Results 81 to 90 of about 36,933 (358)

A phased array tracking antenna for vehicles [PDF]

An antenna system including antenna elements and a satellite tracking method is considered a key technology in implementing land mobile satellite communications.
Mano, Kazukiko, Matsunaga, Makoto, Ohmori, Shingo, Tanaka, Kenji, Tsuchiya, Makio   +4 more
core   +1 more source

28 GHz mmWave Channel Measurements: A Comparison of Horn and Phased Array Antennas and Coverage Enhancement Using Passive and Active Repeaters [PDF]

, 2020
Özgür Özdemir, Fatih Erden, İsmail Güvenç, Taha Yekan, Tom Zarian   +4 more
openalex   +1 more source

Nonreciprocal-Beam Phased-Array Antennas

, 2020
This study presents a nonreciprocal-beam phased-array antenna constituted of phase-gradient patch radiators integrated with transistor-based nonreciprocal phase shifters. Such an antenna exhibits different beams for transmission and reception states.
Karimian, Reza, Ahmadi, Shahrokh, Zaghloul, Mona, Taravati, Sajjad   +3 more
openaire   +2 more sources

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source

Optical control of an 8-element Ka-band phased array using a high-speed optoelectronic interconnect [PDF]

Optical distribution of control signals in electronically steered phased array antennas is being considered. A demonstration experiment is described in which a high speed hybrid GaAs optoelectronic integrated circuit (OEIC) was used to control an eight ...
Bendett, M., Bhasin, K. B., Claspy, P. C., Richard, M. A.   +3 more
core   +1 more source

Phased-array antenna phase control circuit using frequency multiplication [PDF]

, 1975
Circuit separates out, from multiplied signals, antenna element signals which have desirable phase angles and feeds them to appropriate antenna elements of phased array.
Caron, P. R., Mailloux, R. J.
core   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Ka-band feed arrays for spacecraft reflector antennas with limited scan capability: An overview [PDF]

, 1992
JPL and NASA are in the process of developing ground and spacecraft antenna systems at Ka-band frequencies for future deep space applications. The use of Ka-band (32-GHz down) communication will result in smaller ground and spacecraft antennas and ...
Jamnejad, V.
core   +1 more source

EFFECT OF THE GROUND PARAMETER VARIATIONS ON THE SENSITIVITY OF AN ACTIVE PHASED ARRAY ANTENNA ELEMENT OF THE LOW-FREQUENCY GURT RADIO TELESCOPE

Radio Physics and Radio Astronomy, 2019
Purpose: Theoretical studies of sensitivity fluctuations of a phased array antenna element for the GURT radio telescope of the new generation caused by seasonal changes of the ground parameters. Design/methodology/approach: A mathematical model of an
P. L. Tokarsky, A. A. Konovalenko, N. N. Kalinichenko, S. N. Yerin   +3 more
doaj   +1 more source

Optimization of thermal regimes of microwave resonators digital active phased array antenna

, 2022
Kh. M. Gadzhiev, А. А. Akimov, E. A. Abdurafikov, R. Sh. Asaliev, А. М. Магомедов   +4 more
openalex   +2 more sources