Superstrate-Enhanced Ultrawideband Tightly Coupled Array With Resistive FSS

Moulder, Willam F.; Sertel, Kubilay; Volakis, John L.

doi:10.1109/tap.2012.2210292

Cited by 159 publications

(80 citation statements)

References 13 publications

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“…These include differential feeds [7], printed baluns [8], tightly coupled dipole arrays with integrated baluns (TCDA-IB) [9], and Planar Ultrawideband Modular Array (PUMA) feeds [10]. The differential feeding method in conjunction with a resistive frequency selective surface (FSS) achieved the highest bandwidth (21:1) but employs lossy (2-7 dB) and bulky external 180° hybrids.…”

Section: Introductionmentioning

confidence: 99%

An extremely wideband tapered balun for application in tightly coupled arrays

Bah

Qin

Guo

2016

2016 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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− This paper presents the design of a single layer, compact, tapered balun with a >20:1 bandwidth and less than / in length at the lowest frequency of operation. The balun operates from 0.7GHz to over 15GHz. It can provide both impedance transformation as well as a balanced feed for tightly coupled arrays. Its performance is compared with that of a full-length balun operating over the same frequency band. There is a high degree of agreement between the two baluns.

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Section: Introductionmentioning

confidence: 99%

An extremely wideband tapered balun for application in tightly coupled arrays

Bah

Qin

Guo

2016

2016 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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“…These arrays provide wide bandwidth and low profile by employing elements that are capacitively coupled to their neighbors [1], [2]. To increase the functionality of TCAs for systems demanding extreme bandwidth (> 10 : 1), the authors introduced a superstrate-enhanced TCA with resistive substrate loading [3]. This design (herein called the SuperstrateEnhanced Substrate Loaded Array or SESLA) uses the loading to drastically increase the bandwidth of a TCA (by a factor of two or more).…”

Section: Introductionmentioning

confidence: 99%

“…To avoid catastrophic losses due to the loading, a synergistically designed superstrate is employed. The SESLA design presented in [3] operates over a 21 : 1 bandwidth (infinite array, V SW R < 3) and maintains a radiation efficiency greater than 73%. However, one challenge in its implementation is the required balanced feeding.…”

Section: Introductionmentioning

confidence: 99%

“…As seen, it employs a resistive loading between the elements and ground plane for increased bandwidth. Also, it employs a synergistically-designed superstrate to minimize losses due to the resistive substrate loading, as described in [3]. The unit cell has two co-phased radiators, with the radiator's E−plane dimension being half its H−plane dimension.…”

Section: Introductionmentioning

confidence: 99%

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Feeding of a wideband Superstrate-Enhanced Substrate Loaded Array

Moulder

Sertel

Volakis

2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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In a recent paper, the authors presented a Superstrate-Enhanced Substrate-Loaded Array (SESLA) for scanning array systems demanding extreme (> 10 : 1) bandwidth. For proper operation, the SESLA requires balanced feeding, a significant challenge given its large bandwidth. In this paper a version of the SESLA with an integrated feed is presented. The design uses a stripline-based Marchand balun, allowing interface with a 50Ω unbalanced line. The optimized version of the array is demonstrated to operate across a 13.9 : 1 bandwidth under broadside scan (V SW R < 2.4) and across a 13.3 : 1 bandwidth (V SW R < 3) when scanned to 45 0 in the E− and H−planes.

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“…Recently, an UWB tightly coupled dipole array (TCDA) was developed with a compact wideband balun as part of the aperture [1], [2]. The novelty of the proposed array is the elimination of external baluns for impedance matching.…”

Section: Introductionmentioning

confidence: 99%

Ultra-wideband on-site coding receiver (OSCR) for digital beamforming applications

Alwan¹,

Khalil²,

Volakis³

2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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We present a novel low-cost reduced-hardware power efficient digital beamforming architecture suitable for wideband and large arrays. Particular to this realization is the introduction of an on-site code division multiplexing (CDM) technique at the analog front-end to significantly reduce the number of analog-to-digital converters (ADC). Concurrently, the number of parallel input/output (I/O) channels at the digital back-end are substantially reduced as well. This implies a corresponding reduction in the number of field-programmable gate arrays (FPGAs) for baseband processing as compared to conventional beamforming techniques. The impact of on-site coding on the overall signal-to-noise ratio (SNR) was evaluated and demonstrated that noise due to inter-channel interference (ICI) can be suppressed using brick-wall filters, high resolution ADC and orthogonal codes.

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Superstrate-Enhanced Ultrawideband Tightly Coupled Array With Resistive FSS

Cited by 159 publications

References 13 publications

An extremely wideband tapered balun for application in tightly coupled arrays

An extremely wideband tapered balun for application in tightly coupled arrays

Feeding of a wideband Superstrate-Enhanced Substrate Loaded Array

Ultra-wideband on-site coding receiver (OSCR) for digital beamforming applications

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