Title :
Frequency-tunable antenna by input-impedance-tunable CMOS RF-frontend
Author :
Haider, Nadia ; Oude Alink, Mark S. ; Caratelli, Diego ; Klumperink, Eric A. M. ; Yarovoy, Alexander G.
Author_Institution :
Microwave Sensing, Signals & Syst., Delft Univ. of Technol., Delft, Netherlands
Abstract :
Variable-impedance matching between the antenna and the RF-frontend provides several potential advantages, including changing operational frequency, compensating for unintentional mismatch, improving scanning capability, and reducing noise and interference signal levels. In this article a concept of tuning the operational band of an antenna by variable-impedance matching is presented. In this investigation a 65 nm CMOS RF-frontend capable of changing its input-impedance is used to tune the operational band of a microstrip antenna. It is shown that by properly selecting the input-impedance of the RF-frontend, the operating frequency of the antenna can be shifted, which increases the total operational bandwidth from 10 MHz to more than 30 MHz.
Keywords :
CMOS integrated circuits; impedance matching; microstrip antennas; radiofrequency integrated circuits; CMOS RF-frontend; frequency-tunable antenna; microstrip antenna; operational band; size 65 nm; variable-impedance matching; Bandwidth; CMOS integrated circuits; Impedance; Impedance matching; Microstrip antennas; CMOS; RF-frontend antenna; frequency tuning; variable impedance;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2013 European
Conference_Location :
Nuremberg
