Cold measurement of a Ka-band Metal PBG waveguide

Author

Thottappan, M. ; Jain, P.K.

Author_Institution

Dept. of Electron. Eng., Indian Inst. of Technol. (Banaras Hindu Univ.), Varanasi, India

fYear

2014

fDate

15-17 Dec. 2014

Firstpage

108

Lastpage

110

Abstract

In this article, we report the design and cold measurement of a Ka-band Metal Photonic Band Gap (MPBG) waveguide with a coupling from an external rectangular waveguide (WR-28) transition using a wraparound co-axial coupler. The metal PBG waveguide was realized by a triangular lattice of metal posts with a defect (removal of seven metal posts) at the center. The circular TE₀₁ travelling electromagnetic mode was supported by this defect portion without any mode competition. The circuit was fabricated and experimentally tested for its cold behavior. The circuit offered a wide band width of ~ 6 % of the centre frequency and this result has been close in agreement with simulations. This metal PBG waveguide circuit is suitable for gyro-TWT as an RF interaction circuit at microwave/millimeter wave higher harmonic operation.

Keywords

photonic band gap; rectangular waveguides; Ka-band metal PBG waveguide; Ka-band metal photonic band gap waveguide; circular TE₀₁ travelling electromagnetic mode; cold measurement; external rectangular waveguide transition; triangular lattice; wraparound co-axial coupler; Electromagnetic waveguides; Lattices; Metals; Microwave circuits; Microwave oscillators; Microwave photonics; Radio frequency; Metal PBG; competing modes; mode suppression; wraparound coupler;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and RF Conference (IMaRC), 2014 IEEE International

Conference_Location

Bangalore

Type

conf

DOI

10.1109/IMaRC.2014.7038982

Filename

7038982