Evaluation of the thin film polyimide‐based holographic metasurface inspired leaky‐wave antenna DOI
Praveen Kumar Sharma, Philip Ayiku Dzagbletey, Jae‐Young Chung

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(27)

Published: April 22, 2024

Abstract The proposed paper presents the design of a leaky‐wave antenna inspired by holographic metasurfaces employing thin film. Leveraging principle, this metasurface showcases its transformative capacity converting an omnidirectionally radiating monopole into highly directional emitting leaky waves. is constructed using film polyimide (PI) (Df = 0.008; Dk 3.5), measuring 50 μm in thickness. structure comprises multiple layers, commencing with top PI layer, succeeded 40 thick adhesive layer 0.004; 6). Subsequent includes Rogers RT/duroid 5880 substrate 0.0009; 2.20), grounded at bottom and has thickness 1.6 mm. meticulously tailored ensures optimal performance 15 GHz, facilitating radiation precise beam steering 10 degrees ( ϴ 10°). This innovative design, incorporating on film, significantly enhances antenna's performance, increasing gain from 1.5 dBi to 13.8 dBi.

Language: Английский

Broadband and Wide-Incidence-Angle Transparent Metamaterial Absorber Using Eight-Resistive-Arm Cell DOI
Minjae Lee, Jihye Park, Kyounghwan Kim

et al.

IEEE Antennas and Wireless Propagation Letters, Journal Year: 2024, Volume and Issue: 23(6), P. 1754 - 1758

Published: Feb. 22, 2024

In this study, we propose a broadband and wide-incidence angle optically transparent metamaterial absorber (MMA) using eight-resistive-arm cells. The MMA uses soda-lime glass as the substrate indium tin oxide (ITO) conductive pattern. Leveraging these materials, proposed achieves optical transparency of over 78.06% at 550 nm. Simulation results indicate an absorption ratio exceeding 90% in 7.49-10.01 GHz band for all polarizations under normal incidence. is verified through fabrication measurement. Under oblique incidence transverse electric magnetic modes, above ranges 8.0-9.01 up to 50 ${}^{\circ }$ 9.34-11.83 60 .

Language: Английский

Citations

3
Extremely Miniaturized Free-Space Measurement System for RF Metamaterial Composite Based on Beam Focusing Transmitarray DOI
Seungwoo Bang, Taeyeong Yoon, Byeongjin Kim

et al.

IEEE Antennas and Wireless Propagation Letters, Journal Year: 2024, Volume and Issue: 23(6), P. 1705 - 1709

Published: Feb. 20, 2024

This letter proposes a near-field beam focusing transmitarray-based (TA-based) free space measurement system that is extremely miniaturized rather than horn-to-horn and dielectric lens-based systems for radio frequency (RF) metamaterial composites. Reducing the size of setup limited due to natural phenomenon conventional systems. Contrastively, TA-based could overcome limitation because its phase-shifting ability maintain planar appearance. A device-under-test (DUT) was measured without any distortion utilizing characteristic proposed TA, which produces uniform wavefront phase diffraction over DUT aperture. The TA focus EM wave within distance 2 cm from horn antenna while maintaining error under $14.5^\circ$ , resulting in plane wave-like phase. Consequently, RF composites be at short focal 21.7% required by free-space additional absorbers. Further, response (i.e., notation="LaTeX">$|S_{21}|$ notation="LaTeX">$\angle S_{21}$ ) obtained adequately compared full-wave simulation. difference transmission zero between simulation less 1.6%.

Language: Английский

Citations

1
Design of a Compact and Minimalistic Intermediate Phase Shifting Feed Network for Ka-Band Electrical Beam Steering DOI Creative Commons
Sebastian Verho, Jae‐Young Chung

Sensors, Journal Year: 2024, Volume and Issue: 24(4), P. 1235 - 1235

Published: Feb. 15, 2024

Intermediate phase shifting is a footprint- and cost-reduction technique for reconfigurable feed networks. These networks are utilized in antenna arrays to perform electrical beam steering. In intermediate shifting, shifter shared between two adjacent antennas. Conventionally, antennas only have individual shifters. With shifters, we reduce the number of components footprint by 25%. Consequently, this decreases price enables designs at millimeter-wave frequencies where space limited due frequency-dependent spacing. This demonstrated designing network Ka-band that generates continuous shift profile Due use varactors novel biasing method, it does not require expensive beamformer integrated chips or lumped biasing. The combined with 4 × array demonstrate its beam-steering capabilities. result high-density minimalistic design fits small volume 25.6 0.95 mm3. array, main steered ±40∘ broadside, providing full 1D restricted 2D It potential candidate wireless sensor mobile

Language: Английский

Citations

0
Evaluation of the thin film polyimide‐based holographic metasurface inspired leaky‐wave antenna DOI
Praveen Kumar Sharma, Philip Ayiku Dzagbletey, Jae‐Young Chung

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(27)

Published: April 22, 2024

Abstract The proposed paper presents the design of a leaky‐wave antenna inspired by holographic metasurfaces employing thin film. Leveraging principle, this metasurface showcases its transformative capacity converting an omnidirectionally radiating monopole into highly directional emitting leaky waves. is constructed using film polyimide (PI) (Df = 0.008; Dk 3.5), measuring 50 μm in thickness. structure comprises multiple layers, commencing with top PI layer, succeeded 40 thick adhesive layer 0.004; 6). Subsequent includes Rogers RT/duroid 5880 substrate 0.0009; 2.20), grounded at bottom and has thickness 1.6 mm. meticulously tailored ensures optimal performance 15 GHz, facilitating radiation precise beam steering 10 degrees ( ϴ 10°). This innovative design, incorporating on film, significantly enhances antenna's performance, increasing gain from 1.5 dBi to 13.8 dBi.

Language: Английский

Citations

0