阅读说明：本技术 一种波束可重构的宽阻带抑制滤波天线 (Wave beam reconfigurable wide stop band suppression filter antenna ) 是由 陈付昌 向凯燃 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种波束可重构的宽阻带抑制滤波天线,包括第一、二介质板和第一、二电压控制模块；第二介质板位于第一介质板上方,它们之间存在空气层；第二介质板上表面形成有覆铜层；覆铜层上设有矩形贴片,第一、二、三、四寄生贴片,第一、二变容二极管、第一、二、三、四贴片电感,第一、二、三、四电压控制接口；第一介质板下表面形成有覆铜层,上表面设有接地板,接地板上设有耦合孔径；第一介质板的覆铜层上设有第一、二半波长U型谐振器和耦合馈线,在第一介质板上表面和下表面覆铜层制作有输入端口。本发明具有宽阻带抑制的功能,可以实现±45°的波束扫描方向范围,且在改变波束方向的同时可保持通带范围内的S<Sub>11</Sub>小于-10dB及增益变化较小。(The invention discloses a wave beam reconfigurable wide stop band rejection filter antenna, which comprises a first dielectric plate, a second dielectric plate, a first voltage control module and a second voltage control module; the second dielectric plate is positioned above the first dielectric plate, and an air layer is arranged between the second dielectric plate and the first dielectric plate; a copper-clad layer is formed on the upper surface of the second dielectric plate; the copper-clad layer is provided with a rectangular patch, a first parasitic patch, a second parasitic patch, a third parasitic patch, a fourth parasitic patch, a first varactor, a second varactor, a first patch inductor, a second patch inductor, a third patch inductor, a fourth patch inductor, a first voltage control interface, a second voltage control interface, a third voltage control interface and a fourth voltage control interface; a copper-clad layer is formed on the lower surface of the first dielectric plate, a grounding plate is arranged on the upper surface of the first dielectric plate, and a coupling aperture is formed in the grounding plate; first, theA first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator and a coupling feeder are arranged on a copper-clad layer of a dielectric plate, and input ports are formed in copper-clad layers on the upper surface and the lower surface of the first dielectric plate. The invention has the function of wide stop band suppression, can realize the range of +/-45-degree beam scanning direction, and can keep S in the range of a pass band while changing the beam direction 11 Less than-10 dB and less gain variation.)

