 4G, 5G is the main direction of new generation mobile communication technology development, is the important component of the information infrastructure of future new generation, compares with 4G, not only will further promote user's network experience, still will satisfy the application demand of future everything interconnection and new generation artificial intelligence simultaneously, and the industry and belief department publishes the 5G frequency channel, plans 3300 MHz-3600 MHz frequency channel and regards as the operating frequency channel of 5G system low frequency.

The frequency range of the conventional mobile communication directional antenna is only 2G, 3G and 4G frequency bands generally, how to extend the frequency range to the low-frequency working frequency band of a 5G system on the basis of the existing frequency band and achieve excellent electrical performance indexes is a technical problem to be solved urgently by the current mobile communication directional antenna.

Disclosure of Invention

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a directional antenna with an ultra-wide frequency band comprises a radio frequency connector, a coaxial cable, a high-frequency double-sided copper-clad PCB, a reflecting plate and an antenna housing, wherein the antenna housing is buckled on the reflecting plate;

the high-frequency double-sided copper-clad PCB is fixedly arranged on the reflecting plate, and the front side of the high-frequency double-sided copper-clad PCB is provided with a feed connection point, a transmission line, an impedance matching circuit, an open circuit line matching circuit, a low-frequency-band radiation oscillator, a medium-frequency-band radiation oscillator, a high-frequency-band radiation oscillator and a high-frequency-band radiation oscillator gap hole;

the back of the high-frequency double-sided copper-clad PCB board is provided with a grounding welding part, a transmission line gap hole, a back transmission line bottom copper-clad surface and a coupling copper-clad sheet;

the outer conductor at the first end of the coaxial cable is welded and conducted with the grounding welding position; after the inner conductor at the first end of the coaxial cable is welded and communicated with the feed connection point, the inner conductor is communicated with the low-frequency band radiation oscillator, the middle-frequency band radiation oscillator and the high-frequency band radiation oscillator through an impedance matching circuit and an open circuit matching circuit;

and the second end of the coaxial cable is connected, conducted and welded with the radio frequency connector.

Further, the impedance matching circuit includes a first impedance matching circuit and a second impedance matching circuit, the open route matching circuit includes a first open route matching circuit and a second open route matching circuit, wherein a first end of the first impedance matching line is conductively connected to the feed connection point via a transmission line, the second end of the first impedance matching line is connected and conducted with the first end of the first open-circuit line matching line, the second end of the first open circuit line matching circuit is connected and conducted with the first end of the second open circuit line matching circuit, the second end of the second open circuit line matching line is connected and conducted with the first end of the second impedance matching line, and the second end of the second impedance matching circuit is connected and conducted with the low-frequency band radiation oscillator, the medium-frequency band radiation oscillator and the high-frequency band radiation oscillator through transmission lines.

Furthermore, the low-frequency band radiating oscillator and the medium-frequency band radiating oscillator are both L-shaped; the high-frequency band radiation oscillator is in the shape of a cup-shaped plum petal with taper and radian.

Furthermore, the low-frequency band radiation oscillator, the medium-frequency band radiation oscillator and the high-frequency band radiation oscillator are printed on the front surface of the high-frequency double-sided copper-clad PCB by microstrip lines; the transmission line, the first impedance matching circuit, the second impedance matching circuit, the first open circuit line matching circuit and the second open circuit line matching circuit are all printed on the front surface of the high-frequency double-sided copper-clad PCB by microstrip lines;

the coupling copper-clad sheet comprises a first coupling copper-clad sheet and a second coupling copper-clad sheet; the first coupling copper-clad plate and the second coupling copper-clad plate are printed on the back of the high-frequency double-sided copper-clad PCB by microstrip lines; the first coupling copper-clad sheet is rectangular in shape, and the second coupling copper-clad sheet is horn-shaped in shape; the appearance of the copper-coated surface at the bottom layer of the back transmission line is similar to an h shape;

the high-frequency band radiation oscillator gap holes comprise four high-frequency band radiation oscillator first gap holes and one high-frequency band radiation oscillator second gap hole; the appearance of the first gap hole of the high-frequency band radiation oscillator is sword-shaped, and the appearance of the second gap hole of the high-frequency band radiation oscillator is circular;

the transmission line slot hole is L-shaped.

