Rectenna based on microwave photonic crystal structure

Abstract

The invention belongs to the technical field of wireless energy transmission and provides a linearly polarized microstrip rectenna based on a microwave photonic crystal structure. The rectenna consists of a receiving antenna, an input low-pass filter, a matching circuit, a rectifying circuit and an output low-pass filter, wherein the receiving antenna, the input low-pass filter, the matching circuit, the rectifying circuit and the output low-pass filter are designed in the same plane. According to the rectenna, the receiving antenna adopts the microwave photonic crystal structure, so that the microwave reception capability of the rectenna is enhanced; and a defected ground structure is partially introduced into the input low-pass filter, so that the low-pass characteristics of the filter are optimized. The rectenna has the advantages that through the introduction of the photonic crystal structure and the defected ground structure, the size of the rectenna is reduced effectively, the design structure is simplified, and the gaining and rectifying efficiency of the rectenna is increased; and the rectenna is simple in structure, low in cost, light in weight and easy in system integration and large-batch production and can supply microwave energy to low-power loads, such as radio frequency identification, wireless sensors, micromachines.

Description

technical field [0001] The invention belongs to the technical field of wireless energy transmission, and relates to a microstrip rectifying antenna with a photonic crystal structure, which is used for receiving microwave energy in space and converting it into DC output. Background technique [0002] The concept of microwave wireless energy transmission was proposed as early as the 1960s, and it has been applied in high-power microwave wireless energy transmission occasions such as solar satellites and unmanned aerial vehicles. However, in these applications, the requirements for transmitters and transmitting antennas are very strict, and high-power microwave electromagnetic fields have a great impact on the ecological environment and biological safety, so they have not been popularized so far. Today, with the rapid development of semiconductor technology and integrated electronic technology, the size of microelectronic circuits is getting smaller and smaller, and the demand ...

AI Technical Summary

Problems solved by technology

[0005] However, due to the disadvantages of large volume, bulkiness, high manufacturing cost, and low conversion efficiency, the traditional rectenna is limited in many occasions.

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