Circularly Polarized Scanning Array Antenna Based on Rotman Lens

A Rotman lens and array antenna technology, applied in the field of antennas, can solve the problems of narrow beam width of antenna unit axis and difficulty in realizing large-angle circularly polarized beam scanning, etc.

Active Publication Date: 2021-08-17
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the axis of the antenna unit in the array is narrower than the beam width, and it is difficult to realize large-angle circularly polarized beam scanning

Method used

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  • Circularly Polarized Scanning Array Antenna Based on Rotman Lens
  • Circularly Polarized Scanning Array Antenna Based on Rotman Lens
  • Circularly Polarized Scanning Array Antenna Based on Rotman Lens

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] The invention is applied in the technical field of communication, such as vehicle-mounted satellite communication and the like. The overall antenna is a planar structure, which is convenient to conform to the carrier. Different wave ports of the Rotman lens correspond to different beam points, and the beam points can be switched by switching the feed port of the Rotman lens.

[0045] Such as Figure 1 to Figure 4 As shown, a circularly polarized scanning array antenna based on a Rotman lens pro...

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Abstract

The invention provides a circularly polarized scanning array antenna based on a Rotman lens, which includes: a phase shifting network layer, a feeding network layer and an antenna array layer. The phase shift network layer includes: a feed SMA connector 10 and a Rotman lens network, the feed SMA connector 10 is electrically connected to the Rotman lens network; the feed network layer includes: a feed network 5 , feeding the antenna array layer; the antenna array layer includes: a plurality of patch antenna units 1 arranged in an array structure. The invention can form better circular polarization in the beam scanning direction, and realizes the circular polarization beam scanning of the array antenna.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a circularly polarized scanning array antenna based on a Rotman lens. Background technique [0002] With the rapid development of wireless communication technology, communication with mobile satellites as a common communication situation is becoming more and more common. Usually, the relative position of the satellite and the vehicles and ships communicating with it changes moment by moment, so the communication antenna is required to have beam scanning capability. At the same time, the characteristic that circularly polarized antennas can receive arbitrary polarized waves is very important for mobile satellite communications, where the location changes frequently. Circularly polarized antennas can overcome the influence of multipath effects to a certain extent. [0003] After literature search, John Huang published an article "A Technique for an Array to Generate CircularPolarization wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/00H01Q21/24
CPCH01Q21/0031H01Q21/24
Inventor 金荣洪李建平耿军平梁仙灵王堃
Owner SHANGHAI JIAO TONG UNIV
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