阅读说明：本技术 一种极化扭转有源角反射方向回溯系统 (Polarization torsion active angle reflection direction backtracking system ) 是由 韩居正 董士伟 樊振宏 陈如山 李正军 李小军 于 2020-04-09 设计创作，主要内容包括：本发明公开了一种极化扭转有源角反射方向回溯系统,由有源极化扭转天线阵列、第一极化选择表面和第二极化选择表面两两正交,拼接构成三面角反射器。本发明利用有源极化扭转天线阵列和极化选择表面的镜面反射,实现微波信号的方向回溯与极化扭转,以提高收发隔离；另外,利用极化扭转天线阵列的有源特性,可根据应用环境的需求,对回溯信号实现功率放大。本发明适用于雷达、微波功率传输、卫星通信等领域,具有收发隔离度高、回波功率可控等特性,并且设计过程简单,能够采用印刷电路技术进行批量生产。(The invention discloses a polarization torsion active angle reflection direction backtracking system which is formed by splicing an active polarization torsion antenna array, a first polarization selection surface and a second polarization selection surface which are orthogonal in pairs. The invention utilizes the active polarization torsion antenna array and the mirror reflection of the polarization selection surface to realize the direction backtracking and the polarization torsion of microwave signals so as to improve the receiving and transmitting isolation; in addition, by utilizing the active characteristic of the polarization torsion antenna array, the power amplification of the backtracking signal can be realized according to the requirement of an application environment. The invention is suitable for the fields of radar, microwave power transmission, satellite communication and the like, has the characteristics of high receiving and transmitting isolation degree, controllable echo power and the like, is simple in design process, and can be produced in batch by adopting a printed circuit technology.)

1. The utility model provides a polarization twists reverse active angle reflection direction system of backtracking which characterized in that, includes active polarization torsion antenna array (1), first polarization selection surface (2), second polarization selection surface (3), active polarization torsion antenna array, first polarization selection surface, second polarization selection surface two by two orthogonal placements.

2. The system according to claim 1, wherein the array of active twisted active angle reflector antennas comprises M × N active dual-polarized slot-coupled microstrip antennas arranged in a periodic manner.

3. The system according to claim 2, wherein the active dual-polarized slot-coupled microstrip antenna comprises, from top to bottom: a radiation patch, an upper dielectric layer, a metal floor, a lower dielectric layer, and a horizontal polarization feeder, a first vertical polarization feeder, a second vertical polarization feeder, a third vertical polarization feeder, a fourth vertical polarization feeder, a,λ₀A/2 connecting line, a 50 omega microstrip line and a low noise amplifier; the horizontal polarization feeder lines are symmetrical about a central axis of the active dual-polarized slot coupling microstrip antenna, and the first vertical polarization feeder line and the second vertical polarization feeder line are symmetrically arranged on two sides of the horizontal polarization feeder line; the first vertical polarization feed line and the second vertical polarization feed line pass through lambda₀2, connecting lines are connected; the horizontal polarization feeder passes through a 50 omega microstrip line and lambda₀2, connecting lines are connected; the low-noise amplifier is arranged in the middle of the 50 omega microstrip line; a horizontal polarization gap, a first vertical polarization gap and a second vertical polarization gap are arranged on the metal floor; the horizontal polarization gap is positioned right above the horizontal polarization feeder line; the first vertical polarization slot and the second vertical polarization slot are symmetrically arranged at two sides of the horizontal polarization slot and are respectively positioned right above the first vertical polarization feed line and the second vertical polarization feed line, wherein lambda is₀At the operating frequency f₀The corresponding wavelength.

4. The polarization twisted active angle reflection direction backtracking system of claim 1, wherein said first polarization selection surface comprises P × Q periodically arranged polarization selection surface elements, said polarization selection surface elements comprising a dielectric substrate and a strip-shaped metal patch disposed on the dielectric substrate.

5. The polarization twisted active angular reflection direction backtracking system of claim 4, wherein said second polarization selection surface is structurally identical to said first polarization selection surface, said first polarization selection surface strip-shaped metal patch being parallel to the x-axis and said second polarization selection surface strip-shaped metal patch being parallel to the z-axis.

