Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode

In this paper, periodic perturbations are employed on the broad wall of a substrate integrated waveguide (SIW) long slot leaky-wave antenna (LWA) to eliminate the excited unwanted mode. The presence of unwanted mode in the uniform LWA is identified by using the amplitude and phase of the electric fi...

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Autores principales:	Amin Mahmoodi Malekshah, Mohammad Saeed Majedi, Amir Reza Attari
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Periodic perturbations leaky wave antenna substrate integrated waveguide suppressing unwanted mode Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/62451a22d434415681c49fbecfd81ff9
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spelling	oai:doaj.org-article:62451a22d434415681c49fbecfd81ff92021-12-03T00:01:20ZImproved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode2169-353610.1109/ACCESS.2021.3130929https://doaj.org/article/62451a22d434415681c49fbecfd81ff92021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9627713/https://doaj.org/toc/2169-3536In this paper, periodic perturbations are employed on the broad wall of a substrate integrated waveguide (SIW) long slot leaky-wave antenna (LWA) to eliminate the excited unwanted mode. The presence of unwanted mode in the uniform LWA is identified by using the amplitude and phase of the electric field at the slot. Using the electric field data in the structure, propagation constants and amplitudes of desired and unwanted modes are obtained. In order to preserve the desired leaky mode and suppress the unwanted mode, periodic transverse slots are added to one side of the uniform longitudinal slot. Suppressing unwanted mode results in good consistency between the desired and designed radiation characteristics. Comparison between two LWA designs, with and without suppressing unwanted mode, for achieving −25 dB sidelobe level (SLL) and beam direction of 40° at 17 GHz, demonstrates high accuracy of the proposed design procedure. A prototype of the modified antenna is fabricated, and measured results are presented at 16, 17, and 18 GHz for validation.Amin Mahmoodi MalekshahMohammad Saeed MajediAmir Reza AttariIEEEarticlePeriodic perturbationsleaky wave antennasubstrate integrated waveguidesuppressing unwanted modeElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 157623-157627 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Periodic perturbations leaky wave antenna substrate integrated waveguide suppressing unwanted mode Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Periodic perturbations leaky wave antenna substrate integrated waveguide suppressing unwanted mode Electrical engineering. Electronics. Nuclear engineering TK1-9971 Amin Mahmoodi Malekshah Mohammad Saeed Majedi Amir Reza Attari Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
description	In this paper, periodic perturbations are employed on the broad wall of a substrate integrated waveguide (SIW) long slot leaky-wave antenna (LWA) to eliminate the excited unwanted mode. The presence of unwanted mode in the uniform LWA is identified by using the amplitude and phase of the electric field at the slot. Using the electric field data in the structure, propagation constants and amplitudes of desired and unwanted modes are obtained. In order to preserve the desired leaky mode and suppress the unwanted mode, periodic transverse slots are added to one side of the uniform longitudinal slot. Suppressing unwanted mode results in good consistency between the desired and designed radiation characteristics. Comparison between two LWA designs, with and without suppressing unwanted mode, for achieving −25 dB sidelobe level (SLL) and beam direction of 40° at 17 GHz, demonstrates high accuracy of the proposed design procedure. A prototype of the modified antenna is fabricated, and measured results are presented at 16, 17, and 18 GHz for validation.
format	article
author	Amin Mahmoodi Malekshah Mohammad Saeed Majedi Amir Reza Attari
author_facet	Amin Mahmoodi Malekshah Mohammad Saeed Majedi Amir Reza Attari
author_sort	Amin Mahmoodi Malekshah
title	Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
title_short	Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
title_full	Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
title_fullStr	Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
title_full_unstemmed	Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode
title_sort	improved design of uniform siw leaky wave antenna with suppression of unwanted mode
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/62451a22d434415681c49fbecfd81ff9
work_keys_str_mv	AT aminmahmoodimalekshah improveddesignofuniformsiwleakywaveantennawithsuppressionofunwantedmode AT mohammadsaeedmajedi improveddesignofuniformsiwleakywaveantennawithsuppressionofunwantedmode AT amirrezaattari improveddesignofuniformsiwleakywaveantennawithsuppressionofunwantedmode
_version_	1718373990841450496

Improved Design of Uniform SIW Leaky Wave Antenna With Suppression of Unwanted Mode

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