Title :
CMOS antenna tuning unit for 2.4 GHz ISM band
Author :
Sjoblom, Peter ; Sjoland, Henrik
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
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;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516580
