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Microstrip reflection unit and reflection array antenna

A technology of reflective array antenna and reflective unit, which is applied in the direction of antenna, antenna array, radiating element structure, etc., can solve the problems of difficult to achieve reflection phase range and phase error, and achieve easy engineering implementation, simple antenna structure and excellent radiation performance Effect

Active Publication Date: 2018-11-20
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the very small period of the microstrip reflector unit, the range of phase modulation parameters of the microstrip reflector unit is limited. The reflection phase range of the traditional sub-wavelength reflector unit is difficult to reach 360°, which will introduce certain The phase error of the reflectarray antenna will have a negative impact on the gain, bandwidth and other performance

Method used

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  • Microstrip reflection unit and reflection array antenna
  • Microstrip reflection unit and reflection array antenna
  • Microstrip reflection unit and reflection array antenna

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Embodiment 1

[0027] figure 1 It is a schematic side view of the structure of the microstrip reflection unit according to the embodiment of the present invention, such as figure 1 As shown, a microstrip reflection unit provided by an embodiment of the present invention includes a phase shift unit 10 , a dielectric substrate 20 and a metal floor 30 .

[0028] In an optional embodiment, the dielectric substrate 20 adopts a single-layer dielectric structure, the thickness of the single-layer dielectric is 2 mm, and the dielectric constant is 2.2.

[0029] figure 2 It is a schematic structural diagram of the phase shifting unit of the microstrip reflection unit according to the embodiment of the present invention. Such as figure 2 As shown, the phase shifting unit 10 includes a microstrip oscillator 101, a first phase delay line 102 and a second phase delay line 103; the first phase delay line 102 and the second phase delay line 103 are arranged at both ends of the microstrip oscillator 10...

Embodiment 2

[0034] Figure 4 It is a schematic diagram of the surface structure of the reflectarray antenna reflectarray based on the microstrip reflector unit according to the embodiment of the present invention, Figure 5 It is a schematic diagram of a structure model of a reflectarray antenna based on a microstrip reflector unit according to an embodiment of the present invention. Such as Figure 4 and Figure 5 As shown, a reflectarray antenna provided by the embodiment of the present invention includes a reflectarray 40 and a feed source 50, the reflectarray 40 is composed of an array of microstrip reflector units provided in Embodiment 1; the feed source 50 adopts the form of a pyramidal horn , used to transmit beams with the reflectarray 40, and the feeding mode of the feed source 50 adopts a bias feeding mode.

[0035] Such as Figure 4 As shown, the handedness of adjacent microstrip reflective units in the reflectarray 40 is opposite, so as to suppress the cross-polarization ...

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Abstract

The invention discloses a microstrip reflection unit, which comprises a phase shifting unit, a dielectric substrate and a metal floor, wherein the phase shifting unit comprises a microstrip oscillator, a first phase delay line and a second phase delay line; the first phase delay line and the second phase delay line are arranged on the two ends of the microstrip oscillator, are symmetrical relativeto the center of the microstrip oscillator, and stretch around the center of the microstrip oscillator in a clockwise or counter-clockwise direction; and the length of the first phase delay line andthe second phase delay line is changed so as to adjust the reflection phase of the microstrip reflection unit. Moreover, the invention further discloses a microstrip reflection array antenna, which comprises a reflection array and a feed source; the reflection array is constituted by an array composed of the microstrip reflection unit; the feed source adopts a pyramid horn form for transmitting wave beams with the reflection array. Compared with the prior art, the technical scheme provided by the invention alleviates the current state of small reflection phase range of the existing microstripreflection unit and can effectively improve the bandwidth and gain performance of the microstrip reflection array antenna.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a microstrip reflection unit and a reflection array antenna. Background technique [0002] The microstrip reflectarray antenna can be understood as a combination of a parabolic antenna and an array antenna. It has the air-fed structure of the parabolic antenna and the planar structure of the ordinary array antenna. Compared with parabolic antennas and traditional array antennas, its most obvious advantages are light weight, cheap price, convenient processing, low loss, high efficiency, and easy realization of beamforming and multi-beam. The above advantages make the microstrip reflectarray antenna have broad application prospects, especially in the field of aerospace. [0003] Narrow bandwidth is the most obvious shortcoming of the microstrip reflectarray antenna. In order to overcome this shortcoming, some scholars propose to use sub-wavelength technology to widen the bandwidt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q3/30H01Q21/00
CPCH01Q1/36H01Q3/30H01Q21/0006
Inventor 薛飞
Owner BEIJING INST OF RADIO MEASUREMENT