Design and Validation of Gathered Elements for Steerable-Beam Reflectarrays Based on Patches Aperture-Coupled to Delay Lines

Carrasco, Eduardo; Barba, M.; Encinar, José A.

doi:10.1109/tap.2011.2122222

Cited by 15 publications

(15 citation statements)

References 13 publications

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“…However, passive microstrip reflectarrays have the significant disadvantage of lacking the beam-steering capability. In recent literature, many ideas have been proposed to overcome this shortcoming by designing a reconfigurable reflectarray [2]- [5]. The reconfigurable design aims at combining the advantages of the fixed-beam reflectarray concerning the compact size, light weight, and low cost, with the advantages of electronic scanning in regard to increased speed compared to the mechanical steering of parabolic reflectors.…”

Section: Introductionmentioning

confidence: 99%

Electronically Controlled Phasing Element for Single-Layer Reconfigurable Reflectarray

Abbosh

2012

Antennas Wirel. Propag. Lett.

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An electronically controlled phasing element for a beam-steered single-layer microstrip reflectarray operating at 4 GHz is presented. The phasing element is formed by a printed circular ring equipped with a variable-length arc stub. The reconfigurable design is accomplished by including an open gate p-i-n transistor in the variable-length stub to offer a 1-bit beam-steering ability. Full-wave electromagnetic simulations and measurements are performed to prove the linear phase performance of the proposed cell including the effect of the utilized active chip and its biasing circuit. Those results indicate the high isolation between the phase performance of the utilized cell between the ON and OFF states of the p-i-n switches.Index Terms-Microstrip antenna, phase shifter, reconfigurable antenna, reflectarray.

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Section: Introductionmentioning

confidence: 99%

Electronically Controlled Phasing Element for Single-Layer Reconfigurable Reflectarray

Abbosh

2012

Antennas Wirel. Propag. Lett.

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“…The reflectarray element consists in two aperture-coupled patches which have been grouped in pairs sharing a common delay line [2]. With the aim of controlling the reflected field the electrical length of the microstrip delay line can be varied if some switches are introduced between different segments of the line.…”

Section: A Gathered Elements Using Aperture-coupled Patchesmentioning

confidence: 99%

Sectored-beam reflectarray antenna with pattern reconfiguration by using RF-MEMS switches

Carrasco

Barba

Encinar

et al. 2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

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A reflectarray antenna with pattern reconfiguration which can be used in base stations for point-to multipoint applications is presented at 10.40 GHz. By the introduction of control elements based on RF-MEMS, the radiation pattern can be switched between three 30-degree sectors or a 60-degrees sector in the azimuth plane, with a squared cosecant shape in the elevation plane. The antenna consists of 364 aperture-coupled elements which have been gathered by pairs with the aim of reducing the number of electronic control devices and their associated feeding lines.

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“…To overcome these challenges, positive-intrinsic-negative (PIN) diodes are used as a trade-off in terms of cost and design complexity as illustrated in [14][15][16][17][18][19]. Reflectarrays formed by the gathered PIN diodes method are presented in [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Reflectarrays formed by the gathered PIN diodes method are presented in [14,15]. The gathered elements method significantly reduces the number of PIN diodes required for phasing the reconfigurable reflectarray.…”

Section: Introductionmentioning

confidence: 99%

“…The associated biasing circuit is also simplified when this biasing method is used to configure large-dimension reflectarrays. However, the prototypes presented in [14,15] use multi-layer aperture coupled structures. These multilayer phasing structures need to be manufactured carefully to achieve perfect alignment between different radiating layers.…”

Section: Introductionmentioning

confidence: 99%

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Reconfigurable reflectarray antenna using single‐layer radiator controlled by PIN diodes

Li¹,

Abbosh

2015

IET Microwaves, Antennas & Propagation

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A new type of pattern-reconfigurable reflectarray phased by reconfigurable unit cells that are centrally controlled by a laptop is presented. The proposed reflectarray with single-layer radiators employs a phasing element formed by a fixed-size circular ring attached by a variable-length arc phase delay line controlled by positive-intrinsic-negative diodes. The biasing network of the diodes is properly designed to minimise the interference between the radiating structure and the biasing circuit. To that end, the biasing circuit is placed on a substrate layer below the ground plane whereas the PIN switching diodes are embedded within radiators. The biasing signal is transmitted to the switching elements at the top layer using vias that penetrate the thin substrate layer, the foam layer and the ground plane. Investigations are carried out to verify the performances of the phasing element using a waveguide simulator. A reflectarray, which includes a C-band offset fed 8 × 8 elements, is configured to switch its main beam between 20°and 30°from the broadside direction. A biasing control unit is added to the fabricated reflectarray and activated using a laptop. The measured radiation patterns of the proposed reflectarray demonstrate a beam-switching characteristic from the broadside direction, which confirm the proposed design method.

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Design and Validation of Gathered Elements for Steerable-Beam Reflectarrays Based on Patches Aperture-Coupled to Delay Lines

Cited by 15 publications

References 13 publications

Electronically Controlled Phasing Element for Single-Layer Reconfigurable Reflectarray

Electronically Controlled Phasing Element for Single-Layer Reconfigurable Reflectarray

Sectored-beam reflectarray antenna with pattern reconfiguration by using RF-MEMS switches

Reconfigurable reflectarray antenna using single‐layer radiator controlled by PIN diodes

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