Results 11 to 20 of about 1,308 (208)

Power Control in Passive Waveguide Circuits [PDF]

, 2006
A new concept of a passive waveguide reflection attenuator and a T-junction with a variable ratio of the output powers is reported here. A conductive uniform linear polarization grid of nano thickness is inserted into the standard rectangular waveguide ...
Macháč, Jan, Zabloudil, Pavel, Zehentner, Ján   +2 more
core   +1 more source

Investigation and Implementation of Miniaturized Microwave System for Linear Array Antenna Loaded With Omega Structures Planar Array

IEEE Access
This paper investigates and implements a miniaturized microwave system for microstrip linear array antenna that operates in X-band (10.1 GHz), S-band (3.4 GHz) and C-band (5.6 GHz).
Ahmed F. Miligy, Fatma Taher, Mohamed Fathy Abo Sree, Sara Yehia Abdel Fatah, Thamer Alghamdi, Moath Alathbah   +5 more
doaj   +1 more source

Development of a microwave low-pass filter based on a microstrip line projection mode

Российский технологический журнал
Objectives. Sections of microstrip lines having finite length are widely used to develop integrated circuits and microwave devices for various purposes, such as power dividers, directional couplers, attenuators, and filters.
A. D. Yarlykov, O. A. Demin
doaj   +1 more source

Low-Profile Dual Circularly Polarized Antenna Array for Satellite Communications in the X Band [PDF]

, 2011
A planar antenna is introduced that works as a portable system for X-band satellite communications. This antenna is low-profile and modular with dimensions of 40 × 40 × 2.5 × cm. It is composed of a square array of 144 printed circuit elements that cover
Fernández González, José Manuel, García Aguilar, Andrés, Inclán Alonso, José Manuel, Sierra Pérez, Manuel, Vigil Herrero, Lucía   +4 more
core   +2 more sources

Wavelength flattened directional couplers for mirrorsymmetric interferometers

, 2005
In the context of guided optics, we derive, analytically and geometrically, a rigorous general criterion to design wavelength insensitive interferometers with mirror symmetry, which are needed for wavelength multiplexing/demultiplexing.
Cherchi, Matteo, Tormen, Maurizio
core   +1 more source

Microwave planar circuits design and fabrication [PDF]

, 2012
Tato bakalářská práce je orientována na problematiku planárních mikrovlnných obvodů, konkrétně směrových odbočnic a mikrovlnných děličů výkonu. Jsou v ní zmíněny mikrovlnné obvody, poté jsou podrobněji rozebrány směrové odbočnice a mikrovlnné děliče ...
Šamořil, Lukáš
core  

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

Displays and Photonics Application Group activities [PDF]

, 2004
Displays and Photonics Application Group (GDAF) is devoted to design and development of passive and active devices and sensors for their applications in WDM networks, CWDM, POP, and RF over fiber networks using different technologies such as optical ...
Aranda, Ángel Luis, Gonzalo, Ana B., Manzanares Bolea, Rodrigo, Montalvo García, Julio, Pérez, Isabel, Santos, José Luis, Sánchez-Pena, José Manuel, Urruchi del Pozo, Virginia, Vargas Palma, Salvador Elías, Vergaz Benito, Ricardo, Vázquez García, María Carmen   +10 more
core   +2 more sources

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

Molecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson, Lyanne Delgado‐Coka, Natalia Marchenko, Luisa F. Escobar‐Hoyos, Kenneth R. Shroyer, Alisa Yurovsky, Trey Ideker, Gábor Balázsi, Thomas MacCarthy, Scott Powers   +9 more
wiley   +1 more source

Microwave Slow-Wave Structure and Phase-Compensation Technique for Microwave Power Divider [PDF]

, 2014
In this paper, T-shaped electromagnetic bandgap is loaded on a coupled transmission line itself and its electric performance is studied. Results show that microwave slow-wave effect can be enhanced and therefore, size reduction of a transmission-line ...
Gao, S. S., Li, J. L., Shao, W., Wang, J. P., Yang, X. S.   +4 more
core   +1 more source