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Design Analog FIR Filter for UWB Frequency Band
UWB technology has drawn great attention after it was regulated in February 2002 in the USA by the FCC1 and in February 2007 in the EU. What makes UWB systems unique is their large instantaneous bandwidth where up to 7.5GHz in the USA or 2.5GHz in the EU are license-free operation for commercial systems. In recent years, more interest has been put into UWB technology worldwide from both industrial and academic research. However, there are still challenges in making this technology live up to its full potential. The FIR filter principle is widely used in DSP, for the realization of filter responses with prescribed frequency behavior. But only relatively few efforts have been made to produce a broadband analog FIR filter circuit for the microwave frequency range. The objective of this thesis is to develop a principle design of an analog FIR filter, which operates over the complete UWB band. In the course of the research different FIR filter concepts were studied and as a result several microwave components for UWB wireless communications applications were developed, in particular the new active node topology which replaces the earlier traveling wave topology in our FIR filter circuit. The final design was fabricated in MIC technology, and measurement results proved the possibility of building analog FIR filters in this technology and also validated the simulation results. Based on the characterization results for the active node prototype, designs for different applications for the analog FIR filter are presented such as adaptive analog filltering where a tunable analog filter is designed which operates over the complete UWB band and supports all filter types (highpass,lowpass, bandpass and bandstop). Eachfilter type is proven with a design example which tries to achieve useful results with a minimum filter order, thus keeping the circuit layout compact: The weighting coeffcients with small values (close to 0) are omitted, but the delay line continues for the next nonzero coeffcients. Another application is in ...
Design Analog FIR Filter for UWB Frequency Band
UWB technology has drawn great attention after it was regulated in February 2002 in the USA by the FCC1 and in February 2007 in the EU. What makes UWB systems unique is their large instantaneous bandwidth where up to 7.5GHz in the USA or 2.5GHz in the EU are license-free operation for commercial systems. In recent years, more interest has been put into UWB technology worldwide from both industrial and academic research. However, there are still challenges in making this technology live up to its full potential. The FIR filter principle is widely used in DSP, for the realization of filter responses with prescribed frequency behavior. But only relatively few efforts have been made to produce a broadband analog FIR filter circuit for the microwave frequency range. The objective of this thesis is to develop a principle design of an analog FIR filter, which operates over the complete UWB band. In the course of the research different FIR filter concepts were studied and as a result several microwave components for UWB wireless communications applications were developed, in particular the new active node topology which replaces the earlier traveling wave topology in our FIR filter circuit. The final design was fabricated in MIC technology, and measurement results proved the possibility of building analog FIR filters in this technology and also validated the simulation results. Based on the characterization results for the active node prototype, designs for different applications for the analog FIR filter are presented such as adaptive analog filltering where a tunable analog filter is designed which operates over the complete UWB band and supports all filter types (highpass,lowpass, bandpass and bandstop). Eachfilter type is proven with a design example which tries to achieve useful results with a minimum filter order, thus keeping the circuit layout compact: The weighting coeffcients with small values (close to 0) are omitted, but the delay line continues for the next nonzero coeffcients. Another application is in ...
Design Analog FIR Filter for UWB Frequency Band
Arafat, Saeed (Autor:in) / Solbach, Klaus
23.03.2015
Hochschulschrift
Elektronische Ressource
Englisch
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