Braodband High-Order Frequency Multipliers by using Dual-Gate MESFET's

Some experimental results obtained for high-order frequency multipliers using MESFET's are presented. The active device considered is a GaAs Dual-Gate MESFET with submicrometer gate length. The frequency range of the output signal is from 1 up to 21 GHz, for an input frequency between .1 and 1 GHz. As a typical result, a higher multiplication factor value up to 200 has been obtained and a maximum output frequency of 40 GHz has been observed. Consequently, two main applications can be proposed: - first: as a broadband comb-generator - second: as a very simple crystal controlled high frequency generator.