Tapered waveguide feed for integrated dielectric lens antenna performance tests

Fernandes, Carlos A.; Lima, Eduardo B.; Costa, Jorge R.

doi:10.1109/eurocon.2011.5929291

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…In addition to the performance improvements, the lens is less expensive to fabricate and more lightweight than comparable metal parts without the need for high-tolerance machining, providing a cost-effective structure for millimeter-wave applications. Homogenous 18 -a 215-420 FDM solid [13] Homogenous -a 10 60-65 CNC [18] Gradient e r 30 -a 90-100 CNC a Result not given in source.…”

Section: Discussionmentioning

confidence: 99%

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Three-dimensional (3D) Printed Dielectric Lens and Support Structure Mounted on an Open-Ended W-Band Waveguide

2023

RSL

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A dielectric lens and support structure is designed and fabricated using three-dimensional printing. The lens is mounted onto an open-ended WR-10 waveguide and directly radiates into free space. The lens body has a relative permittivity that is lower than the polylactic acid (PLA) used to print the lens by lowering the infill fraction of the lens in the printer slicing software (PrusaSlicer version 2.5.0). A printed dielectric feed wedge is used to improve the radiating structure's return loss, resulting in an input reflection better than À10 dB across the entirety of WR-10 band from 75 GHz to 110 GHz. The lens exhibits a measured peak gain of 19.5 dBi at 100 GHz, with a maximum gain variation of 1.3 dB from 75 GHz to 110 GHz and uniform radiation characteristics in both the Ẽ plane and H plane. The lens provides a reduction in Ẽ-plane sidelobe levels (SLLs) compared with a standard gain WR-10 horn by approximately 10 dB across the band. Further reduction in the SLLs below 100 GHz is achieved by painting the base of the lens with a conductive RF shielding paint.

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Section: Discussionmentioning

confidence: 99%

“…Dielectric inserts and dielectric rods have been used as an alternative to conductive machined transitions to transition from waveguide to free space [3,[12][13][14][15][16]. Among these works, only the C-band dielectric radiating structure in [3] is fabricated using 3D printing.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional (3D) Printed Dielectric Lens and Support Structure Mounted on an Open-Ended W-Band Waveguide

2023

RSL

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“…Figure 1(a) shows one example of a dedicated V-band waveguide feed produced at IT [51], [52] that is used in Section 5. Near its open end, the waveguide is loaded with a high permittivity dielectric wedge and tapered down to a narrow 1.4-mm square aperture designed to present a good power transfer to the lens.…”

Section: Lens Feedsmentioning

confidence: 99%

“…A similar feed was fabricated for the Q-band (30-50 GHz) with the same external dimensions, producing exactly the same symmetric radiation pattern and the same directivity [52] to allow testing wideband lenses by separate subbands.…”

Section: Lens Feedsmentioning

confidence: 99%

Review of 20 Years of Research on Microwave and Millimeter-wave Lenses at "Instituto de Telecomunicaço˜es"

Fernandes

Costa

Lima

et al. 2015

IEEE Antennas Propag. Mag.

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Starting from a challenge in the early 1990s to develop a highly shaped beam dielectric lens antenna for a pilot 150 Mb/s cellular mobile broadband system operating in the 60-GHz band, several new developments have been accomplished over more than 20 years at Instituto de Telecomunicações [1] in the areas of millimeter-wave shaped dielectric lens antennas and planar metamaterial lenses. We review here a few representative examples with numerical and experimental results, covering applications in mobile broadband communications, radiometry, satellite communications, multigigabit short-range communications, and sublambda near-field target detection.

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