Results 11 to 20 of about 4,847,627 (305)

SPPs-Shared Dual-Band Antenna With Large Frequency Ratio

open access: yesIEEE Access, 2020
The operating frequency of future communication systems will cover both microwave and millimeter-wave (MMW) bands simultaneously. This paper presents a novel design of spoof surface plasmon polaritons (SPPs) structure-shared dual-band antenna with large ...
Jian-Xin Chen   +2 more
doaj   +1 more source

A low profile wideband broadside dual-mode compressed dipole antenna

open access: yesNantong Daxue xuebao. Ziran kexue ban, 2022
When the dipole works at the second mode, the current on the feed point which is located at the end of the dipole arm is zero. Thus, the second-order mode of a dipole has an extremely large input impedance and is difficult to realize impedance matching ...
DING Xinhao YANG Wenwen CHEN Jianxin
doaj   +1 more source

Resonance-Based Reflector and Its Application in Unidirectional Antenna with Low-Profile and Broadband Characteristics for Wireless Applications

open access: yesSensors, 2016
In this research, the novel concept of a resonance-based reflector (RBR) was proposed, and a ring-shaped RBR was utilized to design a unidirectional antenna with low-profile and broadband characteristics.
Lin Peng   +4 more
doaj   +1 more source

Low-Profile Slotted Metamaterial Antenna Based on Bi Slot Microstrip Patch for 5G Application

open access: yesSensors, 2020
A low-profile high-directivity, and double-negative (DNG) metamaterial-loaded antenna with a slotted patch is proposed for the 5G application. The radiated slotted arm as a V shape has been extended to provide a low-profile feature with a two-isometric ...
Ahasanul Hoque   +2 more
doaj   +1 more source

A Wideband Differential-Fed Dual-Polarized Microstrip Antenna Under Radiation of Dual Improved Odd-Order Resonant Modes

open access: yesIEEE Access, 2017
A low profile differential-fed dual-polarized microstrip patch antenna (MPA) with bandwidth enhancement is proposed under radiation of the first and second odd-order resonant modes.
Neng-Wu Liu   +3 more
doaj   +1 more source

A Low-Profile Transmissive Metasurface for Transformation of Plane Wave to Contour Beam Pattern Using 4-Arm Spiral Element

open access: yesIEEE Access, 2021
A low-profile transmissive metasurface is proposed to synthesize contour beam pattern for a European region. A slot array feed is used to illuminate same size metasurface aperture with a plane wave at a near field distance of 24 mm.
Abdul Aziz   +3 more
doaj   +1 more source

A Double-Layer Highly Efficient and Wideband Transmitarray Antenna

open access: yesIEEE Access, 2019
A double-layer highly efficient and wideband transmitarray antenna is presented. The transmitarray element is composed of four metal vias and two crosspatches with two stubs. The metal vias penetrate the entire substrate and arrange symmetrically.
Xiang-Jie Yi   +5 more
doaj   +1 more source

Design of Low Profile and Wideband End-Fire Antenna Using Metasurface

open access: yesIEEE Access, 2020
In this paper, a metasurfing (MS) concept is demonstrated and applied in the design of the low profile and wideband endfire antenna on metallic surface environments.
Ping Wang, Qi Wu, Rong-Bu He, Yu Shao
doaj   +1 more source

Gain and dispersion focusing in a high gain laser [PDF]

open access: yes, 1972
The transverse modes of a laser resonator containing a medium with a strong radial gain profile differ greatly from the modes of a similar resonator containing a low gain medium.
Casperson, Lee W., Yariv, Amnon
core   +2 more sources

Bandwidth-Enhanced Low-Profile Magneto-Electric Dipole Antenna With Shorting Parasitic Elements

open access: yesIEEE Access, 2021
This paper presents a low-profile magneto-electric (ME) dipole antenna with an enhanced impedance bandwidth realized by the loading of shorting parasitic elements.
Son Trinh-Van   +4 more
doaj   +1 more source

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