双频输出介质振荡器设计

Design of Dual-Band DRO

利用负阻振荡的工作原理,使用ADS和HFSS仿真软件对K波段介质振荡器进行了仿真设计,加工并进行了测试,同时设计了一个双工器,使基波和谐波分别从两个端口输出。通过实测结果可以看出,双工器很好地起到了隔离作用。介绍了介质振荡器设计的重点,阐述了双工器的工作原理,分析了介质谐振器和微带线耦合的等效电路,最后给出了介质振荡器(DRO)的实测结果:在基波输出端口,输出功率为6.75 dBm,二次谐波抑制度为23 dBc,相位噪声为-96.28 dBc/Hz@100 kHz;在谐波输出端口,输出功率为1.86 dBm,基波抑制度为23 dBc,相位噪声为-87.65 dBc/Hz@100 kHz,达到很好的分离作用,达到预期效果。

Based on the negative resistance oscillation principle,the ADS and HFSS software were used to design a K band dielectric resonator oscillator（DRO）.A diplexer was designed to make the fundamental and second harmonic frequency export from different ports.The measurements show that the diplexer performs well in the isolation.Meanwhile the elements of designing the DRO was introduced,and the working principle of the designed diplexer was elaborated,the equivalent circuit of the dielectric resonator coupled with microstrip line was analyzed.The experimental results show that the output power at the fundamental frequency is 6.75 dBm,the harmonic suppression is 23 dBc,while the phase-noise achieves -96.28 dBc/Hz@100 kHz.At the second harmonic frequency,the output power is 1.86 dBm,the fundamental suppression is 23 dBc,and the phase-noise achieved -87.65 dBc/Hz@100 kHz.The DRO achieves a good separation effect,and desired results are achieved.