Miniaturized h-plane omnidirectional scanning beam switchable antenna perpendicular to the antenna plane

Abstract

The invention provides a miniaturized H-plane omnidirectional scanning beam switchable antenna perpendicular to the antenna plane, which belongs to the field of electronic technology, and particularly relates to the beam switchable antenna technology with a PIN diode switch. The antenna includes: a rectangular mid-level insulating substrate with a feed input port, a patch vibrator on its upper surface, a metal ground plate on its lower surface, and four rectangular surface insulation layers that are closely attached to the upper and lower surfaces of the middle insulating substrate. The substrate and the parasitic patch on its surface, the PIN diode switch, and the bias circuit for controlling the switch. By controlling the switch to switch the 8 beam radiation directions, the omnidirectional scanning in the vertical plane is realized, and the scanning dimension of the antenna is expanded from the plane where the antenna is located to the plane perpendicular to the antenna, under two different working frequency bands It is divided into two scanning methods: coarse scanning and fine scanning, which expands the application range of the antenna and can meet the needs of different environments.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to the beam switchable antenna technology with a PIN diode switch. Background technique [0002] As more and more information content needs to be transmitted, modern communication systems have higher and higher requirements on the information transmission rate in wireless communication, but due to the existence of multipath fading, the data transmission rate decreases with the increase of signal transmission distance . Numerous studies have shown that the proper use of antennas with switchable beams is one way to solve this problem. The pattern reconfigurable antenna can change the pattern of the transmitting and receiving antennas in real time according to changes in the communication environment, thereby effectively reducing noise interference, combating multipath fading, and improving the information transmission rate. [0003] The literature "A circular disc antenna with f...

AI Technical Summary

Problems solved by technology

By switching the switch state connecting the central circular feed patch and the fan-shaped metal patch to make different element antennas work, so the antenna can realize beam switching in five directions in the plane where the antenna is located. However, due to the radiator of the antenna Due to the limitation of characteristics, the beam of the antenna on the E plane (parallel to the direction of the electric field) is relatively narrow, and the 3dB lobe width of each beam on the plane where the antenna is located is 45°. By switching these five beams, each adjacent two beams There is a gap of about 27° between them, that is, there is a scanning blind area of ​​about 135°, which cannot achieve full coverage on the plane where the antenna is located

[0004] In addition, the existing literature rarely involves scanning on the H plane (parallel to the direction of the magnetic field), how to use reconfigurable technology to expand the beam coverage of the antenna unit, realize scanning perpendicular to the plane where the antenna is located, and cover the entire plane, Reducing the size of the antenna and designing the DC biasing circuit for the PIN diode switch in the limited space requires more in-depth research

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