Furthermore, the heights of the low-frequency band radiating vibrator, the middle-frequency band radiating vibrator and the high-frequency band radiating vibrator are all 1/4 lambda₀Wherein λ is₀A spatial free wavelength at a central frequency point; the low-frequency band radiation oscillator the intermediate frequency band radiation oscillator with the high-frequency band radiation oscillator sets up on same and the adjacent medium substrate in position, the intermediate frequency band radiation oscillator sets up the left side below of high-frequency band radiation oscillator, the low-frequency band radiation oscillator sets up the right side below of high-frequency band radiation oscillator.

Furthermore, the low frequency band of the directional antenna of the ultra-wideband is 698 MHz-960 MHz, the middle frequency band is 1710 MHz-2200 MHz, and the high frequency band is 2300 MHz-3800 MHz; the horizontal plane half-power angle of the directional antenna of the ultra-wide band is 65-80 degrees, the vertical plane half-power angle is 55-65 degrees, and the front-to-back ratio is more than 23 dB.

Furthermore, the thickness of the high-frequency double-sided copper-clad PCB is 0.80-1.20 mm, the length is 128.46-131.38 mm, and the width is 102.54-104.75 mm; the high-frequency double-sided copper-clad PCB is made of an F4BM-2 double-sided copper-clad plate, and has a dielectric constant of 2.65.

Further, the length of the reflecting plate is 208 mm-212 mm, the width of the reflecting plate is 170 mm-174 mm, the thickness of the reflecting plate is 1.4 mm-1.6 mm, and the reflecting plate is made of aluminum alloy plates.

Further, the distance between the high-frequency double-sided copper-clad PCB and the reflecting plate is 12.6-14.4 mm, and the high-frequency double-sided copper-clad PCB is fixedly installed on the reflecting plate through plastic columns and plastic screws.

The ultra-wideband directional antenna is applied to wireless communication network coverage, and the wireless communication network coverage applied to the ultra-wideband directional antenna comprises a low frequency band of a 4G-LTE system, a CDMA frequency band, a GSM frequency band, a DCS frequency band, a PCS frequency band, a TD-SCDMA frequency band, a WCDMA frequency band, a CDMA2000 frequency band, a WLAN frequency band, a 4G-LTE frequency band and a low frequency working frequency band of a mobile communication 5G system.

The invention has the beneficial effects that:

the invention provides an ultra-wideband directional antenna, which utilizes the technologies of a dielectric micro-strip technology, a multi-frequency and ultra-wideband technology, coupling resonance and the like, and obtains better electrical performance parameters of the antenna by changing the size and the shape of an impedance matching circuit, an open circuit line matching circuit, a low-frequency band radiation oscillator, a medium-frequency band radiation oscillator, a high-frequency band radiation oscillator, a micro-strip transmission line on a coupling copper-clad plate and the distance between a reflecting plate and a high-frequency double-sided copper-clad PCB plate on a dielectric substrate.

Meanwhile, the radiation oscillator gap holes and the transmission line gap holes are arranged on the front side and the back side of the high-frequency double-sided copper-clad PCB, and capacitive reactance and inductive reactance matched with the antenna performance can be obtained, so that perfect matching of antenna impedance is achieved, better electrical performance indexes can be achieved in limited space and volume, the complex design of an impedance matching network is omitted, miniaturization of the impedance matching network is guaranteed, the impedance matching network can be applied to communication equipment with limited size, and the impedance matching network is small in size, light in weight, wide in frequency band and better in radiation performance indexes.

Drawings

Fig. 1 is a schematic structural diagram of an ultra-wideband directional antenna;

FIG. 2 is a schematic structural diagram of a reflector plate;

fig. 3 is a schematic front view of a radome;

fig. 4 is a schematic perspective view of a radome;

FIG. 5 is a schematic diagram of the front structure of a high-frequency double-sided copper-clad PCB;

FIG. 6 is a schematic diagram of a front-side top-layer copper-clad structure of a high-frequency double-sided copper-clad PCB;

FIG. 7 is a schematic diagram of a back structure of a high-frequency double-sided copper-clad PCB;

FIG. 8 is a schematic diagram of a back bottom copper-clad structure of a high-frequency double-sided copper-clad PCB;

FIG. 9 is a standing wave diagram for ultra wide band directional antenna testing;

FIG. 10 is a directional diagram of the test of the ultra-wideband directional antenna in the 698MHz band;

FIG. 11 is a directional diagram of an ultra-wideband directional antenna tested in the 824MHz band;

fig. 12 is a directional diagram of an ultra-wideband directional antenna tested in the 960MHz band;

FIG. 13 is a directional diagram of an ultra-wideband directional antenna tested in the 1710MHz band;

FIG. 14 is a directional diagram of an ultra-wideband directional antenna tested at the 2170MHz band;

