Results 41 to 50 of about 567,106 (189)

A Broadband Antenna Array Using Full-Wave Dipole

IEEE Access, 2017
This work introduces a bandwidth broadening technique for full-wave dipole (FWD) antennas and arrays, which are realized by introducing gaps in both two arms of the dipole.
Guang-Hua Sun, Sai-Wai Wong, Hang Wong
doaj   +1 more source

High-Bandwidth Organic Photodetector Analyzed by Impedance Spectroscopy [PDF]

IEEE Photonics Technology Letters, 2012
An organic bulk heterojunction photodetector (OPD) is fabricated on the basis of a blend of poly(3-hexyl thiophene):1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6) C61. The OPD responsivity is calculated from current density-voltage characteristic (J-V) under green-LED illumination obtaining 1 A/W.
Belen Arredondo, Cristina de Dios, Ricardo Vergaz, Gonzalo del Pozo, Beatriz Romero   +4 more
openaire   +1 more source

CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile

Open Physics, 2018
A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the ground plane ...
Liu Yilin, Huang Kama
doaj   +1 more source

Broadband Circularly Polarized Microstrip Patch Antenna Using Circular Artificial Ground Structure and Meandering Probe

IEEE Access, 2020
To enhance axial ratio (AR) bandwidth, this research proposes a circularly polarized (CP) single-fed microstrip patch antenna using a circular artificial ground structure (AGS) and meandering probe.
Khanet Pookkapund, Arnon Sakonkanapong, Ryuji Kuse, Chuwong Phongcharoenpanich, Takeshi Fukusako   +4 more
doaj   +1 more source

Self-reactive impedance surfaces for enhanced quasi-line wave propagation in the terahertz spectrum

Scientific Reports
Quasi-line waves represent a distinct class of propagation modes along non-complementary impedance surfaces, offering an alternative to the conventional line waves typically formed by complementary impedance surfaces.
Zahra Ahmadi, Hamed Saghaei, Mohammad Pasdari-Kia, Haddi Ahmadi, Nasrin Razmjooei, Farzaneh Sadat Ghoreishi, Kazem Zafari, Kamalodin Arik, Hamid Nezamdoost, Mahdi Nooshyar, Homayoon Oraizi   +10 more
doaj   +1 more source

Wideband blade monopole antenna with sleeved coaxial feed [PDF]

, 2009
A wideband planar monopole antenna requiring a small ground plane is described. Numerical and measured results confirms the antenna has good radiation efficiency and stable omni-directional radiation patterns over an impedance bandwidth of 4.1:1 covering
Morrow, Ivor L., Dingley, G. P., G. P. Dingley, W. G. Whittow, Cooper, A., I. L. Morrow, Whittow, W. G., A. Cooper   +7 more
core   +1 more source

Wide-gap evolved hybrid CPW–GCPW loaded dual symmetric ground shielding patches for compactness, wideband and low cross-polarisation

Engineering Science and Technology, an International Journal
This paper presents a coplanar waveguide (CPW) loaded with dual symmetric bottom ground patches on a 1.6 mm-thick FR4 substrate. The proposed CPW reflects as an evolved hybrid CPW–GCPW that integrates the characteristics of conventional CPW and grounded ...
Mohamad Faiz Mohamed Omar, Sharul Kamal Abdul Rahim, Mohamed Shalaby, Mohd Fadzil Ain, Asrulnizam Abd Manaf, Nurul Huda Abd Rahman, Hussein T. Mouftah, Zaid Ahmed Shamsan   +7 more
doaj   +1 more source

Compact Multiband Circularly Polarized Filtering Antenna

Journal of Studies in Science and Engineering
A miniature circularly polarised filtering antenna device is presented here. The device has an impeccably circular radiating patch coupled with pins to stripline circuits with open-loop ring resonators.
Kiran Sonawane, Pravin Patil
doaj   +1 more source

A Wideband Single-Fed, Circularly-Polarized Patch Antenna With Enhanced Axial Ratio Bandwidth for UHF RFID Reader Applications

IEEE Access, 2018
A wideband single-fed, circularly-polarized patch antenna with enhanced axial ratio bandwidth for RFID reader application is proposed. The antenna consists of a modified half E-shaped patch, a near-field resonant parasitic (NFRP) patch, and four rotated ...
Junlong Li, Hui Liu, Shuai Zhang, Miaohui Luo, Yuan Zhang, Sailing He   +5 more
doaj   +1 more source

Modified square uwb monopole antenna for improved impedance bandwidth

, 2008
Square monopole is modified to improve the impedance bandwidth. The modified square monopole has a step-generated circular base. The measured return loss below -10 dB is from 2.42 GHz to over 20GHz and good omnidirectional radiation pattern is also ...
He, Sailing,, Yao, J, Khan, S N, Shuai, Z   +3 more
core   +1 more source