Integrated and small-sized coaxial feeding circularly polarized rectifying antenna unit design

Abstract

The invention discloses an integrated and small-sized coaxial feeding circularly polarized rectifying antenna used for a 2.45GHz microwave power transmission system. The antenna comprises a sheet material, a coaxial circularly polarized microstrip antenna, a rectifying diode, a low-pass input oval filter, an output filter and a matching circuit; the sheet material adopts the common FR4, so that the research cost of the rectifying antenna is greatly lowered; the circularly polarized corner-cut coaxial microstrip antenna has the central frequency point of 2.45GHz; a coaxial feeding point mode for feeding, and layered design of a rectifying circuit, the matching circuit and a receiving antenna are adopted, and two layers are connected by using an SMA connector; the low-pass input oval filteradopts bending design, so that the length of the rectifying circuit is shortened; the area of the rectifying antenna is reduced, the microwave receiving power within unit area is improved; by adoptionof the matching circuit with low loss sand high matching effect, the efficiency of the rectifying circuit is improved; by designing a direct current expansion interface, the rectifying antenna unitscan be cascaded into a rectifying antenna array conveniently; and tests prove that the antenna efficiency can reach as high as 75% when the load is 200-<omega>.

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 ...

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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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