Terahertz Antenna Technology and Verification: Herschel and Planck - A Review

Rolo, L.; Paquay, M.; Daddato, Robert; Parian, Jafar Amiri; Doyle, Dominic; Maagt, P. de

doi:10.1109/tmtt.2010.2050179

Cited by 19 publications

(8 citation statements)

References 12 publications

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“…Here, it should be noted that the output beam parameters (r 2 , w 2 ) are the functions of the input beam parameters (r 1 , w 1 ), wavelength (λ), and the distance traveled by the Gaussian beam. If the beam's input phase front radius of curvature and focal length of a lens are known, the output phase front radius of curvature can be computed [5] from following equation 1…”

Section: Equivalent Lens Geometry Of the Beam Waveguide Antennamentioning

confidence: 99%

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6-Meter Beam Waveguide Antenna for Ground Based Terahertz Telescope

Singh¹,

Tyagi²,

Mevada³

et al. 2021

PIER Letters

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This paper discusses the design of a 6-m Cassegrain optics based multiband reflector antenna integrated with beam waveguide (BWG) optics, which consists of an ellipsoidal mirror and three plane mirrors. The presented antenna has been simulated, and 75.8% and 76.8% aperture efficiencies have been achieved at 0.225 THz and 0.338 THz, respectively. The initial design parameters of elements of BWG network are computed using fundamental Gaussian beam parameters. The simulated results of the antenna including aperture efficiency have been presented and discussed in detail. The antenna has been designed for the ground based THz telescope for radio astronomy.

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Section: Equivalent Lens Geometry Of the Beam Waveguide Antennamentioning

confidence: 99%

“…Radio astronomy is an evolving field of research and performed using ground based and space based terahertz (THz) telescope [1][2][3][4][5]. At millimeter and submillimeter (mm and sub-mm) frequencies it can be used in radiometric information content analysis for planet atmospheric constituents [16].…”

Section: Introductionmentioning

confidence: 99%

6-Meter Beam Waveguide Antenna for Ground Based Terahertz Telescope

Singh¹,

Tyagi²,

Mevada³

et al. 2021

PIER Letters

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“…With the wide application and development of millimeter-wave and terahertz technology in the field of antennas [1][2][3][4], the demand for accurate measurement of antenna radiation characteristics is becoming increasingly strong. The technique of compact antenna test range (CATR), which transforms the spherical wavefront to a plane wave aperture distribution, is a very promising solution for millimeter-wave and terahertz antenna measurement [5][6][7][8][9][10][11][12] due to its relatively stable electromagnetic environment and fullweather capability.…”

Section: Introductionmentioning

confidence: 99%

Design of Low Cross-Polarization Tri-Reflector CATR with Standard Quadric Surfaces Working in Terahertz

Yao

Chen

et al. 2021

Electronics

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In this paper, a tri-reflector compact antenna test range (CATR) consisting of a main parabolic reflector with a square aperture of 3 m in side length and two sub-reflectors of rotationally standard quadric surfaces working in terahertz is proposed. By using the equivalent paraboloid theory and cross-polarization elimination conditions and then combining with the appropriate shaped feed, the low cross-polarization and good quiet zone (QZ) performance of the system are achieved. The simulated results demonstrate that a cross-polarization isolation of >37 dB and a peak-to-peak amplitude (phase) ripple of <1.8 dB (13°) can be achieved on the principal cuts of the QZ at 100–500 GHz. At the same time, the QZ usage ratio of the CATR can reach 75%. The proposed tri-reflector CATR composed of standard quadric surfaces not only exhibits good quiet zone performance but also greatly reduces the manufacturing difficulty of the sub-reflectors and the construction cost of the system.

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“…Cat whisker antennas represented by very thin wires driven into semiconductor substrate were historically first used antennas with high-frequency SBDs back in the mid-sixties [22]. Horn antennas are used in sub-millimeter vision systems [23,24] and custom detectors. They operate at frequencies up to 1.6 THz [25].…”

Section: Introductionmentioning

confidence: 99%

“…They operate at frequencies up to 1.6 THz [25]. Horn antennas were used, e.g., in the William Hershel telescope [23]. Due to their high cost and complicated technology, they cannot be mass-produced.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Substrate Influence on Multielement THz Detector Operation

Sakhno

Gumenjuk-Sichevska²,

Сизов³

2014

J Infrared Milli Terahz Waves

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The development of THz multielement uncooled imagers based on focal plane arrays (FPAs) requires an optimization of the system parameters to achieve a homogeneous sensitivity of the array elements. Results of numerical simulation of the eight-element linear array of planar antennas with detecting elements, on a substrate of finite dimensions are presented. We establish how the substrate thickness h and the relative permittivity ε r influence antenna pattern and antenna-detector matching for each element. We show that the antenna pattern depends on the detector position more than the antennadetector impedance matching. The gain of array elements, the antenna-detector matching, and the homogeneity of the detector sensitivity can be simultaneously optimized by the proper choice of the substrate thickness h and the relative permittivity ε r . We show that multielement systems with large substrate thickness and high relative permittivity are not suitable for the imaging system implementation. To achieve uniform multielement system sensitivity, substrates with low permittivity (ε r <5) and/or low thickness (h< 60 μm for the Si substrate) should be used. Finally, we investigate the operation of the detector array with optimally chosen substrate parameters together with the focusing lens, and show that the system is able to work as FPA without significant image corruption.

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Terahertz Antenna Technology and Verification: Herschel and Planck - A Review

Cited by 19 publications

References 12 publications

6-Meter Beam Waveguide Antenna for Ground Based Terahertz Telescope

6-Meter Beam Waveguide Antenna for Ground Based Terahertz Telescope

Design of Low Cross-Polarization Tri-Reflector CATR with Standard Quadric Surfaces Working in Terahertz

Modeling of the Substrate Influence on Multielement THz Detector Operation

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