Ultra-wideband miniaturized omnidirectional whip antenna

Abstract

The invention discloses an ultra wide band miniaturized omnidirectional whip antenna. The antenna comprises an engineering plastic pipe sleeve and a dustproof cap, and a steel cable, a PCB and a radiofrequency connector are sequentially arranged in the engineering plastic pipe sleeve from top to bottom. A coaxial line and a corresponding winding coil are welded on the PCB. The invention disclosesa method for increasing the bandwidth of an omnidirectional antenna. Matching elements are loaded, and a lumped loading class and a distributed loading class are included; lumped loading is mainly used for loading an LC matching circuit and a transmission line converter; according to distributed loading, the antenna is divided into a plurality of sections and connected via a matching circuit, andthus, current is uniformly distributed on the antenna by loading the matching circuit, and wideband impedance matching of the antenna is realized. According to the VHF / UHF ultra-wideband monopole antenna, after the LC matching circuit is loaded on the antenna lumped, the working bandwidth of the antenna is greatly increased, the size is small, and the requirements for broadband and portability can be met.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to an ultra-wideband miniaturized omnidirectional whip antenna. Background technique [0002] With the development of science and technology, various devices in electronic communication systems need to be miniaturized and integrated, and antennas, as an indispensable component in communication systems, also need to be miniaturized and portable. At present, a device may need to receive signals in multiple frequency bands. If a device is installed with several antennas at the same time, it will not only increase the size and weight of the device, but also require high isolation between the antennas. Therefore, it has become a requirement that an antenna can receive signals in several frequency bands at the same time, and broadband and ultra-wideband antennas can solve this problem well. [0003] Among the published results, a lot of results have been achieved in the research o...

AI Technical Summary

Problems solved by technology

[0004] The above two kinds of structures are complicated and the manufacturing cost is high. In addition, their working bandwidth cannot meet the demand of larger bandwidth.

In addition, these two methods of widening the antenna bandwidth are at the expense of the size of the antenna. In some occasions where the antenna is required to be miniaturized, there will be great limitations.

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