Performance of cross-polarization filter dedicated for slotted waveguide antenna array

Mazur, Mateusz; Wiśniewski, J.

doi:10.1109/radar.2010.5494409

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…The optimal taper profile of the dielectric in Figure 6 with the staircase model has geometrical parameters fixed as follows: ∆ w = 4 mm, H 2 = 39.48 mm, H 3 = 36. 33 The instantaneous phase of the radiation field from the dielectric surface with no taper profile received at points A, B, and C, assumed to be within the far-field region from the antenna, i.e., = 2 / (maximum linear dimension of an antenna is D), is shown in Figure 7a. It can be noted that there is a significant phase difference between the received fields at these points, resulting in a scattering wave to cause reflection and destructive interference.…”

Section: End Gradient Optimizationmentioning

confidence: 99%

“…In principle, the effectiveness of the filter is inversely proportional to wall spacing

and proportional to the distance ρ between the filter and the waveguide wall. However, the attenuation of the

denoted by

is determined primarily from the wall spacing

as expressed in (6) [ 33 ]. Referring to Figure 2 , the filter’s orthogonal walls are positioned in such a way that they stand in between the adjacent slots to limit the efficient propagation of undesired E V to guarantee the sidelobes’ suppression, as observed in Figure 3 a.…”

Section: Antenna Configurationmentioning

confidence: 99%

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

Anim

Diawuo

Jung

2021

Sensors

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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.

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Section: End Gradient Optimizationmentioning

confidence: 99%

“…In principle, the effectiveness of the filter is inversely proportional to wall spacing

and proportional to the distance ρ between the filter and the waveguide wall. However, the attenuation of the

denoted by

is determined primarily from the wall spacing

Section: Antenna Configurationmentioning

confidence: 99%

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

Anim

Diawuo

Jung

2021

Sensors

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show abstract

“…Based on the above results and analysis, since there is mature theory for cross-polarization suppression [1][2][3][4][5][6]9] , the key point of designing parallel metallic plates is not to affect the original amplitude distribution for co-polarization. Plate lengths around half the wavelength obviously become forbidden choices.…”

Section: Matching Theorymentioning

confidence: 99%

“…In order to meet this requirement, LSRWSAAs, with consideration for design and fabrication simplicity, generally need to achieve great cross-polarization suppression at first [2] . Several simple methods have been studied to suppress cross-polarization [1,[3][4][5][6] , such as choke slots, metallic grids, adjusting the distance between antennas and ground plane, parallel metallic plates etc. Choke slots are not preferred for large-scale arrays because of their big volume, heavy weight and narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Matching Theory of Cross-Polarization Suppression Components for Large-Scale Rectangular Waveguide Slot Array Antennas

Ma¹,

Pan²

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abstract:In order to obtain good circular polarization, parallel metallic plates are used for large-scale rectangular waveguide slot array antennas to achieve pure linear polarization at first. It is found that these plates not only suppress cross-polarization, but also influence the original amplitude distribution of arrays for co-polarization. Though it is easy to obtain the proper plates length to achieve satisfying cross-polarization suppression. Plates with a specific length drastically perturb the array distribution, which leads to severe degradation of radiation performance. A matching theory for plates design is proposed and verified. It provides proper parameters for parallel metallic plates, and criteria for judging the design results. A practical array antenna is fabricated. Both the simulation and measurement results validate this theory. The theory gives guidance of designing similar external components for cross-polarization suppression or other functions, which is useful for slot arrays and other array antennas.

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“…For the purpose of decreasing undesired cross-polarization in narrow-wall slotted waveguide array antenna, some methods have been presented. Using polarization filter is the simplest way to reduce cross-polarization [1]. A kind of polarization filter is consisted of orthogonal walls between slots.…”

Section: Introductionmentioning

confidence: 99%

Narrow-wall slotted waveguide array antenna with low cross-polarization filter

Xiong¹,

Pan

Ma³

2016

Proceedings of the 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer

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A narrow-wall slotted waveguide array antenna with low cross-polarization filter is presented. The horizontal polarization (HP) is the co-polarization for narrow-wall slotted waveguide array antenna, while the vertical polarization (VP) is the cross-polarization. High level cross-polarization reduces effect and is undesirable. Some formulas were presented to give a concise explanation how this structure reduces cross-polarization. On this basis, a 32-element low cross-polarization narrow-wall slotted waveguide array antenna in 9.305GHz was designed and simulated. The antenna has the characteristics SLL=-20dB and cross-polarization lower than-40dB.

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Performance of cross-polarization filter dedicated for slotted waveguide antenna array

Cited by 6 publications

References 3 publications

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

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

Matching Theory of Cross-Polarization Suppression Components for Large-Scale Rectangular Waveguide Slot Array Antennas

Narrow-wall slotted waveguide array antenna with low cross-polarization filter

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