Design of Slotted Waveguide Antennas With Low Sidelobes for High Power Microwave Applications

Misilmani, Hilal M. El; Al‐Husseini, Mohammed; Kabalan, Karim Y.

doi:10.2528/pierc14121903

Cited by 43 publications

(26 citation statements)

References 14 publications

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“…The first one is to tilt the slots by a different angle, and the second one is to have an offset ( x 0 ) different from 0. Numerous examples of the last strategy can be found in the scientific literature, for instance, in Kenji and Bender (), Misilmani et al (), and Theron and Cloete (). This is the solution adopted in this work.…”

Section: Antenna Element Designmentioning

confidence: 99%

Slotted ESIW Antenna With High Efficiency for a MIMO Radar Sensor

Miralles

Belenguer²,

Mateo³

et al. 2018

Radio Science

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This paper introduces a slotted empty substrate integrated waveguide (ESIW) antenna for a multiple‐input multiple‐output (MIMO) radar sensor. The proposed system is based on the MIMO radar architecture. Orthogonal signals are sent from the transmitters, in such a manner that a MIMO image reconstruction is possible. The presented system application targets the surveillance of strategic areas in gas pipelines and nuclear plants. ESIW technology enables a high‐efficiency, low‐profile, and compact antenna for these MIMO systems. The fabricated device includes a transition to microstrip line, and, in consequence, the antenna can be integrated with the rest of the system in a standard integrated circuit. The slotted ESIW antenna design and measured results for the targeted application are presented in this paper. The measured results present a gain greater than 15 dBi and return loss below −13 dB over the targeted frequency band of operation (16–16.5 GHz). To the best of the authors' knowledge, this is the first slotted ESIW antenna reported in the scientific literature up to now.

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Section: Antenna Element Designmentioning

confidence: 99%

Slotted ESIW Antenna With High Efficiency for a MIMO Radar Sensor

Miralles

Belenguer²,

Mateo³

et al. 2018

Radio Science

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“…In this work, we present a complete and efficient design procedure for planar SWAs. The proposed method uses simplified closed‐form equations to determine the slots nonuniform displacements, without the need to use optimization algorithms 29,30 . A major contribution lies in the use of the same proposed simplified equations to design both the radiating and feeder SWAs.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed method uses simplified closed-form equations to determine the slots nonuniform displacements, without the need to use optimization algorithms. 29,30 A major contribution lies in the use of the same proposed simplified equations to design both the radiating and feeder SWAs. Longitudinal coupling slots are proposed for the feeder SWA, displaced from the waveguide feed centerline according to the desired SLR, rather than the conventional inclined coupling slots.…”

mentioning

confidence: 99%

Design procedure for planar slotted waveguide antenna arrays with controllable sidelobe level ratio for high power microwave applications

Misilmani

Al‐Husseini

Kabalan

2020

Engineering Reports

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This article presents a complete design procedure for planar slotted waveguide antennas (SWA). For a desired sidelobe level ratio (SLR), the proposed method provides a pencil shape pattern with a narrow half power beamwidth, which makes the proposed system suitable for high power microwave applications. The proposed planar SWA is composed of only two layers, and uses longitudinal coupling slots rather than the conventional inclined coupling slots. For a desired SLR, the slots excitation in the radiating and feeder SWAs are calculated based on a specified distribution. Simplified closed-form equations are then used to determine the slots nonuniform displacements, for both the radiating and feeder SWAs, without the need to use optimization algorithms. Using simplified equations, the slots lengths, widths, and their distribution along the length of the radiating and feeder SWAs can be found. The feeder dimensions and slots positions are deduced from the dimensions and total number of the radiating SWAs. An 8 × 8 planar SWA has been designed and tested to show the validity of the proposed method. The obtained measured and simulated results are in accordance with the design objectives. K E Y W O R D S antenna arrays, high power microwave applications, slotted waveguide antennas, sidelobe level ratio 1 INTRODUCTION High power microwave (HPM) technology is well known in both military and commercial applications. 1 An efficient antenna to be used as the radiating system for these applications is required to have a well directive pattern, large sidelobe level ratio (SLR), and high gain. It should also have high power handling capability required to extract the HPMs from their source. Slotted waveguide antennas (SWA) 2 are taking a major interest in this field, with their major ability of beam pointing and HPM handling capability. 3 SWAs can be also directly connected to Reltron HPM sources, without the need for additional mode converter, which makes them suitable for HPM applications. SWAs are also used in wireless technologies, maritime, and space applications. SWAs are made of rectangular waveguides, having slots cuts used to radiate the energy. 4 The conventional cuts have a rectangular shape. The slots can be made either on the broadwall or the narrow wall of the waveguide, with the most This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…AFSIW slot array antenna design: The implementation of slot array antennas based on RWG has been studied by Elliot in [4] and Stevenson in [5]. Recently, [6,7] have proposed simplified design equations. Hence, using those equations, and by neglecting the influence of AFSIW dielectric slabs, in which the TE 10 mode E-field is weak [3], the design of AFSIW antennas is quite straight forward.…”

mentioning

confidence: 99%

“…From the design equations provided in [6,7], the AFSIW slot array antenna dimensions are determined. Then, fine tuning, considering the dielectric slabs, is achieved using CST microwave studio electromagnetic software.…”

mentioning

confidence: 99%

Millimetre‐wave air‐filled substrate integrated waveguide slot array antenna

et al. 2017

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An air-filled substrate integrated waveguide (AFSIW) slot array antenna based on multilayer PCB process is proposed. For comparison and demonstration purposes, 1 × 4 slot array antennas based on both AFSIW and conventional dielectric-filled SIW (DFSIW) operating at 30.5 GHz are designed, fabricated and measured. The exampled AFSIW 1 × 4 slot array antenna achieves 44 and 18% narrower measured H-plane and E-plane half-power beamwidth, respectively, and simulated radiation efficiency improved by 1.6%, resulting in an overall measured gain improvement of 3.5 dB compared with its DFSIW counterpart. This antenna is of high interest for the design of efficient arrays based on high-performance AFSIW feeding network.

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Design of Slotted Waveguide Antennas With Low Sidelobes for High Power Microwave Applications

Cited by 43 publications

References 14 publications

Slotted ESIW Antenna With High Efficiency for a MIMO Radar Sensor

Slotted ESIW Antenna With High Efficiency for a MIMO Radar Sensor

Design procedure for planar slotted waveguide antenna arrays with controllable sidelobe level ratio for high power microwave applications

Millimetre‐wave air‐filled substrate integrated waveguide slot array antenna

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