Journal article
Tunable ferroelectric impedance matching networks and their impacton digital modulation system performance
Publication Details
Authors: | Gonzalez-Rodriguez, E.; Maune, H.; Yuliang, Z.; Lufei, S.; Shah, I.; Dahlhaus, D.; Hofmann, K.; Jakoby, R. |
Publication year: | 2013 |
Journal: | International Journal of Electronics and Communications |
Pages range : | 1107-1117 |
Volume number: | 67 |
ISSN: | 1434-8411 |
eISSN: | 1618-0399 |
DOI-Link der Erstveröffentlichung: |
Abstract
In this paper the bit error rate performance and error vector magnitude of a tunable impedance matching network is analyzed assuming QPSK, 16-QAM and 64-QAM digital modulation schemes. The characterized tunable impedance matching network is based on barium–strontium–titanate ferroelectric thick-film varactors. Inherent dispersive behavior is subsumed into the forward transmission of the passive device. Due to this nonlinear phase response, in general to maximize the overall system performance, an agile tuning of the varactor values is demonstrated, taking into account the phase and group delay ofs21parameter. Detailed signal simulation results based on measured data of a testbed are presented. The influence of varying matched impedances on the tuning behavior with different modulation bandwidths is discussed at a center frequency of 1.9GHz.
In this paper the bit error rate performance and error vector magnitude of a tunable impedance matching network is analyzed assuming QPSK, 16-QAM and 64-QAM digital modulation schemes. The characterized tunable impedance matching network is based on barium–strontium–titanate ferroelectric thick-film varactors. Inherent dispersive behavior is subsumed into the forward transmission of the passive device. Due to this nonlinear phase response, in general to maximize the overall system performance, an agile tuning of the varactor values is demonstrated, taking into account the phase and group delay ofs21parameter. Detailed signal simulation results based on measured data of a testbed are presented. The influence of varying matched impedances on the tuning behavior with different modulation bandwidths is discussed at a center frequency of 1.9GHz.
