Results 11 to 20 of about 56,526 (292)

Compact metallic RFID tag antennas with a loop-fed method [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2011
Several compact, low profile and metal-attachable RFID tag antennas with a loop-fed method are proposed for UHF RFID systems. The structure of the proposed antennas comprise of two parts: (1) The radiator part consists of two shorted patches, which can ...
Chew, WC   +4 more
core   +4 more sources

Broadband pattern‐reconfigurable water loop antenna, pattern‐reconfigurable water loop antenna

open access: yesIET Microwaves, Antennas & Propagation, 2021
Abstract A novel loop antenna is proposed here. This antenna uses an annular arm made of pure water to take the place of the metallic loop of a typical loop antenna. The water arm is enclosed by a resin loop tube.
Zhen Ren, Shi‐Shan Qi, Wen Wu
openaire   +2 more sources

ELECTRICALLY SMALL DIPOLE, SPIRAL AND LOOP ANTENNAS [PDF]

open access: yesРадиофизика и электроника, 2017
The results of studies in the range of microwave radio characteristics of linear wire electrically small antennas, which important properties are small size and weight, are presented.
V. V. Ovsyanikov
doaj   +1 more source

Loop-Antenna Calibration

open access: yesIEEE Antennas and Propagation Magazine, 2011
Loop-antenna calibration is discussed in this tutorial. Loop antennas are especially used in low-frequency radiated-emission (RE) and radiated-susceptibility (RS) measurements and tests. These are important in commercial systems, but critical in military systems.
Soydan Cakir   +3 more
openaire   +2 more sources

A Compact Four-Port Coplanar Antenna Based on an Excitation Switching Reconfigurable Mechanism for Cognitive Radio Applications

open access: yesApplied Sciences, 2019
In this paper, we propose a compact four-port coplanar antenna for cognitive radio applications. The proposed antenna consists of a coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna and three inner rectangular loop antennas. The dimensions of the
Yeonjeong O, Yunnan Jin, Jaehoon Choi
doaj   +1 more source

Compact Double Shorted Loop Sub-6-GHz Dual-Band MIMO Quad-Antenna System

open access: yesIEEE Access, 2021
This paper presents the design of a compact double-loop sub-6-GHz dual-band MIMO quad-antenna system for 5G laptops. To meet the market demand for laptops with a high screen-to-body ratio, the sub-6-GHz dual-band MIMO quad-antenna system is realized to ...
Shu-Chuan Chen   +2 more
doaj   +1 more source

Focused Planar Electromagnetic Waves for Enhanced Near-Field Microwave Imaging With Verification Using Tapered Gradient-Index Lens Antenna

open access: yesIEEE 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

A Practical Cooperative Multicell MIMO-OFDMA Network Based on Rank Coordination [PDF]

open access: yes, 2013
An important challenge of wireless networks is to boost the cell edge performance and enable multi-stream transmissions to cell edge users. Interference mitigation techniques relying on multiple antennas and coordination among cells are nowadays heavily ...
Clerckx, Bruno   +3 more
core   +3 more sources

Loop Antennas for Use On/Off Ground Planes

open access: yesIEEE Access, 2020
Many applications benefit from the ability of an RFID tag to operate both on and off a conducting ground plane. This paper presents an electrically small loop antenna at 433 MHz that passively maintains its free-space tune and match when located a ...
John J. Borchardt
doaj   +1 more source

Magneto-Electric Dipole Antenna Arrays [PDF]

open access: yes, 2014
A planar magneto-electric (ME) dipole antenna array is proposed and demonstrated by both full-wave analysis and experiments. The proposed structure leverages the infinite wavelength propagation characteristic of composite right/left-handed (CRLH ...
Caloz, Christophe   +2 more
core   +3 more sources

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