Vol. 103

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2022-04-15

Dual-Band SIW Slot Array Filtering Antenna for X and Ku Band Applications

By Ayyadevara Murali Maruti and Bhavan S. Naga Kishore
Progress In Electromagnetics Research Letters, Vol. 103, 109-117, 2022
doi:10.2528/PIERL22020306

Abstract

In this work, a substrate integrated waveguide slot array filtering antenna for dual band applications is presented. This novel design performs the functions of both a filter and an antenna simultaneously. The main intention of this work is to design a circuit that separates the frequencies in a dual band operation. The antenna is designed as an integration of two parts; the upper part operates at 10.2 GHz while the lower part operates at 16.4 GHz. In each part, an array of five longitudinal slots is incorporated, as well as a SIW antenna with complementary split ring resonators that operate as a band pass filter at the front end. Each slot array antenna is designed for a specific frequency band, and its function depends upon its preceding band pass filter. The two band pass filters allow only signals from the frequency bands for which they are designed, to their corresponding slot array antennas. This technique, along with properly spaced metal vias of the SIW antenna, prevents any leakage and hence reduces interference in dual band operation. Both the band pass filter and the antenna can be built on the same planar board. The antenna is fed through a microstrip to SIW taper transition. CST Microwave Studio software is used for optimization and simulation of the structure. The antenna was built on an RT Duroid 5880 and tested to investigate practical validation. The antenna has a bandwidth of 1.9 GHz, from 9.2 GHz to 11.1 GHz in the X-band, and 2.2 GHz, from 15.6 GHz to 16.9 GHz in the Ku band. The gain pattern is unidirectional in nature and has low side lobe levels of -24 dB and -21 dB at resonant frequencies. A noticeable difference that is greater than 20 dB between co-polarization and cross-polarization is observed. The dimensions of the antenna are 56 mm x 32 mm x 0.508 mm. There is an excellent similarity between the simulated and measured results.

Citation


Ayyadevara Murali Maruti and Bhavan S. Naga Kishore, "Dual-Band SIW Slot Array Filtering Antenna for X and Ku Band Applications," Progress In Electromagnetics Research Letters, Vol. 103, 109-117, 2022.
doi:10.2528/PIERL22020306
http://jpier.org/PIERL/pier.php?paper=22020306

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