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

fYear

2004

fDate

6-8 June 2004

Firstpage

501

Lastpage

504

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers. 2004 IEEE

ISSN

1529-2517

Print_ISBN

0-7803-8333-8

Type

conf

DOI

10.1109/RFIC.2004.1320666

Filename

1320666