Nonlinear photoconductivity characteristics of antenna activated by 80-picosecond optical pulses

Liu, D.W.; Carr, P.H.; Thaxter, J. B.

doi:10.1109/68.502104

Cited by 7 publications

(10 citation statements)

References 14 publications

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“…Motivation for the source structure in (2) is also provided by the possibility of building 3-D pulsed antenna arrays composed of identical electrically small photoconducting elements [2]- [4]. These antennas, made of III-V compound semiconductor wafers, radiate microwave pulses when triggered by short duration (e.g., picosecond) optical pulses.…”

Section: Introductionmentioning

confidence: 99%

“…I N a previous paper [1] we investigated the radiation properties of scalar wave fields radiated by threedimensional (3-D) sources to the scalar wave equation (1) paying special attention to sources having the spacetime separable form of a "traveling wave" (2) where, without loss of generality, the main beam direction was chosen to be the positive axis and the space distribution was normalized so that (3) In order to compare the radiation performance for different source parameters we have considered the source's volume as invariant.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, since the ellipsoidal shape may be continuously changed from a prolate to an oblate spheroidal shape, the closed-form results explain the different radiation characteristics of both elongated, quasi-linear traveling wave source distributions and quasi-planar broadside pulsed distributions, as well as those of 3-D sources with comparable longitudinal and transverse dimensions. Finally, while the analysis in [1] has concentrated on impulsive sources [i.e., in (2)], which generate near the beam axis singular field terms that cannot be parameterized, the emphasis here is placed on finite pulses (specifically on square pulses).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis and characterization of ultrawide-band scalar volume sources and the fields they radiate. II. Square pulse excitation

Marengo

Devaney

Heyman

1998

IEEE Trans. Antennas Propagat.

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In a previous paper [1], we studied transient radiation from scalar collimated volume source distributions subjected to impulsive excitation. In this paper, we extend our analysis and results to the case of nonimpulsive excitation, paying special attention to the parameterization of the radiation pattern of three-dimensional (3-D) ellipsoid source distributions driven by square pulses of finite duration. We study the role both of the source's space distribution and of the square pulse duration on the generation of well-collimated short-pulse fields. In particular, we explore the source's angular and range resolutions as functions of the transverse and longitudinal dimensions of the source (for a fixed source volume) and of the pulse duration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and characterization of ultrawide-band scalar volume sources and the fields they radiate. II. Square pulse excitation

Marengo

Devaney

Heyman

1998

IEEE Trans. Antennas Propagat.

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show abstract

“…The carrier velocity is not linear with the bias electric field, and some threshold value exists above which a saturation plateau is observed. 7 This relationship is shown in Fig. 2.…”

Section: Authorsmentioning

confidence: 99%

“…The nonlinear characteristics of the radiated field versus the bias field generated by a gigahertz photoconducting antenna have been reported elsewhere. 7 The amplitude of such fields, E͑t͒, is proportional to their final velocity ͑v͒:…”

Section: Authorsmentioning

confidence: 99%