Results 31 to 40 of about 4,135 (264)
Electronics Letters, 2006 A new class of reconfigurable antenna based on monopole structures containing liquid dielectrics is presented. It was determined that the operating principle of this class of antenna is essentially that of a dielectric resonator, where salt (in solution) modifies the dielectric properties. The resonator column height determined the operating frequency,
H. Fayad, P. Record
openaire +1 more source
Design and analysis of ultra-wideband antennas for transient field excitations [PDF]
Advances in Radio Science, 2016 This work addresses the design of two ultra-wideband antennas for the application of transient field measurements that are characterized by frequency spectra that typically range from a few MHz to several GHz.
M. Kotzev, M. Kreitlow, F. Gronwald
doaj +1 more source
An Unbalanced Sinuous Antenna for Near-Surface Polarimetric Ground-Penetrating Radar
IEEE Open Journal of Antennas and Propagation, 2020 Sinuous antennas are capable of producing ultra-wideband radiation with polarization diversity. This capability makes the sinuous antenna an attractive candidate for UWB polarimetric radar applications. Additionally, the ability of the sinuous antenna to
Dylan A. Crocker, Waymond R. Scott
doaj +1 more source
Investigation of Flexible Textile Antennas and AMC Reflectors
International Journal of Antennas and Propagation, 2012 In this paper, two different methods for fabric characterization are presented: a single frequency method and a broadband method. Felt and denim fabrics are characterized, and patch antennas are designed using these substrates to test both methods ...
M. Mantash +3 more
doaj +1 more source
IET Microwaves, Antennas & Propagation, 2023 In this study, a compact wideband circularly polarised Multiple Input Multiple Output (MIMO) antenna with the two parasitic elements is proposed. The printed monopole antenna for wideband circular polarisation proposed in authors' previous study is used ...
Zin Mar Phyo +2 more
doaj +1 more source
Физика волновых процессов и радиотехнические системыBackground. The main properties and characteristics of focused antenna systems using narrowband signals are known and generally coincide with the properties of broadband discrete antennas with a symmetric spectrum.
Denis A. Vedenkin
doaj +1 more source
Antenna systems for broadband wireless access [PDF]
IEEE Communications Magazine, 2002 Broadband wireless access along with evolving mobile Internet and multimedia services are driving the surge of research and development activities for future wireless communication systems. We provide an overview of antenna systems for broadband wireless communications and introduce some of the important issues surrounding them.
Ross D. Murch, Khaled Ben Letaief
openaire +2 more sources
International Journal of Antennas and PropagationIn this paper, we propose an improved adaptive frequency sweep strategy based on the asymptotic waveform evaluation (AWE) technique for simulating broadband antennas across a wide frequency range.
Zhijun Cai +7 more
doaj +1 more source
A low‐profile planar end‐fire broadband antenna with wide beamwidth
IET Microwaves, Antennas & Propagation, 2023 A low‐profile planar end‐fire broadband antenna with wide beamwidth is presented. The proposed antenna consists of a grounded coplanar waveguide (GCPW), an antipodal dipole, and a pair of directors.
Hui Xue +4 more
doaj +1 more source
Broadband THz Corrugated Bull’s Eye Antennas
IEEE Access, 2021 A 3-dB gain and input impedance bandwidth enhancement technique for THz periodically corrugated metallic antennas, also known as Bull’s Eye antennas, is presented. A novel design that exploits the depth qualities of the corrugations is introduced,
Despoina Kampouridou +1 more
doaj +1 more source