Simple technique for fine tuning of impedance matching circuits for the mm-wave region

High Performance Optical Receiver Using a PIN Photodiode and Amplifier for Operation in the Millimeter-wave Region

“…An 8 GHz variation of the centre frequency of operation can be achieved for a change in length of the bondwire of 0.5 to 0.8 mm at 27GHz. The design can also allow for fine fequency tuning by changing the shape of the bondwire [10]. The model of the photodiode and the matching network used in our circuit is shown in Fig.…”