Novel filter design incorporating asymmetrical junction circulators

Author

How, H. ; Vittoria, C. ; Carosella, C.

Author_Institution

Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3500

Lastpage

3502

Abstract

The authors have explored asymmetrical Y-junction circulator designs for narrowband applications. Exact circulation conditions are found for a general asymmetrical circulator. The circulator design allows the input and transmission ports to be at the same angular distance from the isolation port but not necessarily at 120°C. This feature allows the suppression of high-order mode excitations in ferrite disks. This implies that a wide-stopband filter can be realized using asymmetric circulators. Due to the off-resonance bias of the ferrites, this device can be used at high power levels

Keywords

circulators (microwave); ferrite devices; microwave filters; passive filters; solid-state microwave devices; strip line components; asymmetrical Y-junction circulator; asymmetrical junction circulators; ferrite disks; filter design; high-order mode excitation suppression; narrowband applications; off-resonance bias; wide-stopband filter; Circulators; Ferrites; Filling; Filters; Frequency; Green´s function methods; Laboratories; Magnetic fields; Narrowband; Stripline;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42348

Filename

42348