Results 81 to 90 of about 25,376 (311)

Development of Wideband High‐Selective Circularly Polarised Antenna Based on Filtering Quadrature Phase Feeding Network

IET Microwaves, Antennas & Propagation
This paper presents a new design of circularly polarised (CP) antenna with wideband and high gain selectivity. To achieve good circular polarisation performance, a wideband quadrature phase feeding network is initially developed with two output signals ...
Zhipeng Xia, Qing‐Yuan Lu, Shangjun Jiang, Jianpeng Wang, Wen Wu, Yongxin Guo   +5 more
doaj   +1 more source

Compact and Highly Isolated Continuous Scanning Dual-Polarized Holographic Antenna Using a Pillbox Feeding Structure

Applied Sciences
In this paper, we propose a novel approach to realize a compact and highly isolated dual-polarized holographic antenna using a pillbox feeding structure.
Chan Yeong Park, Ick-Jae Yoon, Young Joong Yoon   +2 more
doaj   +1 more source

A 3D Biofabricated Disease Model Mimicking the Brain Extracellular Matrix Suitable to Characterize Intrinsic Neuronal Network Alterations in the Presence of a Breast Tumor Disseminated to the Brain

Advanced Functional Materials, EarlyView.
A 3D disease model is developed using customized hyaluronic‐acid‐based hydrogels supplemented with extracellular matrix (ECM) proteins resembling brain ECM properties. Neurons, astrocytes, and tumor cells are used to mimic the native brain surrounding.
Esra Türker, Mateo S. Andrade Mier, Jessica Faber, Mike Friedrich, Zan Lamberger, Jeannette Weigelt, Christian Stigloher, Nicoletta Murenu, Natascha Schaefer, Jörg Tessmar, Gregor Lang, Silvia Budday, Katrin G. Heinze, Antje Appelt‐Menzel, Pamela L. Strissel, Reiner Strick, Carmen Villmann   +16 more
wiley   +1 more source

A new impedance matching method for an ultra-wide band and dual circularly polarised feed [PDF]

, 2016
In traditional antenna design, metal components are not placed in the central part of the antenna as they change the characteristics of near field radiation.
Chen, Zhi Jun, Jeffrey, Natasha, Li, Sha, Liu, Dong Hao, Wang, Wei, Yan, Yi Hua, Zhang, Fu Shun   +6 more
core   +1 more source

Near‐Infrared Organic Photovoltaic Electrodes for Subretinal Neurostimulation

Advanced Functional Materials, EarlyView.
Organic photovoltaic electrodes based on the D18:Y6 blend enable precise and light‐controlled activation of retinal ganglion cells in a degenerating retina. NIR Light‐driven activation of retinal ganglion cells, tunable stimulation parameters, and biocompatibility with human retinal organoids highlight their potential for next‐generation prosthetics ...
Andrea Corna, Katarina Gugujonovic, Manuela Schiek, Alessandro Bellapianta, Paul Werginz, Amelie Ziller, Markus Clark Scharber, Ahmad Salti, Matthias Bolz, Mihai Irimia‐Vladu, Günther Zeck   +10 more
wiley   +1 more source

Broadband feed antenna design

, 2012
This thesis describes the development of a log-periodic waveguide feed antenna from concept to design and finally to prototyping and testing. An electromagnetic simulator (CST) was used to evaluate different design concepts and a design based on a nested coaxial waveguide structure was selected.
openaire   +1 more source

Dual-polarized feed antenna apparatus and method of use [PDF]

, 2008
An antenna apparatus and method for the interception of randomly polarized electromagnetic waves utilizing a dual polarized antenna which is excited through a cross-slot aperture using two well-isolated orthogonal ...
Buckle, Kenneth A., Goswami, D. Yogi, Sarehraz, Mohammed, Stefanakos, Elias, Weller, Thomas   +4 more
core   +3 more sources

