Narrowband Substrate Integrated Waveguide Isolators

Author

Yu Jian Cheng ; Qiu Dong Huang ; Yi Ran Wang ; Li, Joshua Le-Wei

Author_Institution

EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

24

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

698

Lastpage

700

Abstract

In this letter, two types of X-band ferrite-loaded isolators are proposed based on the substrate integrated waveguide (SIW) technology. First, a full-height E-plane ferrite slab is used to construct low-loss and high-isolation SIW isolators. The insertion loss is less than 2.2 dB and the isolation coefficient is larger than 30 dB within 400 MHz bandwidth. Then, a surface ferrite-loaded isolator is developed to simplify machining process. The ferrite slabs are mounted on the top and bottom surfaces of the SIW, but not inserted into rectangular holes within the SIW. The insertion loss is less than 3.2 dB ranging from 9.79 to 10.4 GHz. Both the return loss and isolation coefficient are better than 20 dB over the same frequency range.

Keywords

ferrite isolators; substrate integrated waveguides; X-band ferrite-loaded isolators; bandwidth 400 MHz; frequency 9.79 GHz to 10.4 GHz; full-height E-plane ferrite slab; high-isolation SIW isolators; insertion loss; isolation coefficient; machining process; narrowband substrate integrated waveguide isolators; rectangular holes; return loss; surface ferrite-loaded isolator; Ferrites; Insertion loss; Isolators; Saturation magnetization; Slabs; Substrates; Surface waves; Ferrite-loaded; isolator; substrate integrated waveguide (SIW);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2344440

Filename

6877729