Surface wave yagi antenna

Abstract

The invention provides a surface wave yagi antenna, which is characterized in that the excitation electromagnetic energy is TM surface waves, the surface wave yagi antenna comprises a dielectric layer, a surface wave transmitter, a surface wave director and a surface wave reflector, wherein the dielectric layer is used for supporting surface wave propagation, the surface wave transmitter is used for directionally transmitting surface waves, the surface wave director is used for directionally guiding and enhancing the surface waves, the surface wave reflector is used for directionally reflecting and suppressing the surface waves, one side of the dielectric layer is grounded, the surface wave transmitter, the surface wave director and the surface wave reflector are located on the other sideof the dielectric layer, the surface wave director and the surface wave reflector are respectively located at two sides of the surface wave transmitter. The compact surface wave antenna with a V-shaped surface wave director or a surface wave reflector is respectively designed based on the printed-monopole surface wave transmitter, so that the antenna structure is enabled to be more compact. The surface wave yagi antenna can also add a graphene layer to serve as a surface wave absorbing material at the side where surface waves need to be suppressed so as to reduce the backward and lateral radiation.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to surface wave Yagi antennas, which can be used in the fields of human body local area network wireless communication, in-chip wireless interconnection, space power synthesis and the like. Background technique [0002] With the development of body area network applications, the demand for wearable antennas is gradually expanding. In the human body area network, it can be divided into two types according to the different working modes, namely the body surface communication mode and the in vitro communication mode. [0003] For body-surface communication mode antennas, both the wearable transmitter and receiver are mounted on the surface of the human body, and biophysical signals can propagate along the body. In non-visual channels, surface waves are the main transport mechanism for body surface communication modes. [0004] In addition, for integrated antennas or on-chip antennas...

AI Technical Summary

Problems solved by technology

[0006] Among the existing surface wave antenna designs, a type of slot antenna in the form of a magnetic dipole needs to be slotted in the ground to excite surface waves. However, this type of antenna is difficult to apply to human body LANs or chip LANs in most cases; One type uses a planar monopole antenna, the excitation of surface waves is weak in directionality, and the path gain is small

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