Design of an Interdigital Diplexer for RF Front-End

Tunable Diplexer for Cognitive Radio RF Front-end Modules

This paper describes the design and measurement of a varactor-tuned planar diplexer for reconfigurable multi-mode/multi-standard transceiver front-end modules. The proposed diplexer of 3 cm × 1.8 cm is composed of two tunable dual-mode bandpass filters with two varactor diodes. The diplexer channels are 8.8% relative bandwidth at 2.48 and 3.2 GHz for 25 V biased voltage, while 7.5% and 4.1% are...

Design of RF Diplexer for Mobile Communication

In this paper, a matching circuit for RF diplexer for mobile communication is proposed. Most wanted bands in wireless technologies like GSM and DCS is used. Both bands are designed by using stepped impedance resonators with single order and matching between this two are implemented by Yjunction method. Cutoff frequency for GSM and DCS band are 925 MHz and 1795 MHz. Microstrip Technology is prop...

Integrated Active Antenna Approach for Rf Front-end Design

Kevin M. K. H. Leong Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA Ji-Yong Park Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA Tatsuo Itoh Department of Electrical Engineering, University of California, Los Angeles, 405 Hilgard Avenue, Los An...

RF front-end CMOS design for build-in-self-test

Simplifying RF front-end design in multiband handsets

R uthless competition in the handset market continues to drive manufacturers to search for new opportunities to drive down cost, printed circuit board (PCB) area and power consumption. Simultaneously, the rollout of third-generation (3G) networks has opened the door to a variety of new multimedia and data-based applications, from wireless Internet access and mobile video to text messaging and m...