1. A beam reconfigurable wide stopband rejection filter antenna, comprising: the power supply comprises a first dielectric plate, a second dielectric plate, a first voltage control module and a second voltage control module; the second dielectric plate is positioned above the first dielectric plate, and an air layer is arranged between the first dielectric plate and the second dielectric plate; a copper-clad layer is formed on the upper surface of the second dielectric plate, and a rectangular patch, a first parasitic patch, a second parasitic patch, a third parasitic patch, a fourth parasitic patch, a first varactor diode, a second varactor diode, a first patch inductor, a second patch inductor, a third patch inductor, a fourth patch inductor, a first voltage control interface, a second voltage control interface, a third voltage control interface and a fourth voltage control interface are respectively arranged on the copper-clad layer; the rectangular patch is used as a main radiation source and is arranged in the middle of the copper-clad layer; the first parasitic patch and the second parasitic patch are connected through the first variable capacitance diode to form a parasitic unit, are symmetrical relative to the first variable capacitance diode and are positioned on one side of the rectangular patch, the third parasitic patch and the fourth parasitic patch are connected through the second variable capacitance diode to form a parasitic unit, are symmetrical relative to the second variable capacitance diode and are positioned on the other side of the rectangular patch, the two parasitic units and the rectangular patch share the same symmetry axis, namely the centers of the first variable capacitance diode and the second variable capacitance diode and the center of the rectangular patch are on the same straight line, and the current distribution generated by the two parasitic units is different by adjusting the capacitance values of the two variable capacitance diodes, so that the control of the beam direction is realized; the first parasitic patch is connected with the first voltage control interface through a first patch inductor, the second parasitic patch is connected with the second voltage control interface through a second patch inductor, the first voltage control interface and the second voltage control interface are respectively connected with the first voltage control module, the third parasitic patch is connected with the third voltage control interface through a third patch inductor, the fourth parasitic patch is connected with the fourth voltage control interface through a fourth patch inductor, and the third voltage control interface and the fourth voltage control interface are respectively connected with the second voltage control module, wherein the patch inductor is used for preventing the current of the parasitic patch from entering the voltage control module through the voltage control interface; the lower surface of the first dielectric plate is provided with a copper-clad layer, the upper surface of the first dielectric plate is provided with a ground plate, the ground plate is provided with a coupling aperture, the copper-clad layer of the first dielectric plate is respectively provided with a first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator and a coupling feeder, the copper-clad layers of the upper surface and the lower surface of the first dielectric plate are provided with an input port, the first half-wavelength U-shaped resonator is positioned beside the second half-wavelength U-shaped resonator, the second half-wavelength U-shaped resonator is positioned beside the coupling feeder, the coupling feeder is connected with the input port and can couple the energy transmitted from the input port to the second half-wavelength U-shaped resonator, the second half-wavelength U-shaped resonator couples the energy to the first half-wavelength U-shaped resonator through the coupling effect, and the first half-wavelength U-shaped resonator couples the energy to the rectangular patch through the, therefore, a third-order filtering function is realized, wherein the combination of the coupling line and the stub line between the first half-wavelength U-shaped resonator and the second half-wavelength U-shaped resonator realizes wide stop band suppression, and the combination of the coupling line and the stub line between the second half-wavelength U-shaped resonator and the coupling feeder line realizes wide stop band suppression.

2. The beam reconfigurable wide stopband rejection filter antenna of claim 1, wherein: the sizes of the first parasitic patch, the second parasitic patch, the third parasitic patch and the fourth parasitic patch are the same.

3. The beam reconfigurable wide stopband rejection filter antenna of claim 1, wherein: the input port is a 50 ohm impedance matching port.

Technical Field

The invention relates to the technical field of antennas, in particular to a wide stop band rejection filter antenna with reconfigurable wave beams.

Background

With the rapid development of wireless communication in recent years, with the arrival of fifth generation communication systems, higher demands are made on the communication capacity and transmission rate of the systems. The patch antenna is widely applied to wireless communication systems due to its advantages of light weight, small size, easy conformality, easy processing, low cost, etc. With the rapid development of 5G technology and the rapid growth of wireless communication users, it is urgently required to sufficiently improve the spectrum utilization rate within a very limited spectrum resource, and the antenna beam reconfigurable technology is an effective solution for meeting the requirement, and is increasingly applied to Personal Communication Systems (PCS), satellite communication systems, wireless local loops, wireless Local Area Networks (LANs) and wireless ATM systems. In addition, as frequency spectrum resources are fully utilized, frequency multiplication interference is more serious, and therefore, the filter antenna with wide stop band rejection is a good solution. The design of the wave beam reconfigurable filter antenna by utilizing the microstrip antenna has great research significance.

The prior art is investigated and known, and the details are as follows:

professor Xun Gong et al propose a microstrip beam reconfigurable antenna by changing the coupling between the parasitic patch and the driven patch using varactors. Parasitic patches are arranged on two sides of the H surface of the driving antenna, the parasitic patches are coupled between the driving patches through variable capacitance diodes, and tuning branches are added at coupling gaps of the parasitic patches to compensate impedance characteristics.

Ahmed a. kishk et al propose that the method of loading the electrically controlled impedance element with the above-mentioned monopole is applied to a dielectric resonator antenna. The variable capacitance diode is loaded at the feed line outlet of the dielectric resonant antenna, and the impedance characteristic of a feed line end is changed by changing the capacitance value of the variable capacitance diode, so that the dielectric resonant beam reconfigurable antenna is realized.

