Cage-shaped center-fed broadband antenna

Abstract

The invention provides a cage-shaped center-fed broadband antenna, which comprises an antenna top cover, a radome, a cable and an interface socket, wherein the antenna top cover is fixedly connected with the top of the radome; an antenna radiator is arranged in the radome; the antenna radiator consists of an upper radiator positioned inside the upper part of the radome and a lower radiator positioned inside the lower part of the radome; the upper radiator and the lower radiator are connected together through an intermediate connection body; the middle part of the antenna radiator is reinforced through a middle support; the top of the upper radiator and the bottom of the lower radiator are both provided with antenna-supporting covers; one end of the cable is connected with the top of the lower radiator, and the other end of the cable is connected with the interface socket; and the interface socket is fixed at the bottom of the radome. As the antenna adopts a broadband oscillator as the antenna radiator, moves up feed points, is provided with the middle support, and is integrally sealed, the antenna suffers less influence of antenna carriers or surrounding environment, is strong in aseismic anti-impact performance, and can be widely applied to mobile short / ultrashort-wave communication of vehicles, naval vessels and the like.

Description

technical field [0001] The invention relates to a cage-shaped center-fed broadband antenna for short-wave and ultra-short-wave communication, which belongs to the field of communication. Background technique [0002] At present, with the advancement of broadband communication equipment, the broadband technology of antennas is also constantly developing. Generally, the operating bandwidth of an antenna refers to the frequency range when the main electrical performance indicators of the antenna, such as input impedance, gain, main lobe width, side lobe level, and polarization characteristics, meet the design requirements. Before the 1950s, the bandwidth of the antenna generally did not exceed 2:1. After the 1950s, especially the concept of the so-called frequency-independent antenna proposed by Rumsey in 1957, and the subsequent planar equiangular helical antenna and The emergence of the logarithmic periodic structure antenna extends the bandwidth of the antenna to 40:1 or wi...

AI Technical Summary

Problems solved by technology

[0006] For the bottom-fed antenna, the input impedance and radiation performance of the antenna will be affected due to changes in the environment (such as the quality of the ground when the antenna is working, changes in the relative position of the carrier, etc.), making the matching work difficult

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