Technical Field

The invention belongs to the antenna array technology, and particularly relates to a polarization torsion active angle reflection direction backtracking system.

Background

The direction backtracking array has the characteristic of automatically tracking the direction of an incoming wave without complex signal processing equipment, and has a wide application prospect in the fields of radar, wireless communication, microwave energy transmission and the like. The existing method for realizing direction backtracking mainly comprises three modes of a Van Atta array, a phase conjugation array (PON array) and an angle reflector, wherein the Van Atta array realizes phase conjugation by utilizing space conjugation, and the method has the defect that the design of an equal-length feed network is complex; the traceable angle range of the PON array is wide, but a large number of mixers and local oscillator feed networks are needed, so that the cost is high; most corner reflectors are passive systems, work in a single polarization mode, have low echo power, and cannot meet the application requirements of multiple functions, high transceiving isolation and long-distance transmission in radar, communication and wireless energy transmission systems.

Disclosure of Invention

The invention aims to provide a polarization torsion active angle reflection direction backtracking system which finishes the direction backtracking, polarization torsion and power amplification of incoming wave signals through polarization regulation and mirror reflection between an active polarization torsion antenna array and a polarization selection surface.

The technical solution for realizing the purpose of the invention is as follows: a polarization torsion active angle reflection direction backtracking system comprises an active polarization torsion antenna array, a first polarization selection surface and a second polarization selection surface, wherein the active polarization torsion antenna array, the first polarization selection surface and the second polarization selection surface are arranged in an orthogonal mode in pairs.

Further, the active polarized torsion antenna array comprises M × N active dual-polarized slot-coupled microstrip antennas arranged in a periodic manner.

Further, active dual polarization slot coupling microstrip antenna includes from last to down in proper order: the antenna comprises a radiation patch, an upper dielectric layer, a metal floor, a lower dielectric layer, a horizontal polarization feeder line, a first vertical polarization feeder line, a second vertical polarization feeder line and a lambda, wherein the horizontal polarization feeder line, the first vertical polarization feeder line, the second vertical polarization feeder line and the lambda are positioned on the lower surface of the lower dielectric layer₀A/2 connecting line, a 50 omega microstrip line and a low noise amplifier; the horizontal polarization feeder lines are symmetrical about a central axis of the active dual-polarized slot coupling microstrip antenna, and the first vertical polarization feeder line and the second vertical polarization feeder line are symmetrically arranged on two sides of the horizontal polarization feeder line; the first vertical polarization feed line and the second vertical polarization feed line pass through lambda₀2, connecting lines are connected; the horizontal polarization feeder passes through a 50 omega microstrip line and lambda₀2, connecting lines are connected; the low-noise amplifier is arranged in the middle of the 50 omega microstrip line; a horizontal polarization gap, a first vertical polarization gap and a second vertical polarization gap are arranged on the metal floor; the first vertical polarization slot and the second vertical polarization slot are symmetrically arranged at two sides of the horizontal polarization slot and are respectively positioned right above the first vertical polarization feed line and the second vertical polarization feed line, wherein lambda is₀At the operating frequency f₀The corresponding wavelength.

Compared with the prior art, the invention has the following remarkable advantages:

the invention realizes the function of direction backtracking and polarization torsion, and has high receiving and transmitting isolation;

the invention can amplify the power of the backtracking signal according to the application environment requirement;

on the premise of not changing the structure of the array surface, the invention can generate polarization torsion and direction backtracking effects on linear polarization waves with different polarization modes by adjusting the placement of each array surface;

the invention does not need to design a complex feed network and use a mixer, is easy to realize and can be produced in batch by using a printed circuit technology.

The present invention is described in further detail below with reference to the attached drawing figures.

Drawings

Fig. 1 is a schematic view of the general structure of the present invention.

Fig. 2 is a schematic structural diagram of an active dual-polarized slot-coupled microstrip antenna according to the present invention, wherein fig. 2(a) is a top view, fig. 2(b) is a side view, fig. 2(c) is a top view of a metal floor, and fig. 2(d) is a bottom view.

