CN-122000698-A - Folding reflection type high-power electromagnetic super-surface system

Abstract

The invention discloses a folding reflection type high-power electromagnetic super-surface system which comprises a super-Gaussian feed source, a transmission super-surface and a reflection super-surface. The transmission super-surface is a passive super-surface transmission array and is used for carrying out phase compensation and polarization selection on electromagnetic waves in a first polarization direction and realizing high-transmissivity transmission on electromagnetic waves in a second polarization direction, and the reflection super-surface is an adjustable super-surface reflection array and is used for converting the electromagnetic waves in the first polarization direction into the second polarization direction and carrying out phase regulation and control. The ultra-high-speed feed source is embedded in the central area of the reflecting super-surface, and the transmitting super-surface and the reflecting super-surface are arranged in parallel and opposite to form a folding light path. The invention has the advantages of low profile, high power capacity, real-time phase regulation and control, low side lobe level and the like, and is suitable for high-power radar communication and satellite communication systems.

Inventors

• ZHANG HAOCHI
• ZHANG LEPENG
• ZHANG YIJIE
• Fan Die
• HE PEIHANG

Assignees

• 东南大学

Dates

Publication Date

20260508

Application Date

20260309

Claims (10)

1. 1. A folded reflective high power electromagnetic subsurface system, comprising: a super Gaussian feed source for providing high power electromagnetic wave signals; The transmission super-surface is a passive super-surface transmission array and comprises a plurality of transmission units which are periodically arranged, the interval between the transmission units is 0.4 to 0.6 times of the working wavelength, and the transmission super-surface is used for carrying out phase compensation and polarization selection on the incident electromagnetic wave in the first polarization direction and realizing high-transmittance transmission on the incident electromagnetic wave in the second polarization direction; The reflection super-surface is an adjustable super-surface reflection array and comprises a plurality of periodically arranged reflection units, the interval between the reflection units is 0.4 to 0.6 times of the working wavelength, and the reflection super-surface is used for converting electromagnetic waves in the first polarization direction into the second polarization direction and carrying out phase regulation; Wherein the ultra-high-speed feed source is embedded in the central area of the reflecting super-surface, the transmission super surface and the reflection super surface are oppositely arranged in parallel and form a folding light path, and the first polarization direction and the second polarization direction are mutually orthogonal.
2. 2. The folded reflective high power electromagnetic subsurface system according to claim 1, wherein the transmissive unit of the transmissive subsurface comprises a multilayer metal pattern layer and a dielectric substrate layer, the metal pattern layer comprising at least one of a jersey cross structure, a square ring structure, or an I-type structure, phase modulation of 0 ° to 360 ° being achieved by changing the geometry of the metal pattern layer.
3. 3. The folded reflective high power electromagnetic subsurface system according to claim 2, wherein the transmissive unit achieves 180 ° to 360 ° phase coverage by a mirror image of the structure, the mirror image being an inversion of the original structure 180 ° along the central axis.
4. 4. The folded reflective high-power electromagnetic super surface system according to claim 1, wherein the reflective unit of the reflective super surface comprises a metal patch layer, a dielectric substrate layer and a metal grounding layer, the metal patch layer is connected with the metal grounding layer through a controllable switching device, and 1-bit phase regulation is achieved by controlling the on-off state of the controllable switching device.
5. 5. The folded reflective high power electromagnetic subsurface system of claim 4, wherein the controllable switching device is a PIN diode or MEMS switch.
6. 6. The folded reflective high power electromagnetic subsurface system of claim 4, wherein the metal patch layer adopts a symmetrical split ring structure or a rotationally symmetrical structure for achieving a 90 ° polarization conversion function.
7. 7. The folded reflective high power electromagnetic subsurface system according to claim 1, wherein the distance between the transmissive subsurface and the reflective subsurface is 0.3 to 1.0 times the operating wavelength.
8. 8. The folded reflective high power electromagnetic subsurface system according to claim 1, wherein the operating frequency band of the transmissive subsurface and the reflective subsurface is the X-band, ku-band or K-band.
9. 9. The folded reflective high power electromagnetic subsurface system as claimed in claim 1, wherein the number of units of both the transmissive subsurface and the reflective subsurface is 16 x 16 to 64 x 64.
10. 10. The folded reflective high power electromagnetic subsurface system as claimed in claim 1, further comprising a control module electrically connected to the reflective subsurface for sending control signals to the reflective subsurface to perform an electrical scanning function of a beam, the electrical scanning angle ranging from ±30°.

