Results 21 to 30 of about 13,985 (315)
On the Design of Conical Antennas for Broadband Impedance Matching Performance
International Journal of Antennas and Propagation, 2017 In the scope of broadband radiators, the biconical antenna, or its monopole conical counterpart, is long known to be a proper choice. One common form of such radiator, the spherically capped conical antenna (SCCA), has closed-form solution to its input ...
Francisco Estêvão Simão Pereira +1 more
doaj +1 more source
Design of Cavity-Backed Bow-Tie Antenna with Matching Layer for Human Body Application
Sensors, 2019 This paper presents the broadband antenna for the microwave radiometric sensing of internal body temperature. For broadband operation, the bow-tie antenna was designed and backed with a cylindrical cavity, which decreased environmental electromagnetic ...
Jinho Jeong, Kihoon Park, Changmin Lee
doaj +1 more source
A broadband horizontally polarised omnidirectional antenna with stable radiation patterns
The Journal of Engineering, 2019 A broadband horizontally polarised omnidirectional antenna (HPOA) with stable radiation patterns is proposed. The antenna is composed of two orthogonal broadband HPOA units fed by a wideband power divider.
Zhou Lei, Cui Mantang, Lu Yangyi
doaj +1 more source
IEEE Open Journal of Antennas and PropagationIn this paper the authors describe the design of a broadband aperture-stacked patch (ASP) microstrip antenna based on a filtering equivalent circuit.
Ignacio M. Delgado-Lozano +3 more
doaj +1 more source
A Compact Broadband Stepped Bow-Tie Antenna for Ambient RF Energy Harvesting
IEEE Access, 2023 This paper presents a compact broadband stepped bow-tie antenna for ambient RF energy harvesting (RFEH). The proposed antenna consists of stepped shapes for wide bandwidth, making it possible to investigate ambient RF energy in entire cellular bands.
Seong-Jin Kim +3 more
doaj +1 more source
A New Antenna Capable of Generating Broadband Plane Spiral Orbital Angular Momentum
IEEE AccessThe plane spiral orbital angular momentum (PS-OAM), which is a special form of orbital angular momentum (OAM) beams, solves the problem of OAM beam divergence to some extent.
Na Li +3 more
doaj +1 more source
Broadband dual-plate monopole antennas
Twelfth International Conference on Antennas and Propagation (ICAP 2003), 2003 In this paper, dual-plate monopole antennas without and with a shorting pin and/or edge trimming have been studied. The experimental results of return loss have been presented, and compared with single plate monopole antennas. It has been shown that the lower end matching frequency can be lowered by 17% by using dual plates.
Wu, Z., Sevret, P., Ammann, Max
openaire +3 more sources
RF Performance of Layer-Structured Broadband Passive Millimeter-Wave Imaging System
International Journal of Antennas and Propagation, 2016 Low profile and simple configuration are advantageous for RF module in passive millimeter-wave imaging system. High sensitivity over broad operation bandwidth is also necessary to detect right information from weak signal.
Kunio Sakakibara +3 more
doaj +1 more source
Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source