Results 31 to 40 of about 803,402 (286)

Fiber Lens Based Optical Antenna Design for OWC With Full Beam Coverage

open access: yesIEEE Photonics Journal, 2021
In infrared optical wireless communications, narrow beams require the perfect calibration of the base station (BS) and user terminal (UT), which cannot support multiple moving users. This paper proposes a fiber lens based optical antenna, which employs a
Chen Sun   +3 more
doaj   +1 more source

Beam scanning one-dimensional leaky-wave antenna

open access: yes, 2022
Although the beam of a leaky-wave antenna (LWA) scans with frequency, steering through the broadside is usually challenging. Various methods have been developed to overcome this limitation.
Karmokar, D.K.
core   +1 more source

Novel Design Methodology for 3D-Printed Lenses for Travelling Wave Antennas

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
A novel methodology is introduced for designing bespoke homogeneous and graded index lenses for enhancing the gain of travelling wave antenna arrays (TWAs).
Aakash Bansal   +2 more
doaj   +1 more source

Low-loss broadband antenna for efficient photon collection from a coherent spin in diamond [PDF]

open access: yes, 2014
We report the creation of a low-loss broadband optical antenna giving highly directed output from a coherent single spin in the solid state. The device, a crystalline solid-state realization of a dielectric antenna, is engineered for individual nitrogen ...
Warburton, Richard J.   +7 more
core   +1 more source

Reconfigurable tri-band H-shaped antenna with frequency selectivity feature for compact wireless communication systems [PDF]

open access: yes, 2011
This is the post-print version of the Article. The published version can be accessed from the link below - Copyright @ 2011 IETThis study presents an H-shaped reconfigurable antenna for wireless applications.
AbuTarboush, HF   +14 more
core   +1 more source

Antenna Study and Design for Ultra Wideband Communication Applications [PDF]

open access: yes, 2006
PhDSince the release by the Federal Communications Commission (FCC) of a bandwidth of 7.5GHz (from 3.1GHz to 10.6GHz) for ultra wideband (UWB) wireless communications, UWB is rapidly advancing as a high data rate wireless communication technology.
Liang, Jianxin
core   +4 more sources

Large-Aperture Metamaterial Lens Antenna for Multi-Layer MIMO Transmission for 6G

open access: yesIEEE Access, 2022
A metamaterial lens refers to a planar structure having multiple metamaterial unit cells capable of manipulating electromagnetic waves to improve antenna gains by changing their shape, geometry, size, or orientation.
Jaehyun Lee, Hogyeom Kim, Jungsuek Oh
doaj   +1 more source

Metasurface-Based Lens for Antenna Gain Enhancement and Radar Cross Section Reduction

open access: yesIEEE Photonics Journal, 2019
In this paper, leveraging the resonant phase and the geometry phase simultaneously, we demonstrated a low scattering lens antenna, which can work at both transmission and reflection mode.
Jianing Yang   +5 more
doaj   +1 more source

Broadband inhomogeneous lens with conical radiation pattern

open access: yesScientific Reports, 2023
This manuscript presents a lens antenna with simultaneous broadside and conical beams. The lens is designed for the Ku band using the ray inserting method.
Mohammad Mahdi Taskhiri, Saeed Fakhte
doaj   +1 more source

Novel small-size directional antenna for UWB WBAN/WPAN applications [PDF]

open access: yes, 2005
This paper presents a novel small-size directional antenna design for ultrawide-band wireless body area networks/wireless personal area networks applications.
G. Troster   +10 more
core   +2 more sources

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