FIG. 15 is a directional diagram of an ultra-wideband directional antenna tested in the 2450MHz band;

FIG. 16 is a directional diagram of an ultra-wideband directional antenna tested in the 2690MHz band;

fig. 17 is a directional diagram of the ultra-wideband directional antenna tested in 3500MHz frequency band;

wherein, 1, radio frequency connector; 2. a coaxial cable; 3. a reflective plate; 4. an antenna cover; 5. a feed connection point; 6. a transmission line; 7. a first impedance matching line; 8. a first open circuit line matching circuit; 9. a second open circuit line matching circuit; 10. a second impedance matching line; 11. a low frequency band radiating element; 12. a mid-band radiating oscillator; 13. a high frequency band radiating oscillator; 14. a high-frequency band radiation oscillator first slit hole; 15. a second slit hole of the high-frequency band radiation oscillator; 16. a ground weld; 17. a transmission line slot; 18. the bottom layer of the back transmission line is covered with a copper surface; 19. a first coupling copper-clad sheet; 20. the second coupling covers the copper sheet.

Detailed Description

The invention provides an ultra-wideband directional antenna. The technical solution of the present invention is described in detail below with reference to the accompanying drawings so that it can be more easily understood and appreciated.

Example 1

Referring to fig. 1-8, an ultra-wideband directional antenna includes a radio frequency connector 1, a coaxial cable 2, a high-frequency double-sided copper-clad PCB, a reflector 3, and an antenna housing 4.

Wherein, the antenna housing 4 is buckled on the reflector plate 3.

The high-frequency double-sided copper-clad PCB is fixedly arranged on the reflecting plate 3, and the front side of the high-frequency double-sided copper-clad PCB is provided with a feed connection point 5, a transmission line 6, an impedance matching circuit, an open circuit line matching circuit, a low-frequency band radiation oscillator 11, a medium-frequency band radiation oscillator 12, a high-frequency band radiation oscillator 13 and a high-frequency band radiation oscillator gap hole.

The back of the high-frequency double-sided copper-clad PCB board is provided with a grounding welding part 16, a transmission line gap hole 17, a back transmission line bottom layer copper-clad surface 18 and a coupling copper-clad sheet.

The outer conductor of the first end of the coaxial cable 2 is welded and conducted with the grounding welding position 16; after the inner conductor at the first end of the coaxial cable 2 is welded and communicated with the feed connection point 5, the inner conductor is communicated with the low-frequency band radiation oscillator 11, the middle-frequency band radiation oscillator 12 and the high-frequency band radiation oscillator 13 through an impedance matching circuit and an open circuit matching circuit; and the second end of the coaxial cable 2 is connected and conducted with the radio frequency connector 1 and is welded and fixed.

In this embodiment, the impedance matching circuit includes a first impedance matching circuit 7 and a second impedance matching circuit 10, and the open circuit matching circuit includes a first open circuit matching circuit 8 and a second open circuit matching circuit 9, wherein a first end of the first impedance matching circuit 7 is connected and conducted with the feed connection point 5 through the transmission line 6, a second end of the first impedance matching circuit 7 is connected and conducted with a first end of the first open circuit matching circuit 8, a second end of the first open circuit matching circuit 8 is connected and conducted with a first end of the second open circuit matching circuit 9, a second end of the second open circuit matching circuit 9 is connected and conducted with a first end of the second impedance matching circuit 10, and a second end of the second impedance matching circuit 10 is connected and conducted with the low-frequency band radiation oscillator 11, the medium-frequency band radiation oscillator 12, and the high-frequency band radiation oscillator 13 through the transmission line 6.

In the present embodiment, the low-band radiating element 11 and the mid-band radiating element 12 are both L-shaped; the shape of the high-frequency band radiation oscillator 13 is a cup-shaped plum petal with a taper and a radian.

In the embodiment, the low-frequency band radiation oscillator 11, the medium-frequency band radiation oscillator 12 and the high-frequency band radiation oscillator 13 are all printed on the front surface of the high-frequency double-sided copper-clad PCB by microstrip lines; the transmission line 6, the first impedance matching circuit 7, the second impedance matching circuit 10, the first open circuit line matching circuit 8 and the second open circuit line matching circuit 9 are all printed on the front surface of the high-frequency double-sided copper-clad PCB by microstrip lines.

