Double-section impedance converter feed omnidirectional broadband dipole array antenna

Abstract

The invention discloses a double-section impedance converter feed omnidirectional broadband dipole array antenna, which comprises four dipole units, wherein the input signal end is provided with a micro-strip circuit, and input signal are divided into two parts through a micro-strip power distribution circuit; a micro-strip line is changed into printing balance double lines by adopting a micro-strip transition line; at a balanced double-line port, a printing balance double-line one-to-two circuit is acquired through a power distributor of a printing balance double-line form, and a feed network is divided into four paths of printing balance double lines to feed four dipole units; and a double-section impedance converter is arranged between the dipole unit and the balance double lines, one end of the double-section impedance converter is connected with the double-line outlet of the power distributor, and the other end of the double-section impedance converter feeds a dipole radiation unit. The ports of the four paths of balance double lines can directly feed the dipole units, so the bandwidth of the power distributor is narrow; and the double-section impedance converter for feeding the dipole units is connected behind the balanced double-line port so as to effectively increase the impedance bandwidth of the array antenna.

Description

technical field [0001] The invention relates to a printed dipole antenna, in particular to an omnidirectional broadband dipole array antenna fed by a dual-section impedance converter, which has a wide impedance bandwidth and can keep the H plane of the dipole radiation unit fully radiation characteristics. Background technique [0002] In recent years, wireless communication technology has been developed rapidly and widely used. A variety of wireless communication systems for different purposes are constantly emerging. Different communication systems generally have different operating frequencies, and have different requirements for the radiation form and gain of the antenna. It is hoped to design a low-cost, easy-to-manufacture antenna. The printed dipole antenna is a common planar antenna, and it is easier to achieve coplanarity with other microwave and radio frequency circuits. And the dipole radiation unit has the characteristic of omnidirectional radiation of H plane....

AI Technical Summary

Problems solved by technology

But the radiation gain of a single dipole element is low

Arraying the printed dipole units can obtain a higher gain than a single printed dipole, but the feed network of the array antenna produces certain radiation and will reflect the radiation pattern of the radiation unit to a certain extent, affecting the antenna's The omnidirectional radiation characteristics of the H plane, and the bandwidth limitation of the feed network may be that the impedance bandwidth of the entire array antenna is limited

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