Diseño de un desfasador programable para antenas de tipo array

Abstract

This paper presents the implementation of an 8 bits programmable active phase shifter for phased array antenna applications. This circuit is designed to operate in the bandwidth that goes from 27.5 GHz to 30 GHz and it has been implemented in SiGe_1K5PAx technology of Global Foundries. The phase shifter has a vector sum phase structure, generating 360° phase shifts. Also, is composed by of a quadrature generator formed by a polyphase filter. In the same way, is composed by of an amplifier based on a Gilbert cell, considering the current of the Digital/Analog Converter (DAC), that will perform as current mirror of the net mentioned.