Results 91 to 100 of about 16,826 (314)

Coplanar waveguide-fed ultra-wideband planar antenna with WLAN-band rejection

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
A compact coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna is proposed with band-notched characteristic. The antenna has compact size of 29 x 31 mm². A novel wide polygon-slot is inserted on the antenna to obtain good impedance matching and wide
A. Subbarao, S. Raghavan
doaj   +1 more source

Wideband Dual-Polarized Quasi-Omnidirectional Antenna with High Isolation for Mobile Applications in High-Speed Vehicles

International Journal of Antennas and Propagation, 2019
A new wideband dual-polarized (DP) quasi-omnidirectional antenna is proposed. The DP antenna consists of a vertical slot for horizontal polarization (HP) and a folded horizontal slot for vertical polarization (VP). A tapered strip is employed to coupling
Peng Luo, Chengguo Nie, Qing Gong, Yuehui Cui   +3 more
doaj   +1 more source

Feed model for the tapered slot antennas [PDF]

2008 4th International Conference on Ultrawideband and Ultrashort Impulse Signals, 2008
In this paper we will describe the feed model for the tapered slot antennas (TSAs) and will find one of the important parameter of this model - transformation coefficient.
openaire   +2 more sources

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Substrate Integrated Waveguide Antenna Applications [PDF]

, 2015
The research objective of this thesis is to provide a better solution for signal interference and reduce the size of waveguide antenna. The background investigations of different waveguide fabrication technologies and switch control methods are detailed ...
WU, LIANG
core  

Simulation and measurement of quasi-optical multipliers [PDF]

, 2000
The lumped-element finite-difference time-domain method is used to analyze quasi-optical multipliers based on diode loaded slot antennas. The method is validated firstly for a passive microstrip-fed structure then for the diode loaded case in both small-
Cryan, MJ, Roselli, L, Helbing, S, Mezzanotte, P, Alimenti, Federico, Roselli, Luca, Sorretino, R, Alimenti, F, Sorrentino, Roberto, Sorrentino, R, Mezzanotte, Paolo   +10 more
core   +1 more source

Improved Bandwidth of Microstrip Wide-Slot Antenna Using Gielis Curves

IEEE Access
The development of a broadband printed wide-slot antenna based on Gielis curves is presented in this article. The printed wide-slot antenna can be conveniently reshaped to achieve ultra-wideband performance by using superformula.
Davood Zarifi, Ali Farahbakhsh, Michal Mrozowski   +2 more
doaj   +1 more source

A Novel Concentric Annular-Ring Slot Dual-Band Circularly Polarized Microstrip Antenna

International Journal of Antennas and Propagation, 2018
A simple structure concentric annular-ring slot dual-band circularly polarized (CP) microstrip antenna operating at ISM band (2.45 GHz) and 5G band (3.5 GHz) is proposed in this paper.
Yong Cheng, Hui Liu
doaj   +1 more source

A Programmable Multi‑Modal Information Encryption System Based on the Dynamic Wetting Behavior of Liquid Metal

Advanced Science, EarlyView.
This work presents a programmable multimodal information encryption device that harnesses the dynamic wetting behavior of liquid metal to achieve secure, reconfigurable, and high‐precision encryption and decryption of diverse data types, including text and images.
Xuedong Qiang, Min Mao, Yihao Wang, Nan Li, Mengyu Jiang, Chenkun Sun, Bangdeng Du, Jifei Ye, Linyan Wang, Fei Zhan, Lei Wang   +10 more
wiley   +1 more source

Triple band double U-slots patch antenna for WiMAX mobile applications [PDF]

, 2008
A small triple-band 2.7 GHz, 3.2 GHz and 5.3 GHz compact microstrip patch antenna with two U-shaped slots and a small ground plane is presented. It has been developed to be used in future WiMAX technology.
AbuTarboush, HF, Nilavalan, R, Al-Raweshidy, H   +2 more
core