Micro-strip printed ultra-wideband log periodic antenna and antenna array

Abstract

The invention discloses a micro-strip printed ultra-wideband log periodic antenna. The antenna comprises an antenna layer micro-strip plate, a feeder line layer micro-strip plate, a metal reflection plate and a radio frequency connector; a log periodic antenna is printed on the antenna layer micro-strip plate; the antenna layer micro-strip plate is vertically mounted on the metal reflection plate;the feeder line layer micro-strip plate is adhered to one side of the antenna layer micro-strip plate; the log periodic antenna and the feeder line layer micro-strip plate are mounted on the same side; the feeder line layer micro-strip plate is in feed connection with the log periodic antenna; the radio frequency connector is connected with the bottom end of the feeder line layer micro-strip plate; and a feed point is arranged at a near-ground end. The invention further discloses an antenna array. The micro-strip printed ultra-wideband log periodic antenna has the beneficial effects that thefeed point is arranged at the near-ground end of the log periodic antenna, so that the feed problem of the micro-strip printed ultra-wideband log periodic antenna during working at a relatively high frequency is solved; traditional far-ground end feed is converted into near-ground end feed, so that the influence of feeder lines on the log periodic antenna is reduced as much as possible; and the micro-strip printed ultra-wideband log periodic antenna has relatively good electrical performance and radiation performance.

Description

technical field [0001] The invention relates to an antenna, in particular to a microstrip printed ultra-wideband logarithmic periodic antenna. Background technique [0002] With the development of radar technology, radar systems have higher and higher requirements on the performance of antennas, and the advantages of ultra-wideband antennas are highlighted. [0003] As a broadband antenna with excellent electrical characteristics, the logarithmic periodic antenna has a simple structure and is easy to process, and has stable radiation characteristics and high directivity in a wide frequency range. Communication, direction finding, search, electronic countermeasures and other aspects have been widely used. [0004] The feeding method of the traditional logarithmic periodic antenna is generally to use the coaxial line to feed, and the coaxial line is welded to the remote end of the antenna. In other words, the influence of the coaxial line cannot be ignored, and the welding a...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to solve the feeding problem of the logarithmic periodic antenna at a higher frequency

[0008] The invention feeds the logarithmic period radiation antenna through the feeder layer microstrip plate, so that the feeding point is at the near-ground end of the logarithmic period, and solves the problem of feeding the microstrip printed ultra-wideband logarithmic period antenna at a higher frequency. To solve the electrical problem, the traditional far-end feed is transformed into near-earth feed, which reduces the influence of the feeder on the logarithmic periodic antenna as much as possible; the appropriate feeder selection makes it possible for the logarithmic periodic antenna to work at high frequencies; Greatly expands the frequency range that the log-periodic antenna can work, and has better electrical performance and radiation performance

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