A class of E-plane scan blindnesses in single-polarized arrays of tapered-slot antennas with a ground plane

Schaubert, D.H.

doi:10.1109/8.504301

Cited by 50 publications

(21 citation statements)

References 13 publications

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“…In [19], similar anomalies appear in the middle of the band for E-plane scanned single-polarized arrays of bilateral TSAs, which are due to the presence of parallel plate modes in between the parallel strokes of TSA plates. This type of resonance was also found to occur for an E-plane scanned single-polarized array of bunny-ears (results omitted).…”

Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 90%

“…The presently proposed bunny-ear element exhibits a few Eplane scan impedance anomalies that are typically found for other Vivaldi elements as well [18], [19]. Apart from these types of resonances, a number of additional impedance anomalies exist that have been identified before and that are attributed to a particular realization of the TSA elements.…”

Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 98%

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Study and Design of a Differentially-Fed Tapered Slot Antenna Array

Acedo

García

González-Posadas

et al. 2010

IEEE Trans. Antennas Propagat.

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Abstract-The results of a parametric study and design of an ultra-wideband dual-polarized array of differentially fed Tapered Slot Antenna elements are presented. We examine arrays of bunny-ear antennas and discuss the capabilities and limitations of differential antenna technology. As we focus on radio astronomical applications, the absence of a balancing-feed circuit not only reduces the first-stage noise contribution associated to losses in the feed, but also leads to a cost reduction. Commonmodes are supported by the antenna structure when a third conductor is present, such as a ground plane. We demonstrate that anomalies may occur in the differential-mode scan impedance. Knowledge of both types of scan impedances, differential and common mode, is required to properly design differential LNAs and to achieve optimal receiver sensitivity. A compromise solution is proposed based on the partial suppression of the undesired common-mode currents through a (low loss) balancing-dissipation technique. A fully steerable design up to 45º in both principal planes is achieved.

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Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 90%

Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 98%

Study and Design of a Differentially-Fed Tapered Slot Antenna Array

Acedo

García

González-Posadas

et al. 2010

IEEE Trans. Antennas Propagat.

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“…The blindness mechanism was carefully explained first for infinite arrays of printed antennas [3], [4], [14], and then research on this topic was extended to finite phased arrays of printed antennas [5], [6]. Later, this phenomenon was discussed for different array configurations such as infinite array of monopoles in a grounded dielectric slab [15], infinite arrays of printed dipoles on dielectric sheets perpendicular to a ground plane [16], infinite stripline-fed tapered slot antenna arrays with a ground plane [12], [17]. Furthermore, various methods to improve the scan range such as subarraying [13], substrate modification [18], loading the array elements with varactor diodes [19] or using shorting posts [20] were reported.…”

Section: Introductionmentioning

confidence: 99%

Scan Blindness Phenomenon in Conformal Finite Phased Arrays of Printed Dipoles

Ertürk

Bakir

Rojas

et al. 2006

IEEE Trans. Antennas Propagat.

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Abstract-Scan blindness phenomenon for finite phased arrays of printed dipoles on material coated, electrically large circular cylinders is investigated. Effects on the scan blindness mechanism of several array and supporting structure parameters, including curvature effects, are observed and discussed. A full-wave solution, based on a hybrid method of moments/Green's function technique in the spatial domain, is used to achieve the aforementioned goals. Numerical results show that the curvature affects the surface waves and hence the mutual coupling between array elements. As a result, the array current distribution of arrays mounted on coated cylinders are considerably different compared to similar arrays on planar platforms. Therefore, finite phased arrays of printed dipoles on coated cylinders show different behavior in terms of scan blindness phenomenon compared to their planar counterparts. Furthermore, this phenomenon is completely different for axially and circumferentially oriented printed dipoles on coated cylinders suggesting that particular element types might be important for cylindrical arrays.

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“…However, due to the strong mutual coupling between antenna elements, performances of elements in array environment differ greatly from those of isolated Vivaldi antennas. Furthermore, the general continuous metal plate structure in Vivaldi antenna arrays may induce higher order modes along the E-plane [19]. To suppress these modes, thick elements are usually accepted to reduce the gap and shift the cutoff frequency out of the band.…”

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 class of E-plane scan blindnesses in single-polarized arrays of tapered-slot antennas with a ground plane

Cited by 50 publications

References 13 publications

Study and Design of a Differentially-Fed Tapered Slot Antenna Array

Study and Design of a Differentially-Fed Tapered Slot Antenna Array

Scan Blindness Phenomenon in Conformal Finite Phased Arrays of Printed Dipoles

A Novel Wideband Antenna Array With Tightly Coupled Octagonal Ring Elements

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