Experimental results of 144-element dual-polarized endfire tapered-slot phased arrays

Holter, H.; Chio, Tan‐Huat; Schaubert, D.H.

doi:10.1109/8.900228

Cited by 125 publications

(37 citation statements)

References 6 publications

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“…Results of scan impedance studies, and the occurrence of impedance anomalies, have been reported for the conventional stripline-fed bilateral Vivaldi antennas when the array scans off-broadside [6], [8]. To the author's best knowledge, no results have been reported for arrays of bunny-ear antennas where the effect of the outer curve on the scan impedance has been analyzed.…”

Section: Length Of the Outer Curve (L Out )mentioning

confidence: 93%

“…The array design represents a challenging problem for which different technologies are being considered [5]. This paper presents the benefits, the drawbacks, and a design example of a TSA array, which will be distinct from other studies published thus far [6]- [8] namely, the antennas are differentially fed, thereby enabling us to use differential amplifiers and differential beam-forming technology in a straight-forward manner. 1A illustrates an exponentially tapered aperture fed by a microstrip line printed on a relatively expensive and potentially lossy substrate.…”

Section: Introductionmentioning

confidence: 99%

“…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. Among them, (i) the impedance resonance that appears when a surface excited wave travels along the facets of a substrate (printed TSAs), which then destructively interferes with the phasing of the array; or, (ii) the impedance resonances that appear due to gaps between disjoint antenna elements/tiles that tend to radiate, thereby severely disrupting the impedance characteristics [20]; or, (iii) the impedance resonances that occur for H-plane scanned bilateral TSAs, which arise due to a voltage difference between the bilateral fins of the TSAs, and that can be eliminated by plated-through vias in the elements [6]; or, (iv) the impedance resonance that arises in triangular grid arrays of phase-steered linear-polarized TSA arrays [21]. The presently employed bunny-ear antennas are dielectric-free, are electrically interconnected along their outer edges, and also unilateral and dual-polarized, so that the previously mentioned impedance resonances are not observed.…”

Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 99%

See 2 more Smart Citations

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: Length Of the Outer Curve (L Out )mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Scan Impedance Anomalies Associated To Differential Arrmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Its potential for wideband (multi-octave) and relatively widescan arrays makes it good candidate for high-performance phased array systems [5][6][7][8][9]. However, these TSAs usually require a microstrip-to-slot or coplanar waveguide (CPW)-to-slot transitions as part of their feeding network, which not only increases the design complexity but also imposes a limit on their intrinsically broad frequency bandwidth [11].…”

Section: Introductionmentioning

confidence: 99%

“…The low coupling between array elements is also required in phased array systems in order to avoid scan blindness and anomalies within the desired bandwidth and scan volume. Among the most widely used printed antennas in phased array systems are tapered slot antennas (TSA) [4][5][6][7][8][9] and quasi-Yagi antennas [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design of Double Dipole Antenna With Enhanced Usable Bandwidth for Wideband Phased Array Applications

Eldek¹

2006

PIER

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Abstract-In this paper, the regular microstrip-fed dipole antenna with simplified balun is modified to improve the usable bandwidth by increasing the stability of the radiation patterns. The presented antenna consists of two parallel dipoles of different lengths to obtain two main resonances. The distance between the two dipoles is adjusted to reduce the return loss between the two main resonances. A wide usable bandwidth of more than 84% is obtained with high radiation pattern stability. The proposed antenna is simple and small in size. The results of a modified two-element array configuration from this antenna show that it is very good candidate for wideband phased array applications.

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Traveling‐Wave Antennas

Milligan¹

2005

Modern Antenna Design

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Traveling-wave antennas consist of transmission-line structures that radiate. We develop a unified theory for end-fire line antennas because length and propagation constant along the structure determine most of their properties. To first order, length determines gain and bandwidth. The size and shape of the structure produce secondary effects such as polarization nulls and narrower beamwidths. Most of these structures are slow wave-transmission structures that bind waves to it and radiate at discontinuities. We use surface-wave structures to radiate end-fire beams and leaky wave structures to radiate beams at an angle to the axis of the line source. In both cases there are planar configurations that have their uses, but in this chapter we concentrate on long, thin geometries. We combine leaky wave line-source radiators, such as slotted rectangular waveguides, into planar arrays, but the line source remains the building block.We make traveling-wave antennas from structures that guide waves. Surface-wave structures bind the power to the transmission line and radiate from discontinuities such as bends or dimensional changes. In some cases we analyze the surface wave as radiating throughout its extent on the transmission line. Both methods provide insight. Leaky wave antennas carry waves internally, such as a waveguide, and radiate at openings that allow power to escape. The radiation mechanism differs in the two cases, but we use similar mathematics to describe both types. We may have trouble distinguishing the radiation mode because the structures may be similar because with small changes in structure, some antennas can radiate in either mode. We separate traveling-wave antennas from other antennas by the presence of a wave traveling along the structure, with most of its power propagating in a single direction.We divide antennas by their structure: line and planar. We usually analyze planar structures as being infinite in the direction normal to the wave propagation. Similarly, we usually ignore the diameter of line sources in a first-order analysis. The diameter is important for determining the mode structure, but to first order we calculate patterns Modern Antenna Design, Second Edition,

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Experimental results of 144-element dual-polarized endfire tapered-slot phased arrays

Cited by 125 publications

References 6 publications

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

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

Design of Double Dipole Antenna With Enhanced Usable Bandwidth for Wideband Phased Array Applications

Traveling‐Wave Antennas

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