A 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 self-adaptability. The rectifier is mainly composed of an upper microstrip structure, an intermediate medium substrate and a bottom metal floor. The upper microstrip structure includes input impedance matching network, load adaptive regulation network and first-order voltage doubler rectification network. Among them, the input impedance matching network is composed of a 50-ohm microstrip line input end, three pairs of open-circuit short-circuit branches, three sections of impedance transformation branches, and a matching inductor; the load adaptive adjustment network is composed of two sections of width tapered branches, a center symmetrical fish It is composed of bone-shaped branches; the first-order voltage doubler rectifier network is composed of energy storage DC blocking capacitors, energy storage filter capacitors, rectifier diodes, load resistors, metal pads, and ground holes. By adjusting the size and size of the input impedance matching network and the load self-adaptive adjustment network, the invention enables the rectifier to obtain good conversion efficiency in a wide frequency and 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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