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Noise floor and dynamic range analysis of a microwave attenuation measurement receiver from 50 MHz to 26.5 GHz

机译：50 MHz至26.5 GHz微波衰减测量接收机的本底噪声和动态范围分析

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摘要

The noise floor and dynamic range of a proposed voltage-ratio based microwave attenuation measurement receiver are analysed. The thermal noise and phase noise effect on attenuation measurement is studied. For frequencies higher than 1 GHz, the receiver employs a lock-in amplifier with a coherent frequency reference to minimize the phase noise effect and achieve very wide dynamic range of attenuation measurement. The equivalent noise floor at the receiver mixer output port is found to be around -172 dBm. The dynamic range of the receiver is 181-175 dB from 50 MHz to 26.5 GHz. Measurement results of a 0-170 dB synthesized step attenuator at 26 GHz is given to verify the performance of the proposed receiver.
机译：分析了提出的基于电压比的微波衰减测量接收机的本底噪声和动态范围。研究了热噪声和相位噪声对衰减测量的影响。对于高于1 GHz的频率，接收器采用具有相干频率参考的锁定放大器，以最大程度地减小相位噪声影响并实现非常宽的动态衰减测量范围。接收器混频器输出端口的等效本底噪声约为-172 dBm。接收机的动态范围从50 MHz到26.5 GHz为181-175 dB。给出了在26 GHz时0-170 dB的合成步进衰减器的测量结果，以验证所提出的接收机的性能。

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