High-performance ultra-wide-band VHF/UHF vehicle-mounted antenna

Abstract

The invention relates to a high-performance ultra-wide-band VHF (Very high frequency)/UHF (Ultra High Frequency) vehicle-mounted antenna. The antenna comprises an antenna oscillator, a damping spring and a fixed base, wherein the antenna oscillator is connected to the fixed base through the damping spring and comprises at least two sections of radiation oscillators and at least one loading resistor; the adjacent two radiation oscillators are connected through the loading resistor to form a linear structure; and the radiation oscillator at the bottom end is connected to a cable socket in the fixed base through a transmission line. The radiation oscillators and the loading resistors are connected at intervals; an impedance converter is connected with the cable socket; the length of the radiation oscillators and the loading resistance value, as well as position variation, are adjusted to form the high-performance ultra-wide-band VHF/UHF vehicle-mounted antenna; and the impedance converter is adjusted to regulate the matching of the antenna. The high-performance ultra-wide-band VHF/UHF antenna has the advantages of simple structure, convenience in manufacture, high precision, good consistency and wide band frequency, meets the application of both the frequency hopping technique and mobile communication, and adapts to the requirements for wideband and miniaturization of a vehicle-mounted antenna.

Description

technical field [0001] The invention relates to an antenna, in particular to a high-performance ultra-wideband VHF / UHF vehicle-mounted antenna. Background technique [0002] With the development of electronic technology, especially the application of frequency hopping technology and the use of mobile communication, higher and higher requirements are put forward for the broadband and miniaturization of the antenna. In recent years, monopole antennas have been used for their light weight, small size, simple structure, good omnidirectional characteristics and low cost. [0003] The Chinese Patent Publication No. CN 201060940Y discloses a VHF vehicle-mounted broadband whip antenna. The antenna vibrator is 1.8 meters long and is covered with a glass fiber reinforced plastic cylinder. It is mechanically connected to the seat body through an olive-shaped spring, and the seat body is fixed on the car body through the chassis. Above, the base is equipped with a broadband impedan...

AI Technical Summary

Problems solved by technology

However, the height of this type of antenna is 1 / 4 of the wavelength of the working frequency. When the frequency is low, the antenna is too high, which is not conducive to use on mobile communication carriers, and the bandwidth of the antenna often does not meet the requirements; another type of antenna Although the bandwidth of biconical antennas and dish cone antennas can meet certain conditions of use, their size is too large at the low frequency end, which limits their scope of application.

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