Results 81 to 90 of about 17,794 (219)

Monolithic optical integrated control circuitry for GaAs MMIC-based phased arrays [PDF]

Gallium arsenide (GaAs) monolithic microwave integrated circuits (MMIC's) show promise in phased-array antenna applications for future space communications systems.
Bhasin, K. B., Kascak, T. J., Ponchak, G. E.   +2 more
core   +1 more source

Miniaturized Resonator and Bandpass Filter for Silicon-Based Monolithic Microwave and Millimeter-Wave Integrated Circuits [PDF]

, 2018
© 2018 IEEE. © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.This paper introduces a unique approach for the implementation of a miniaturized on-chip resonator and its application for the first-order ...
Sun, Yichuang, Wong, Sai Wai, Yang, Yang, Zhu, He, Zhu, Xi   +4 more
core   +2 more sources

Estimation of heavy metals in agricultural soil using near-infrared spectroscopy with the improved evolutionary method

Frontiers in Environmental Science
IntroductionMonitoring and real-time detection of soil heavy metal pollution are crucial to ensuring the safety of agricultural food products. Conventional methods for determining heavy metal concentrations require substantial time and costs.
Shaoyong Hong, Siyuan Zhang, Miaoquan Lin, Fangxiu Meng, Can Hou, Huazhou Chen   +5 more
doaj   +1 more source

Monolithic microwave integrated circuit water vapor radiometer [PDF]

A proof of concept Monolithic Microwave Integrated Circuit (MMIC) Water Vapor Radiometer (WVR) is under development at the Jet Propulsion Laboratory (JPL).
Cooley, T. W., Janssen, M. A., Parks, G. S., Sukamto, L. M.   +3 more
core   +1 more source

Optical techniques to feed and control GaAs MMIC modules for phased array antenna applications [PDF]

A complex signal distribution system is required to feed and control GaAs monolithic microwave integrated circuits (MMICs) for phased array antenna applications above 20 GHz.
Anzic, G., Bhasin, K. B., Connolly, D. J., Kunath, R. R.   +3 more
core   +1 more source

Correlation between the reliability of HEMT devices and that of a combined oscillator-amplifier [PDF]

, 2001
We evaluate an oscillator-amplifier MMIC submitted to high-temperature operating life time tests. To relate adequately these results with individual components’ results, it is important to realise that failure mechanisms in non-linear MMICs are governed ...
Beyer, A., De Raedt, W., Nauwelaers, B., Neuhaus, B., Schreurs, D., Vandersmissen, R.   +5 more
core   +1 more source

Design of low-noise LDO power supply for RF LNA

Dianzi Jishu Yingyong, 2018
A power supply module is designed to supply RF low-noise amplifier(LNA) which is integrated in monolithic microwave integrated circuit(MMIC). The power supply module integrated in MMIC and uses a low dropout regulator(LDO) structure to produce a stable ...
Song Fei, Cai Jun, Li Yang, Wang Fei
doaj   +1 more source

Hybrid Integration of a Beam-Steering Leaky-Wave Antenna and Power Amplifier MMIC Using UPD Printing in 220 to 325 GHz Range

IEEE Open Journal of Antennas and Propagation
This paper presents the first hybrid-integration assembly of a power amplifier (PA) monolithic microwave integrated circuit (MMIC) and a beam-steering leaky wave antenna (LWA) using an ultra-precise deposition (UPD) printed coplanar waveguide (CPW ...
Georg Gramlich, Elizabeth Bekker, Luca Valenziano, Joel Dittmer, Martin Roemhild, Holger Baur, Fabian Thome, Axel Tessmann, Michael Kuri, Tom Neerfeld, Andreas Stohr, Sebastian Randel, Christian Koos, Norbert Fruehauf, Thomas Zwick, Akanksha Bhutani   +15 more
doaj   +1 more source

Ka-band MMIC beam steered transmitter array [PDF]

A 32-GHz six-element linear transmitter array utilizing monolithic microwave integrated circuit (MMIC) phase shifters and power amplifiers was designed and tested as part of the development of a spacecraft array feed for NASA deep-space communications ...
Duffy, L., Huang, J., Lubecke, V., Rascoe, D. L., Riley, A. L.   +4 more
core   +1 more source

Power HBT reliability for space applications [PDF]

, 2003
High power HBT process developed by UMS for X-band application have been space evaluated under CNES and ESA funding.The reliability assessment plan features high temperatures storage tests,DC life-tests,RF step test stress,ESD and radiation tests.A set ...
Auxemery, Ph., Blanck, H., Doser, W., Pataut, G.   +3 more
core   +1 more source