Optoelectronic $K$-Band Oscillator With Gigahertz Tuning Range and Low Phase Noise
Optoelectronic $K$-Band Oscillator With Gigahertz Tuning Range and Low Phase Noise
复制标题
DOI：
10.1109/lpt.2010.2064762
复制
发表时间：
2010-10
影响因子：
2.6
通讯作者：
S. Fedderwitz;A. Stohr;S. Babiel;V. Rymanov;D. Jäger
中科院分区：
文献类型：
--
作者：
S. Fedderwitz;A. Stohr;S. Babiel;V. Rymanov;D. Jäger
我们提出并演示了一个K波段光电振荡器，具有超低相位噪声性能和超过1 GHz的频率调谐范围。其工作原理是使用两个长度相似但不相等的并联光电回路和一个用于频率调谐的电移相器。我们实验证明可调谐微波信号产生在20.7-21.8 GHz的粗频率分辨率为~100 MHz。还实现了在±5 MHz范围内对生成信号的微调。产生的微波信号在10 kHz偏移处的线宽和相位噪声分别为<3 Hz和-105dBc/Hz。在整个千兆赫调谐范围内，所产生的微波信号的相位噪声和输出功率的变化分别仅为±1.5和<;1 dB。
We propose and demonstrate a K -band optoelectronic oscillator with ultralow phase noise performance and a frequency tuning range exceeding 1 GHz. The operation principle is based upon using two parallel optoelectronic loops with similar but not equal length and an electrical phase shifter for frequency tuning. We experimentally demonstrate tunable microwave signal generation within 20.7-21.8 GHz with a coarse frequency resolution of ~100 MHz. Fine tuning of the generated signal within a range of ±5 MHz is also achieved. The linewidth and phase noise of the generated microwave signal are <;3 Hz and -105 dBc/Hz at 10-kHz offset, respectively. Within the full gigahertz tuning range, the phase noise and output power of the generated microwave signal varies by only ±1.5 and <;1 dB, respectively.