Results 71 to 80 of about 36,933 (358)

Phase control circuits using frequency multiplications for phased array antennas [PDF]

, 1973
A phase control coupling circuit for use with a phased array antenna is described. The coupling circuit includes a combining circuit which is coupled to a transmission line, a frequency multiplier circuit which is coupled to the combining circuit, and a ...
Caron, P. R., Mailloux, R. J.
core   +1 more source

Polarimetry With Phased Array Antennas: Theoretical Framework and Definitions [PDF]

, 2012
For phased array receivers, the accuracy with which the polarization state of a received signal can be measured depends on the antenna configuration, array calibration process, and beamforming algorithms.
Ivashina, Marianna, Maaskant, Rob, Warnick, K. F., Wijnholds, S. J.   +3 more
core   +1 more source

Angular Scan Enhancement of Ka-Band Circularly Polarized Phased Array Using Dielectric Dome

IEEE Access
This paper introduces a dielectric dome designed to enhance the angular scan of a circularly polarized phased array antenna at 29 GHz, while reducing broadside loss. The dome was created using a straightforward calculation-based approach. An $8\times 8$
Ebenezer Tawiah Ashong, Van Thang Nguyen, Jae-Young Chung   +2 more
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Численное исследование характеристик ФАР на основе печатных квази-Яги излучающих элементов [PDF]

, 2012
У роботі представлені результати чисельного дослідження методом скінченних різниць у часовій області характеристик узгодження і випромінювання квазі-Ягі антени і ФАР розміром 11х11 елементів, побудованої на основі таких випромінювачів.
Dubrovka, F. F., Vydalko, O. E., Видалко, О. Е., Видалко, О. Є., Дубровка, Ф. Ф., Дубровка, Ф. Ф.   +5 more
core  

Analysis of a Waveguide-Fed Metasurface Antenna [PDF]

, 2017
The metasurface concept has emerged as an advantageous reconfigurable antenna architecture for beam forming and wavefront shaping, with applications that include satellite and terrestrial communications, radar, imaging, and wireless power transfer.
Bowen, Patrick, Kundtz, Nathan B., Mancera, Laura Pulido, Smith, David R., Yurduseven, Okan   +4 more
core   +2 more sources

Biomimetic Iridescent Skin: Robust Prototissues Spontaneously Assembled from Photonic Protocells

Advanced Functional Materials, EarlyView.
Uniform nanoparticles are induced to form arrays (photonic crystals) in the cores of biopolymer capsules, endowing these ‘protocells’ with structural color. These protocells are then assembled into large self‐standing objects, i.e., prototissues, with robust mechanical properties as well as iridescent optical properties.
Medha Rath, Briahnah Streeter, Satyam Srivastava, Jemma Wood, William E. Bentley, Taylor J. Woehl, Srinivasa R. Raghavan   +6 more
wiley   +1 more source

Acousto-optic signal processors for transmission and reception of phased-array antenna signals [PDF]

, 1991
Novel acousto-optic processors for control and signal processing in phased-array antennas are presented. These processors can operate in both the antenna transmit and receive modes.
Psaltis, Demetri, Riza, Nabeel A.
core  

Dynamic Control of Synaptic Plasticity by Competing Ferroelectric and Trap‐Assisted Switching in IGZO Transistors with Al2O3/HfO2 Dielectrics

Advanced Functional Materials, EarlyView.
A frequency‐tunable ferroelectric synaptic transistor based on a buried‐gate InGaZnO channel and Al2O3/HfO2 dielectric stack exhibits linear and reversible weight updates using single‐polarity pulses. By switching between ferroelectric and trap‐assisted modes depending on input frequency, the device simplifies neuromorphic circuit design and achieves ...
Ojun Kwon, Dong Ho Lee, Seyoung Oh, Jongwon Yoon, Hyo‐Bae Kim, Ji‐Hoon Ahn, Woojin Park, Han Seul Kim, Byungjin Cho   +8 more
wiley   +1 more source

Implementation of Drug‐Induced Rhabdomyolysis and Acute Kidney Injury in Microphysiological System

Advanced Functional Materials, EarlyView.
A modular Muscle–Kidney proximal tubule‐on‐a‐chip integrates 3D skeletal muscle and renal proximal tubule tissues to model drug‐induced rhabdomyolysis and acute kidney injury. The coculture system enables dynamic tissue interaction, functional contraction monitoring, and quantification of nephrotoxicity, revealing drug side effect‐induced metabolic ...
Jaesang Kim, Zhuo Feng Lee, Gi‐Dong Sim, Sejoong Kim, Jessie S. Jeon   +4 more
wiley   +1 more source