High-gain end-fire antenna based on spoof surface plasmon polaritons

Abstract

The invention discloses a high-gain end-fire antenna based on spoof surface plasmon polaritons (SSPPs), which comprises a dielectric substrate, an upper metal patch and a lower metal patch, wherein the upper metal patch is positioned on the upper surface of the dielectric substrate and includes a microstrip transmission line, a gradual change transition groove, an SSPPs transmission line, part ofa dipole and a director; and the lower metal patch is positioned on the lower surface of the dielectric substrate and includes a grounding plane, the gradual change transition groove, the SSPPs transmission line and part of the dipole. The structure adopts a spoof surface plasmon polariton waveguide to transmit energy, realizes radiation by using the dipole at a terminal, introduces the director of a yagi antenna to the tail end of the antenna and replaces a reflector of the yagi antenna with the grounding plane, so that the gain is improved. The high-gain end-fire antenna optimizes the traditional dipole end-fire antenna, has the advantages of simple design structure and increased working bandwidth, reduces the mutual coupling between antennas and greatly improves the gain of the antenna.

Description

technical field [0001] The invention relates to a high-gain end-fire antenna based on artificial surface plasmons, which can be used in the field of microwave technology. Background technique [0002] Artificial surface plasmon waveguides are considered to be an ideal choice for transmission lines in the GHz to THz region, and have attracted extensive attention from the scientific and engineering communities in recent years. The most commonly used is to use periodic trench structures to guide artificial surface plasmon waves, and based on this waveguide structure, various passive devices such as antennas, filters, and couplers have been designed. The development of artificial surface plasmon polaritons mainly depends on the radiation of SPP waves. The various radiation methods realized now open up the way for antennas based on artificial surface plasmon polaritons, but most of them are large in size and relatively complex. Therefore, we considered other radiating elements. ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a high-gain end-fire antenna based on artificial surface plasmons, which solves the problem of low gain of dipole antennas and provides a basis for future research on antennas with higher gain. lay the foundation

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