Wireless direct-current-free sensing information transmission circuit

Abstract

The invention discloses a wireless direct-current-free sensing information transmission circuit, and belongs to the technical field of electronics. The transmission circuit comprises a receiving and transmitting antenna, a drain electrode matching circuit, an open circuit line, a sensor, a transistor containing a heterojunction and a resonant network. One end of the drain electrode matching circuit is connected with the receiving and transmitting antenna, the other end of the drain electrode matching circuit is connected with the drain electrode of the transistor containing the heterojunction,the source electrode of the transistor containing the heterojunction is connected with the open circuit line, the grid electrode of the transistor containing the heterojunction is grounded through the resonant network, and the output end of the sensor is connected between the drain electrode matching circuit and the transistor containing the heterojunction; and the drain electrode matching circuit receives the pumping microwave through the receiving and transmitting antenna and transmits a microwave signal modulated by the sensing information to the receiving and transmitting antenna. The circuit structure is simple, the remote wireless transmission of information can be realized under the conditions of small size and light weight, the use is convenient, and the use range is wide.

Description

technical field [0001] The invention belongs to the technical field of electronics, in particular to a wireless non-DC sensing information transmission circuit. Background technique [0002] Sensor information is usually output in the form of voltage or current signals, and the signals are generally weak, which puts forward higher requirements for wireless transmission of sensor information. In the sensor system network, the signal output by the sensor needs to be processed by the signal conditioning circuit, and then the conditioned signal is analyzed and processed by the information collection center to realize the sensor network. The typical processing of conditioning circuits includes circuit isolation, impedance transformation, level conversion, amplification, filtering, linearization, and various calculations. Especially in sensor information wireless transmission systems, conditioning circuits usually require various radio frequency circuits. Components such as oscil...

AI Technical Summary

Problems solved by technology

However, the conditioning transmission circuit of this sensing information has a complex structure, cannot be wirelessly transmitted, and is inconvenient to use

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