Results 31 to 40 of about 41,921 (300)
The eleven antenna: a compact low-profile decade bandwidth dual polarized feed for reflector antennas [PDF]
, 2006 A novel dual polarized ultrawide-band (UWB) feed with a decade bandwidth is presented for use in both single and dual reflector antennas. The feed has nearly constant beam width and 11 dBi directivity over at least a decade bandwidth.
Kildal, Per-Simon +2 more
core +1 more source
A practical theorem on using interferometry to measure the global 21-cm signal [PDF]
, 2016 The sky-averaged, or global, background of redshifted $21$ cm radiation is expected to be a rich source of information on cosmological reheating and reionizaton.
Chang, Tzu-Ching +3 more
core +3 more sources
IEEE Access, 2022 Radar-based algorithms for electromagnetic (EM) imaging are developed based on the assumption that EM has a local planar wave front inside the imaging domain.
Azin S. Janani +3 more
doaj +1 more source
Wide dipole antennas for wireless powering of miniaturised bioelectronic devices
Sensing and Bio-Sensing Research, 2020 Biomedical electronic implants require a power source to operate. Miniaturised implants can preclude batteries and as implant dimensions reduce further, inductive power transfer no longer becomes the optimum strategy for wireless power delivery.
Ammar Aldaoud +9 more
doaj +1 more source
Optimum Antenna Characteristics for Maximally Harvesting Ambient RF Energy
IEEE Open Journal of Antennas and Propagation, 2022 This paper investigates the best antenna characteristics to harvest ambient RF waves maximally. The proposed approach analyzes and compares key design aspects, including multi-polarization, multi-port, multi-band, omnidirectional, quasi-isotropic, and ...
Constant M. A. Niamien
doaj +1 more source
An investigation into the Gustafsson limit for small planar antennas using optimisation [PDF]
, 2013 The fundamental limit for small antennas provides a guide to the effectiveness of designs. Gustafsson et al, Yaghjian et al, and Mohammadpour-Aghdam et al independently deduced a variation of the Chu-Harrington limit for planar antennas in different ...
Lewis, Andrew +2 more
core +2 more sources
Meshed High-Impedance Matching Network-Free Rectenna Optimized for Additive Manufacturing
IEEE Open Journal of Antennas and Propagation, 2020 Additive manufacturing using direct-write or screen printing represent low-waste methods for fabricating antennas on low-cost flexible substrates. To realize rectennas using low-resolution printing methods, high-impedance antennas with simple printable ...
Mahmoud Wagih +2 more
doaj +1 more source
A broadband dual‐polarised antenna with L‐shaped strips for long‐term evolution/5G application
IET Microwaves, Antennas & Propagation, 2023 A broadband dual‐polarised antenna with L‐shaped strips for long‐term evolution (LTE)/5th generation mobile networks (5G) is proposed in this article. Based on the principle of multi‐mode resonance, wide bandwidth is achieved with L‐shaped strips and H ...
Rui Wu +3 more
doaj +1 more source
A hybrid time-domain model for pulsed terahertz dipole antennas [PDF]
Journal of the European Optical Society-Rapid Publications, 2009 In this paper we study the effect of the length of dipole antennas on the spectrum of the radiated THz signal in pulse-excited opto-electronic terahertz systems.
Ezdi K. +7 more
doaj +1 more source
IEEE Access, 2022 This study presents a dual-port single-dipole MIMO antenna pair, which is accomplished by selectively exciting the dominant dipole-type current mode and the second higher current mode of a single suspended metal strip. A magnetic coupling method based on
Longyue Qu, Haiyan Piao
doaj +1 more source