Fig. 3 is a schematic structural diagram of a polarization selection surface unit according to the present invention, wherein fig. 3(a) is a top view and fig. 3(b) is a side view.

Fig. 4 shows the respective directivity patterns of the present invention, in which fig. 4(a) shows the directivity pattern at an incident wave angle of 0 °, fig. 4(b) shows the directivity pattern at an incident wave angle of 30 °, fig. 4(c) shows the directivity pattern at an incident wave angle of 45 °, and fig. 4(d) shows the directivity pattern at an incident wave angle of 60 °.

Detailed Description

A polarization torsion active angle reflection direction backtracking system comprises an active polarization torsion antenna array located on a xoy plane, a first polarization selection super-surface located on a xoz plane and a second polarization selection surface located on a yoz plane, wherein the active polarization torsion antenna array, the first polarization selection super-surface and the second polarization selection super-surface are arranged in a pairwise orthogonal mode to form a three-plane corner reflector.

In a further embodiment, the active polarized torsion antenna array comprises M × N active dual-polarized slot-coupled microstrip antennas arranged in a periodic manner;

specifically, active dual polarization slot coupling microstrip antenna includes from last down in proper order: the antenna comprises a radiation patch, an upper dielectric layer, a metal floor, a lower dielectric layer, a horizontal polarization feeder line, a first vertical polarization feeder line, a second vertical polarization feeder line and a lambda, wherein the horizontal polarization feeder line, the first vertical polarization feeder line, the second vertical polarization feeder line and the lambda are positioned on the lower surface of the lower dielectric layer₀A/2 connecting line, a 50 omega microstrip line and a low noise amplifier; the horizontal polarization feeder lines are symmetrical about a central axis of the active dual-polarized slot coupling microstrip antenna, and the first vertical polarization feeder line and the second vertical polarization feeder line are symmetrically arranged on two sides of the horizontal polarization feeder line; the first vertical polarization feed line and the second vertical polarization feed line pass through lambda₀2, connecting lines are connected; the horizontal polarization feeder passes through a 50 omega microstrip line and lambda₀A/2 connecting line is connected with the first vertical polarization feeder line and the second vertical polarization gap; the low-noise amplifier is arranged in the middle of the 50 omega microstrip line; a horizontal polarization gap, a first vertical polarization gap and a second vertical polarization gap are arranged on the metal floor; the horizontal polarization gap is positioned right above the horizontal polarization feeder line; the first vertical polarization gap and the second vertical polarization gap are symmetrically arranged on the horizontal planeAnd the two sides of the polarization slot are respectively positioned right above the first vertical polarization feeder line and the second vertical polarization feeder line. Wherein λ is₀At the operating frequency f₀The corresponding wavelength.

In a further embodiment, the first polarization selecting surface comprises P × Q periodically arranged polarization selecting surface elements;

specifically, the first polarization selection surface unit sequentially comprises an upper layer of strip-shaped metal patches and a lower layer of dielectric substrate from top to bottom.

The second polarization selection surface is structurally identical to the first polarization selection surface but is positioned differently, the first polarization selection surface lying in the xoz plane with the metal strip parallel to the x-axis and the second polarization selection surface lying in the yoz plane with the metal strip parallel to the z-axis.

The working frequencies of the active polarized torsion antenna array, the first polarization selection surface and the second polarization selection surface are f₀。

The invention utilizes the active and polarization regulation and control characteristics of the antenna array and the super surface to change the backscattering power and polarization characteristics of the traditional corner reflector. The invention backtracks the orthogonal polarized wave of a certain line polarized incoming wave signal, improves the receiving and transmitting isolation (for example, if the incoming wave signal is horizontally/vertically polarized, the backtracking signal is vertically/horizontally polarized), simultaneously realizes the power amplification of the echo signal by adding an active device, has the beneficial characteristics of no need of using a large-scale connecting wire and a frequency mixing network, simple structure, batch production by adopting a printed circuit technology and the like.