Results 41 to 50 of about 93,179 (300)
Efficient Design Methodology for a Complex DRA-SIW Filter-Antenna Subsystem
International Journal of Antennas and Propagation, 2017 This work reports on an efficient design methodology for realizing hybrid filter-antenna subsystems. Designing a filter-antenna subsystem in the case of complex multimode filter is not straightforward.
Umair Naeem +3 more
doaj +1 more source
, 2011 Various techniques can be used to increase the gain of an antenna. For example, two or more uniformly distributed radiating elements can be used to create an antenna array. Array antennas have been successfully used for several years, but, unfortunately, they still suffer from a fundamental disadvantage: their feeding structure is inevitably more ...
Perron, Alexandre +2 more
openaire +3 more sources
Probe‐compensated fast hybrid antenna testing
IET Microwaves, Antennas & Propagation, 2017 Near‐field (NF) measurements with NF‐to‐far‐field (FF) transformation are a powerful and standard approach to modern antenna measurements. This approach implies a relatively close distance between device under test (DUT) and probe and, since the latter is rarely an ideal probe, it will introduce effects that have to be removed to obtain a FF which is ...
Giordanengo, Giorgio +4 more
openaire +2 more sources
Hybrid Analog and Digital Precoding: From Practical RF System Models to Information Theoretic Bounds
, 2016 Hybrid analog-digital precoding is a key millimeter wave access technology, where an antenna array with reduced number of radio frequency (RF) chains is used with an RF precoding matrix to increase antenna gain at a reasonable cost.
Krishnan, Rajet, Venkateswaran, Vijay
core +1 more source
Multiband hybrid loop-notch antennas
Loughborough Antennas & Propagation Conference (LAPC 2017), 2017 The study describes a small antenna with a hybrid loop‐notch configuration. This format has very small dimensions in terms of the operating wavelength and operation is possible over two or more non‐contiguous frequency bands. When integrated into a host circuit board it can be designed to maintain a substantially constant resonant frequency in the ...
openaire +1 more source
Evolutionary optimization of optical antennas
, 2012 The design of nano-antennas is so far mainly inspired by radio-frequency technology. However, material properties and experimental settings need to be reconsidered at optical frequencies, which entails the need for alternative optimal antenna designs ...
A. Taflove +7 more
core +1 more source
A dual-polarized quasi-optical SIS mixer at 550 GHz [PDF]
, 2000 In this paper, we describe the design, fabrication, and the performance of a low-noise dual-polarized quasi-optical superconductor-insulator-superconductor (SIS) mixer at 550 GHz.
Chattopadhyay, Goutam +3 more
core +1 more source
NKCC1: A key regulator of glioblastoma progression
Molecular Oncology, EarlyView.Glioblastoma (GBM) progression is driven by disrupted chloride cotransporter homeostasis. NKCC1 is highly expressed in stem‐like, astrocytic, and progenitor cells, correlating with earlier recurrence, while overall survival remains unaffected. NKCC1 serves as a prognostic marker and potential therapeutic target, linking chloride transporter imbalance ...
Anja Thomsen +5 more
wiley +1 more source
A Polarimetric Phased Array Antenna for E-SAR in L-Band [PDF]
, 2006 The design of a new L-band antenna for DLR’s airborne synthetic aperture radar system (E-/F-SAR) is presented. Beside operations in L-band new components for a system upgrade were developed. These components are intro-duced.
Bachmann, Markus +3 more
core
FEBS Open Bio, EarlyView.Chemoresistance in bladder cancer: Macrophage recruitment associated with CXCL1, CXCL5 and CXCL8 expression is characteristic of Gemcitabine/Cisplatin (Gem/Cis) Non‐Responder tumors (right side) while Responder tumors did not show substantial tumor‐stromal crosstalk (left side). All biological icons are attributed to Bioicons: carcinoma, cancerous‐cell‐
Sophie Leypold +11 more
wiley +1 more source