Vol. 100

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2021-08-26

Development of a Low-Profile Broadband Cavity Backed Bow-Tie Shaped Slot Antenna in SIW Technology

By Bollavathi Lokeshwar, Dorai Venkatasekhar, and Jammalamadugu Ravindranadh
Progress In Electromagnetics Research Letters, Vol. 100, 9-17, 2021
doi:10.2528/PIERL21072404

Abstract

A new design of broadband cavity-backed slot antenna (CBSA) based on substrate integrated waveguide (SIW) technology is presented in this paper. An entire proposed antenna is printed on a Rogers RT/Duroid 5870 substrate, which consists of the SIW cavity, bow-tie slot, microstrip line feed. The proper position and size of the bow-tie slot on top of the SIW cavity will generate the cavity modes, which can be merged to obtain the broadband response. Moreover, to understand the effects of the geometric dimensions of the broadband antenna on S11 are examined using parametric study. The final antenna configuration operates on a frequency band ranging from 9.25 GHz to 10.5 GHz with a fractional bandwidth of about 12.65% for the simulation part. The measured bandwidth for S11 is about 12.1% (9.3 GHz to 10.5 GHz). The proposed antenna has a good measured gain of 6 dBi and 6.6 dBi, at 9.55 GHz and 10.35 GHz, respectively. The gain, the reflection coefficient, and the radiation patterns of the fabricated antenna are measured and indicated a very good agreement with simulations.

Citation


Bollavathi Lokeshwar, Dorai Venkatasekhar, and Jammalamadugu Ravindranadh, "Development of a Low-Profile Broadband Cavity Backed Bow-Tie Shaped Slot Antenna in SIW Technology," Progress In Electromagnetics Research Letters, Vol. 100, 9-17, 2021.
doi:10.2528/PIERL21072404
http://jpier.org/PIERL/pier.php?paper=21072404

References