A uhf frequency band communication antenna

Abstract

The invention discloses an UHF (Ultra high frequency) band communication antenna, and relates to the field of a basic communication system. The UHF band communication antenna comprises an antenna plate with a high dielectric constant, wherein the antenna plate adopts a PCB (Printed Circuit Board) with copper coated on dual surfaces of a porcelain substrate, an antenna radiating array is formed on a copper coating surface of the antenna plate by an engineering etching process, a feeding port of the antenna plate is connected with one end of a connection cable, the other end of the connection cable is connected with a radio frequency connection piece outside the antenna plate, a cable fixing clamp is arranged at an end part of the antenna plate and is used for fixing the connection cable, and the cable fixing clamp is arranged on the antenna plate by a cable fixing clamp installation bolt. The antenna radiation array is formed by fabricating the copper coating plate of a dual-side porcelain medium with a high dielectric constant, and by optimizing an antenna array structure, the requirements that the antenna and the cable are simply and directly connected within the UHF band and work in a wide frequency band are achieved.

Description

technical field [0001] The invention relates to the field of basic communication systems, in particular to a compactly installed UHF frequency band broadband vertically polarized dipole antenna based on a microwave ceramic substrate. Background technique [0002] At present, portable mobile platforms, airborne, vehicle-mounted, RFID, wireless WIFI and Bluetooth communication and other portable mobile platforms UHF frequency band communication antennas are mostly "J" type dipole, spiral normal mode antenna, "knife" type single dipole Sub-antenna or "whip" antenna-based. in: [0003] The "J" type dipole antenna uses the three-quarter wavelength main element as the basic radiation unit of the antenna, and introduces a quarter-wavelength matching element structure next to the main element to complete the matching between the overall system and the 50-ohm feed. According to the ordinary dipole matching mode, W.B. Freely first proposed the design of the antenna in the article "A...

AI Technical Summary

Problems solved by technology

However, the helical normal mode antenna adopts a thin-wire helical structure and works in the normal mode, so its working bandwidth is narrow (generally no more than 5%), and the processing of the helical structure and the adjustment of the feed matching require certain professional skills skills, it takes a lot of time to make the design, processing and debugging of this antenna more difficult

[0005] The "knife" type single dipole antenna or the "whip" antenna belong to the category of monopole antenna, and the physical size of the structure is generally about one-half wavelength or one-quarter wavelength. The size is difficult to meet the requirements of compact installation, portable installation or concealed installation

In addition, the working method of the monopole makes the radiation characteristics of the antenna itself closely related to the ground plane or the form and structure of the installation platform, which further restricts the use of this antenna

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