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Employing the dumbbell-shaped longitudinal slot antennas in the planar slotted antenna arrays

Published online by Cambridge University Press:  06 August 2021

Mahdi Moradian Open the ORCID record for Mahdi Moradian [Opens in a new window]
Mahdi Moradian*
Affiliation:
Department of Electrical Engineering, Lenjan Branch, Islamic Azad University, Isfahan, Iran
*
Author for correspondence: Mahdi Moradian, E-mail: [email protected]
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Abstract

The dumbbell-shaped longitudinal slot antennas are employed as a replacement for the round-ended longitudinal slot antennas. Each dumbbell-shaped slot is excited by an iris and a septum that have offsets from the waveguide centerlines. All the slots are also cut along the waveguide centerlines. It is demonstrated that the resonant length of the proposed dumbbell-shaped slot antennas is much smaller than the round-ended longitudinal slot antennas. Hence, the end-to-end spacings between the adjacent radiating slots as well as the end-to-end spacings between the coupling and the radiating slots increased noticeably in comparison with the arrays consist of the round-ended longitudinal slot antennas. This fact indicates that one can neglect the mutual coupling between the neighboring slots that are associated with the exciting higher-order modes at the slot positions. To better demonstrate the effectiveness of the proposed dumbbell-shaped slot antennas, a planar array antenna consists of the proposed dumbbell-shaped slot antennas have been designed, implemented, and tested. The measurement and the simulation results confirm the effectiveness of the proposed slot antennas.

Keywords

Butterfly lobesdumbbell-shaped slotsiris excited centerline longitudinal slot antennalongitudinal slot antennaslot Antennas
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 7 , September 2022 , pp. 914 - 925
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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