Title :
Harmonic balance algorithm to model nonlinear effects in HTS filters subject to CDMA signals
Author :
Mateu, J. ; Collado, C. ; O´Callaghan, J.M.
Author_Institution :
Telecommun. Technol. Center of Catalonia, Barcelona, Spain
Abstract :
We discuss an harmonic balance algorithm to analyze High Temperature Superconducting (HTS) circuits subject to wideband signals, such as the ones used in CDMA wireless systems. Undersampling is used to discretize and down-convert the bandpass signal resulting from the weak HTS nonlinearities, and this has to be taken into account when performing time-domain calculations of the nonlinear effects. We present an overview of the algorithm and describe an example to verify the software developed. We also discuss a tentative performance assessment of an HTS preselect filter in a UMTS base station receiver.
Keywords :
3G mobile communication; UHF filters; cellular radio; code division multiple access; equivalent circuits; high-temperature superconductors; impedance matrix; intermodulation; microstrip filters; microstrip resonators; nonlinear network analysis; passive filters; resonator filters; superconducting filters; superconducting microwave devices; superconducting resonators; 3G CDMA signals; CDMA wireless systems; HTS circuits; HTS filters; HTS preselect filter; UMTS base station receiver; harmonic balance algorithm; high temperature superconducting circuits; nonlinear effects modelling; time-domain calculations; two-tone intermodulation; undersampling; weak HTS nonlinearities; wideband signals; Algorithm design and analysis; Band pass filters; Circuits; Harmonic analysis; High temperature superconductors; Multiaccess communication; Power harmonic filters; Signal analysis; Superconducting filaments and wires; Superconducting filters;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210997
