High Gain Constrained Lens Antenna on BCB Substrate for 300-GHz Applications

Mahmoud, Adham; González‐Ovejero, David; Ettorre, Mauro; Sauleau, Ronan; Aniel, F.; Zerounian, N.; Grimault-Jacquin, A.-S.

doi:10.1109/apusncursinrsm.2019.8888899

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Indeed, the row composed of 19 periods presents an HPBW of 4 • (18.5 dBi gain for one row), while maintaining good input impedance matching. Besides, the same concept can likewise be employed at other frequencies [29]. In this use case, the LWA would be co-located with the transceivers on top of the racks in a structure that would offer in-plane mechanical rotation, as shown in Figure 11b.…”

Section: Featured Applicationmentioning

confidence: 99%

A Photonically-Excited Leaky-Wave Antenna Array at E-Band for 1-D Beam Steering

et al. 2020

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This manuscript reports the first leaky-wave antenna (LWA) array excited by a photomixer as well as its potential application for alignment in wireless links. The designed array is manufactured in printed circuit board (PCB) technology, works at the E-band (from 75 to 85 GHz), and provides a directive beam of about 18 dBi with a frequency scanning span of 22°. The antenna element consists of a microstrip line periodically loaded with stubs, and it has been designed employing a hybrid approach combining full-wave simulations and transmission line theory. This approach enables the optimization of the periods when the open-stopband of the LWA is mitigated or removed at the frequency of broadside emission. The proposed antenna was first tested using a ground signal ground (GSG) probe; the measured return loss and radiation patterns of the fabricated prototype were in good agreement with full-wave simulations. Then, the LWA array was integrated with the photomixer chip using conductive epoxy threads. Measurements of the radiated power yielded a maximum of 120 µW at 80.5 GHz for a 9.8 mA photocurrent. Finally, the antenna was used in a 25 cm wireless link, obtaining a 2.15 Gbps error-free data rate.

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Section: Featured Applicationmentioning

confidence: 99%

A Photonically-Excited Leaky-Wave Antenna Array at E-Band for 1-D Beam Steering

et al. 2020

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“…As an alternative, substrate integrated waveguide (SIW) technology are used under 200 GHz to reduce the costs and simplify the fabrication. If the required design frequency is higher, this would require metallized vias with a diameter smaller than 50 µm, which adds complexity to the fabrication procedure and increases its cost, similar to the air-based systems [15]. Moreover, selecting the appropriate materials with moderate losses is crucial for SIW to avoid a negative impact on the total efficiency of the radiating system.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost and Low-Profile Sub-Terahertz Luneburg Lens Beamformer on Polymer

Mahmoud

Ruiz‐García

Sagazan

et al. 2023

Antennas Wirel. Propag. Lett.

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Luneburg lens is used to excite a leaky-wave antenna (array of slots) in the sub-terahertz (sub-THz) frequency range. The antenna is built on a 140-µm thick Cyclic Olefin Copolymer (COC) substrate. The radiating slots (58×24 slots) are etched on the polymer by a photolithographic process, for which the gold (Au) layers are first deposited by evaporation on the COC and, then, patterned by chemical etching. No metalized vias or drilling are applied to the substrate. The full system is fed by a standard WR03 waveguide, and it has been fabricated and tested. Experimental results show an input reflection coefficient better than −7 dB over a 25% fractional bandwidth, spanning from 220 GHz to 290 GHz. The radiated beam can be steered in elevation from −80 ° to −20 ° over the same band. The antenna efficiency is estimated to be 20% at the center frequency (260 GHz). This solution provides a simple alternative for low-cost and low-profile beam scanning antennas in the sub-THz range.

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“…However, the advantages of such fabrication technologies come with high cost and complexity. In [8]- [9], Benzocyclobutene (BCB) polymer was used as substrate to fabricate a single-layer antenna operating at 300 GHz. The design was simple, but it had relatively high losses due to the small thickness of the spin-coated BCB (only 30 µm) and its high dielectric losses.…”

Section: Introductionmentioning

confidence: 99%

High-Gain Luneburg Lens on COC Substrate for 300-GHz Applications

Mahmoud¹,

Ruiz-García²,

Sagazan³

et al. 2022

2022 Microwave Mediterranean Symposium (MMS)

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A Luneburg lens quasi-optical beam-former is used to excite a leaky-wave antenna at 275 GHz. Both the lens and the antenna are fabricated on a Cyclic Olefin Copolymer (COC) substrate. The full system is etched on the polymer by photolithography. Numerical results show a reflection coefficient lower than −24 dB and a gain higher than 21 dBi over a 40% fractional bandwidth, spanning from 220 GHz to 330 GHz. The efficiency of the antenna is estimated to be 28% at the center frequency (275 GHz).

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High Gain Constrained Lens Antenna on BCB Substrate for 300-GHz Applications

Cited by 4 publications

References 9 publications

A Photonically-Excited Leaky-Wave Antenna Array at E-Band for 1-D Beam Steering

A Photonically-Excited Leaky-Wave Antenna Array at E-Band for 1-D Beam Steering

Low-Cost and Low-Profile Sub-Terahertz Luneburg Lens Beamformer on Polymer

High-Gain Luneburg Lens on COC Substrate for 300-GHz Applications

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