TECHNIQUES AND INSTRUMENTATION FOR PHASED ARRAY CALIBRATION [PDF]
, 2020 Active phased arrays suffer the inherent problem of excitation errors, i.e., incorrect phase and amplitude excitation of the antenna elements. Excitation errors degrade critical performance parameters since they increase sidelobe level and reduce antenna
Lebron Garcia, Rodrigo
core
Design and Optimization of Broadband Matching Networks for Widely Steerable Phased Array Radar Systems [PDF]
, 2022 The use of phased arrays have become prevalent in radar systems for military and weather applications due to their planar configuration and ability of electronic steering.
O'Connor-Lynch, Patrick
core
An Efficient Method for Performance Monitoring of Active Phased Array Antennas
, 2009 Modern synthetic aperture radars (SARs) are equipped with active phased array antennas to electronically generate various antenna beams. The TerraSAR-X satellite is a high resolution SAR system launched in June 2007.
Schwerdt, Marco +2 more
core +1 more source
Focusing Modeling of OPFC Linear Array Transducer by Using Distributed Point Source Method
Abstract and Applied Analysis, 2014 The improvement of ultrasonic phased array detection technology is a major concern of engineering community. Orthotropic piezoelectric fiber composite (OPFC) can be constructed to multielement linear array which may be applied conveniently to actuators ...
Ziping Wang, Ying Luo
doaj +1 more source
Digital Predistortion Utilizing Over-the-Air Feedback for Phased Arrays
IEEE Access, 2021 In this paper, an efficient digital predistortion (DPD) architecture utilizing over-the-air (OTA) feedback is presented to linearize phased array transmitters.
Ying Liu +5 more
doaj +1 more source
The Warm Receiver Section and the Digital Backend of the PHAROS2 Phased Array Feed [PDF]
, 2019 We describe the development of a multi-channel “warm receiver section” (WS) and of a digital beamformer for the PHAROS2 Phased Array Feed (PAF), a PAF demonstrator for radio astronomy application across the 4-8 GHz radio frequency (RF) band.
PUPILLO, Giuseppe +29 more
core +1 more source
GESTRA - a phased-array based surveillance and tracking radar for space situational awareness
, 2022 S.483-487Space debris is an ongoing and growing problem for space-based infrastructure. The rising population of man-made debris particles has the potential to destroy operational satellites and spacecrafts. In order to avoid the risk of collisions it is
Ben Bekhti, N. +5 more
core +1 more source
Multi-Antenna Phased Array Radar-Guided Search Resource Optimization Algorithm Based on MADDPG [PDF]
Jisuanji gongchengAn optimization algorithm for multi-antenna phased array radar search parameters based on the Multi-Agent Deep Deterministic Policy Gradient (MADDPG) is proposed to address the problem that search parameters of the traditional single-antenna phased array
WANG Teng, HUANG Junsong, WANG Leting, ZHANG Caikun, LI Xiaoyang
doaj +1 more source
24 GHz LNA and Vector Modulator Phase Shifter for Phased-Array Receiver in CMOS Technology [PDF]
, 2013 With the rapid development of the applications in short range communication, phased-array receiver working at 24 GHz can provide enhanced gain performance at desired transmission direction. Also there is the wide signal bandwidth, i.e.
Pierre-Andre Farine +7 more
core +1 more source
The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome
FEBS Letters, EarlyView.This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley +1 more source