Results 61 to 70 of about 1,181 (174)

A Fully Integrated 0.48 THz FMCW Radar Sensor in a SiGe Technology

IEEE Journal of Microwaves
The THz gap has been a significant research objective for photonics and electronics for decades. This work introduces a fully integrated frequency modulated continuous wave (FMCW) radar sensor with a center frequency of 0.48 THz, realized in a silicon ...
Florian Vogelsang, Jonathan Bott, David Starke, Marc Hamme, Benedikt Sievert, Holger Rucker, Nils Pohl   +6 more
doaj   +1 more source

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

Lymphadenopathy is an independent prognostic factor for patients with Waldenström macroglobulinaemia

British Journal of Haematology, Volume 207, Issue 4, Page 1589-1593, October 2025.
Ioannis Ntanasis‐Stathopoulos, Charalampos Filippatos, Despina Fotiou, Vassiliki Labropoulou, Nikolaos Giannakoulas, Emmanouil Spanoudakis, Sosanna Delimpasi, Magdalini Migkou, Panagiotis Malandrakis, Michalis Michael, Stavroula Giannouli, Evdoxia Hatjiharissi, Eirini Katodritou, Evangelos Terpos, Efstathios Kastritis, Meletios Athanasios Dimopoulos, Maria Gavriatopoulou   +16 more
wiley   +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

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

Ka-band GaAs pHEMT Wideband Power Amplifier MMICs

Известия высших учебных заведений России: Радиоэлектроника
Introduction. Ka-band power amplifier MMICs are essential components of many electronic systems. Their application area covers radar, 5G communication, and test equipment.
Alexander S. Efimov, Artem M. Emelianov, Evgeniya A. Krivonogova, Sergey D. Zinkin, Alexander V. Grusha   +4 more
doaj   +1 more source

A MMIC QPSK Modulator

Active and Passive Electronic Components, 2002
In this paper a MMIC QPSK modulator is described. The bit rate of the baseband signal is 155 Mbits/sec, while the frequency of the carrier is fLO=10 GHz . The modulation is performed directly at the RF band and therefore an IF stage is not necessary. The
Petros S. Tsenes, Giorgos E. Stratakos, S. Nikolaos, K. Uzunoglu   +3 more
doaj   +1 more source

X-Band MMIC Active Mixers

Active and Passive Electronic Components, 2002
In this paper two active MMIC mixers for RF front-end applications are described. A down-converter that converts an RF signal (fRF=10.45 GHz) into an IF signal (fIF=0.95 GHz) using an LO signal (fLO=9.5 GHz) and an up-converter that performs the ...
Ptros S. Tsenes, Giorgos E. Stratakos, Nikolaos K. Uzunoglu   +2 more
doaj   +1 more source

Analysis and Design of a GaAs Monolithic Tunable Polyphase Filter in S/C Bands

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper proposes a new topology of a 2-Stages Active Polyphase Filter (APPF) in MMIC GaAs technology. This new topology, named “radial”, allows a greater balancing of output signals phases and amplitudes, over the actual APPF’s at the state of the art.
Alberto Leggieri, Davide Passi, Daniele Gagliesi, Franco Di Paolo   +3 more
doaj   +1 more source

Design and Development of Monolithic Microwave Integrated Amplifiers and Coupling Circuits for Telecommunication Systems Applications

Active and Passive Electronic Components, 2002
Recent advances in printed circuit and packaging technology of microwave and millimeter wave circuits result to the increasing use of MMICs in telecommunication systems.
R. Makri, M. Gargalakos, N. K. Uzunoglu   +2 more
doaj   +1 more source