CMOS antenna tuning unit for 2.4 GHz ISM band

Summary, in English

Antenna matching is improved with adaptive 0.35 μm CMOS circuits based on switched shunt capacitors arranged in capacitor banks and external series inductors. The simulated circuits are optimized for the ISM 2.4 GHz band. The circuits provide a VSWR ⩽ 2 match for every impedance with VSWR ⩽ 5. There is a 1 dB power loss for a perfect 50 Ω → 50 Ω transformation, a break-even point at VSWR = 1.5, and a 3dB increase in delivered power for VSWR = 4.3

• Author: Peter Sjöblom; Henrik Sjöland
• Department/s: Department of Electrical and Information Technology
• Publishing year: 2005
• Language: English
• Pages: 279-282
• Publication/Series: 2005 IEEE MTT-S International Microwave Symposium
• Links: http://dx.doi.org/10.1109/MWSYM.2005.1516580
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Electrical Engineering, Electronic Engineering, Information Engineering
• Keywords: 1 dB; 3 dB; 2.4 GHz; 0.35 micron; reconfigurable matching; impedance matching; external series inductors; capacitor banks; switched shunt capacitors; antenna matching; ISM band; CMOS circuits; antenna tuning unit
• Conference name: 2005 IEEE MTT-S International Microwave Symposium
• Conference date: 2005-06-12 - 2005-06-17
• Conference place: Long Beach, CA, United States
• Status: Published
• ISBN/ISSN/Other: ISBN: 0-7803-8845-3