Results 31 to 40 of about 4,217 (164)

Design of Broadband Aperture-Coupled Microstrip Antenna Arrays With Differential Feeding

open access: yesIEEE Access
This paper proposes the design of broadband microstrip antennas fed by differential microstrip lines. The designed broadband antennas are composed of two capacitively coupled rectangular stacked patches excited through a dog-bone shaped aperture by short-
Ignacio M. Delgado-Lozano   +4 more
doaj   +1 more source

Compact broadband high‐gain dielectric rod antenna with air–dielectric hybrid design for millimetre‐wave applications

open access: yesIET Microwaves, Antennas & Propagation
This paper presents a compact, broadband, high‐gain dielectric rod antenna. By utilising an air–dielectric hybrid method for designing the radiating and matching sections, gradual variations in the average equivalent permittivity along the rod are ...
Yuwei Zhang   +4 more
doaj   +1 more source

Compact circularly polarized metasurface antenna based on characteristic mode analysis

open access: yesElectronics Letters
This article introduces a novel, single‐layer, low‐profile, circularly polarized metasurface antenna. Through characteristic mode analysis, the optimization of a 3×3 rectangular metasurface structure was performed.
Qing Wang   +4 more
doaj   +1 more source

Broadband liquid antenna

open access: yesElectronics Letters, 2006
A new class of reconfigurable antenna based on monopole structures containing liquid dielectrics is presented. It was determined that the operating principle of this class of antenna is essentially that of a dielectric resonator, where salt (in solution) modifies the dielectric properties. The resonator column height determined the operating frequency,
H. Fayad, P. Record
openaire   +1 more source

Antenna arrays focused by broadband signals

open access: yesФизика волновых процессов и радиотехнические системы, 2015
Broadband and ultra-wideband signals are increasingly used in modern antenna technology, and various radio systems. Traditional performance evaluation antennas operating with narrow band signals are not always adequately reflect the characteristics of ...
Yu.E. Sedelnikov, D.A. Vedenkin
doaj  

Azimuth Null-Reduced Radiation Pattern, Ultralow Profile, Dual-Wideband and Low Passive Intermodulation Ceiling Mount Antenna for Long Term Evolution Application

open access: yesIEEE Access, 2019
An ultralow profile, dual-wideband and low passive intermodulation (PIM) in-building ceilingmount antenna for long term evolution (LTE) distributed antenna system (DAS) application is presented.
Kok Jiunn Ng   +4 more
doaj   +1 more source

High‐gain omnidirectional patch antenna for conformal application based on near‐zero‐index metamaterials

open access: yesIET Microwaves, Antennas & Propagation, 2021
Achieving a high‐gain omnidirectional patch antenna with low profile is a challenging task. On the basis of improving antennas by metamaterials, a broadband near‐zero‐index metamaterial (NZIM) is designed to enhance the horizontal gain of the ...
Tianqiang Zhang   +3 more
doaj   +1 more source

Design of a Highly Durable X-Band Array Antenna for Military Radar Systems [PDF]

open access: yesJournal of Electromagnetic Engineering and Science
In this paper, we propose a design technique for a highly durable X-band array antenna operating in the harsh maritime environment of military ships.
En-yeal Yim, Doyoung Jang, Hosung Choo
doaj   +1 more source

Design of Coplanar Wavequide Feeding Microstrip Antenna Design for Ultra-Wideband Applications

open access: yesGazi Üniversitesi Fen Bilimleri Dergisi, 2018
Due to the broadband requirements in the field of communication, broadband antennas are becoming popular nowadays. In recent years, both military and commercial applications have been reduced in size, but at the same time the need for broadband antennas ...
Mehmet Ali BELEN
doaj   +1 more source

Wideband patch antenna through introducing co‐plane terminal

open access: yesIET Microwaves, Antennas & Propagation
Wideband operation is a crucial topic in patch structure research. Various wideband methods have been developed for patch antennas. However, some of the key benefits of patch antennas, such as semi‐space radiation and easy fabrication, are degraded.
Boyu Sima   +7 more
doaj   +1 more source

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