阅读说明：本技术 一种集成反射阵的可重构平面反射阵天线 (Reconfigurable planar reflective array antenna of integrated reflective array ) 是由 郑雨阳 汪伟 周骏 张正宇 郑生华 陈�田 张世彬 彭立军 黄永华 李家干 刘晨 于 2019-09-27 设计创作，主要内容包括：本发明一种集成反射阵的可重构平面反射阵天线,所述天线包括：平面反射阵天线和相控阵天线,其中,所述平面反射阵天线包括：金属背板和反射单元,其中,若干个所述反射单元阵列设置于所述金属背板朝向所述相控阵天线的平面上；每一个反射单元均通过MEMS开关连接到天线控制器上以使天线控制器通过控制所述MEMS开关的通断进而控制反射单元是否接通,且所述反射单元对相控阵天线辐射的电磁信号进行相位补偿；所述相控阵天线的相位中心与所述平面反射阵天线的焦点重合。应用本发明实施例,可以为前端提供复合特性的可重构高增益天线。(The invention relates to a reconfigurable planar reflective array antenna of an integrated reflective array, which comprises: planar reflective array antenna and phased array antenna, wherein, planar reflective array antenna includes: the array antenna comprises a metal back plate and reflecting units, wherein a plurality of reflecting unit arrays are arranged on the plane of the metal back plate facing the phased array antenna; each reflection unit is connected to the antenna controller through an MEMS switch so that the antenna controller controls the reflection unit to be switched on or off by controlling the on-off of the MEMS switch, and the reflection unit performs phase compensation on electromagnetic signals radiated by the phased array antenna; and the phase center of the phased array antenna is superposed with the focus of the planar reflection array antenna. By applying the embodiment of the invention, the reconfigurable high-gain antenna with composite characteristics can be provided for the front end.)

1. A reconfigurable planar reflective array antenna incorporating a reflective array, the antenna comprising: planar reflective array antennas and phased array antennas, wherein,

the phased array antenna comprises a plurality of radiating units arranged in an array, and the phase center of the phased array antenna is superposed with the focus of the planar reflection array antenna;

the planar reflective array antenna includes: the array antenna comprises a metal back plate and reflecting units, wherein a plurality of reflecting unit arrays are arranged on the plane of the metal back plate facing the phased array antenna;

each reflection unit is connected to the antenna controller through the MEMS switch so that the antenna controller controls the reflection unit to be switched on or off by controlling the on-off of the MEMS switch, and the reflection unit performs phase compensation on electromagnetic signals radiated by the phased array antenna.

2. The reconfigurable planar reflective array antenna of claim 1, wherein a dielectric layer is further disposed on a plane of the planar reflective array antenna facing the phased array antenna;

the reflecting unit is fixed on the dielectric layer.

3. The reconfigurable planar reflective array antenna of claim 2, wherein the reflective elements are disposed conformal to the dielectric layer.

4. The reconfigurable planar reflective array antenna of claim 1, wherein the radiating element array is disposed at a focus of the parabolic cylindrical reflective array for bias feeding; and the focal length of the parabolic cylinder reflection array is greater than the working wavelength of the phased array antenna.

5. The reconfigurable planar reflective array antenna of claim 1, wherein the center-to-center distances between the reflective units are as follows: 0.5 lambda < S < lambda, wherein,

s is the center distance between the reflecting units; and lambda is the working wavelength of the reconfigurable planar reflective array antenna.

6. The reconfigurable planar reflective array antenna of any one of claims 1 to 5, wherein the formula for calculating the phase compensation value of the reflective unit comprises:

Φ＝k₀(R_n-x_nsinθ_r)+Φ₀wherein, in the step (A),

phi is a phase compensation value of the reflection unit; k is a radical of₀Is the electromagnetic wave propagation constant of free space; r_nIs the distance x from the phase center of the radiation unit array to the n-th reflection unit_nThe distance from the nth reflecting unit to the central reference unit in the array; theta_rThe reflection angle of the reflected electromagnetic wave relative to the tangent of the parabolic cylinder; phi₀Is the reference phase.

7. The reconfigurable planar reflective array antenna of claim 6, wherein the reflective unit has a low-profile structure and comprises: one or a combination of reflection units with the same size and different rotation angles, an open gap rectangular open-loop reflection unit and a square cross-shaped groove reflection unit.

8. The reconfigurable planar reflective array antenna of claim 6, wherein the radiating element comprises: one or a combination of dipoles, microstrip patches, coupling laminated patches, rectangular waveguides and circular horns.

Technical Field

The invention relates to an antenna, in particular to a reconfigurable planar reflective array antenna integrated with a reflective array.

Background

One of the important directions in the development of modern integrated communication systems is: high capacity, multiple functions and intellectualization. Obviously, by improving the system capacity, increasing the system function and optimizing the system algorithm, on the one hand, the ever-expanding practical requirements can be met.

