Novel high-efficiency 5.8 GHz rectification antenna

Abstract

The invention relates to a novel high-efficiency 5.8 GHz rectification antenna, which belongs to the field of wireless energy transmission and comprises a receiving antenna, a high-low impedance lineinput low-pass filter, a second rectifier diode, a three-fan-shaped branch shoot-through filter and a load which are connected in sequence. The impedance of the receiving antenna is consistent with the impedance of the diode; therefore, the purpose of cancelling the matching network is achieved; meanwhile, the overall area of the circuit is reduced; the loss caused by the matching circuit is reduced, and the overall efficiency of the rectification antenna is improved. According to the three-fan-shaped branch straight-through filter, the length and the angle of the fan-shaped branches are adjusted to achieve the good restraining effect on frequency points, a diode double-tube series-parallel connection mode is adopted, and therefore the rectification efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of wireless energy transmission and relates to a novel high-efficiency 5.8GHz rectifying antenna. Background technique [0002] In recent years, 5G communication and microwave wireless power transmission are research hotspots in various industries, and the use of rectennas for wireless power transmission (WPT) and wireless energy harvesting (WEH) is becoming an emerging technology. Multi-band, miniaturization, broadband, ultra-wideband, high gain, harmonic filtering, etc. have become the development trend of receiving antennas. The rectifier circuit is developing towards high efficiency, wide load, and compact size. It can be seen that it will be a very valuable research topic to improve the structure of the rectifier circuit and the receiving antenna reasonably so as to achieve the purpose of improving the conversion efficiency of the rectenna. [0003] Researchers at home and abroad have conducted a lot of researc...

AI Technical Summary

Problems solved by technology

The following problems still exist in the design of the traditional rectenna: (1) the existing rectenna mainly adopts the single-tube series mode in the diode part, and its rectification efficiency is not high

(2) The existing rectennas mainly use a quarter-wavelength microstrip line plus a capacitor in the pass-through filter, which mainly has the following disadvantages: ① produce parasitic effects ② high-frequency capacitor price relatively expensive

(3) The existing rectenna has a matching network, and the existence of the matching network increases the complexity of the circuit (more circuit elements), high loss, large size, and high cost

(4) The high-order harmonic signals generated by rectification cannot be effectively suppressed, which will reduce the conversion efficiency of the rectenna

[0004] To sum up, in the traditional rectenna, the diode part mainly adopts a single-tube series mode, and its rectification efficiency is not high; the direct filter part mainly adopts a direct circuit formed by a quarter-wavelength microstrip line plus a capacitor. Filters, mainly have the disadvantages of parasitic effects and high-frequency capacitors are relatively expensive

The existing rectenna has a matching network, and the existence of the matching network increases the complexity of the circuit (more circuit elements), high loss, large size, and high cost

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