The design of a 5.305 GHz series feedback free running dielectric resonator oscillator （DRO） is presented. Its simulation and optimization are realized by obtaining the unloaded Q factor of the cavity dielectric res...The design of a 5.305 GHz series feedback free running dielectric resonator oscillator （DRO） is presented. Its simulation and optimization are realized by obtaining the unloaded Q factor of the cavity dielectric resonator （DR） and analyzing the linear and nonlinear models of the DRO. CAD packages of DR_Rez and Agilent Advance Design System （ADS） are used and the best tradeoff among the output power, phase noise, and frequency stability is achieved. With the result of simulation, a physical oscillator prototype is constructed. The measured results show the good agreement with those of simulation.展开更多
Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/m...Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/mW with red light illumination. And an even higher modulation rate of 2.24 MHz/mW with illumination of violet light was obtained. Instead of a drop in optically controlled DRO output power, a little rise of output power was achieved.展开更多
研究了一种具有较宽机械调频范围和较低相位噪声的X波段介质振荡器设计方法。利用介质谐振器法对三种型号的介质谐振器(DR)材料进行了精确的测试,得到了其介电常数rε和损耗角正切值tanδ以及DR的谐振频率。利用仿真软件建立微带线与谐...研究了一种具有较宽机械调频范围和较低相位噪声的X波段介质振荡器设计方法。利用介质谐振器法对三种型号的介质谐振器(DR)材料进行了精确的测试,得到了其介电常数rε和损耗角正切值tanδ以及DR的谐振频率。利用仿真软件建立微带线与谐振器耦合模型,通过仿真提取其S2P文件。选用GaAs FET ATF26884作为电路中的放大器件,使用生成的S2P文件建立介质振荡器(DRO)电路模型,调整耦合段和输出匹配微带线的长度,得到较低的相位噪声。测试证明输出信号的相位噪声在偏离中心频率100 kHz处小于-100 dBc/Hz。展开更多
文摘The design of a 5.305 GHz series feedback free running dielectric resonator oscillator （DRO） is presented. Its simulation and optimization are realized by obtaining the unloaded Q factor of the cavity dielectric resonator （DR） and analyzing the linear and nonlinear models of the DRO. CAD packages of DR_Rez and Agilent Advance Design System （ADS） are used and the best tradeoff among the output power, phase noise, and frequency stability is achieved. With the result of simulation, a physical oscillator prototype is constructed. The measured results show the good agreement with those of simulation.
基金supported by the National Science Foundation of China (NSFC)was also being financed by Royal society, U. K. during 1992
文摘Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/mW with red light illumination. And an even higher modulation rate of 2.24 MHz/mW with illumination of violet light was obtained. Instead of a drop in optically controlled DRO output power, a little rise of output power was achieved.
文摘研究了一种具有较宽机械调频范围和较低相位噪声的X波段介质振荡器设计方法。利用介质谐振器法对三种型号的介质谐振器(DR)材料进行了精确的测试,得到了其介电常数rε和损耗角正切值tanδ以及DR的谐振频率。利用仿真软件建立微带线与谐振器耦合模型,通过仿真提取其S2P文件。选用GaAs FET ATF26884作为电路中的放大器件,使用生成的S2P文件建立介质振荡器(DRO)电路模型,调整耦合段和输出匹配微带线的长度,得到较低的相位噪声。测试证明输出信号的相位噪声在偏离中心频率100 kHz处小于-100 dBc/Hz。