In the present embodiment, the coupling copper-clad sheet includes a first coupling copper-clad sheet 19 and a second coupling copper-clad sheet 20; the first coupling copper-clad plate 19 and the second coupling copper-clad plate 20 are printed on the back of the high-frequency double-sided copper-clad PCB by microstrip lines; the first coupling copper-covered sheet 19 is rectangular in shape, and the second coupling copper-covered sheet 20 is horn-shaped in shape; the back side transmission line bottom copper clad surface 18 is shaped like an h.

In this embodiment, the high-band radiation oscillator slot holes include a high-band radiation oscillator first slot hole 14 and a high-band radiation oscillator second slot hole 15, where the number of the high-band radiation oscillator first slot holes 14 is four and the number of the high-band radiation oscillator second slot holes 15 is one; the first slit hole 14 of the high-frequency band radiation oscillator is in a sword shape, and the second slit hole 15 of the high-frequency band radiation oscillator is in a circular shape.

In this embodiment, the transmission line slot aperture is L-shaped in profile.

In the embodiment, in the front microstrip transmission line impedance matching of the high-frequency double-sided copper-clad PCB, a brand new unique design is adopted, the front microstrip transmission line comprises a plurality of sections of impedance transformation lines and an open circuit line matching line, the front transmission line of the high-frequency double-sided copper-clad PCB comprises a transmission line 6, a first impedance matching line 7, a first open circuit line matching line 8, a second open circuit line matching line 9 and a second impedance matching line 10, the microstrip transmission line 6 is designed into a matched line with irregular shapes such as a convex shape, an L shape and the like, and better electrical performance parameters of the antenna are obtained by changing the size and the shape of the microstrip transmission line 6 on the high-frequency double-sided copper-clad PCB and the distance between the microstrip transmission lines 6. Meanwhile, four sword-shaped gap holes and one circular gap hole are arranged on the high-frequency section radiation oscillator 13, the design can change the capacitive reactance and the inductive reactance of the antenna performance, the number and the size of the shapes of the gap holes are adjusted, the capacitive reactance and the inductive reactance matched with the antenna performance can be obtained, and the better electrical performance index of the antenna is obtained.

In the embodiment, in the impedance matching of the back microstrip transmission line of the high-frequency double-sided copper-clad PCB, the appearance of the transmission line slot hole at the back of the high-frequency double-sided copper-clad PCB is set to be L-shaped, the appearance of the first coupling copper-clad sheet 19 is set to be rectangular, the appearance of the second coupling copper-clad sheet 20 is set to be horn-shaped, the appearance of the copper-clad surface 18 at the bottom layer of the high-frequency double-sided copper-clad PCB is set to be similar to h-shaped, by using the dielectric microstrip technology, the multi-frequency and ultra-wide band technology and the coupling resonance technology, the capacitive reactance and inductive reactance matched with the antenna performance can be obtained by changing the designed shapes and sizes of the grounding circuit, the slot hole and the coupling copper-clad sheet on the dielectric substrate, so that the directional antenna of the ultra-wide band can play the role of coupling resonance in the matching of the performance, the unbalance of the current becomes balance, and the characteristics of the broadband and the low standing wave are formed, thereby achieving a conjugate match of the antenna impedance.

In this embodiment, the low-frequency band radiating element 11 and the medium-frequency band radiating element 12 are designed to be L-shaped, so that the height of the radiating elements can be reduced, the size of the antenna can be reduced, and the volume of the antenna structure can be reduced; in the design of the front high-frequency section radiating oscillator 13 of the high-frequency double-sided copper-clad PCB, the high-frequency section radiating oscillator 13 is in a cup-shaped plum petal shape with taper and radian, so that the electrical length from the feed connection point 5 to each top is gradually changed, and resonance of each frequency point is achieved; the design of the embodiment can increase the bandwidth, simultaneously plays a role in coupling resonance in the aspect of impedance matching, and can achieve perfect electrical performance indexes in a limited space and a limited volume.

