Results 31 to 40 of about 735,881 (338)

Analysis of Reflector Antennas in Radio Telescopes

Advanced Electromagnetics, 2016
We present an analysis on the performance of the Cassegrain and Gregorian on-axis, off-axis and offset antennas. In our study, we have adopted the design parameters for the Cassegrain configuration used in the Atacama Large Millimeter Array (ALMA ...
K. H. Yeap, M. C. Loh, C. Y. Tham, C. Y. Yiam, K. C. Yeong, K. C. Lai   +5 more
doaj   +1 more source

Leaky Horns: A New Paradigm of Developing Electromagnetic Horns Based on Leaky-Wave Structures

Electromagnetic Science
More than one-century history of microwaves has witnessed two seemingly unrelated developments of leaky-wave and horn antennas. While conventional horns cannot be made free from phase error even though the optimum horn criterion is adopted, this problem ...
Dongze Zheng, Ke Wu, Wei Hong
doaj   +1 more source

Design, fabrication and testing of pyramidal horn antenna [PDF]

, 2015
Horn antennas are widely used in areas of wireless communications, electromagnetic sensing, nondestructive testing and evaluation, radio frequency heating and biomedicine.
Abhignya, G. (G), Yogita, B. (B), Abhinay, C. (C), Balaji, B. (B), Murthy, M. (MBR)   +4 more
core   +2 more sources

Millimeter-Wave System for High Data Rate Indoor Communications [PDF]

, 2009
This paper presents the realization of a wireless Gigabit Ethernet communication system operating in the 60 GHz band. The system architecture uses a single carrier modulation. A differential encoded binary phase shift keying modulation and a differential
Kokar, Yvan, Rakotondrainibe, Lahatra, Zaharia, Gheorghe, Zein, Ghaïs El   +3 more
core   +4 more sources

Performance Analysis of X Band Horn Antennas using Additive Manufacturing Method Coated with Different Techniques

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this study are analyzed horn antennas to operating at X band (8 – 12 GHz) and manufactured by additive manufacturing method (AM). To construct the antennas using AM method was necessary made the structure with acrylonitrile butadiene styrene (ABS ...
Euclides L. Chuma, Yuzo Iano, Leonardo L. Bravo Roger, Mathias Scroccaro, Felipe Frazatto, Leandro Tiago Manera   +5 more
doaj   +1 more source

GSM filtering of horn antennas using modified double square frequency selective surface

, 2017
In this work, a dual‐band frequency selective surface (FSS) is proposed to be placed perpendicularly into the apertures of horn antennas for prefiltering 900 and 1800 MHz GSM signals interfering during the signal reception, with the enhanced return loss,
F. Güneş, Zafar Sharipov, M. A. Belen, P. Mahouti   +3 more
semanticscholar   +1 more source

Low–Cost 3D–Printed Standard Gain Horn Antennas for Millimetre–Wave Applications

Journal of Manufacturing and Materials Processing
This paper presents additively manufactured (3D printed) several standard gain horn antennas which have been designed to ensure simple and low–cost fabrication.
Shaker Alkaraki, Zia Ullah Khan, Syeda Fizzah Jilani, Andy Andre Sarker, James R. Kelly, Akram Alomainy   +5 more
doaj   +1 more source

The Design of Pixelated SIW Horn Antennas With Nearly Equal Beamwidths Using Binary Ink Stamp Optimization

IEEE Access, 2021
In this paper, linearly and circularly polarized single-layer Substrate Integrated Waveguide (SIW) horn antennas with nearly equal half power beamwidths in principal planes for the 24 GHz ISM band are designed.
Jaroslav Zechmeister, Jaroslav Lacik, Petr Kadlec   +2 more
doaj   +1 more source

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, EarlyView.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source