Microwave signal on-off control method and light-operated microwave switch based on photoelectric detector

Abstract

The invention discloses a microwave signal on-off control method based on a photoelectric detector. A photoelectric detector is connected in series to a low-frequency microwave signal path, and a resistor R1 connected in parallel with the load of a low-frequency microwave signal is connected after the photoelectric detector. The on-off of the low-frequency microwave signal path is controlled by controlling the light signal irradiating on the photoelectric detector. When there is light, the low-frequency microwave signal path is switched on; and when there is no light, the low-frequency microwave signal path is switched off. The invention further discloses a light-operated microwave switch based on a photoelectric detector. Through the photoelectric detector, the microwave signal is switched on under the condition of light and is switched off under the condition of no light. The working frequency and the switching speed of the microwave switch can be significantly improved, and the microwave switch is simple in structure and easy to integrate. By adding an inductor and a resistor connected in parallel with the photoelectric detector, on-off of a high-frequency microwave signal can be controlled, and the working frequency and the working bandwidth can be adjusted flexibly.

Description

technical field [0001] The invention relates to a microwave switch, in particular to an optically controlled microwave switch, belonging to the technical field of microwave photons. Background technique [0002] The main function of the microwave switch is to control the on-off of microwave signals or to cut off different channels. It is an important part of microwave control circuits and is widely used in electronic countermeasures, microwave measurement, communications, satellites and radars. With the rapid development of microwave technology, the performance requirements of microwave switches are also increasing, and it is urgent to improve their performance indicators such as operating frequency, operating speed, and operating bandwidth. Traditional PIN diode switches and RF-MEMS switches (radio frequency microelectronic switches) are gradually unable to meet such requirements due to electronic bottleneck restrictions. [0003] Compared with traditional microwave switch...

AI Technical Summary

Problems solved by technology

In order to solve these problems, light-controlled microwave switches based on photodetectors have been proposed one after another. They have the advantages of low excitation light power and are suitable for high-speed switching, but their working frequency band is low. Until 2016, "Frequency down-conversion using photodiode sanpling "The article mentioned the method of using UTC-PD to realize the microwave switch, but its switching mode is light blocking, no light conduction, which is opposite to the general switch mode, and there are many inconveniences in practical applications.

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