High-gain narrow-beam antenna

Abstract

The invention relates to a high-gain narrow-beam antenna. The high-gain narrow-beam antenna comprises an insulation dielectric plate, a feed network, a metal bottom plate, four metal radiation oscillators and a director, wherein the feed network is arranged on the front surface of the insulation dielectric plate, the metal bottom plate is arranged on the back surface of the insulation dielectric plate, the four metal radiation oscillators are arranged on the front surface of the insulation dielectric plate and connected with the feed network, the director is fixed on the front surface of the insulation dielectric plate and arranged above the metal radiation oscillators in a suspension way, the feed network comprises a plurality of power dividers which are connected with one another and a phase shifter and is used for converting a signal input from an input end into four paths of signals with equal amplitudes and phase differences sequentially being 90 degrees, and the four paths of signals are respectively output to the four metal radiation oscillators. The high-gain narrow-beam antenna has the advantages of wide axial ratio bandwidth, circular polarization, high gain, narrow beam, performance stability and the like, and is easy to produce at a large scale, is suitably used for fields of warehouse logistics, industrial manufacturing, transportation, counterfeiting prevention, theft prevention and the like, and has very wide application prospect.

Description

technical field [0001] The invention relates to the field of RFID application technology, in particular to a high-gain narrow-beam antenna. Background technique [0002] Radio Frequency Identification (RFID) technology is a technology that uses radio frequency signals to automatically identify target objects and obtain relevant information. With the continuous development and maturity of RFID core technology, the application field is expanding day by day, and it has been more and more used in military, aviation, warehousing and logistics, commodity retail, industrial manufacturing, asset management, transportation, animal husbandry, anti-counterfeiting and anti-theft, etc. field. Taking the field of warehousing and logistics as an example, with the deepening of the application of RFID technology in the logistics and warehousing industry, there are more and more forklifts using RFID technology, and there are more and more types of tags that need to be identified for various ...

AI Technical Summary

Problems solved by technology

Since forklift antennas are mostly installed between the arms of forklifts, ordinary microstrip antennas in the form of RFID reader antennas cannot meet the small size requirements of such applications, and the gain of small antennas that achieve direction shifting through simple L arrays cannot Meet the requirement of high gain

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