Bandwidth enhancement of substrate integrated waveguide cavity backed slot antenna by offset feeding technique

Author

Mukherjee, Soumava ; Biswas, Animesh ; Srivastava, Kumar Vaibhav

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India

fYear

2013

Firstpage

1

Lastpage

2

Abstract

In this paper, a novel technique to enhance the bandwidth of substrate integrated waveguide cavity backed slot antenna is demonstrated. The feeding technique to the cavity backed antenna has been modified by introducing offset feeding of microstrip line along with microstrip to grounded coplanar waveguide transition which helps to excite TE₁₂₀ mode in the cavity and also to get improvement in impedance matching to the slot antenna simultaneously. The proposed antenna is designed to resonate in X band (8-12 GHz) and shows a resonance at 10.2 GHz with a bandwidth of 4.2% and a gain of 5.6 dBi, 15.6 dB front to back ratio and -30 dB maximum cross polarization level.

Keywords

antenna feeds; coplanar waveguides; electromagnetic wave polarisation; impedance matching; microstrip transitions; microwave antennas; slot antennas; substrate integrated waveguides; TE₁₂₀ mode; bandwidth enhancement; frequency 8 GHz to 12 GHz; gain -30 dB; gain 15.6 dB; impedance matching; maximum cross polarization level; microstrip line; microstrip to grounded coplanar waveguide transition; offset feeding technique; substrate integrated waveguide cavity backed slot antenna; Antenna feeds; Bandwidth; Cavity resonators; Microstrip antennas; Slot antennas; Substrates; Bandwidth enhancement; SIW Cavity; Slot Antenna; Substrate Integrated Waveguide (SIW);

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetics Conference (AEMC), 2013 IEEE

Conference_Location

Bhubaneswar

Print_ISBN

978-1-4799-3266-5

Type

conf

DOI

10.1109/AEMC.2013.7045029

Filename

7045029