Abstract: In order to meet the requirement of the miniature Coherent Population Trapping (CPT) atomic frequency standard, we have studied a small-size and low power consumption microwave circuit. By means of ADS simulation, we have designed and realized small size and lower dissipation microwave circuit with a step recovery diode as the nonlinear device, and the microstrip guiding microwave. The size of the circuit is 20mm×10mm and power consumption is less than 10mW. The measured results show that when the power of input 569.5MHz signal is 6dBm, the circuit generates the wanted 3417MHz microwave signal with -9dBm output power, the output microwave satisfies the requirement of the designed CPT atomic frequency standard.

Key words: Microwave circuit, Frequency multiplier, Atomic frequency standard