CMB Telescopes and Optical Systems

, 2012
The cosmic microwave background radiation (CMB) is now firmly established as a fundamental and essential probe of the geometry, constituents, and birth of the Universe. The CMB is a potent observable because it can be measured with precision and accuracy.
A Kogut, A Kogut, A Kogut, A Oliveira-Costa de, A Oliveira-Costa de, A Olver, AA Klypin, ACS Readhead, AD Miller, AN Lasenby, APS Yadav, AR Levy, B Rabii, BG Keating, BG Keating, BP Crill, BR Johnson, BT Draine, BT Draine, C Barnes, C Dragone, C Dragone, C Dragone, C Dragone, C O’Sullivan, C O’Sullivan, CC Finlay, CL Bennett, CL Kuo, D Barkats, D Hanson, D Korsch, D O’Dea, DC Alsop, DJ Fixsen, DJ Fixsen, DS Swetz, DT Wilkinson, E Hecht, E Komatsu, E Pascale, E Shirokoff, EE Epstein, EJ Wollack, EK Conklin, EK Conklin, EM Leitch, EM Leitch, ES Cheng, ES Cheng, ES Seo, G Hinshaw, G Smoot, GA Seielstad, GF Smoot, GF Smoot, GP Nanos Jr, GS Tucker, H Tran, H Tran, HC Chiang, IA Strukov, IA Strukov, IA Strukov, J Singal, J Staren, J Zmuidzinas, JB Peterson, JC Baker, JC Mather, JE Carlstrom, JE Knoke, JE Ledden, JM Kovac, JM Lamarre, JM Uson, JR Bond, JR Hinderks, JR Pardo, JW Fowler, JW Fowler, JW Fowler, K Ganga, K Grainge, K Irwin, KK Schaffer, KS Stankevich, KW Brown, L Page, L Piccirillo, L Piccirillo, L Piccirillo, L Rudnick, LA Page, LA Page, Love, A., Antennas, I., & Society, P, M Dragovan, M Halpern, M Kamionkowski, M Shimon, M Su, M Tegmark, M Tegmark, M Zaldarriaga, MA Toral, MD Niemack, MJ Griffin, MM Hedman, N Caderni, N Jarosik, N Jarosik, N Mandolesi, NW Boggess, NW Halverson, OP Lay, P Ade, P Bernardis de, P Bernardis de, P Clarricoats, P Meinhold, PC Farese, PF Scott, PJE Peebles, PJE Peebles, PL Richards, PM Lubin, PR Meinhold, PR Meinhold, PS Henry, PT Timbie, PT Timbie, PT Timbie, R Fabbri, R Fabbri, R Keisler, R O’Brient, R Weiss, RA Sunyaev, RB Partridge, RB Partridge, RD Davies, RL Carpenter, RS Hill, RW Wilson, S Basak, S Chang, S Chang, S Das, S Hanany, S Hanany, S Hanany, S Padin, S Padin, SE Church, SP Boughn, SP Boughn, SR Dicker, SS Meyer, T Gaier, T Gaier, TheQubic Collaboration, TJ Pearson, VI Tatarskii, W Hu, W Welton, WA Imbriale, Y Ali-Haïmoud, Y Mizuguchi, Y Mizugutch, YD Takahashi, YN Pariiskii, YN Parijskij, Z Staniszewski   +172 more
core   +1 more source

Field and Temperature Gradients from Short Conductors in a Dissipative Medium

International Journal of Antennas and Propagation, 2007
This paper considers the specific absorption rate (SAR) in tissue of radiofrequency (RF) energy and temperature increases produced by RF currents on short conductors (0.03–0.1λ).
Quirino Balzano, Kenneth R. Foster, Asher R. Sheppard   +2 more
doaj   +1 more source

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

Advanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid, Demeng Feng, Pournima Narayanan, Justin S. Edwards, Manchen Hu, Emma Belliveau, Minjeong Kim, Shenwei Yin, Sanket Deshpande, Chenghao Wan, Linda Pucurimay, David A. Czaplewski, Daniel N. Congreve, Mikhail A. Kats   +13 more
wiley   +1 more source