The ultra-wideband directional antenna provided by the embodiment is detected and verified by an instrument, the frequency range can reach 698 MHz-960 MHz/1710 MHz-2200 MHz/2300 MHz-3800 MHz, the wideband reaches a more perfect coverage range and better performance than similar products, and the ultra-wideband directional antenna can be applied to coverage of various wireless communication networks from 2G to 5G; the low frequency band is 698 MHz-960 MHz, the gain reaches about 7dBi, and the standing-wave ratio is below 1.50; the intermediate frequency range is 1710 MHz-2200 MHz, the gain reaches about 8dBi, and the standing-wave ratio is below 1.80; the high frequency band is 2300 MHz-3800 MHz, the gain reaches about 9dBi, the standing-wave ratio is below 1.60, the horizontal plane half-power angle of the ultra-wide band directional antenna is 65-80 degrees, the vertical plane half-power angle is 55-65 degrees, and the front-to-back ratio is more than 23 dB. Wherein, the heights of the low-frequency band radiating vibrator 11, the middle-frequency band radiating vibrator 12 and the high-frequency band radiating vibrator 13 are all 1/4 lambda₀Wherein λ is₀A spatial free wavelength at a central frequency point; the low-frequency band radiating vibrator 11, the middle-frequency band radiating vibrator 12 and the high-frequency band radiating vibrator 13 are arranged on the same medium substrate, the positions of the medium substrate and the high-frequency band radiating vibrator are adjacent, the middle-frequency band radiating vibrator 12 is arranged on the left lower side of the high-frequency band radiating vibrator 13, and the low-frequency band radiating vibrator 11 is arranged on the right lower side of the high-frequency band radiating vibrator 13. The design greatly reduces the volume and the area of the antenna structure, simultaneously optimizes the array structure of the antenna oscillator, ensures that the directional antenna of the ultra-wide band has the advantages of small volume, simple structure, better performance index, easiness in large-scale production and the like, reduces the cost of products, and enhances the market competitiveness of the products.

In the embodiment, the thickness of the directional antenna of the ultra-wideband is 25mm, the thickness of the high-frequency double-sided copper-clad PCB is 0.80 mm-1.20 mm, the length is 128.46 mm-131.38 mm, and the width is 102.54 mm-104.75 mm; the high-frequency double-sided copper-clad PCB is made of an F4BM-2 double-sided copper-clad plate, and has a dielectric constant of 2.65. The length of the reflecting plate 3 is 208 mm-212 mm, the width is 170 mm-174 mm, the thickness is 1.4 mm-1.6 mm, and the reflecting plate 3 is made of aluminum alloy plate. The distance between the high-frequency double-sided copper-clad PCB and the reflecting plate 3 is 12.6-14.4 mm, and the high-frequency double-sided copper-clad PCB is fixedly arranged on the reflecting plate 3 through plastic columns and plastic screws.

The directional antenna of the ultra-wide band provided by the embodiment has the characteristics of simple feed, small size, small thickness, easiness in scale production, good radiation performance index and the like, and meanwhile, the directional antenna of the ultra-wide band has a simple structure, low cost and convenience in installation.

Meanwhile, the limitation that the traditional directional antenna is lack of a 5G frequency band is broken through, directional radiation of an ultra-wide frequency band is realized, the cost is low, and the problems that the traditional ultra-wide frequency antenna is difficult to process and debug, high in cost and poor in performance can be solved; the antenna is simple to manufacture, easy to produce in batches, small in size, light in weight, convenient to install, and has the advantages of being small in loss, good in impedance matching, high in gain, low in standing wave ratio and the like.

FIG. 9 is a standing wave diagram of an ultra wide band directional antenna test; FIG. 10 is a directional diagram of the test of the ultra-wideband directional antenna in the 698MHz band; FIG. 11 is a directional diagram of an ultra-wideband directional antenna tested in the 824MHz band; fig. 12 is a directional diagram of an ultra-wideband directional antenna tested in the 960MHz band; FIG. 13 is a directional diagram of an ultra-wideband directional antenna tested in the 1710MHz band; FIG. 14 is a directional diagram of an ultra-wideband directional antenna tested at the 2170MHz band; FIG. 15 is a directional diagram of an ultra-wideband directional antenna tested in the 2450MHz band; FIG. 16 is a directional diagram of an ultra-wideband directional antenna tested in the 2690MHz band; fig. 17 shows the directional diagram of the ultra-wideband directional antenna tested in the 3500MHz band.

Example 2

This embodiment is an application of the ultra wide band directional antenna provided in embodiment 1 in a wireless communication network coverage, where the wireless communication network coverage applied by the ultra wide band directional antenna includes a low frequency band of a 4G-LTE system, a CDMA frequency band, a GSM frequency band, a DCS frequency band, a PCS frequency band, a TD-SCDMA frequency band, a WCDMA frequency band, a CDMA2000 frequency band, a WLAN frequency band, a 4G-LTE frequency band, and a low frequency operating frequency band of a mobile communication 5G system.

The technical solutions of the present invention are fully described above, it should be noted that the specific embodiments of the present invention are not limited by the above description, and all technical solutions formed by equivalent or equivalent changes in structure, method, or function according to the spirit of the present invention by those skilled in the art are within the scope of the present invention.