An LC-based tunable low-isolation device for adaptive duplexers

Author

Pourakbar, Mohammadreza ; Tormanen, Markus ; Faulkner, Michael ; Sjoland, Henrik

Author_Institution

Coll. of Eng. & Sci., Victoria Univ., Melbourne, VIC, Australia

fYear

2013

fDate

11-12 Nov. 2013

Firstpage

1

Lastpage

4

Abstract

An LTE-enabled smartphone is a software-defined radio system that must cover a large number of frequency bands with different duplex differences. A proposed adaptive wideband duplexer needs a circulator to create the required initial isolation. To replace this an LC-based tunable low-isolation device is presented in this paper, providing the required tuning range for LTE Band I, II, III and VII. The circuit is implemented in a 130nm Silicon-on-Insulator (SOI) process and provides an isolation exceeding 30dB at both transmit and receive frequencies of each specified LTE frequency band. The insertion loss from PA output to antenna port is below 2dB in LTE band I. The fabricated circuit occupies an area of 2.0mm×1.2mm.

Keywords

Long Term Evolution; mobile antennas; multiplexing equipment; smart phones; LC-based tunable low-isolation device; LTE band; LTE frequency band; LTE-enabled smartphone; SOI process; adaptive wideband duplexer; antenna port; circulator; fabricated circuit; frequency bands; receive frequencies; silicon-on-insulator; software-defined radio system; transmit frequencies; Antennas; Capacitance; Capacitors; Inductors; Radio frequency; Resonant frequency; Switches; Adaptive Duplexer; Cellular phones; Digitally-tuned capacitor banks; LTE; SDR system; Tunable filters;

fLanguage

English

Publisher

ieee

Conference_Titel

NORCHIP, 2013

Conference_Location

Vilnius

Type

conf

DOI

10.1109/NORCHIP.2013.6702035

Filename

6702035