Results 21 to 30 of about 27,798 (269)
A Wideband Ultra-Low-Profile Solar Cell–Integrated Antenna [PDF]
Journal of Electromagnetic Engineering and Science, 2023 In this paper, a wideband ultra-low-profile solar cell–integrated antenna with a high form factor is presented. A copper indium gallium selenide-based solar cell was used for the proposed design.
Ahmed Ali +6 more
doaj +1 more source
Q-Factor Bounds for Microstrip Patch Antennas [PDF]
IEEE Transactions on Antennas and Propagation, 2023 Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth.
Ben A. P. Nel +2 more
openaire +1 more source
Measurement of HF monopole antenna array ground wave gain, antenna factor, and antenna noise factor [PDF]
2001 IEEE EMC International Symposium. Symposium Record. International Symposium on Electromagnetic Compatibility (Cat. No.01CH37161), 2002 This paper presents a practical way to measure the ground wave gain G/sub GW/, ground wave antenna factor AF/sub GW/, and antenna noise factor F/sub a/(Mon) of monopoles used in BF antenna arrays. It shows measurement results taken from June 1997 to September 1999 at five geographically separated HIT arrays.
openaire +2 more sources
On the use of Purcell factors for plasmon antennas [PDF]
Optics Letters, 2010 The Purcell factor is the standard figure of merit for spontaneous emission enhancement in microcavities, that has also been proposed to describe emission enhancements for plasmonic resonances. A comparison is made of quality factor, mode volume and Purcell factor for single and coupled plasmon spheres to exact calculations of emission rates. The paper
openaire +3 more sources
Factorization of Antenna Efficiency of Aperture-Type Antenna: Beam Coupling and Two Spillovers [PDF]
IEEE Transactions on Antennas and Propagation, 2021 Antenna efficiency is one of the most important figures-of-merit of a radio telescope for observations especially at millimeter wavelengths or shorter wavelengths, even for a multibeam radio telescope. To analyze a system with a beam waveguide, a lossless antenna consisting of two apertures in series is considered in the frame of the scalar wave ...
Makoto Nagai +2 more
openaire +2 more sources
Antenna factorization of gauge-theory amplitudes [PDF]
Physical Review D, 1998 I derive a single factorization formula which summarizes all soft and collinear divergences of a tree-level gauge theory amplitude. The singular factor squared is in a certain sense the generalization of the Catani-Seymour dipole factorization formula.
openaire +2 more sources
Minimization of Antenna Quality Factor [PDF]
IEEE Transactions on Antennas and Propagation, 2017 9 pages, 8 figures, 2 tables, submitted to IEEE ...
Miloslav Capek +2 more
openaire +2 more sources
Antenna factorization in strongly ordered limits [PDF]
Physical Review D, 2005 When energies or angles of gluons emitted in a gauge-theory process are small and strongly ordered, the emission factorizes in a simple way to all orders in perturbation theory. I show how to unify the various strongly-ordered soft, mixed soft-collinear, and collinear limits using antenna factorization amplitudes, which are generalizations of the ...
openaire +2 more sources
ESTIMATION OF ANTENNA FACTOR OF MICROSTRIP PATCH ANTENNA AS EMI SENSOR [PDF]
Progress In Electromagnetics Research Letters, 2008 This paper presents the result for antenna factor of microstrip patch antenna when used as electromagnetic interference (EMI) sensor. Antenna factor is an important parameter of a sensor used for EMI measurements. The microstrip antenna has found wide application as transmit and receive antenna in modern microwave systems.
Saswati Ghosh +2 more
openaire +1 more source
Traceable calibration of a horizontally polarised reference antenna with omnidirectional pattern at VHF frequencies for ILS field strength validation [PDF]
Advances in Radio Science, 2013 We present a traceable calibration of a specially designed horizontally polarised reference antenna with an omnidirectional pattern in the E-plane for the frequency range between 105 MHz and 120 MHz. This antenna is used as a validation tool for absolute
T. Schrader +2 more
doaj +1 more source