Nonlinear distortion in a 8-pole quasi-elliptic bandpass HTS filter for CDMA system

High Temperature Superconductor materials are known to produce intermodulation and other nonlinear effects which may restrict their use in wireless communication systems. Quantifying this degradation is crucial in determining if the use of HTS filters in the receiver is beneficial. In this work we u...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.992-995
Main Authors: Collado, C., Mateu, J., Menendez, O., O'Callaghan, J.M.
Format: Article
Language:English
Subjects:
Applied sciences
Band pass filters
Broadband
Capacitors. Resistors. Filters
Circuit properties
Circuit simulation
Degradation
Distortion
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electronic circuits
Electronics
Equivalent circuit
Equivalent circuits
Exact sciences and technology
Frequency filters
High temperature superconductors
HTS filters
Intermodulation
Multiaccess communication
Nonlinear distortion
nonlinearities
Nonlinearity
Simulation
Superconducting filters
Superconducting materials
Superconductivity
superconductor
Various equipment and components
Wireless communication
Wireless communication systems
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Summary:High Temperature Superconductor materials are known to produce intermodulation and other nonlinear effects which may restrict their use in wireless communication systems. Quantifying this degradation is crucial in determining if the use of HTS filters in the receiver is beneficial. In this work we use an approach for representing the HTS filter nonlinear equivalent circuit and simulating its performance. We have tested the approach on a planar, 8-pole quasielliptic (QE) filter, showing agreement between simulations and measurements of intermodulation products (IMD). The nonlinear equivalent circuit is then used to predict the nonlinear behavior of the filter and its effects on system parameters when it is subject to broadband signals like those used in wireless communication systems.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2005.850165