Double-cross slot cavity antenna with bidirectional co-spin circular polarization characteristics

Abstract

The invention discloses a double-cross slot cavity antenna with a bidirectional co-spin circular polarization characteristic, and belongs to the field of antenna design. The antenna comprises a single layer dielectric substrate, metal via hole arrays, a front cross slot, a back cross slot and a coaxial feed port. Metal is coated on front and back surfaces of the single layer dielectric substrate. The edges of the single layer dielectric substrate are all surrounded by the metal via hole arrays, thereby forming a metal cavity structure. The front cross slot and the back cross slot are etched on the metal coated on the front and back surfaces of the single layer dielectric substrate as radiation structures. The coaxial feed port is located at the center of one edge of the dielectric substrate as a signal input end. According to the antenna, multiple frequency bands can be covered. The double-cross slot cavity antenna which has the bidirectional co-spin circular polarization characteristic and only employs the single layer dielectric substrate is realized. The impedance bandwidth, axial ratio bandwidth, directional diagram and gain performance of the antenna are good. Moreover, the antenna has the advantages of low profile, low cost and easy processing and is applied to a wireless communication device in a laneway environment.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to antenna design technology, in particular to a double-cross slot cavity antenna with bidirectional co-rotating circular polarization characteristics. Background technique [0002] Most areas of the country have achieved wireless communication coverage, but wireless communication is still developing slowly in some environments, and the coverage and quality of signals are not good enough. The roadway environment is one of the representative space-constrained communication environments. In the narrow sense, the roadway environment includes spaces with complex structures such as mines and tunnels, and in the broad sense, it includes high-speed rail tracks, city streets, and bridges. [0003] In the roadway environment, compared with wired communication equipment, wireless communication equipment has the characteristics of low cost, convenient design, layout, maintenance, and...

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Problems solved by technology

However, waveguide antennas, dipole antenna arrays, slot antennas combined with frequency selective surfaces all have problems such as large size and in

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