Results 21 to 30 of about 30,437 (345)
Design of Conformal Spiral Dual-Band Antenna for Wireless Capsule System
IEEE Access, 2021 This paper presents a conformal spiral antenna that is miniaturized and with dual-resonant for the wireless implantable capsule system. The spiral antenna conforms to a swallowable capsule with a radius of 3 mm and a length of 26 mm without occupying the
Kuo Liu +7 more
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Microstrip to parallel strip balun as spiral antenna feed [PDF]
, 2012 This paper presents the design and implementation of a microstrip to parallel strip balun which are frequently used as balanced antennas feed. This wideband balun transition is composed of a parallel strip which is connected to the spiral antenna and a ...
Coetzee, Jacob +2 more
core +2 more sources
Optimization of photomixers and antennas for continuous-wave terahertz emission [PDF]
, 2005 We have studied terahertz emission from interdigitated finger photomixers coupled to planar antenna structures. Using both pulsed and continuous-wave excitation, polarization measurements reveal that the antenna design dominates the properties of the
Baker, C. +7 more
core +1 more source
Asymptotic extraction approach for antennas in a multilayered spherical media [PDF]
, 2010 An efficient algorithm is introduced to enhance the convergence of dyadic Green's functions (DGF) in a layered spherical media where asymptotic expressions have been developed. The formulated expressions involve an infinite series of spherical eigenmodes
Khamas, S.K.
core +1 more source
An integrated spiral antenna system for UWB [PDF]
2005 European Microwave Conference, 2005 As wireless communication applications require more and more bandwidth, the demand for wideband antennas increases as well. For instance, the ultra wideband radio (UWB) utilizes the frequency band of 3.1-10.6 GHz. The spiral antenna has a higher spectral efficiency than other planar antennas like the patch antenna.
M. Karlsson, null Shaofang Gong
openaire +1 more source
High directivity fractal boundary microstrip patch antenna [PDF]
, 2000 A novel patch antenna with a fractal boundary condition is proposed. Experimental and numerical results corroborate the fact that the fractal characteristic of the perimeter produces localised modes.
Blanch Boris, Sebastián +3 more
core +2 more sources
A Novel Square-Spiral Strip Antenna [PDF]
2007 2nd International ITG Conference on Antennas, 2007 A square-spiral strip antenna is designed considering the procedure used to obtain log-periodic antennas. Simulation results of the new design are compared with those of the well known and widely used Archimedean spiral antenna in terms of the frequency dependency. The effect of dielectric substrate used to support the antennas is also investigated.
Saynak, Uğur, Kuştepeli, Alp
openaire +2 more sources
Concentric circles and spiral configurations for large correlator arrays in radio astronomy [PDF]
, 2018 Aperture synthesis arrays are commonly used in radio astronomy to take images of radio point sources, with the planned Square Kilometre Array (SKA) being the most common example.
Abidin, Zamri Zainal +6 more
core +2 more sources
Magnetic fields in merging spirals – the Antennae [PDF]
Astronomy & Astrophysics, 2004 We present an extensive study of magnetic fields in a system of merging galaxies. We obtained for NGC4038/39 (the Antennae) radio total intensity and polarization maps at 8.44, 4.86 and 1.49GHz using the VLA in the C and D configurations. The radio thermal fraction was found to be about 50% at 10.45GHz, higher than in normal spirals.
Chyzy, Krzysztof T., Beck, Rainer
openaire +2 more sources
Designing an Efficient Ultra Small Form Factor On-Chip Antenna for UHF RFID Application [PDF]
Radioengineering, 2019 The efficient design of electrically small antennas (ESA) has recently evolved to an outstandingly active area of research. This paper aims to present an improved performance electrically small on-chip antenna design, for the 920 MHz UHF-RFID frequency ...
B. Matolcsy, A. Zolomy
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