At present, the patent document with the application number of CN201410033925.6 discloses a reflection array antenna beam scanning antenna based on a rotating phase shift surface technology, and the invention designs a reflection array beam scanning antenna based on a rotating phase shift surface technology, which comprises a radiation unit antenna and a reflection array panel; the reflection array flat plate comprises a polarization beam microstrip reflection array layer and a high-transmittance phase shift surface layer; the bias wave beam micro-strip reflection array layer is a micro-strip reflection array flat plate capable of realizing wave beam deflection of the radiation unit, and the high-transmittance phase shift surface layer is a phase shift surface flat plate capable of realizing plane wave beam deflection; the two are stacked and assembled into a reflection array flat plate at certain air intervals; the radiation unit antenna adopts a positive feed type; the antenna beam scanning can be realized by respectively rotating the two layers by taking the central axis of the reflecting array flat plate as an axis. The invention has simple structure, easy manufacture, response to any polarized electromagnetic wave, suitability for transmitting and receiving any polarized electromagnetic wave and high power bearing capacity.

Therefore, most of researches on the traditional directional diagram reconfigurable antenna are to realize the functions of the existing antenna again, and the traditional directional diagram reconfigurable antenna is an antenna with only a single function. Therefore, a multifunctional miniaturized integrated communication system designed for different communication application scenarios provides a reconfigurable high-gain antenna with composite characteristics for the front end of the system, which is a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to solve the technical problem of how to provide a reconfigurable planar reflective array antenna integrated with a reflective array so as to solve the technical problem of how to provide a reconfigurable high-gain antenna with composite characteristics for a front end in the prior art.

The invention solves the technical problems through the following technical means:

the embodiment of the invention provides a reconfigurable planar reflective array antenna of an integrated reflective array, which comprises: planar reflective array antennas and phased array antennas, wherein,

the phased array antenna comprises a plurality of radiating units arranged in an array, and the phase center of the phased array antenna is superposed with the focus of the planar reflection array antenna;

the planar reflective array antenna includes: the array antenna comprises a metal back plate and reflecting units, wherein a plurality of reflecting unit arrays are arranged on the plane of the metal back plate facing the phased array antenna;

each reflection unit is connected to the antenna controller through the MEMS switch so that the antenna controller controls the reflection unit to be switched on or off by controlling the on-off of the MEMS switch, and the reflection unit performs phase compensation on electromagnetic signals radiated by the phased array antenna.

By applying the embodiment of the invention, the reflecting unit is arranged on the planar reflective array antenna, the MEMS switch is switched off when the main direction wave beam needs to be transmitted or received, the wave beam with weaker directionality is formed at the aperture surface, and the MEMS switch is switched on when the specific direction wave beam needs to be transmitted or received, so that the reflecting unit can implement the equal-phase radiation at the aperture after carrying out phase compensation on the wave beam, and compared with the planar reflective array high-gain antenna in the prior art, the equal-phase radiation at the aperture can be implemented on the basis of keeping the traditional function of the planar reflective array high-gain antenna in the prior art, and the function of the planar reflective array high-gain antenna is expanded.

Optionally, a dielectric layer is further disposed on a plane of the planar reflective array antenna facing the phased array antenna;

the reflecting unit is fixed on the dielectric layer.

Optionally, the reflection unit is disposed conformal to the dielectric layer.

Optionally, the radiation element array is disposed at a focus of the parabolic cylinder reflective array for bias feeding; and the focal length of the parabolic cylinder reflection array is greater than the working wavelength of the phased array antenna.

Optionally, the radiation mode of the radiation unit array includes:

and forming a constant phase plane at the aperture position of the beam radiated by the radiation unit by the constant-amplitude and same-phase radiation of the planar reflective array antenna.

Optionally, the center distance between the reflection units is: 0.5 lambda < S < lambda, wherein,

s is the center distance between the reflecting units; and lambda is the working wavelength of the reconfigurable planar reflective array antenna.

Optionally, the calculation formula of the phase compensation value of the reflection unit includes:

Φ＝k₀(R_n-x_nsinθ_r)+Φ₀wherein, in the step (A),

phi is a phase compensation value of the reflection unit; k is a radical of₀Is the electromagnetic wave propagation constant of free space; r_nIs the distance x from the phase center of the radiation unit array to the n-th reflection unit_nFor the nth reflection in the arrayCell to center reference cell distance; theta_rThe reflection angle of the reflected electromagnetic wave relative to the tangent of the parabolic cylinder; phi₀Is the reference phase.

Optionally, the reflection unit has a low-profile structure, and includes: one or a combination of reflection units with the same size and different rotation angles, an open gap rectangular open-loop reflection unit and a square cross-shaped groove reflection unit.

Optionally, the radiation unit includes: one or a combination of dipoles, microstrip patches, coupling laminated patches, rectangular waveguides and circular horns.

The invention has the advantages that:

by applying the embodiment of the invention, the reflecting unit is arranged on the planar reflective array antenna, the MEMS switch is switched off when the main direction wave beam needs to be transmitted or received, the wave beam with weaker directionality is formed at the aperture surface, and the MEMS switch is switched on when the specific direction wave beam needs to be transmitted or received, so that the reflecting unit can perform phase compensation on the wave beam and then realize equal-phase radiation at the aperture.

Drawings

Fig. 1 is a schematic distribution diagram of reflection units in a reconfigurable planar reflective array antenna of an integrated reflective array according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a reconfigurable planar reflective array antenna integrated with a reflective array according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a phased array antenna in a reconfigurable planar reflective array antenna of an integrated reflective array according to an embodiment of the present invention

Fig. 4 is a schematic diagram illustrating a working principle of an integrated reflective array in the case of an open MEMS switch in a reconfigurable planar reflective array antenna according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a working principle when an MEMS switch in a reconfigurable planar reflective array antenna of an integrated reflective array is turned on according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.