DocumentCode
2151088
Title
CMOS antenna tuning unit for 2.4 GHz ISM band
Author
Sjoblom, Peter ; Sjoland, Henrik
Author_Institution
Dept. of Electroscience, Lund Univ., Sweden
fYear
2005
fDate
12-17 June 2005
Abstract
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.
Keywords
CMOS integrated circuits; UHF antennas; circuit tuning; impedance matching; switched capacitor networks; 0.35 micron; 1 dB; 2.4 GHz; 3 dB; CMOS circuits; ISM band; antenna matching; antenna tuning unit; capacitor banks; external series inductors; impedance matching; reconfigurable matching; switched shunt capacitors; Adaptive arrays; Bonding; Circuit optimization; Impedance; Inductors; Shunt (electrical); Switched capacitor circuits; Switches; Switching circuits; Wires;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 2005 IEEE MTT-S International
ISSN
01490-645X
Print_ISBN
0-7803-8845-3
Type
conf
DOI
10.1109/MWSYM.2005.1516580
Filename
1516580
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