Summary
International Symposium on Antennas and Propagation
2015
Session Number:S5.9
Session:
Number:S5.9.4
A Simple Reconfigurable BiCMOS Active Inductor and Its Implementation in A Phase-Shifter Unit Cell
Sudipta Chakraborty, Budhaditya Majumdar, Michael Heimlich, Karu P. Esselle,
pp.-
Publication Date:2015/11/9
Online ISSN:2188-5079
Summary:
An active inductor based phase-shifter unit cell is proposed. The active inductor is designed with BiCMOS process technology and is implemented with only one heterojunction bipolar transistor and one field-effect transistor without any requirement of complicated transconductance amplifier designs. A phase-shifter unit cell is implemented with a high-pass T-Section with two varactors in series and the active inductor as a shunt. Relative phase variation is achieved by tuning the active inductor or by varying the effective junction capacitance of the varactors. Maximum relative phase variations of 23.7° and 38.6° are achieved at 4 GHz by exclusively tuning the gate voltage and varactor capacitance, respectively. The relative phase variations at 18 GHz are 6.0° and 8.5°, respectively, for the same exclusive conditions.