An integrated, miniaturized coaxial feed circularly polarized rectenna

Abstract

The invention discloses an integrated and miniaturized coaxial feed circularly polarized rectifying antenna for a 2.45GHz microwave power transmission system, which comprises: a plate, a coaxial circularly polarized microstrip antenna, a rectifying diode, and a low-pass input ellipse Filters, output filters, matching circuits; common FR4 boards are used, which greatly reduces the research cost of rectennas; the center frequency of the circularly polarized angle-cutting coaxial microstrip antenna is 2.45GHz, and the coaxial feed point is used for feeding. The rectifier circuit, matching circuit and receiving antenna are designed in layers, and the two layers are connected by SMA connectors. The low-pass input elliptic filter uses a curved design to reduce the length of the rectification circuit. The invention reduces the area of ​​the rectifying antenna and improves the microwave receiving power per unit area. A matching circuit with low loss and high matching effect is adopted to improve the efficiency of the rectification circuit. The DC extension interface is designed to facilitate the cascading of rectenna units into rectenna arrays. After testing, the efficiency of the antenna reaches up to 75% when the load is 200Ω.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a 2.45GHz integrated, miniaturized coaxial feeding circularly polarized rectifying antenna. Background technique [0002] Microwave antenna rectification is a key part of microwave power transmission system, and it is still in the stage of laboratory research. At present, domestic and foreign countries are basically focusing on the efficiency of rectennas, but less consideration is given to the key factors of the application of rectennas. For example, the area problem of the rectenna. At present, all research institutions at home and abroad have not involved the area of ​​rectennas, and the areas of various rectennas designed by them are relatively large. For the equipment that needs to be charged, the smaller the area of ​​the rectenna, the better. When single rectenna elements are cascaded to form a rectenna array, a rectenna with a smaller area can increase the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a 2.45GHz integrated, miniaturized coaxial feed circularly polarized rectenna, which aims to solve the problem that the current 2.45GHz frequency rectenna has a large area, does not use the installation between the rectenna and the equipment, and does not It is beneficial to improve the receiving power per unit area, and the problem of using high-frequency plate research and high production costs

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