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A dual-polarized microstrip phased array antenna unit and its array

A phased-array antenna and dual-polarization technology, applied in antennas, antenna coupling, antenna components, etc., can solve the problems of lowering the minimum cut-off frequency, limiting engineering applications, and high tolerance requirements, so as to reduce the degree of impedance mismatch , Broaden the bandwidth, the effect of low profile

Active Publication Date: 2022-04-12
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially the balun structure has high tolerance requirements for design and processing, and the dual-polarized feeder is often perpendicular to the antenna, so the reliability is poor
The broadband microstrip antenna obtains ultra-wideband characteristics by extending its unit size vertically and lowering its minimum cut-off frequency, and has good beam scanning performance, but its long longitudinal size severely limits its engineering application in low-profile systems

Method used

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  • A dual-polarized microstrip phased array antenna unit and its array
  • A dual-polarized microstrip phased array antenna unit and its array
  • A dual-polarized microstrip phased array antenna unit and its array

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Embodiment Construction

[0031]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Reference herein to "one embodiment" or "an embodiment" refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom" etc. Orientation or positional relationship is only for the convenience...

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Abstract

The invention relates to a dual-polarized microstrip phased array antenna unit, which includes a radiation structure, a feed structure and a metal back cavity, the radiation structure includes a first dielectric layer and a second dielectric layer, and the parasitic veneer is arranged on the first dielectric The lower surface of the layer, the radiation patch is set on the upper surface of the second dielectric layer, the radiation patch and the parasitic patch are arranged oppositely, the feeding structure includes the third dielectric layer, the ground plate, the fourth dielectric layer, the first polarized feed The electric wire and the second polarized feeder, the ground plate is arranged between the third dielectric layer and the fourth dielectric layer, the first polarized feeder is arranged between the second dielectric layer and the third dielectric layer, and the second polarized feeder The wires are arranged on the lower surface of the fourth dielectric layer. The present invention adopts a broadband microstrip unit coupled with multi-layer patches through the antenna unit, and adds a metal back cavity under the antenna to control backward stray radiation. The phased array antenna obtained by using the above antenna unit can simultaneously achieve wide bandwidth angular scanning and high isolation High degree, low sidelobe, high front-to-back ratio and low profile.

Description

technical field [0001] The present invention relates to the technical field of antennas, in particular to a phased array antenna unit and an array thereof. Background technique [0002] One of the difficulties in the design of wide-angle scanning phased array antennas is impedance matching. When the scanning angle of the antenna array beam changes, the input impedance of the antenna will also change accordingly. If the change is too large, it will cause antenna mismatch and reduce the radiation efficiency. [0003] One of the ways to improve impedance matching is to reduce the coupling between elements. R.Xia et al proposed a decoupling network to reduce the coupling between antenna elements (R.Xia, S.Qu, P.Li, D.Yang, S.Yang and Z.Nie. "Wide-Angle Scanning Phased Array Using an Efficient Decoupling Network".IEEETransactions on Antennas and Propagation, Nov.2015, vol.63, no.11, pp.5161-5165.), achieved wide-angle impedance matching, but the antenna side lobe is high, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q1/52
CPCH01Q1/38H01Q1/50H01Q1/521
Inventor 万睿
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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