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Radio frequency switch-based electric scanning plane reflective array antenna unit

A planar reflectarray and radio frequency switch technology, which is applied in the direction of antennas, electrical components, radiation components, etc., to achieve good broadband performance and smooth phase changes

Inactive Publication Date: 2017-11-28
BEIJING INST OF SPACECRAFT SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there is no planar reflectarray antenna related technology that controls the phase shift of the reflective unit to realize electrical scanning

Method used

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  • Radio frequency switch-based electric scanning plane reflective array antenna unit
  • Radio frequency switch-based electric scanning plane reflective array antenna unit
  • Radio frequency switch-based electric scanning plane reflective array antenna unit

Examples

Experimental program
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Effect test

Embodiment 1

[0027] An electronically scanning planar reflectarray antenna unit based on a radio frequency switch, mainly composed of a patch layer, a dielectric layer and a grounding layer; wherein the patch layer includes a metal patch and at least one radio frequency switch, and the metal patch The slice is composed of an outer ring patch and a central patch, and the radio frequency switch is connected between the outer ring patch and the central patch.

[0028] According to the present invention, the outer ring patch and the central patch are square rings, and the outer length of the outer ring patch does not exceed the side length of the medium layer. At the same time, the outer ring patch can also be a square ring, and the central patch can be a square. The outer length of the outer ring patch does not exceed the side length of the dielectric layer; an annular gap is formed between the outer ring patch and the central patch, and the radio frequency switches are arranged between the an...

Embodiment 2

[0032] Such as figure 1 As shown, a schematic diagram of an electrically scanning planar reflectarray antenna unit based on a radio frequency switch, including a radio frequency switch 1 , an upper patch 2 , an upper dielectric 3 , a lower dielectric 4 and a ground plate 5 . Among them, 5 RF switches are used, and the unit is designed to work at 14GHz. The unit is a square with a side length equal to 0.5λ 0 ,λ 0 is the wavelength in free space. The thickness of the upper layer of the patch is 0.762mm, and the relative dielectric constant is 3.66; the thickness of the lower layer of the patch is 2mm, and the relative dielectric constant is 1.05; the bottom layer is the grounding plate.

[0033] figure 2 A top view of the antenna unit is shown, 5 radio frequency switches are installed between two square rings of the upper patch 2, and the 5 switches are distributed at unequal intervals.

[0034] image 3 The graph shows the relationship between the switching state of the u...

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Abstract

The invention provides a radio frequency switch-based electric scanning plane reflective array antenna unit. The antenna unit is characterized by mainly comprising a patch layer, a dielectric layer and a grounding plate layer, wherein the patch layer comprises a metal patch and at least one radio frequency switch; the metal patch consists of an outer annular patch and a central patch; and the radio frequency switch is connected between the outer annular patch and the central patch. According to the antenna unit, phase shifting of the unit can be realized through on-off of the radio frequency switch, so that the antenna units can be arranged based on a certain sequence to form an array to realize wave beam electric scanning.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to an electronic scanning planar reflection array antenna unit based on a radio frequency switch. Background technique [0002] Phased array antennas with beam scanning capability have been applied in high-orbit satellite data communications. However, its high cost, high loss, high weight and high complexity limit some applications. In contrast, the planar reflectarray antenna that can be electronically scanned with a radio frequency switch has great advantages in terms of weight, power consumption and cost compared with the general spaceborne phased array antenna, and it simplifies the phased array antenna. The structure does not require complex feed network and high-cost T / R module, only low-loss phase shift unit is needed, which makes the planar reflectarray antenna with electronic scanning capability widely used in deep space exploration, satellite commun...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q3/34
CPCH01Q1/38H01Q3/34
Inventor 马炳周怀安齐哲徐明明蔺祥宇
Owner BEIJING INST OF SPACECRAFT SYST ENG
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