Wireless energy collection metamaterial antenna with adjustable broadband

Abstract

The present invention discloses a wireless energy collection metamaterial antenna with an adjustable broadband. The antenna comprises a rectangular double-layer circuit board, the upper layer of the rectangular double-layer circuit board is provided with at least one rectangular metal sheet-shaped radiation unit and a rectangular metal sheet-shaped launching pad, and the lower layer of the rectangular double-layer circuit board is provided with a metal ground plate; the radiation unit and the launching pad are equidistantly arranged in order in the mode of allowing the geometric centers of the radiation unit and the launching pad to be located at the middle line of the long side of the rectangular double-layer circuit board, and one side of the launching pad is overlapped with one side of the rectangular double-layer circuit board; a capacitor is arranged between the radiation unit and the launching pad, and the capacitance of the capacitor is regulated; and the geometric center of the radiation unit is connected with the metal ground plate through a metallization via hole. The wireless energy collection metamaterial antenna with the adjustable broadband has the characteristics of adjustable broadband and frequency band, is suitable of the microwave wireless energy collection in the environment, and is simple in structure, miniaturized, low in manufacturing cost and especially easy to be integrated to other wireless node devices while realizing large-scale radio wave energy collection.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a broadband adjustable wireless energy harvesting metamaterial antenna. Background technique [0002] For a long time, due to the limitation of battery capacity, the power supply of wireless sensor networks has been a major challenge in the design process of sensor nodes, which makes the life cycle length of existing wireless sensor networks very limited. People have proposed solutions for wireless energy transmission. According to different transmission mechanisms, wireless energy transmission can be divided into electromagnetic radiation, electric field coupling, magnetic field coupling, and ultrasonic waves. Electromagnetic radiation includes radio waves and lasers. Magnetic field The coupling type is divided into inductive type and resonance type. The radio wave method has been extensively studied because of its long transmission distance, wide range of energy sources, and ...

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Problems solved by technology

However, the main frequency band is not fixed, but changes with the change of the electromagnetic environment. The existing antennas

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