Single Port Dual Frequency Dual Circular Polarization Antenna

Abstract

The invention discloses a single-port and dual-frequency dual-circularly polarized antenna comprises a high-frequency four-arm assembly, a low-frequency four-arm assembly, a balun, a feed port and an earth plate, wherein the low-frequency four-arm spiral assembly is spirally wound and fixed to the outer sidewall of the balun, the high-frequency four-arm assembly is located on the top of the balun and fixed to the low-frequency four-arm assembly, the feed port is arranged at the bottom of the balun, and the earth plate is fixed to the bottom of the balun; the low-frequency four-arm assembly comprises first supports, second supports and first connecting arms, the first supports are located on the top of the balun, the second supports are located at the bottom of the balun, the first connecting arms are spirally-distributed connecting rods, and the first supports are fixedly connected with the second supports through the first connecting arms; the high-frequency four-arm assembly comprises four second connecting arms which spirally extend outwards in the length direction of the balun. The single-port and dual-frequency dual-circularly polarized antenna is simple in structure, good in radiation performance and suitable for small-scale antenna design.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a single-port, dual-frequency, and dual-circularly polarized antenna. Background technique [0002] Most of the dual circularly polarized antennas in the prior art are dual-port dual-frequency dual circularly polarized radiation antenna structural solutions. The current single-port dual-frequency dual-circularly polarized antenna mainly includes the following types: 1. The design of dual-frequency dual-circularly polarized microstrip antenna, which uses an arc-shaped slot on the circular microstrip antenna to realize single-port dual-frequency The dual circularly polarized radiation antenna scheme is based on the deformation of the microstrip antenna. It has the characteristics of the microstrip antenna. Its impedance adjustment needs time and effort, and its bandwidth is narrow, and the radiation efficiency is not high enough. 2. In the Design of a Novel Dual-BandWide-Beam Qua...

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Problems solved by technology

The current single-port dual-frequency dual-circularly polarized antenna mainly includes the following types: 1. The design of dual-frequency dual-circularly polarized microstrip antenna, which uses an arc-shaped slot on the circular microstrip antenna to realize single-port dual-frequency The antenna scheme of dual circular polarization radiation is a scheme based on the deformation of the microstrip antenna. It has the characteristics of the microstrip antenna. Its impedance adjustment takes time and effort, and its bandwidth is narrow, and the radiation efficiency is not high enough.

2. In the Design of a Novel Dual-BandWide-Beam Quadrifilar Helix Antenna (Design of a Novel Dual-BandWide-Beam Quadrifilar Helix Antenna), the inner and outer quadrifilar helix antennas of different sizes are nested to achieve single-port dual-frequency circularly polarized waves. The radiation antenna scheme can only realize the radiation of circularly polarized waves in the same direction, and cannot achieve separate dual-frequency and dual-circular polarization

3. The dual-band dual circular polarization backfiring helical antenna uses two single-arm helical sleeves together to achieve dual frequency dual circular polarization. Although the antenna can achieve dual frequency dual circular polarization, its circular polarization axis ratio is not Not excellent, the antenna uses a double single-arm spiral inner sleeve structure, and the radiation beam realized is not wide enough; the radiation of the antenna is not excellent, and the lower end of the front-to-back ratio difference needs to be corrected by a reflective cavity (choke ring); the antenna needs The dielectric material is used as a support; the overall size of the antenna is very large due to its working mode and the reflective cavity at the rear end

[0003] For dual-frequency dual-circularly polarized antennas, the current existing solutions are mainly based on dual-ports, which is similar to the integration of two circularly polarized antennas and work separately. There are few designs for single-port dual-frequency dual-circularly polarized antennas.

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