Results 81 to 90 of about 4,061 (210)

Multiband Radome Design for Satellite Communication Based on Particle Swarm Optimization

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
We present a methodology for the automatic design, optimization and validation of wide‐angle, multiband and multilayer radomes. The approach is demonstrated through a nontrivial case study involving realistic dispersive materials and six distinct TX/RX satellite communication bands. ABSTRACT Radomes play a fundamental role in protecting antenna systems
Olga Basile, Marco Simone, Santi C. Pavone, Gino Sorbello   +3 more
wiley   +1 more source

MODIFIED Π-SHAPED SLOT LOADED MULTIFREQUENCY MICROSTRIP ANTENNA

Progress In Electromagnetics Research B, 2015
A single layer, single feed microstrip antenna with multifrequency operation in compact size is proposed. A modified inverted π-shaped slot is introduced at the left side radiating edge of the patch to reduce the size of the antenna by reducing the resonant frequency.
Sudipta Das, Partha Pratim Sarkar, Santosh Kumar Chowdhury   +2 more
openaire   +1 more source

WFH: A Wideband Frequency Hopping‐Based Anti‐Jamming Navigation Signal Structure

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Given the limitations of existing satellite navigation signals in antijamming performance amid growing environmental jamming, this paper proposes a navigation signal structure based on wideband frequency hopping (WFH) modulation to enhance both antijamming capability and measurement accuracy. It further introduces the nonstationary effective carrier‐to‐
Chenyang Wang, Yihai Liao, Sicong Liu, Jianghong Shi, Ao Peng   +4 more
wiley   +1 more source

TERAHERTZ TECHNOLOGIES IN TELECOMMUNICATION SYSTEMS. PART 1. JUSTIFICATION OF THE FREQUENCY RANGE, DESIGN OF FUNCTIONAL NODES OF TERAHERTZ RANGE TELECOMMUNICATION SYSTEMS

Авіаційно-космічна техніка та технологія, 2018
The article presented results of researches conducted by the team of authors devoted to the possibilities of creation for the first time in Ukraine the real prerequisites for solving the fundamental problem of constructing digital telecommunication ...
Гліб Леонідович Авдєєнко, Сергій Георгійович Бунін, Теодор Миколайович Наритник   +2 more
doaj   +1 more source

Quad-band internal mobile phone antenna [PDF]

, 2007
A novel internal, quad-band antenna placed inside a ‘foldable’ type of Mobile Phone is presented. Its structure consists of a helical and a monopole element exciting two broad frequency bands.
Langley, R.J., Tzortzakakis, M.
core   +1 more source

Compact Wideband Dual-Frequency Antenna Based on a Simplified Composite Right/Left-Handed Transmission Line with Hilbert Curve Loading

International Journal of Antennas and Propagation, 2019
This paper addresses the issues of low bandwidth, gain, and efficiency of miniaturized microwave antennas by proposing a novel wideband dual-frequency coplanar waveguide antenna design based on a simplified composite right/left-handed (SCRLH ...
Tianpeng Li, Jian Zhang, Baowei Cheng, Xue Lei, Zhijian Xu, Jun Gao   +5 more
doaj   +1 more source

Antenna-assisted picosecond control of nanoscale phase transition in vanadium dioxide [PDF]

, 2016
Nanoscale devices in which the interaction with light can be configured using external control signals hold great interest for next-generation optoelectronic circuits.
A Cavalleri, A Pashkin, A Tittl, AKU Michel, AKU Michel, B Gholipour, BT O’Callahan, C Ríos, D Wegkamp, DJ Hilton, DJ Shelton, DW Ferrara, DY Lei, DY Lei, F Sterl, JA Schuller, JB Khurgin, JM Gaskell, K Appavoo, K Appavoo, K Shportko, M Abb, M Hada, M Seo, MA Kats, MJ Dicken, MK Liu, MM Qazilbash, N Strohfeldt, NI Zheludev, P Kühler, Q Wang, RF Waters, S Cueff, S Hosaka, T Driscoll, TV Son, UK Chettiar, Z Yang, ZJ Thompson   +39 more
core   +2 more sources

Fusion of Multifrequency GPR Data Freed From Antenna Effects

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2018
Several data fusion approaches have been developed to optimize both resolution and characterization depth for multifrequency ground-penetrating radar (GPR). In this study, we propose a novel physically based method to merge radar data coming from antennas operating in different frequency ranges.
Alberic De Coster, Sebastien Lambot
openaire   +2 more sources

Detection of Buried Inhomogeneous Elliptic Cylinders by a Memetic Algorithm [PDF]

, 2003
The application of a global optimization procedure to the detection of buried inhomogeneities is studied in the present paper. The object inhomogeneities are schematized as multilayer infinite dielectric cylinders with elliptic cross sections.
Caorsi, Salvatore, Massa, Andrea, Pastorino, Matteo, Raffetto, Mirco, Randazzo, Andrea   +4 more
core   +3 more sources

Spatial Identification Methods and Systems for RFID Tags [PDF]

, 2013
Disertační práce je zaměřena na metody a systémy pro měření vzdálenosti a lokalizaci RFID tagů pracujících v pásmu UHF. Úvod je věnován popisu současného stavu vědeckého poznání v oblasti RFID prostorové identifikace a stručnému shrnutí problematiky ...
Povalač, Aleš
core