A high-speed wide-band X-band FM deviator with a Gunn-effect diode

An X-band FM deviator with a Gunn diode has been developed which can be tuned from 9.8 to 10.5 GHz by a 2.7 volt change in bias voltage, with an output power of greater than +10.5 dBm over the band flat to within 2 dB. High-speed operations employing a 224 Mbit/s (megabits per second) pulse pattern generator have shown that the deviator is capable of following the input signal.