Broadband multi-polarized reconfigurable slot antenna and polarization method therefor

Abstract

The invention discloses a broadband multi-polarized reconfigurable slot antenna and a polarization method therefor. The broadband multi-polarized reconfigurable slot antenna comprises four layers of dielectric substrates, wherein an elliptical metal patch is arranged on the lower surface of the first layer of dielectric substrate; a first feed structure is arranged on the upper surface of the second layer of dielectric substrate; a metal layer is arranged on the upper surface of the third layer of dielectric substrate; a quasi-cross-shaped slot is formed in the metal layer; a second feed structure is arranged on the upper surface of the fourth layer of dielectric substrate; and a reconfigurable wilkinson power divider is arranged on the lower surface of the fourth layer of dielectric substrate. The linear polarization radiation state with ultrahigh port isolation in two vertical directions can be achieved through a quasi-cross-shaped slot antenna fed through the first feed structure and the second feed structure; the wilkinson power divider conducts different paths through pin diodes and is connected with the first feed structure and the second feed structure through a plated through hole, so that five different antenna polarization modes of -45-degree linear polarization, 45-degree linear polarization, + / -45-degree dual-linear polarization, left-hand circular polarization andright-hand circular polarization can be achieved, the relative bandwidth is close to 20%, and the broadband multi-polarized reconfigurable slot antenna fully adapts to different work requirements.

Description

Technical field [0001] The invention relates to the field of electronic communication, in particular to a broadband multi-polarization reconstruction slot antenna and a polarization method thereof. Background technique [0002] With the rapid development and wide application of wireless communication systems, polarized reconfigurable antennas have received more and more attention. Polarized reconfigurable antennas can change the polarization mode in a space with limited volume, add additional transmission and reception channels, and make great contributions to polarization diversity, frequency reuse, and polarization modulation. The current methods to realize polarization reconfiguration mainly include controllable feed networks and controllable slots. The former loads the feed network with variable reactance or switches the feed position to produce phase differences in different working modes to achieve reconfigurable polarization. The latter is to etch the gap at the appropri...

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Problems solved by technology

[0003] Due to the various constraints brought by the small number of antennas to the wireless communication system of the traditional antenna, not only the volume of the antenna is large, the weight of the antenna is heavy, the cost of the antenna is high, but also the working frequency band and working mode of the antenna are relatively single

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