Leonard D. Cohen

A millimeter-wave, third-harmonic, Gunn VCO with ultra-wideband tuning

State-of-the-art ultra-wideband tuning (69 to 91 GHz) has been demonstrated with a third-harmonic, varactor-tuned, GaAs Gunn oscillator. The 22 GHz wide tuning band was obtained by tuning the voltage-controlled oscillator (VCO) at the fundamental frequency and using the in-situ generated Gunn-diode third harmonic for output. Lumped-element VCO circuit refinements have resulted in the frequency extension of the use of lumped-element VCO circuit technology to 91 GHz in W-band (WR-10) from the previously reported maximum frequency of 66 GHz in V-band (WR-15).<<ETX>>

Active Phase Shifters for the Millimeter and Microwave Bands

Frequency agile, varactor controlled, Gunn active phase shifters for the microwave and millimeter wave bands are described. Demonstrated performance includes up to 160 degrees of continuous, electronically controlled active phase shifting at 47 GHz with 160 mw output and up to 320 degrees of phase shift at 94 GHz with 40 mw output.