Description

Folding reflection type high-power electromagnetic super-surface system Technical Field The invention belongs to the technical field of microwave millimeter wave antennas, and particularly relates to a high-power electromagnetic super-surface system based on a folding reflective array. Background With the rapid development of microwave wireless communication technology and microwave radar technology, the transmission array antenna is widely applied in the fields of wireless communication, satellite communication and tracking, automobile radar, imaging and the like. In the past twenty years, meta-materials and super-surfaces have been used as artificial periodic structures, and flexible regulation and control of electromagnetic wave propagation characteristics can be realized by reasonably designing geometric parameters of unit structures, so that the meta-materials and super-surfaces have been widely applied to the design of wave propagation characteristics. However, it is still difficult to achieve a very low profile for an array antenna because there is still a large space between the feed and the array antenna. In order to solve the problem, a folding transmission array antenna is designed, the overall structure of the antenna can be reduced by 2/3, but the folding reflection array antenna can only be reduced by 1/2, so that the overall height of the antenna can be reduced more effectively, and a very low profile is realized. The existing transmission arrays are all facing low-power feed sources, and the effect is greatly reduced when facing high-power feed sources, which is also a problem to be solved at present. There are various methods for implementing amplitude and phase regulation, such as adding resistors/lumped elements at the locations of the cells, or adding a multi-layer resonant type structure to implement amplitude and phase regulation. However, the loading of the resistor/lumped element and the utilization of the multilayer resonance type structure make the structure of the super surface complex, the design and the processing difficult, the resistor/lumped element and the unit cell have fixed sizes in comparison, and the adjustment is difficult, and the working bandwidth of the multilayer resonance type structure is generally narrow, so that the broadband regulation and control of electromagnetic waves are difficult to realize. Therefore, the development of the folding reflective electromagnetic super-surface system with low profile, high power capacity and real-time phase regulation and control capability has important significance for promoting the development of microwave millimeter wave antenna technology. Disclosure of Invention The invention aims to solve the technical problems of high antenna profile, low power capacity and difficult phase regulation in the prior art by providing a high-power electromagnetic super-surface system based on a folding reflective array. In order to solve the technical problems, the invention adopts the following technical scheme: The invention provides a folding reflection type high-power electromagnetic super-surface system which comprises a super-Gaussian feed source, a transmission super-surface, a reflection super-surface and a reflection super-surface, wherein the super-Gaussian feed source is used for providing high-power electromagnetic wave signals, the transmission super-surface is a passive super-surface transmission array and comprises a plurality of transmission units which are periodically arranged, the interval between the transmission units is 0.4 to 0.6 times of the working wavelength, the transmission super-surface is used for carrying out phase compensation and polarization selection on incident electromagnetic waves in a first polarization direction and realizing high-transmissivity transmission on the incident electromagnetic waves in a second polarization direction, the reflection super-surface is an adjustable super-surface reflection array and comprises a plurality of reflection units which are periodically arranged, the interval between the reflection units is 0.4 to 0.6 times of the working wavelength, the reflection super-surface is used for converting the electromagnetic waves in the first polarization direction into the second polarization direction and carrying out phase regulation, the super-Gaussian feed source is embedded in a central area which is arranged in the reflection super-surface, the transmission super-surface and the reflection super-surface is parallel and opposite to the reflection super-polarization surface to form a folding light path, and the first direction and the second direction are orthogonal mutually. Preferably, the transmission unit of the transmission super surface comprises a plurality of metal pattern layers and a dielectric substrate layer, wherein the metal pattern layers comprise at least one of a jersey cooling cross structure, a square ring structure or an I-shaped structure, and the phase re