High-power and efficient radio frequency-direct current converter

Abstract

The invention discloses a high-power and efficient radio frequency-direct current converter, and relates to the technical field of radio frequency communication and broadcast transmission. The invention comprises a directional coupler, a transistor and a choking coil, wherein the radio-frequency power input at the input end is divided into two paths after passing through the directional coupler; one path is connected to a drain electrode of the transistor, and the other path is connected to a grid electrode of the transistor; a source electrode of the transistor is grounded; the drain electrode of the transistor is further connected to the output end through a choking tube; one path of the output end is grounded through a capacitor, and the other path of the output end outputs direct current power. The high-power and efficient radio frequency-direct current converter can be used for establishing a power recycling system in a high-power transmitter, and has the characteristics of large power capacity, high efficiency and wide working frequency band.

Description

technical field [0001] The invention relates to the technical fields of radio frequency communication and broadcast transmission, in particular to a high-power and high-efficiency radio frequency-direct current converter. Background technique [0002] In radio frequency communication and broadcast transmission systems, a lot of useless radio frequency power is dissipated in the form of heat, such as the absorbing load of the synthesizer and the absorbing load of the LINC transmitter. If the radio frequency power can be recycled, the energy consumption and heat dissipation of the transmitter can be greatly reduced, which has great economic benefits. In the RF power recovery system, the most core component is the RF-DC converter. [0003] see figure 1 , the RF-DC converters in the prior art are all implemented based on diode devices. Such RF-DC converters have been widely used in many small power recovery, wireless power harvesting devices. But when it is applied to a hig...

AI Technical Summary

Problems solved by technology

But when it is applied to a high-power power recovery device, it has insoluble difficulties:

[0004] 1) Inefficiency

Because of the saturation voltage drop of the diode device, a large amount of power is consumed in the diode, and the overall RF-DC conversion efficiency is difficult to exceed 50%.

[0005] 2) Limited power capacity

RF-to-DC converters beyond 10W are difficult to implement due to limited power capacity of diodes

[0006] Narrow working frequency band

The upper limit cut-off frequency and power capacity of the diode are two factors that restrict each other and cannot be considered at the same time

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