Optimization of the Feed Impedance for an Arbitrary Crossed-Feed-ARM Impulse Radiating Antenna

Tyo, J. Scott

doi:10.1007/0-306-47948-6_42

Cited by 6 publications

(11 citation statements)

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“…In this paper we consider only WAs with a nominal 200 2 impedance at the input to the feed arms. For this case, the results of [1] give an optimum angle of about from vertical. At this angle the feed arms are very wide, making it difficult to maintain a flat TDR at the end of the feed arms.…”

Section: Introductionmentioning

confidence: 87%

“…Scott Tyo [1]. The objective of this optimization is to increase the antenna gain by adjusting the placement of the feed arms.…”

Section: Introductionmentioning

confidence: 99%

“…Tyo's results indicate that the prompt aperture efficiency (proportional to power -not voltage) can be increased from -25% for the case to -35% for the optimum configuration. The results in [1] can be used to optimize a 4-arm IRA with an arbitrarily specified input impedance. In this paper we consider only WAs with a nominal 200 2 impedance at the input to the feed arms.…”

Section: Introductionmentioning

confidence: 99%

“…In [1], Tyo described the optimization of the feed arm geometry for WAs with four coplanar plate feed arms. The standard IRA configuration is symmetric, with the feed arms perpendicular to each other or, in other words, at from the vertical.…”

Section: Introductionmentioning

confidence: 99%

“…The time domain results are converted to the frequency domain using the procedure given in [3] .In [1], the aperture height divided by the aperture radius (hja) is used as the optimization parameter. Therefore, we will also use this parameter for comparisons in this report.…”

Section: Introductionmentioning

confidence: 99%

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Impulse radiating antennas for mine detection

Farr

Bowen

2001

SPIE Proceedings

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We consider here a selection of Impulse Radiating Antennas (ERAs) that may find use in mine detection. Such devices generally consist of a paraboloidal reflector and a broadband feed. This configuration generally allows the radiation of a clean impulse with approximately two decades of bandwidth, when driven by a step-function source. In certain systems, Impulse Radiating Antennas may prove to be preferable to other antennas that might be used in mine detection. IRAs radiate a focused plane-wave onto the target, in both the near and far fields. Because the radiation pattern is focused, clutter in the received signal may be reduced. In addition, a focused beam may allow a better look-ahead capability. Two designs in particular will be explored, with either a solid reflector and a collapsible reflector fabricated from a conducting mesh. We provide extensive data on both designs with respect to gain, impulse response, beamwidth, and crosspol performance. We also provide detailed comparisons of IRAs, with two different feed arm locations, and to the dominant polarization. For IRAs with either collapsible reflectors or solid reflectors, we demonstrate improved performance when the feed arms are positioned at to the dominant polarization. In both cases, optimization of the feed arm geometry improved both the gain and the crosspol rejection of the antennas. A mild side effect was a slight increase in TDR reflections at the end of the feed arms.

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Section: Introductionmentioning

confidence: 87%

“…Scott Tyo [1]. The objective of this optimization is to increase the antenna gain by adjusting the placement of the feed arms.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%