Generally, in the existing work, there are many researches on beam reconfigurable antennas, but many design methods are realized by using methods such as a phase feed network, which easily causes energy loss, and the design is relatively complex, or the beam reconfigurable antenna is realized by using an electric tuning mode to realize impedance transformation, but the beam angle change range is relatively small. And most designs do not have a filtering function. Therefore, it is of great significance to design a simple wide stopband rejection filter antenna with reconfigurable beams.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a wide stop band rejection filter antenna with a reconfigurable wave beam, the working frequency of the antenna is 2.4GHz, the wave beam scanning direction range of +/-45 degrees can be realized by adjusting the capacitance value of a varactor, and in the whole adjusting process, the reflection coefficient S is₁₁Substantially remaining unchanged at-10 dB. In addition, the antenna realizes the frequency range of suppressing the out-of-band gain below-10 dBi to be more than 4 multiplied frequencies. The whole antenna has simple and compact structure, convenient processing and low cost.

In order to achieve the purpose, the technical scheme provided by the invention is as follows: a wave beam reconfigurable wide stop band rejection filter antenna comprises a first dielectric plate, a second dielectric plate, a first voltage control module and a second voltage control module; the second dielectric plate is positioned above the first dielectric plate, and an air layer is arranged between the first dielectric plate and the second dielectric plate; a copper-clad layer is formed on the upper surface of the second dielectric plate, and a rectangular patch, a first parasitic patch, a second parasitic patch, a third parasitic patch, a fourth parasitic patch, a first varactor diode, a second varactor diode, a first patch inductor, a second patch inductor, a third patch inductor, a fourth patch inductor, a first voltage control interface, a second voltage control interface, a third voltage control interface and a fourth voltage control interface are respectively arranged on the copper-clad layer; the rectangular patch is used as a main radiation source and is arranged in the middle of the copper-clad layer; the first parasitic patch and the second parasitic patch are connected through the first variable capacitance diode to form a parasitic unit, are symmetrical relative to the first variable capacitance diode and are positioned on one side of the rectangular patch, the third parasitic patch and the fourth parasitic patch are connected through the second variable capacitance diode to form a parasitic unit, are symmetrical relative to the second variable capacitance diode and are positioned on the other side of the rectangular patch, the two parasitic units and the rectangular patch share the same symmetry axis, namely the centers of the first variable capacitance diode and the second variable capacitance diode and the center of the rectangular patch are on the same straight line, and the current distribution generated by the two parasitic units is different by adjusting the capacitance values of the two variable capacitance diodes, so that the control of the beam direction is realized; the first parasitic patch is connected with the first voltage control interface through a first patch inductor, the second parasitic patch is connected with the second voltage control interface through a second patch inductor, the first voltage control interface and the second voltage control interface are respectively connected with the first voltage control module, the third parasitic patch is connected with the third voltage control interface through a third patch inductor, the fourth parasitic patch is connected with the fourth voltage control interface through a fourth patch inductor, and the third voltage control interface and the fourth voltage control interface are respectively connected with the second voltage control module, wherein the patch inductor is used for preventing the current of the parasitic patch from entering the voltage control module through the voltage control interface; the lower surface of the first dielectric plate is provided with a copper-clad layer, the upper surface of the first dielectric plate is provided with a ground plate, the ground plate is provided with a coupling aperture, the copper-clad layer of the first dielectric plate is respectively provided with a first half-wavelength U-shaped resonator, a second half-wavelength U-shaped resonator and a coupling feeder, the copper-clad layers of the upper surface and the lower surface of the first dielectric plate are provided with an input port, the first half-wavelength U-shaped resonator is positioned beside the second half-wavelength U-shaped resonator, the second half-wavelength U-shaped resonator is positioned beside the coupling feeder, the coupling feeder is connected with the input port and can couple the energy transmitted from the input port to the second half-wavelength U-shaped resonator, the second half-wavelength U-shaped resonator couples the energy to the first half-wavelength U-shaped resonator through the coupling effect, and the first half-wavelength U-shaped resonator couples the energy to the rectangular patch through the, therefore, a third-order filtering function is realized, wherein the combination of the coupling line and the stub line between the first half-wavelength U-shaped resonator and the second half-wavelength U-shaped resonator realizes wide stop band suppression, and the combination of the coupling line and the stub line between the second half-wavelength U-shaped resonator and the coupling feeder line realizes wide stop band suppression.

