High-gain wideband omnidirectional antenna

Abstract

The invention provides a high-gain wideband omnidirectional antenna, which comprises a main feeder, a two-cone shaped reflector, a wideband slot antenna, a feed network and an antenna cover. The high-gain wideband omnidirectional antenna has the characteristics of: 1, bandwidth of over 110 percent, higher radiation efficiency, adoption of inconsistent slot line shaped curves and contribution to further widening the bandwidth of the antenna; 2, capacity of being arranged in a plastic bucket and an antenna cover in any shape, ideal directional diagram, capacity of covering the whole space, uniform current distribution, capacities of realizing non-blind area coverage and improving communication quality; 3, capacity of compressing beam width in a vertical plane of the omnidirectional antenna so as to improve the antenna gain due to the adoption of the two-cone shaped reflector structure, capacity of making waves transmitted by a radiating unit radiate from the plane to free space, convenience for improving polarized purity of the antenna; 4, easy implementation of dual-polarized design; and 5, simple technology, fewer welding spots, convenient design and manufacture, and contribution to improving third-order passive intermodulation of the antenna.

Description

(1) Technical field [0001] The present invention relates to an antenna used in the field of mobile communication, in particular to an antenna used in a communication network as an antenna for transmitting and receiving radio signals. (2) Background technology [0002] Radio communication equipment and electronic information equipment are developing in the direction of multi-functionalization, miniaturization, ultra-wideband and friendly coordination with the surrounding environment, which makes broadband, miniaturization and high gain become one of the hot topics of research at home and abroad. The main problems of the existing antennas are: (1) Most of the existing antennas are dipole antennas and monopole antenna arrays, and the directional patterns are equal up and down, so part of the radio waves are consumed, so the gain is relatively low. (2) At present, the antennas used by users are required to be miniaturized, and mobile antennas are required to be well installed in...

AI Technical Summary

Problems solved by technology

The main problems of existing antennas are: (1) Most of the existing antennas are dipole antennas and monopole antenna arrays, and the pattern is equal up and down, so a part of the radio wave is consumed, so the gain is relatively low

The current antennas cannot meet the current communication needs, especially the dual-band broadband high-gain antennas cannot meet the requirements

(4) Most of the current cell coverage and beautification antennas use monopole antennas and dipole antennas, and it is difficult to control the frequency band. At the same time, in order to make full use of existing resources and adapt to the needs of different environments, the antenna design is required to be flexible. Can meet the needs of different occasions

Moreover, the products developed are all directional antenna products. Although there are a few broadband omnidirectional antenna products, they are complex in structure, cumbersome in design, poor in versatility, high in processing cost, and have certain defects in performance, so they are not suitable for promotion.

[0003] Literature "Y.Yang, Y.Wang, and A.E.Fathy, Design of compact Vivaldi antenna arraysFor UWB see through wall applications, Progress In Electromagnetics Research, PIER 82, 401-418, 2008", "Zhang Cheng Hao, Wei Hong et al , A novel feeding technique for antipodal linearly tapered Slot Antenna Array, IEEE MTT-S International Microwave Symposium Digest, 2005" etc. are all researching the feeding structure and array structure of the slot antenna, but only from a single feeding or array structure to explain

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