High-reliability microwave signal detection circuit

Abstract

The invention provides a high-reliability microwave signal detection circuit which comprises a signal input port, a direct-current power supply port, a grounding port, an output port, a coupling module, a detection module, a reference voltage module, a voltage comparison module, a first resistor, a second resistor, a first inductor and a second inductor. The two choke inductors are additionally arranged at the input voltage dividing end, eutectic welding is adopted in the component structure welding process, the precision of comparison point voltage and the sensitivity of the detector diode are improved, and the dynamic detection range and reliability of a product are improved.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a highly reliable microwave signal detection circuit. Background technique [0002] The RF signal is a high-frequency signal, and the microwave signal detection circuit can be used to detect the amplitude of the RF signal. When the input level is within the specified range, the output level is TTL low level. When the input level exceeds the specified range, the output level The TTL level is flipped, thereby making a detection indication. Due to the small size of the substrate of the RF product, the RF signal is prone to coupling or crosstalk, which interferes with the comparison point voltage at the negative input end of the comparator in the microwave signal detection circuit and affects the detection result. According to the existing microwave detection circuit topology, when the input power When it is small, the radio frequency signal will be coupled to the negative input ter...

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Problems solved by technology

Due to the small size of the substrate of RF products, RF signals are prone to coupling or crosstalk, which interferes with the comparison point voltage at the negative input terminal of the comparator in the microwave signal detection circuit and affects the detection results. According to the existing microwave detection circuit topology, when the input power When it is small, the radio frequency signal will be coupled to the negative input terminal of the voltage comparator. When the input power is large, the detection voltage may affect the voltage of the comparison point. It is difficult to detect the fluctuation of the input terminal of the voltage comparator with the existing structure due to the interference of the radio frequency signal. At the same time, it is impossible to effectively prevent the coupling and crosstalk of RF signals, which will affect the reliability of the detection circuit

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