V-Band Quadrature Phase Shift Keying Demodulator Using Wr-12 Six-Port
Nazih Khaddaj Mallat
Emilia Moldovan
Serioja Ovidiu Tatu
A direct 61 GHz demodulator, based on a rectangular waveguide (WR-12) six-port, is presented in this letter. The six-port device, composed of four 90° hybrid couplers fabricated in a metal block of brass, is implemented in ADS software. Good agreement between QPSK demodulation results using an ideal six-port model and a second one, based on the S-parameter measurements of a 61 GHz hybrid coupler, is achieved.