A GaAs MMIC phase shifter based on coupled spiral inductors

Avitabile, G. ; Cidronali, A. ; Salvador, C. ; Speciale, M. (1997) A GaAs MMIC phase shifter based on coupled spiral inductors. In: Gallium Arsenide Applications Symposium. GAAS 1997, 3-5 September 1997, Bologna, Italy.

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Abstract

In this paper a GaAs MMIC phase shifter, based on a lumped quadrature hybrid, is described. The MMIC makes use of two interleaved spiral inductors in a transformer-like configuration to implement the quadrature coupler function. Two L-C resonant networks connected as load, provide the desired analog phase swing, under electronic control thus resulting a phase-shift capability of nearly 180°.

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