A new topology that generates a DC voltage whose value is depending on the phase difference of two input RF signals is presented. It is implemented by the mixer concept. With the use of microwave photonics, the mixer-based phase detector can be operated over a very wide frequency range. It also has the advantages of high phase detection resolution, small phase detection error, and small DC offset and phase offset. The phase detector can be constructed using off-the-shelf components including a single integrated optical modulator and a low-speed balanced detector. Measured results on the phase detector demonstrate a 0° to 180° RF signal phase difference detection range for 3.5 GHz to 18 GHz input RF signal frequencies, less than ±3° phase detection error and 2° phase detection resolution.

中文翻译：

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基于光子学的射频信号鉴相器，具有宽工作频率范围和高分辨率

提出了一种新的拓扑结构，该拓扑结构将生成一个直流电压，该直流电压的值取决于两个输入RF信号的相位差。它由混频器概念实现。通过使用微波光子学，基于混合器的相位检测器可以在非常宽的频率范围内工作。它还具有相位检测分辨率高，相位检测误差小以及直流偏移和相位偏移小的优点。可以使用包括单个集成光学调制器和低速平衡检测器在内的现有组件来构建鉴相器。在相位检测器上的测量结果表明，对于3.5 GHz至18 GHz输入RF信号频率，RF信号相位差检测范围为0°至180°，小于±3°相位检测误差和2°相位检测分辨率。