Waveguide Slot Array Design With Compensation for Higher Order Mode Coupling Between Inclined Coupling Slots and Neighboring Radiating Slots

Coetzee, Jacob; Sheel, Soumya

doi:10.1109/tap.2018.2876118

Cited by 13 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to these effects, in [83], an efficient design procedure is described that is able to compensate for higher-order mode coupling between inclined coupling slots and neighboring radiating slots. This compensation is obtained with only a minimal cost to the design complexity and consists of adding closed-form terms to the expression for the active admittance of radiating slots.…”

Section: Interaction Between the Beam-forming Network And The Radiating Waveguidesmentioning

confidence: 99%

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

et al. 2021

View full text Add to dashboard Cite

Planar waveguide slot arrays (WSAs) have been used since 1940 and are currently used as performing antennas for high frequencies, especially in applications such as communication and RADAR systems. We present in this work a review of the most typical waveguide slot array configurations proposed in the literature, describing their main limitations and drawbacks along with possible effective countermeasures. Our attention has been focused mainly on the improved available design techniques to obtain high performance WSAs. In particular, the addressed topics have been reported in the following. Partially filled WSAs, or WSAs covered with single or multilayer dielectric slabs, are discussed. The most prominent second-order effects in the planar array feeding network are introduced and accurately modeled. The attention is focused on the T-junction feeding the array, on the effect of interaction between each slot coupler of the feeding network and the radiating slots nearest to this coupler, and on the waveguide bends. All these effects can critically increase the first sidelobes if compared to the ideal case, causing a sensible worsening in the performance of the array.

show abstract

Section: Interaction Between the Beam-forming Network And The Radiating Waveguidesmentioning

confidence: 99%

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This reconstruction approach is in contrast to frequency scanning antennas with which only one direction at a time is investigated by the electromagnetic radiation with a high gain beam, thus minimizing the influence of other targets or static reflectors located in neighbouring directions. The classic frequency scanning linear array antenna is the slotted waveguide array antenna, initially proposed in [10] and more recently revisited in [11][12][13][14][15][16][17]. The main drawback of this kind of antenna is its bulkiness, a characteristic that is not always acceptable.…”

Section: Introductionmentioning

confidence: 99%

Analysis and modelling of rampart line antennas

Sacco

Caytan

Pisa

et al. 2021

IET Microwaves Antenna & Prop

View full text Add to dashboard Cite

A new, efficient, and accurate analytical model is introduced for estimating the beam direction of rampart line antennas with microstrip radiators that can change beam direction with feeding frequency. The model takes its origins from 1-D array theory, in which the bends represent the radiating elements, and the interconnecting lines represent the phase shifters. A mathematical expression accounting for the equivalent length of the bends for the correct estimation of the distance between the radiators is introduced. The model was tested for various substrate relative permittivity values ranging from 2.9 to 6.45. This model can be used for arbitrary rampart line configurations by providing the equivalent dipole direction, depending on the orientation of the bends. An alternative geometry was proposed to reduce the coupling between the parallel line segments. A prototype operating in a bandwidth of 1 GHz around 7.8 GHz was realized on a Rogers RO4350B high-frequency laminate with a thickness of 1.524 mm. Both the radiation pattern and the reflection coefficient were measured and show a good agreement with the proposed analytical model and commercial full-wave simulation tool results.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

show abstract

“…Although they have promising features, such as low profile, low cost, and fabrication ease, their low-power handling capacity and high losses often make them less suitable for marine radar [ 18 , 19 , 20 ]. Consequently, the slotted waveguide array (SWA) antennas [ 21 , 22 , 23 , 24 , 25 ], based on the pioneering work published by Elliot [ 26 , 27 , 28 ], are widely employed in marine radar applications. This is because of their high-power handling capacity, low losses, and good phase stability.…”

Section: Introductionmentioning

confidence: 99%

Compact Slotted Waveguide Antenna Array Using Staircase Model of Tapered Dielectric-Inset Guide for Shipboard Marine Radar

Anim

Diawuo

Jung

2021

Sensors

View full text Add to dashboard Cite

This paper presents a new configuration of a slotted waveguide antenna (SWA) array aimed at the X-band within the desired band of 9.38~9.44 GHz for shipboard marine radars. The SWA array, which typically consists of a slotted waveguide, a polarizing filter, and a metal reflector, is widely employed in marine radar applications. Nonetheless, conventional slot array designs are weighty, mechanically complex, and geometrically large to obtain high performances, such as gain. These features of the conventional SWA are undesirable for the shipboard marine radar, where the antenna rotates at high angular speed for the beam scanning mechanism. The proposed SWA array herein reduces the conventional design’s size by 62% using a tapered dielectric-inset guide structure. It shows high gain performance (up to 30 dB) and obtains improvements in radiation efficiency (up to 80% in the numerical simulations) and weight due to the use of loss and low-density dielectric material.

show abstract

Waveguide Slot Array Design With Compensation for Higher Order Mode Coupling Between Inclined Coupling Slots and Neighboring Radiating Slots

Cited by 13 publications

References 18 publications

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

Analysis and modelling of rampart line antennas

Compact Slotted Waveguide Antenna Array Using Staircase Model of Tapered Dielectric-Inset Guide for Shipboard Marine Radar

Contact Info

Product

Resources

About