The paper introduces a GaAs MMIC digital phase modulator based on a lumped quadrature hybrid. The quadrature coupler is implemented using two interleaved spiral inductors in a transformer-like configuration. The phase control is obtained electronically tuning two L-C resonators that load the coupled ports. The resulting phase modulator exhibits a continuous phase-shift capability of nearly 230°. The modulator can be digitally driven providing a 0°-180° or 0°-90° phase-shift, with constant insertion loss. Theoretical and experimental results are discussed.
GaAs MMIC digital phase modulator / Avitabile, G; Cidronali, A; Salvador, C; Manes, G. - STAMPA. - (1997), pp. 354-358. (Intervento presentato al convegno 27th European Microwave Conference, EuMC 1997 tenutosi a Jerusalem, Israel nel September 8-12, 1997) [10.1109/EUMA.1997.337824].
GaAs MMIC digital phase modulator
Avitabile G;
1997-01-01
Abstract
The paper introduces a GaAs MMIC digital phase modulator based on a lumped quadrature hybrid. The quadrature coupler is implemented using two interleaved spiral inductors in a transformer-like configuration. The phase control is obtained electronically tuning two L-C resonators that load the coupled ports. The resulting phase modulator exhibits a continuous phase-shift capability of nearly 230°. The modulator can be digitally driven providing a 0°-180° or 0°-90° phase-shift, with constant insertion loss. Theoretical and experimental results are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
