Title :
Automatic antenna tuning for RF transmitter IC applying high Q antenna
Author :
Zólomy, Attila ; Mernyei, Ferenc ; Erdélyi, János ; Pardoen, Matthijs ; Tóth, Gábor
Author_Institution :
Integration Hungary Ltd, Budapest, Hungary
Abstract :
Automatic antenna tuning circuitry is presented for high Q printed antennas. It is applied in a general purpose 0.6 μm BiCMOS transmitter chip devoted to short range applications in the ISM bands (315, 434, 868 and 915 MHz). The circuitry maintains maximum output power without the application of external matching circuit and/or costly tuning procedures usually required to counter technological spreading. Real time compensation of environmental variations such as "hand effect" is also possible. As the efficiency of the driver stage is close to maximum with high Q antennas, the power consumption is reduced at the targeted output power ranges (-20...+10 dBm).
Keywords :
BiCMOS integrated circuits; Q-factor; UHF antennas; UHF integrated circuits; circuit tuning; compensation; environmental degradation; integrated circuit measurement; microstrip antennas; radio transmitters; transmitting antennas; 0.6 micron; 315 MHz; 434 MHz; 868 MHz; 915 MHz; ISM bands; RF transmitter IC; automatic antenna tuning circuitry; bill of material; driver stage efficiency; general purpose BiCMOS transmitter chip; hand effect; high Q antenna; maximum output power; power consumption; real time environmental variations compensation; short range applications; targeted output power ranges; technological spreading; tuning procedures; BiCMOS integrated circuits; Circuit optimization; Counting circuits; Driver circuits; Energy consumption; Power generation; Radio frequency; Radiofrequency integrated circuits; Transmitters; Transmitting antennas;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE
Print_ISBN :
0-7803-8333-8
DOI :
10.1109/RFIC.2004.1320666
