Horizontal polarization omnidirectional antenna based on composite right-left hand transmission line

Abstract

The invention provides a zero-order resonance loop antenna based on a composite right-left hand transmission line, and the antenna provided by the invention can achieve horizontal polarization omnidirectional coverage by utilizing the zero-order resonance characteristics of the composite right-left hand transmission line and can be used for supporting a communication system of a wireless local area network; and the basic units of the horizontal polarization omnidirectional antenna need the current distribution which has the equal magnitude and the same direction. By adopting the zero-order mode resonance of the composite right-left hand transmission line, because the phase speed of the composite right-left hand transmission line is zero and the current of each section on the loop antenna does not have phase deviation and is uniform and synclastic, the problem of non-uniform current distribution of a radio antenna is solved, and the good impedance bandwidth is obtained. By changing the dimension of the zero-order mode loop antenna, the zero-order mode loop antenna can achieve the coverage of different frequency ranges, has the advantages of simple structure, easiness in realization and good horizontal polarization omnidirectional radiation characteristics of the antenna, provides polarization diversity units for the antenna of a wireless local area network system or a small-sized base station and promotes the development of a novel antenna technique, thus the omnidirectional antennan which has the advantages of miniaturization, multi-polarization and low cost is realized.

Description

technical field [0001] The invention belongs to the technical field of antenna design of wireless communication technology, and in particular relates to a horizontally polarized omnidirectional antenna based on left and right hand composite transmission lines. Background technique [0002] As the throat of the mobile communication system, the antenna is a system component that radiates and receives electromagnetic waves. The quality of the antenna performance plays a decisive role in the overall performance of the mobile communication system. With the continuous improvement and development of wireless communication technology, the antenna performance must not only meet the characteristics of light weight, small size, simple production, and low cost, but also support the application of distributed antennas, MIMO multiple antennas and other technologies. For a communication environment rich in multipath, polarization diversity has been considered as one of the optimal MIMO (M...

AI Technical Summary

Problems solved by technology

However, due to its small radiation resistance and high reactance, the impedance matching of the electric small loop antenna is difficult to achieve

Although the electric large loop antenna can obtain the ideal impedance bandwidth, the magnitude and direction of the current on the loop are not uniform, so that the omnidirectional pattern of horizontal polarization cannot be produced.

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