Title :
Design and Applications of a 300–800 MHz Tunable Matching Network
Author :
Sanchez-Perez, Cesar ; de Mingo, Jesus ; Carro, Pedro Luis ; Garcia-Ducar, Paloma
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
In this paper, the optimized design, characterization and applications of a broadband 300-800 MHz (~ 91% fractional bandwidth) digitally-controlled tunable matching network is presented. The design employs PIN diodes as switching components and a repetitive structure of basic cells using lumped reactive elements. After an intensive and complex optimization process, a Smith chart coverage (return losses better than 10 dB and losses lower than 2 dB) above 60% is obtained in all the bandwidth reaching 75% in the middle of the band (400-700 MHz). The potential of the manufactured tunable matching network for antenna mismatch compensation, antenna bandwidth extension and power amplifier efficiency improvement in back-off is showed.
Keywords :
antennas; broadband networks; p-i-n diodes; radio networks; PIN diodes; Smith chart; antenna bandwidth extension; antenna mismatch compensation; complex optimization process; frequency 300 MHz to 800 MHz; frequency 400 MHz to 700 MHz; intensive optimization process; lumped reactive elements; power amplifier; switching components; tunable matching network; Broadband antennas; Broadband communication; Cognitive radio; Impedance matching; PIN photodiodes; Software radio; Tunable circuits and devices; Antenna tuning; impedance matching; load mismatch; tunable matching network;
Journal_Title :
Emerging and Selected Topics in Circuits and Systems, IEEE Journal on
DOI :
10.1109/JETCAS.2013.2280806
