A high-gain Yagi antenna and a preparation method thereof

Abstract

The invention provides a Yagi antenna with high gain and a preparation method thereof are provide, include metal beam rods, A plurality of passive oscillators are arranged along the longitudinal direction of the metal beam bar, the passive vibrator is perpendicular to the metal beam bar, A median line of each passive oscillator is located in that same plane as the median axis of the metal beam bar, A metal rod is insulate from that passive vibrator, A reflective unit is arranged directly below the metal beam bar, The reflecting unit is a cone bucket, the open end of the cone bucket is oppositethe metal beam bar, the backward radiation from the yagi antenna 's own active array to the reflector is already weak, Using cone basket as reflector is beneficial to improve the front-to-back ratioof yagi antenna and obviously improve the gain of antenna. Sometimes in order to increase the forward gain of yagi antenna and reduce the side lobe, rectangular or circular grid mesh or V-shaped gridbar reflector parallel to the reflector can be used.

Description

technical field [0001] The invention relates to a high-gain Yagi antenna in the field of satellite navigation and a preparation method thereof. technical background [0002] The Yagi antenna can achieve high gain. It has the advantages of simple feeding method and low cost, but its working frequency band is narrow. It is very difficult to determine the length of each vibrator only by theory. Generally, it is carried out by software simulation and intelligent optimization algorithm. Calculation, Yagi antenna is also called wave channel antenna and directional antenna. It consists of multiple passive oscillators and an active oscillator. The centers of each array are on a straight line, and there is a metal rod perpendicular to the center of each oscillator called a beam. , the metal rod should be insulated from the active oscillator, and the passive oscillator needs to be fixed on the metal rod. The active array is generally half the resonance length and fed by the coaxial ...

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Problems solved by technology

[0002] The Yagi antenna can achieve high gain. It has the advantages of simple feeding method and low cost, but its working frequency band is narrow. It is very difficult to determine the length of each vibrator only by theory. Generally, it is carried out by software simulation and intelligent optimization algorithm. Calculation, Yagi antenna is also called wave channel antenna and directional antenna. It consists of multiple passive oscillators and an active oscillator. The centers of each array are on a straight line, and there is a metal rod perpendicular to the center of each oscillator called a beam. , the metal rod should be insulated from the active oscillator, and the passive oscillator needs to be fixed on the metal rod. The active array is generally half the resonance length and fed by the coaxial line. The maximum radiation direction of the Yagi antenna is in the plane where the antenna is located. The central axis of each vibrator points to the direction leading to the element. After the active element is fed through the coaxial line, it radiates electromagnetic waves to the space. The induced current is generated in the passive vibrator, and radiation is also generated. The existing Yagi antenna has relatively low reflectivity. Poor, the model building process is cumbersome

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