Millimeter wave circularly polarized microstrip array antenna with wide axial ratio bandwidth

A technology of axial ratio bandwidth and microstrip array, which is applied to antennas, antenna arrays, antenna grounding devices, etc., can solve problems such as narrow antenna axes, and achieve the effects of increasing gain, improving radiation performance, and high radiation gain

Active Publication Date: 2021-01-01
ZHEJIANG LAB
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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a millimeter-wave circularly polarized microstrip array antenna with a wide axial ratio bandwidth to solve the problem of the existing millimeter-wave linear array circular The problem of narrow axis of polarized microstrip array antenna

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  • Millimeter wave circularly polarized microstrip array antenna with wide axial ratio bandwidth
  • Millimeter wave circularly polarized microstrip array antenna with wide axial ratio bandwidth
  • Millimeter wave circularly polarized microstrip array antenna with wide axial ratio bandwidth

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Embodiment Construction

[0034] The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0035] Such as figure 1 , figure 2 with image 3 As shown, this embodiment provides a millimeter-wave circularly polarized microstrip array antenna with a wide axial ratio and bandwidth, which is a single-layer double-panel, including: eight antenna radiation units on the upper layer and feeds for the eight antenna radiation units. Electric one-to-eight microstrip feed network A, the middle layer microwave dielectric substrate B and the bottom metal floor C;

[0036] Wherein said eight antenna radiating units are linearly arranged, the spacing between adjacent antenna units is equal, the latter un...

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Abstract

The invention discloses a millimeter wave circularly polarized microstrip array antenna with a wide axial ratio bandwidth. The microstrip array antenna comprises eight antenna radiation units, an eight-in-one feed network, a microwave dielectric substrate and a floor. The eight antenna radiation units are the same in size and are linearly arranged at equal intervals. The latter one of the first tofourth antenna radiation units is the former one and rotates 90 degrees clockwise, and the fifth to eighth antenna radiation units and the first to fourth antenna radiation units are rotationally symmetrical about the center of the fourth antenna radiation unit and the fifth antenna radiation unit. The antenna array adopts sequential rotary feeding, a feeding network is compact in design, the space among array elements is fully utilized for design, and the phase difference of feeding ports of adjacent radiating elements is 90 degrees. The designed antenna has the advantages of low profile, the high gain, the wide axial ratio and easy array formation, and has a wide application prospect in the fields of millimeter wave radar, communication and the like.

Description

technical field [0001] The invention relates to a circularly polarized array antenna suitable for a millimeter-wave radar system, in particular to a millimeter-wave circularly polarized microstrip array antenna with a wide axial ratio and bandwidth. Background technique [0002] Millimeter-wave radar works in the millimeter-wave frequency band and has developed rapidly in the past few years. A number of millimeter-wave radar start-up companies have emerged. As a key component of millimeter-wave radar, antennas play a decisive role in the performance of millimeter-wave radar. Due to factors such as space and cost, millimeter-wave radars often use microstrip patches as antenna radiation units. The antennas of millimeter-wave radars currently on the market are basically linearly polarized microstrip antennas. [0003] Compared with linearly polarized antennas, circularly polarized antennas can effectively suppress the interference of rain and fog and resist multipath reflectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q1/36H01Q1/48H01Q1/50
CPCH01Q21/00H01Q1/36H01Q1/50H01Q1/48
Inventor 胡友建邓庆文应小俊沈思逸徐志伟
Owner ZHEJIANG LAB
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