| 摘要 |
The circuit (5) has two input terminals (57, 59) connected to two terminals (46, 48) of a directional coupler (4), respectively. A homodyne detector (60) has a signal input connected to one of the input terminals, and a local oscillator input connected to the other input terminal. Two low-pass filters (66, 67) have inputs connected to two outputs of the homodyne detector, and provide information relative to output load impedance of the directional coupler, respectively. An independent claim is also included for a method for estimating output load impedance of a directional coupler. |
