Dielectric Rod Antennas as Optimized Feed Elements for Focal Plane Arrays

Richter, J.; Schmidt, Lorenz-Peter

doi:10.1109/aps.2005.1552342

Cited by 27 publications

(17 citation statements)

References 6 publications

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“…8. There is considerable confidence in this package as it is known to produce results comparable with experiment for similar problems [1]. The HE11 mode power and launching efficiency was then calculated using an overlap integral between the modes' theoretical field on the rod and the simulated field as described by Ando et al [3].…”

Section: Source Realizationmentioning

confidence: 99%

“…Recently, there have been quite a few publications that have employed the multiple signal classification (MUSIC) algorithm in various two-dimensional and three-dimensional inverse problems for locating the positions of small scatterers [1]- [7]. References [1]- [4] discuss the basic formulation of MUSIC for the scalar fields, as in the problems of acoustics. References [5]- [7], along with others, have recently extended them to the electromagnetic vector fields.…”

Section: Music Algorithm For Two-dimensional Inverse Problems With Spmentioning

confidence: 99%

“…Dielectric rod antennas belong to the class of traveling-wave dielectric antennas and have been shown to perform well in an array [1] and have been fabricated for terahertz frequencies [2].…”

Section: Introductionmentioning

confidence: 99%

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High Efficiency Excitation of Dielectric Rods Using a Magnetic Ring Current

Hanham

Bird

2008

IEEE Trans. Antennas Propagat.

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We describe a theoretical analysis of the excitation of the fundamental HE surface wave mode on an infinite dielectric rod by a magnetic ring current that is interior to the rod. Earlier work has provided results for an external ring source. Results obtained by us show that for an interior source excitation efficiencies close to 100% are possible for high permittivity dielectrics and launching efficiencies greater than 90% can be achieved over bandwidths greater than 20%. This is a higher efficiency than is possible with an exterior source. Simulation results verifying the theoretical analysis are presented for the practical case of a coaxial waveguide exciting the dielectric rod.Index Terms-Dielectric rod, excitation efficiency, magnetic ring current.

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Section: Source Realizationmentioning

confidence: 99%

Section: Music Algorithm For Two-dimensional Inverse Problems With Spmentioning

confidence: 99%

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High Efficiency Excitation of Dielectric Rods Using a Magnetic Ring Current

Hanham

Bird

2008

IEEE Trans. Antennas Propagat.

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“…that provide a good matching of the DRW with a metal waveguide have been successfully employed as antennas [5]. In [6], the dielectric rod antennas of rectangular cross section have been used as optimized feed elements for focal plane arrays. The objective of this work is to improve the performance of the primary sources by Manuscript inserting dielectric rods in the waveguides.…”

Section: Introductionmentioning

confidence: 99%

Study of Folded Reflector Multibeam Antenna With Dielectric Rods as Primary Source

Nguyen

Pichot

Migliaccio

et al. 2009

Antennas Wirel. Propag. Lett.

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Based on a folded reflectarray antenna, a three-beam antenna is investigated using dielectric rods as primary feed placed in open-ended waveguides for obtaining an optimal illumination on the reflector. The performances for a dielectric rod and a combination of three rods are investigated using Ansoft HFSS software. In a first step, dielectric rods have been manufactured and measured at 77 GHz. In a second step, they are used as primary feed of the reflectarray. The corresponding shift of the phase center caused by the rods has been estimated in simulation and accounted for in the antenna arrangement. The radiation pattern measurements show a gain improvement of 2 dB.

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“…In order to get a high resolution millimeter wave image, various types of detectors have been tried for the feed element in the focal plane array (FPA) based quasi optical imaging systems at W-band [8][9][10][11][12][13][14]. The spatial resolution of a focal plane array system very much depends on the spacing of its feed elements in the detector array.…”

Section: Introductionmentioning

confidence: 99%

Optical Performance Analysis Using a Point Spread Function and Modulation Transfer Function for W-Band PMMW Imaging System Based on Quasi Optics Focused Array of Dielectric Rod Waveguide Antenna

Singh

Kim²,

Tiwary³

et al. 2010

PIER B

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Abstract-The appropriateness of dielectric loaded antenna for the passive millimeter wave imaging application has recently been demonstrated. In this paper, we analyze the optical performance of the passive millimeter wave (PMMW) imaging system based on a 1D focal plane array (FPA) of dielectric rod waveguide (DRW) antennas. A first step in the design process is to analyze the image quality potential of 1D FPA-based imaging system in terms of the point spread function (PSF) and the modulation transfer function (MTF). We consider the effect of lens, DRW antenna, electromagnetic crosstalk between adjacent DRW antenna elements in the array, and sampling. From simulation and measurement, we found that the image quality in the passive millimeter wave imaging system with a DRW antenna array is less sensitive to electromagnetic crosstalk between antenna elements in the array. The measurements and simulations show that the system is diffraction limited and also closely agrees with the Rayleigh criterion of resolution for diffraction limited optical systems.

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Dielectric Rod Antennas as Optimized Feed Elements for Focal Plane Arrays

Cited by 27 publications

References 6 publications

High Efficiency Excitation of Dielectric Rods Using a Magnetic Ring Current

High Efficiency Excitation of Dielectric Rods Using a Magnetic Ring Current

Study of Folded Reflector Multibeam Antenna With Dielectric Rods as Primary Source

Optical Performance Analysis Using a Point Spread Function and Modulation Transfer Function for W-Band PMMW Imaging System Based on Quasi Optics Focused Array of Dielectric Rod Waveguide Antenna

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