Further, the first parasitic patch, the second parasitic patch, the third parasitic patch and the fourth parasitic patch are the same in size.

Further, the input port is a 50 ohm impedance matching port.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the working frequency of the antenna is 2.4GHz, and the wave beam scanning in the +/-47-degree direction can be realized by adjusting the voltage at the two ends of the variable capacitance diode.

2. The antenna of the invention can change the beam direction and simultaneously keep S in the pass band range₁₁Less than-10 dB.

3. The antenna of the invention changes the beam direction and has small gain change.

4. The antenna has the function of wide stop band inhibition, and the out-of-band inhibition reaches more than 4 times.

5. The antenna of the invention has the advantages of simple processing, light weight, low processing cost, wide working bandwidth and good application prospect.

Drawings

Fig. 1 is a perspective view of a beam reconfigurable wide stop band rejection filter antenna according to the present invention.

Fig. 2 is a side view of the beam reconfigurable wide stop band rejection filter antenna of the present invention.

Fig. 3 is a top view of the beam reconfigurable wide stop band rejection filter antenna of the present invention.

Fig. 4 is a bottom view of the beam reconfigurable wide stop band rejection filter antenna of the present invention.

FIG. 5 is a diagram of the S of the wide stopband rejection filter antenna with reconfigurable beams of the present invention₁₁And (5) a simulation result graph.

Fig. 6 is a diagram showing simulation results of beam directions of the beam reconfigurable wide stopband rejection filter antenna of the present invention.

