Title :
A comparison of tunable ferroelectric Π- and T-matching networks
Author :
Schmidt, Matthias ; Lourandakis, Errikos ; Leidl, Anton ; Seitz, Stefan ; Weigel, Robert
Author_Institution :
Univ. of Erlangen-Nuremberg, Erlangen
Abstract :
A comparison of tunable pi - and T-matching networks based on ferroelectric capacitors is presented. Both topologies are promising candidates for automated antenna tuners in mobile communication systems. Assets and drawbacks of both circuits are discussed comparing linear and nonlinear simulations and measurements of two exemplary circuits at 850 MHz. The requirements to achieve sufficient linearity are determined by means of simulations. Both matching networks cover an impedance range of approximately |Gammain| les 0.6 with a maximum transducer power loss of 4 dB and 6 dB, respectively.
Keywords :
circuit simulation; circuit tuning; ferroelectric capacitors; mobile antennas; mobile communication; mobile radio; nonlinear equations; automated antenna tuners; ferroelectric capacitors; frequency 850 MHz; linear circuit simulations; loss 4 dB; loss 6 dB; mobile communication devices; mobile communication systems; nonlinear circuit simulations; transducer power loss; tunable T-matching networks; tunable ferroelectric pi networks; Antenna measurements; Capacitors; Circuit simulation; Circuit topology; Ferroelectric materials; Mobile antennas; Mobile communication; Network topology; Tunable circuits and devices; Tuners;
Conference_Titel :
Microwave Conference, 2007. European
Conference_Location :
Munich
Print_ISBN :
978-2-87487-001-9
DOI :
10.1109/EUMC.2007.4405135
