Small-signal broadband voltage doubler rectifier with load adaptability

Abstract

The invention belongs to the technical field of microwave rectification, and provides a small-signal broadband voltage doubler rectifier with load adaptability. The rectifier mainly comprises an upper microstrip structure, an intermediate dielectric substrate and an underlying metal floor. The upper microstrip structure includes an input impedance matching network, a load adaptive regulation network and a first order voltage doubler rectification network, wherein the input impedance matching network consists of a 50 ohm microstrip line input, three pairs of open short circuit branches, three sections of impedance transformation branches, and a matching inductor; the load adaptive adjustment network consists of two sections of width tapered branches and a centrosymmetric fishbone-shaped branch; and the first order voltage doubler rectification network consists of an energy storage blocking capacitor, an energy storage filter capacitor, a rectifier diode, a load resistor, a metal pad and a ground hole. By adjusting the size of the input impedance matching network and the load adaptive regulation network, the small-signal broadband voltage doubler rectifier achieves good conversion efficiency of the rectifier over a broadband wide load range.

Description

technical field [0001] The invention relates to the technical field of microwave rectification, in particular to a small signal broadband voltage doubler rectifier with load adaptability. Background technique [0002] In recent years, with the development of various wireless communication technologies, there are abundant low-power electromagnetic waves in the surrounding environment. On the other hand, with the continuous emergence of low-power electronic products, the Internet of Things, smart cities, wireless sensor networks, etc. have received great attention. In many applications, it is desirable to convert RF energy to DC energy through microwave rectification. These applications include energy recovery, DC-DC conversion, wireless power transfer, etc. The function of the rectifier is to convert electromagnetic energy into DC energy, and it is the most critical component in the microwave rectification system. [0003] The output of the rectifier is usually connected t...

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Problems solved by technology

[0003] The output of the rectifier is usually connected to a variable impedance load, such as DC-DC converter, power management unit and super capacitor, etc., and their impedance will change under different working conditions, which means that the input impedance of the rectifier will change Corresponding changes, which lead to the mismatch of the matching circuit at the input end of the rectifier, and finally cause the conversion efficiency of the rectifier to decrease, and the result of performance degradation

Facing the complex electromagnetic environment, single-frequency or narrow-band rectifiers no longer meet the actual needs, while broadband rectifiers can guarantee better performance in a wider frequency range and are more adaptable, but the design of broadband matching circuits is relatively speaking. have a certain degree of difficulty

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