Practical design of wide-stopband filters utilizing asymmetric circulators

Author

How, H. ; Liu, Y. ; Zhang, S. ; Vittoria, C. ; West, R. ; Carosella, C. ; Folen, V.

Author_Institution

Northeastern Univ., Boston, MA, USA

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5474

Lastpage

5476

Abstract

Wide-stopband filters in which the stopbands extend two octaves of the fundamental transmission frequencies have been realized in terms of asymmetrical Y-junction circulator designs. These filters have been tested at microwave frequencies from 0.05 to 18 GHz. The calculated biasing field requirement, insertion loss, isolation, and stopband frequency range are in reasonable agreement with the corresponding measured values. Since this filter is an off-resonant device, high power handling capability may be assumed. The filters show two octaves of stopband and, hence, can be used extensively as stopband filters in radome applications

Keywords

band-stop filters; circulators (microwave); microwave filters; 0.05 to 18 GHz; Y-junction circulator designs; asymmetric circulators; biasing field requirement; fundamental transmission frequencies; insertion loss; isolation; off-resonant device; power handling capability; radome applications; stopband frequency range; wide-stopband filters; Circulators; Dielectric materials; Ferrimagnetic materials; Ferrites; Filling; Filters; Frequency; Geometry; Magnetic materials; Wires;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278875

Filename

278875