Impulse Radiating Antennas

Baum, Carl E.; Farr, Everett G.

doi:10.1007/978-1-4615-2870-8_17

Cited by 107 publications

(58 citation statements)

References 2 publications

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“…The field distribution can be computed analytically by superposing the fields given by (9) for the two sets of feed arms taken one at a time [2,3]. The feed impedance and aperture heights of the 4-arm IRA are [7] ·…”

Section: !Ia Validation Of Modeling Methodsmentioning

confidence: 99%

“…1). Because of the symmetry of the system, the field distribution, feed impedance, and aperture height of this type of antenna can be calculated analytically [2]. While there is no additional complexity associated with making a more general IRA with feed arms that are not oriented at right angles, the only analysis of crossed coplanar fed IRAs whose arms make an arbitrary angle <Po with respect to the ground plane as shown in fig.…”

Section: Ic Reflector Iras With Crossed Coplanar Feedsmentioning

confidence: 99%

“…When excited by a fast-rising step, the radiated field closely resembles a narrow impulse. While the nature of the focusing optic and the feed structure do affect the features of the radiated waveform before and after the prompt impulse, the fast part of the radiated signal for a general IRA is [2,3,4] -ft E(x,y}ru:dy dV (t) E,aAr,t)-,…”

Section: Introductionmentioning

confidence: 99%

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

Tyo

Ultra-Wideband, Short-Pulse Electromagnetics 5

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This note considers the optimization of feed arm geometry of 4-arm, coplanar plate IRAs when the angular position and extent of the arms are taken as free parameters. Previously, optimization of this class of antenna considered only the symmetric case where the two pairs of crossed feed arms were perpendicular to each other. Comparison is made using the prompt aperture efficiency, and the results indicate that the efficiency of 4-arm IRAs can be increased from -25% for the perpendicularly crossed arms to -35% for the optimum configuration. In addition to the optimization, the feed impedance of coplanar feeds is presented for general values of feed arm angle and plate width, and the optimum feed impedance is computed for each feed arm angle. The results in this note can be used to design the optimal 4-arm IRA with an arbitrary specified input impedance. · I

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Section: !Ia Validation Of Modeling Methodsmentioning

confidence: 99%

Section: Ic Reflector Iras With Crossed Coplanar Feedsmentioning

confidence: 99%

See 1 more Smart Citation

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

Tyo

Ultra-Wideband, Short-Pulse Electromagnetics 5

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“…The radiation source, positioned at the focal point of the reflector (or offset in certain cases) must be adjusted so as not to upset the radiation patterns of the transmission as a whole. ) is a derivative of the IRA model (Baum & Farr, 1993), developed by C. Baum. It operates in the 250MHz-12GHz range and presents a relatively constant gain of round 20dB as from 2GHz.…”

Section: Reflector Antennasmentioning

confidence: 99%

Ultra Wideband Antennas for High Pulsed Power Applications

Cadilhon¹,

Cassany²,

Modin³

et al. 2011

Ultra Wideband Communications: Novel Trends - Antennas and Propagation

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“…It has been suggested that it would be desirable to be able to apply fast, high-electric-field pulses without direct contact for this biological application, i.e., to radiate them from some kind of antenna. Given experience with impulse radiating antennas (IRAs) [Baum et al, 1999; C. E. Baum, E. G. Farr, and D. V. Giri, John Kraus Antenna Award of the IEEE Antennas and Propagation Society, 2006], it seemed logical to see if this could be modified in some way to focus a pulse in the near field instead of at 1.…”

Section: Introductionmentioning

confidence: 99%