Fig. 7 is a simulation diagram of the gain of the beam reconfigurable wide stop band rejection filter antenna of the present invention as a function of frequency.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Referring to fig. 1 to 4, the beam reconfigurable wide stop band rejection filter antenna provided in this embodiment includes a first dielectric plate 1, a second dielectric plate 2, a first voltage control module 16, and a second voltage control module 17; the second dielectric plate 2 is positioned above the first dielectric plate 1, an air layer 6 is arranged between the first dielectric plate 1 and the second dielectric plate 2, and the air layer 6 is mainly used for improving the gain of the patch antenna; a copper-clad layer 5 is formed on the upper surface of the second dielectric plate 2, and a rectangular patch 7, a first parasitic patch 8, a second parasitic patch 9, a third parasitic patch 10, a fourth parasitic patch 11, a first varactor diode C1, a second varactor diode C2, a first patch inductor L1, a second patch inductor L2, a third patch inductor L3, a fourth patch inductor L4, a first voltage control interface 12, a second voltage control interface 13, a third voltage control interface 14 and a fourth voltage control interface 15 are respectively arranged on the copper-clad layer 5; the rectangular patch 7 is used as a main radiation source and is arranged in the middle of the copper-clad layer 5; the first parasitic patch 8 and the second parasitic patch 9 are connected through a first varactor C1 to form a parasitic unit, are symmetrical about a first varactor C1 and are located on one side of the rectangular patch 7, the third parasitic patch 10 and the fourth parasitic patch 11 are connected through a second varactor C2 to form a parasitic unit, are symmetrical about a second varactor C2 and are located on the other side of the rectangular patch 7, and the two parasitic units are located on the same symmetry axis with the rectangular patch 7, that is, the centers of the first varactor C1 and the second varactor C2 and the center of the rectangular patch 7 are on the same straight line, and the current distributions generated by the two parasitic units are different by adjusting the capacitance values of the two varactors, so that the control of the beam direction is realized; the first parasitic patch 8 is connected to the first voltage control interface 12 through a first patch inductor L1, the second parasitic patch 9 is connected to the second voltage control interface 13 through a second patch inductor L2, the first voltage control interface 12 and the second voltage control interface 13 are respectively connected to the first voltage control module 16, the third parasitic patch 10 is connected to the third voltage control interface 14 through a third patch inductor L3, the fourth parasitic patch 11 is connected to the fourth voltage control interface 15 through a fourth patch inductor L4, the third voltage control interface 14 and the fourth voltage control interface 15 are respectively connected to the second voltage control module 17, wherein the patch inductors are used for blocking the current of the parasitic patches from entering the voltage control module through the voltage control interfaces; a copper-clad layer 3 is formed on the lower surface of the first dielectric plate 1, a ground plate 4 is arranged on the upper surface of the first dielectric plate 1, a coupling aperture 18 is arranged on the ground plate 4, a first half-wavelength U-shaped resonator 19, a second half-wavelength U-shaped resonator 20 and a coupling feeder 21 are respectively arranged on the copper-clad layer 3 of the first dielectric plate 1, an input port 22 is formed on the copper-clad layer 3 on the upper surface and the lower surface of the first dielectric plate 1, the first half-wavelength U-shaped resonator 19 is positioned beside the second half-wavelength U-shaped resonator 20, the second half-wavelength U-shaped resonator 20 is positioned beside the coupling feeder 21, the coupling feeder 21 is connected with the input port 22 and can couple energy transmitted from the input port 22 to the second half-wavelength U-shaped resonator 20, and the second half-wavelength U-shaped resonator 20 couples the energy to the first half-wavelength U-shaped resonator 19 through the coupling effect, the first half-wavelength U-shaped resonator 19 couples energy to the rectangular patch 7 through the coupling aperture 18 to achieve a third order filtering function, wherein the combination of the coupling line and the stub between the first half-wavelength U-shaped resonator 19 and the second half-wavelength U-shaped resonator 20 achieves a wide stop-band rejection, and the combination of the coupling line and the stub between the second half-wavelength U-shaped resonator 20 and the coupling feed line 21 achieves a wide stop-band rejection.

In the design, the dielectric constant of each of the first dielectric plate 1 and the second dielectric plate 2 is 2.55, and the loss tangent is 0.0029. The thickness of the first dielectric plate 1 is 0.8 mm, and the thickness of the second dielectric plate 2 is 1.5 mm; the thickness of the air layer 6 is 2 mm. The first parasitic patch 8, the second parasitic patch 9, the third parasitic patch 10 and the fourth parasitic patch 11 are the same size, slightly larger than a quarter wavelength of the designed frequency. The values of the first chip inductor L1, the second chip inductor L2, the third chip inductor L3 and the fourth chip inductor L4 are 270 nH. The input port 22 is a 50 ohm impedance matching port.

Referring to fig. 5, a simulation result of S11 of the beam reconfigurable wide stopband rejection filter antenna of the present embodiment is shown. From the figureIt can be seen that when varying the different capacitance values, the reflection coefficient S₁₁Substantially remaining below-10 dB over the passband.

Referring to fig. 6, a simulation result of the beam direction of the beam reconfigurable wide stopband rejection filter antenna according to the present embodiment is shown. It can be seen from the figure that different capacitance values are provided, the beam direction can be changed from 0 ° to-47 °, and since the structure is symmetrical, an angular change of ± 47 ° can be achieved.

Referring to fig. 7, a simulation result of the gain variation of the beam reconfigurable wide stop band rejection filter antenna with frequency according to the embodiment is shown, and a simulation gain curve of the designed antenna is from 2GHz to 14 GHz. It can be seen from the graph that the gain rejection at 2.6GHz-11.4GHz is below-10 dBi, more than four multiples.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.