阅读说明：本技术 一种集成反射阵的可重构抛物面天线 (Reconfigurable parabolic antenna of integrated reflection array ) 是由 郑雨阳 汪伟 周骏 张正宇 赵靓 赵忠超 郑生华 王昕� 陈明 黄永华 刘晨晨 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抛物面天线,所述天线包括：抛物面天线和相控阵天线,其中,所述抛物面天线包括：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抛物面天线的焦点重合。应用本发明实施例,提高了抛物面高增益天线的适应性。(The invention relates to a reconfigurable parabolic antenna integrated with a reflective array, which comprises: a parabolic dish antenna and a phased array antenna, wherein the parabolic dish antenna comprises: 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; the phase center of the phased array antenna coincides with the focal point of the parabolic antenna. By applying the embodiment of the invention, the adaptability of the parabolic high-gain antenna is improved.)

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

The parabolic 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;

The phase center of the phased array antenna coincides with the focal point of the parabolic antenna.

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

the reflecting unit is fixed on the dielectric layer.

3. The reconfigurable parabolic antenna of claim 2, wherein the reflection unit is disposed conformal to the dielectric layer.

4. The reconfigurable parabolic antenna of the integrated reflective array according to claim 1, wherein the phased array antenna is arranged on 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 parabolic antenna of claim 1, wherein the phased array antenna radiates according to a pattern comprising:

And forming a beam radiated by the feed source into an equiphase plane at the caliber by the equiphase and in-phase radiation of the parabolic antenna.

6. The reconfigurable parabolic antenna of the integrated reflection array according to claim 1, wherein the center-to-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 parabolic antenna.

7. The reconfigurable parabolic antenna of an integrated reflective array according to any one of claims 1 to 6, wherein the formula for calculating the phase compensation value of the reflection 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 phased array antenna to the nth reflecting element_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.

8. The reconfigurable parabolic antenna of claim 7, wherein the reflection 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.

9. The reconfigurable parabolic antenna of claim 7, 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 parabolic 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.

Currently, widely used conventional high gain antennas are phased array antennas and parabolic antennas. Phased array antennas have been successfully used in many advanced applications due to their versatile radiation characteristics, low profile structure, and the ability to be fabricated by precision photolithographic etching fabrication techniques. With the integration of phase shifters and transmit/receive (T/R) modules, phased arrays also perform well in fast beam scanning, beam forming and multi-beam applications. However, the antenna feed system of the phased array antenna is complex, and the space between the array elements is large, so that the occupied space is large. Generally, the higher the working frequency of a phased array antenna is, the more expensive components such as a phase shifter in an antenna feed system are, the system cost is increased in a geometric index manner, and the working performance of the system is greatly limited due to the fact that the performance of the feed system is accompanied by a nonlinear phenomenon which changes with the working environment and the like. Compared with a phased array antenna with low cost, the cost of the high-gain parabolic antenna is generally lower by one order of magnitude, and the high-gain parabolic antenna is often the preferred antenna for high-speed and long-distance communication scenes due to good radiation efficiency and mature design and analysis methods. However, the traditional parabolic antenna can only realize fixed single-beam coverage, and has a single application scene and weak anti-interference performance.

therefore, a single type of traditional high-gain antenna is difficult to adapt to the requirements of modern communication systems such as multifunction, intelligence, low cost, integration and the like, and therefore the technical problem that the adaptability of the traditional high-gain parabolic antenna is poor exists in the prior art.

Disclosure of Invention

the invention aims to provide a reconfigurable parabolic antenna integrated with a reflection array, so as to solve the technical problem that the traditional high-gain parabolic antenna in the prior art is poor in adaptability.

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

The embodiment of the invention provides a reconfigurable parabolic antenna integrated with a reflective array, which comprises: parabolic antennas and phased array antennas, wherein,

The parabolic 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;

The phase center of the phased array antenna coincides with the focal point of the parabolic antenna.

By applying the embodiment of the invention, the reflecting unit is arranged on the parabolic 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, compared with the parabolic high-gain antenna in the prior art, the equal-phase radiation at the aperture can be realized on the basis of keeping the traditional function of the parabolic high-gain antenna, the function of the parabolic high-gain antenna is expanded, and the adaptability of the parabolic high-gain antenna is further improved.

optionally, a dielectric layer is further disposed on a plane of the parabolic 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 phased array antenna is disposed at a focus of the parabolic cylinder reflector 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 phased array antenna includes:

and forming a beam radiated by the feed source into an equiphase plane at the caliber by the equiphase and in-phase radiation of the parabolic 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 parabolic 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 phased array antenna to the nth reflecting element_nThe distance from the nth reflecting unit to the central reference unit in the array;θ_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 parabolic 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, compared with the parabolic high-gain antenna in the prior art, the equal-phase radiation at the aperture can be realized on the basis of keeping the traditional function of the parabolic high-gain antenna, the function of the parabolic high-gain antenna is expanded, and the adaptability of the parabolic high-gain antenna is further improved.

Drawings

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

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

Fig. 3 is a schematic diagram illustrating an operating principle of an integrated reflective array reconfigurable parabolic antenna according to an embodiment of the present invention when an MEMS switch is turned off;

fig. 4 is a schematic diagram of an operating principle of an integrated reflective array reconfigurable parabolic antenna when an MEMS switch 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.