Horizontally polarized omnidirectional antenna with full wave oscillators

Abstract

Provided is a horizontally polarized omnidirectional antenna with full wave oscillators. Three full wave oscillators are coplanar to form a circular array, a parallel double-conductor feed line is used for feed, the oscillators are connected in parallel equivalently, the array impedance can be reduced greatly, the impedance of a printing feed line is adjusted so that the feed line can match to 50ohm. Breakthrough is made in the technical bottleneck in realizing engineering application due to high impedance, and the structure can be used for design of the vertically as well as horizontally polarized omnidirectional antenna.

Description

technical field [0001] The invention relates to wireless communication antenna equipment and technology, in particular to a full-wave vibrator horizontally polarized omnidirectional antenna. Background technique [0002] Horizontally polarized omnidirectional antenna is an important antenna type in the field of wireless communication, and its application requirements are very strong and extensive. For example, H / V orthogonal dual-polarized omnidirectional MIMO antenna can be combined with vertically polarized omnidirectional antenna to improve communication system capacity. So far, the horizontally polarized horizontal omnidirectional antennas that have been invented are almost all based on the loop antenna theory, that is, the electric small loop antenna and the electric large Alford loop antenna. The former is the earliest horizontally polarized omnidirectional antenna invented, but because the circumference is much smaller than the working wavelength, the current is equa...

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Problems solved by technology

However, as the number of vibrators increases, the design of the matching network of the circular array becomes more complex, and impedance matching is difficult. At the same time, the gain in the horizontal direction of the pattern decreases significantly, and the out-of-roundness will also significantly deteriorate. The difference in the pattern within the band is large, and the efficiency It is also greatly reduced; the second method is to increase the electrical length of the oscillator unit in the circular array, such as increasing from half-wavelength to 1 wavelength, the so-called full-wavelength dipole (full-wavelength dipole, L≈ 1.0 · lambda ), its gain can reach G ≈4dBi However, its input impedance is as high as several kΩ, it is extremely difficult to achieve impedance matching, so it has not been applied in engineering

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