Results 81 to 90 of about 85,808 (303)

Wideband Polarization Conversion Metasurface for RCS Reduction of Antennas

open access: yesInternational Journal of Antennas and Propagation, 2018
Polarization conversion metasurface (PCM) with wide operating band and high polarization conversion ratio is proposed for antenna radar cross-section (RCS) reduction.
Tao Hong   +4 more
doaj   +1 more source

Millimeter-wavelengths propagation studies Semiannaul status report [PDF]

open access: yes
Construction of two microwave band receiving antennas for ATS-E wavelength propagation ...

core   +1 more source

Microstrip Patch Antennas Fed by Substrate Integrated Waveguide [PDF]

open access: yes, 2013
Dizertační práce je zaměřena na výzkum mikropáskových flíčkových antén a anténních řad napájených vlnovodem integrovaným do substrátu (SIW). Využitím vlnovodu integrovaného do substrátu pro napájení mikropáskové flíčkové antény dochází ke kombinaci ...
Mikulášek, Tomáš
core  

A Comparison of Laser and Microwave Approaches to CW Beamed Energy Launch [PDF]

open access: yes, 2006
One approach to beamed energy propulsion uses a solid heat exchanger to absorb energy from a distant source and transfer it to a working fluid. Systems of this type can be designed using either microwave or laser sources.
Kare, Jordin T., Parkin, Kevin L. G.
core   +1 more source

A Tracer Diffusion Study of Diverse Photo‐Ionic Phenomena in Strontium Titanate

open access: yesAdvanced Functional Materials, EarlyView.
Two strong interfacial photo‐ionic effects are demonstrated for the model system SrTiO3 through the application of isotope exchange experiments: UV illumination is found to enhance the oxygen surface exchange coefficient by several orders of magnitude and to depress the surface space‐charge potential substantially.
David M. Schwenkel   +3 more
wiley   +1 more source

A Compact Broadband and Wide Beam Circularly Polarized Antenna With Shorted Vertical Plates

open access: yesIEEE Access, 2019
In this paper, a compact broadband and wide beam circularly polarized (CP) antenna are with novel vertical plate structure is proposed. The antenna is composed of two pairs of crossed dipoles, a slotted ground plane with four vertical right-angle plates ...
Guang Li, Fu-Shun Zhang
doaj   +1 more source

Integrated broadband bowtie antenna on transparent substrate

open access: yes, 2015
The bowtie antenna is a topic of growing interest in recent years. In this paper, we design, fabricate, and characterize a modified gold bowtie antenna integrated on a transparent glass substrate.
Chen, Ray T.   +7 more
core   +1 more source

Laser‐Induced Microfabrication of Carbon Nanostructure: Processing Mechanism and Application for Next‐Generation Battery Technology

open access: yesAdvanced Functional Materials, EarlyView.
The article reviews laser‐processed carbons from various precursors, processing mechanism and their application in advanced batteries. The laser process is chemical free, fast, and scalable, enabling improved battery performance and stability for Li, Na, and Zn battery technologies.
Sujit Deshmukh   +2 more
wiley   +1 more source

Features and technologies of ERS-1 (ESA) and X-SAR antennas [PDF]

open access: yes
Features and technologies of planar waveguide array antennas developed for spaceborne microwave sensors are described. Such antennas are made from carbon fiber reinforced plastic (CFRP) employing special manufacturing and metallization techniques to ...
Schuessler, R., Wagner, R.
core   +1 more source

Implementation and Investigation of a Compact Circular Wide Slot UWB Antenna with Dual Notched Band Characteristics using Stepped Impedance Resonators [PDF]

open access: yes, 2012
A coplanar waveguide (CPW) fed ultra-wideband (UWB) antenna with dual notched band characteristics is presented in this paper. The circular wide slot and circular radiation patch are utilized to broaden the impedance bandwidth of the UWB antenna.
Tao Jiang, Wenxing Li, Yingsong Li
core   +1 more source

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