Terahertz Near-Field Focusing Using a 3-D Printed Cassegrain Configuration for Backscattered Side-Channel Detection

Adibelli, Sinan; Juyal, Prateek; Cheng, Chia-Lin; Zajić, Alenka

doi:10.1109/tap.2019.2922758

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…The latter case is faster and more inexpensive that the other two and it is especially suitable when dielectric is the manufacturing material, since it can be applied with aerosol or painting. This metallization technique gives generally good results as it can be observed for instance in [19], where a 3D printed reflector antenna is used in terahertz band and conductive silver spray is used.…”

Section: Introductionmentioning

confidence: 85%

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3D-Printed Dual-Reflector Antenna With Self-Supported Dielectric Subreflector

et al. 2020

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A dual-reflector antenna with a self-supported subreflector is proposed. The supporting structure is made of dielectric material and it is part of the feeding of the antenna, which is based on Cassegrain optics and works at X-band. The feeding subsystem includes the primary feed, subreflector supporting structure and subreflector surface in a single dielectric piece, resulting in a compact, light and low-cost solution. First, the subreflector and its feeding subsystem, based on a Dielectric Rectangular Waveguide (DRW) along with a hyperboloid, are described, and the phase center of the DRW and the antenna optics are defined. Then, two effective techniques to mitigate the refraction caused by the dielectric were proposed. Finally, the design was validated through the fabrication of a Cassegrain antenna using a 3D printing technique. Measurements and simulations show a very good agreement and an antenna of 26 dBi of directivity with overall very good performances is obtained, validating both the proposed subreflector and the designing technique. INDEX TERMS Reflector antenna, dual-reflector antenna, 3D printed antennas, aperture antenna, fused filament fabrication, Cassegrain optics.

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Section: Introductionmentioning

confidence: 85%

“…13. The pieces were printed in PLA with a precision of 0.2 , enough since the wavelength at 10 GHz is much larger and small imperfection on the reflector surfaces intrinsic to the manufacturing process do not affect the performance [19].…”

Section: B Primary Feed Characterizationmentioning

confidence: 99%

3D-Printed Dual-Reflector Antenna With Self-Supported Dielectric Subreflector

et al. 2020

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“…As a classical antenna, the reflector antenna has an important position in engineering applications owing to its advantages of power, efficiency, and structure [5]- [7]. An innovative way to use a suitable dual polarization transition and receiver system on a existing C-band horn antenna to enable a 100-foot casserain antenna to work in the Xband is introduced in detail in [5].…”

Section: Introductionmentioning

confidence: 99%

“…In [6], a novel highisolation 35/94-GHz dual-frequency orthogonal cassegrain antenna was designed and analyzed. A three-dimensional (3D) printed cassegrain antenna for THz near-field focusing is used in back scattered side-channel detection, and the parameters and performance of 3D printed cassegrain antenna were analyzed in [7]. To achieve excellent gain, bandwidth, polarization, and radiation patterns, diagonal horn antennas are widely used in MMW and THz applications [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

Design of 94GHz Dual-Polarization Antenna Fed by Diagonal Horn for Cloud Radars

et al. 2022

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In this paper, a 94 GHz dual-polarization high-isolation cassegrain antenna feed by a diagonal horn antenna is designed. The antenna consists of a D = 540 mm main reflector, sub-reflector, and dual-port dual-polarization diagonal horn feed antenna. To obtain similar feed horn E-H radiation patterns, gain, high polarization, and port isolation, a dual-port diagonal horn was designed in the feed. The measured antenna gains are 50.85 dBi and the side-lobe levels are -24.5 dB at E-H radiation patterns of two ports at 94 GHz, respectively. The VSWRs of port 1 and port 2 are less than 1.5:1 in the range 93.2-95.3 GHz, witch meets the working requirements of frequency modulated continuous wave and pulse cloud radars. And the isolation between the two ports is above -50 dB, whereas the polarization isolation of each port is above 40 dB. The proposed W-band antenna is a suitable candidate for the dual-polarization cloud radars.INDEX TERMS Cassegrain antenna, diagonal horn antenna, dual-polarization, high isolation, similar beam.

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“…However, few scholars have studied NFF antennas based on 3-D printing technique. A backscatter side-channel detection using terahertz near-field focusing was presented in [29], where an NFF antenna was fabricated by the 3-D printing technique. A novel 3-D printed NFF lens antenna operating at 300 GHz was presented in [30].…”

Section: Introductionmentioning

confidence: 99%