Back-feed type film digit television omnidirectional reception antenna

Abstract

The invention discloses a back-feed type film digit television omnidirectional reception antenna comprising a medium substrate, and a single arm film copper foil and a feeder panel respectively attached on two side faces of the medium substrate; the single arm film copper foil is parallelly attached on the front side of the medium substrate in a spiral band shape in an anticlockwise winding mode; the width of the single arm film copper foil gradually increase from the start point, and the widest portion in the end point forms a suddenly-broken shape; the feeder panel parallelly fixed on the backside of the medium substrate is a single side clad copper plate; the distance between the clad copper plate and the film copper foil is 2-5mm; the clad copper plate shape is in a rectangular type, and the clad copper plate area size basically matches with the maximum cross section of the main radiation field ellipse sphere of the film copper foil; the feeding point of the film copper foil is arranged on the film copper foil anticlockwisely winding for 150-190 degrees from the start point; the feeder panel feeding output point is arranged in the intersection point between the feeder panel short edge central axis and the long edge proportion cutting line.

Description

technical field [0001] The invention relates to an antenna, in particular to a back-feeding film type omnidirectional receiving antenna for digital TV. Background technique [0002] Most traditional digital TV receiving antennas use Yagi antennas. This kind of antenna has large volume, narrow frequency band, and single polarization. When installing, the director on it must be consistent with the polarization direction of the transmitting antenna, otherwise the receiving effect will be reduced. [0003] With the continuous development of wireless communication technology, miniaturization and broadband are the two main development directions of antennas. Theoretically speaking, the lower the operating frequency of the antenna, the longer the wavelength, and the corresponding increase in antenna size. The reduction of the antenna size will inevitably lead to the deterioration of the antenna performance in some aspects, such as: the narrowing of the bandwidth and the increase ...

AI Technical Summary

Problems solved by technology

As the frequency decreases, the number of metal conductor coils needs to increase, and the size will also increase accordingly; at the same time, in order to realize the power feed, a broadband feed network is required. The balun is a typical broadband feed implementation method, and generally requires It is perpendicular to the antenna plane and has a large size, so the antenna fed by the balun is large in size, which is not conducive to the miniaturization of the antenna

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