Photonics-based interference mitigation filters

Author

Minasian, Robert A. ; Alameh, Kamal E. ; Chan, Erwin H W

Author_Institution

Sch. of Electr. & Inf. Eng., Sydney Univ., NSW, Australia

Volume

49

Issue

10

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

1894

Lastpage

1899

Abstract

New photonic filter structures for interference mitigation of microwave signals are presented. These fiber filters have a parallel topology, and comprise a grating based photonic bandpass filter, or a dual offset cavity structure based on a new noncommensurate delay-line approach. The new topologies overcome the problem of synthesizing both a narrow stopband and a very-wide and flat passband, to simultaneously excise interference with minimal impact on the wanted signal over a wide microwave range. Results demonstrate stopbands of around 1% of center frequency, wide-band flat transmission, and a shape factor of 10.5 that is the lowest reported for a photonic notch filter, in excellent agreement with predictions

Keywords

band-pass filters; interference suppression; microwave photonics; notch filters; optical delay lines; optical fibre filters; optical fibre networks; dual offset cavity structure; fiber filters; grating based photonic bandpass filter; microwave signals; noncommensurate delay-line approach; notch filter; parallel topology; photonics-based interference mitigation filters; shape factor; stopbands; wide-band flat transmission; Band pass filters; Delay; Fiber gratings; Frequency; Interference; Microwave filters; Passband; Signal synthesis; Topology; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.954804

Filename

954804