A low-profile wide-band (5:1) dual-pol array

Lee, J.J.; Livingston, S.; Koenig, R.

doi:10.1109/lawp.2003.812243

Cited by 108 publications

(42 citation statements)

References 7 publications

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“…Then the backing structure was measured and a similar equation holds (2) where is the phase recorded by the horn antenna and is the reflection phase given by the backing structure. The error was assumed to be equal in both cases.…”

Section: Measurementsmentioning

confidence: 99%

“…Existing solutions, such as the Vivaldi antenna [2] show good performances at the cost of low cross polarization purity, which limits the range of possible applications. Other antennas, such as the connected array without a backing reflector, as described in [3], show excellent performances in terms of operating bandwidth, but an efficiency that can be as low as 50 %, because of the poor front-to-back ratio.…”

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confidence: 99%

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Frequency Selective Surfaces for Extended Bandwidth Backing Reflector Functions

Pasian

Neto

Monni

et al. 2008

2008 38th European Microwave Conference

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Pasian, M.; Monni, S.; Neto, A.; Ettorre, M.; Gerini, G. Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-This paper deals with the use of frequency selective surfaces (FSS) to increase the efficiency bandwidth product in wideband antenna arrays, whose efficiency is limited by the front-to-back ratio. If the backing reflector for the antenna is realized through a single metal plane solution, its location will be suitable only on a relatively limited frequency range especially if wide angle scanning is required. In order to extend the frequency range of usability, an FSS can be sandwiched between the antenna and the ground plane, providing an additional reflecting plane for an higher frequency band. The possibility to integrate in the antenna different functionalities, otherwise performed by several antennas, is also discussed in the paper. The proposed backing structure composed by the FSS and the ground plane has been designed to be used in conjunction with a wideband antenna consisting of an array of connected dipoles. A hardware demonstrator of the backing structure has also been manufactured and tested.

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Section: Measurementsmentioning

confidence: 99%

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confidence: 99%

Frequency Selective Surfaces for Extended Bandwidth Backing Reflector Functions

Pasian

Neto

Monni

et al. 2008

2008 38th European Microwave Conference

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“…Other well-known UWB phased array antennas such as Tem horn [5], bunny-ear [6], Vivaldi [7]feature a third dimension which plays a role in their broadband performance. However, these elements are costly and also difficult to fabricate.…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband tightly coupled fractal octagonal phased array antenna

Farhat

Adami

Zhang

et al. 2013

2013 International Conference on Electromagnetics in Advanced Applications (ICEAA)

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-This paper presents a low profile ultrawideband tightly coupled phased array antenna with integrated feedlines. The aperture array consists of planar element pairs with fractal geometry. In each element these pairs are set orthogonal to each other for dual polarisation. The design is an array of closely capacitively coupled pairs of fractal octagonal rings. The adjustment of the capacitive load at the tip end of the elements and the strong mutual coupling between the elements, enables a wideband conformal performance. Adding a ground plane below the array partly compensates for the frequency variation of the array impedance, providing further enhancement in the array bandwidth. Additional improvement is achieved by placing another layer of conductive elements at a defined distance above the radiating elements. A Genetic Algorithm was scripted in MATLAB and combined with the HFSS simulator, providing an easy optimisation tool across the operational bandwidth for the array unit cell design parameters. The proposed antenna shows a wide-scanning ability with a low cross-polarisation level over a wide bandwidth.

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“…Practically, the operating bandwidth is limited by the transition from the feeding transmission line to the slot line of the antenna, and by the finite dimensions of the antenna [14]. Generally, the tapered slot is greater than one-half wavelength at the low end of the band, and more than two wavelengths at the high end for a 3 : 1 bandwidth [15].…”

Section: Introductionmentioning

confidence: 99%

A Novel Wideband Antenna Array With Tightly Coupled Octagonal Ring Elements

Chen¹,

Yang²,

Nie³

2012

PIER

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Abstract-A novel phased array antenna with wide bandwidth and wide scan angle is presented. The radiating aperture of the phased array consists of periodically and closely spaced octagonal ring elements. Tight capacitive coupling between adjacent elements is realized by interdigitating the end portions of the ring elements. To improve the impedance matching of the individual antenna elements over wide frequency band, a novel impedance matching layer consists of periodic octagonal ring element is subtly designed and placed over the radiating aperture. Both of the radiating elements and impedance matching layer are printed on a flexible membrane substrate with a thickness of 0.04 mm. Measured results of a 16-element linear array demonstrate that good impedance matching over a 4.4 : 1 bandwidth can be obtained for beam scan angles within ±45 • from broadside. As compared to conventional wideband phased array such as tapered slot antenna array, the proposed phased array has the features such as low cost, low profile, light weight, and ease of fabrication.

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A low-profile wide-band (5:1) dual-pol array

Cited by 108 publications

References 7 publications

Frequency Selective Surfaces for Extended Bandwidth Backing Reflector Functions

Frequency Selective Surfaces for Extended Bandwidth Backing Reflector Functions

Ultra-wideband tightly coupled fractal octagonal phased array antenna

A Novel Wideband Antenna Array With Tightly Coupled Octagonal Ring Elements

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