Dual-band-rejection filter for distortion reduction in RF transmitters

A novel concept of dual-band-rejection filter (DBRF) is proposed with its circuit synthesis procedure and examples of its realization with dielectric resonators and microstrip resonators. A DBRF can make two closely spaced rejection bands and a passband between them, with lower loss than a bandpass...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2004-11, Vol.52 (11), p.2550-2556
Main Authors: Uchida, H., Kamino, H., Totani, K., Yoneda, N., Miyazaki, M., Konishi, Y., Makino, S., Hirokawa, J., Ando, M.
Format: Article
Language:English
Subjects:
Applied sciences
Band pass filters
Bandstop (rejection) filters
Circuit properties
Circuit synthesis
dielectric resonators
Dielectrics
dual band
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency filters
Frequency synthesizers
Microstrip filters
Microstrip resonators
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Passband
Radio frequency
Resonator filters
Transmitters
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Summary:A novel concept of dual-band-rejection filter (DBRF) is proposed with its circuit synthesis procedure and examples of its realization with dielectric resonators and microstrip resonators. A DBRF can make two closely spaced rejection bands and a passband between them, with lower loss than a bandpass filter having the same number of resonators and the same frequency selectivity just around the passband. The DBRF can be synthesized by applying novel frequency-variable transformations to a prototype LPF, and its physical size can be smaller than a simple cascade of two conventional band-rejection filters with different rejection bands. The DBRF can be especially applicable to distortion reduction filter in RF transmitters.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2004.837161