Square Ring Element Reflectarrays With Improved Radiation Characteristics by Reducing Reflection Phase Sensitivity

Yoon, Ji Hwan; Yoon, Young Joong; Lee, Woosang; So, Joonho

doi:10.1109/tap.2014.2379919

Cited by 28 publications

(30 citation statements)

References 5 publications

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“…A reflection phase range of 371° has been achieved, with the reflection amplitude kept less than −0.5 dB. Linear and slow‐changing gradient in the S ‐curve is achieved for the entire W r range, with an average phase sensitivity of 64.6°/mm, which can be difficult to be met by the conventional ring and patch reflectarray elements, which usually have phase sensitivities of larger than 90°/mm . Combining multiple resonators in a single‐layered structure is able to increase the phase range, but with the price of increasing the phase sensitivity.…”

Section: Unit Elementmentioning

confidence: 99%

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Vivaldi tapered slot reflectarray loaded with dumbbell‐shaped ring resonator

Phua

Lim

Chung

2018

Micro & Optical Tech Letters

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Section: Unit Elementmentioning

confidence: 99%

“…For all cases, the S ‐curves are quite linear and the phase ranges are >360°. Because of the use of the travelling‐wave radiator, the proposed reflectarray element is able to achieve full phase range and low phase sensitivity simultaneously, which are difficult to be obtained by the conventional methods …”

Section: Unit Elementmentioning

confidence: 99%

Vivaldi tapered slot reflectarray loaded with dumbbell‐shaped ring resonator

Phua

Lim

Chung

2018

Micro & Optical Tech Letters

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“…Reflection phase characteristics of the three element types [12] . [15] , 이 경우 전기적으로 얇은 유전체 기판을 사용해야 함에 따른 대역폭의 희생 이 따르지만, 낮은 제작비용으로 파라볼릭 안테나에 근접 하는 높은 개구효율을 얻는 것이 가능하다. 그림 12.…”

Section: -3 반사소자의 특성에 따른 리플렉트어레이 성능unclassified

Researches on Microstrip Reflectarray Antennas

Yoon¹

2015

The Journal of Korean Institute of Electromagnetic Engineering

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Microstrip reflectarray is an antenna which controls its radiation pattern with a number of reflective elements. Conventionally, the reflectarray has been researched to replace curved reflector antennas. In this paper, design theories of reflectarray is briefly introduced, and research trends of high gain and broadband reflectarrays are reviewed. To improve the gain of the reflectarrays, it is required that the reflection phase errors on the reflectarray surface be minimized. For this purpose, sufficiently wide reflection phase range and low phase sensitivity should be realized with the designed element. For bandwidth improvement, the reflection phase of the element should be linear with the frequency variation. In this paper, various researches to improve the reflection phase characteristics of the element for high gain and broadband reflectarrays, such as multi-layer and single-layer multi-resonant structures, are reviewed. Also, dual-reflectarray configuration for compact antenna design is reviewed. Finally, various applications of reflectarrays such as contoured beam, near-field focusing, and RCS reduction are reviewed.

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“…However the introduction of stacked configuration with printed elements poses fabrication challenges and requires accurate alignment of the layers. Narrow bandwidth behavior have also been addressed by the introduction of single layer dual resonance elements such as parallel dipoles, spit rings and combination of different slot configurations [7][8][9][10][11][12]. However dual resonance elements with resonances in different bands require complex phasing techniques along with dual feeding mechanism that increase the complexity of the array design.…”

Section: Introductionmentioning

confidence: 99%

A wideband reflectarray antenna based on organic substrate materials

et al. 2019

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Significant improvements in terms of bandwidth of reflectarray antennas have been achieved by introduction of innovative paper substrate dielectric materials. Three differently custom composed organic dielectric substrates have been characterized for dielectric properties using a broadband technique based on open ended coax cable method. The substrates show low dielectric permittivities of 1.81, 1.63 and 1.84 along with a loss tangent of 0.053, 0.047 and 0.057. Validation of using the proposed substrates for reflectarray antenna was done by modelling and fabricating reflectarray unit elements on the three substrates. Scattering parameter analysis of unit reflectarray elements show encouraging results with a broadband frequency response of 340 MHz at a phase gradient of 0.14º/MHz. Thus the proposed substrate could serve exceptionally to address the narrow bandwidth problem in reflectarray antennas.

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Square Ring Element Reflectarrays With Improved Radiation Characteristics by Reducing Reflection Phase Sensitivity

Cited by 28 publications

References 5 publications

Vivaldi tapered slot reflectarray loaded with dumbbell‐shaped ring resonator

Vivaldi tapered slot reflectarray loaded with dumbbell‐shaped ring resonator

Researches on Microstrip Reflectarray Antennas

A wideband reflectarray antenna based on organic substrate materials

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