Method for manufacturing Archimedes helical antenna

Abstract

The invention discloses a method for manufacturing an Archimedes helical antenna. By means of integrated design of an index helical antenna and a sine wave meander Archimedes helical antenna and impedance conversion characteristics of the index helical antenna, high input resistance of the Archimedes helical antenna is decreased to 50 omega, the electrical length of an antenna arm can be increased by means of the meander Archimedes helical antenna, and miniaturization is achieved. When the impedance conversion ratio of two ends of a Balun of a microstrip line with indexes gradually changing is close to one, conversion between an unbalanced mode and a balanced mode can be achieved in a super broadband with a short length. A back cavity with a profile depth the same as the length of the Balun is adopted to acquire single-way radiation. By means of the method, the antenna can work within the frequency band range from 0.8GHz to 9.4GHz, the profile depth is 10mm, the aperture is 100mmm, and the aperture area is decreased by 78.62 percent compared with the traditional Archimedes helical antenna working in the same frequency band.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a manufacturing method of an Archimedes spiral antenna, in particular to a manufacturing method of an ultra-low profile small-sized broadband Archimedes spiral antenna. Background technique [0002] With the application of ultra-wideband systems in the field of communication, planar helical antennas have received more and more attention. Due to the more compact winding within a certain radius range, the Archimedes helical antenna has better feeding performance, circular polarization performance and beam symmetry at the low frequency end. With the compactness requirements of modern communication systems for their radiating terminals, the miniaturization of Archimedean helical antennas has also been extensively studied. The miniaturization of the Archimedes spiral antenna should include two parts: one is the miniaturization of the antenna aperture, and the other is the miniaturizat...

AI Technical Summary

Problems solved by technology

In terms of caliber miniaturization: in the prior art, it is proposed that the square wave meander arm realizes the caliber miniaturization of the Archimedes spiral antenna, and realizes the caliber reduction through the loading of inductance and capacitance. This method is difficult to realize, and other technologies are adopted in The end of the antenna arm is loaded with resistors or absorbing materials to improve low-frequency characteristics and achieve miniaturization. This method increases the heat loss of radiated energy and reduces the radiation efficiency; in terms of profile miniaturization: ferrite is often used as a reflector to reduce the antenna profile. Some people also use EBG electronic bandgap to achieve low profile design, which is complicated to design

The methods in the prior art do not consider the influence of the feed structure length on the antenna profile, so that the low-profile design of the antenna is limited in application

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