Search Results - "Seong-Pal Lee"
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Development of EQM (engineering qualified model) local oscillator for KA-band satellite transponder
Published in Microwave and optical technology letters (05-02-2004)“…A low‐phase‐noise engineering qualified model (EQM) local oscillator (LO) has been developed for a Ka‐band satellite transponder. A voltage controlled…”
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Journal Article -
2
Design of double-balanced MMIC mixer for Ka-band satellite communications
Published in Microwave and optical technology letters (20-09-2002)“…A MMIC (monolithic microwave integrated circuit) mixer chip using the Schottky diode of an InGaAs/GaAs p‐HEMT process has been developed to act as the receiver…”
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Journal Article -
3
Development of Ku-band Receiver/Downconverter for satellite transponders
Published in 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278) (2002)“…This paper presents the development of a Ku-band Receiver/Downconverter with the Noise figure of 1.83 dBmax and the conversion gain of 55 dB at the frequency…”
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Conference Proceeding Journal Article
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4
A low-phase-noise local oscillator for a Ka-band satellite transponder
Published in Microwave and optical technology letters (05-02-2003)“…A low‐phase‐noise local oscillator (LO) is developed for a Ka‐band satellite transponder. A novel dielectric resonator‐voltage controlled oscillator (DR‐VCO)…”
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Journal Article -
5
Verification of RF Performances of Ka-Band On-board Switching Transponder for COMS
Published in 2007 International Workshop on Satellite and Space Communications (01-09-2007)“…After the development of transponder equipment as flight model, a series of evaluation processes are performed to verify and identify them on system level if…”
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Conference Proceeding -
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COMMUNICATIONS SATELLITE SYSTEM BY USING MOON ORBIT SATELLITE CONSTELLATION
Published in Journal of astronomy and space sciences (01-12-2003)“…A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in…”
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Journal Article -
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A Study on operational stability trend and applied services over three years of COMS Ka band payload system
Published in 2013 International Conference on ICT Convergence (ICTC) (01-10-2013)“…Since COMS (Communication, Ocean and Meteorological Satellite) launched at 27 Jun. 2010, Ka-band Payload has shown an operational stability and applied on…”
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Conference Proceeding -
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Stability and application of COMS Ka band payload system
Published in 2012 International Conference on ICT Convergence (ICTC) (01-10-2012)“…Ka-band Payload of COMS (Communication, Ocean and Meteorological Satellite) has been operated and used for various purposes. The Ka band payload system,…”
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Conference Proceeding -
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Integration, testing and in orbit validation of Ka-band communication payload of COMS
Published in 2010 International Conference on Information and Communication Technology Convergence (ICTC) (01-11-2010)“…COMS (Communication, Ocean and Meteorological Satellite) named Chunrian is aimed to develop domestic space proven technology of Ka-band switching transponder…”
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Conference Proceeding -
10
A Proposal of the National Disaster Emergency Satellite Communications Networking
Published in 2008 10th International Conference on Advanced Communication Technology (01-02-2008)“…Recently, the necessity about the disaster emergency communication net build-up intensification emerges. Only the consequence in which relatively the…”
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Conference Proceeding -
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Utilization plans for Ka band Satellite Communications System using COMS
Published in 2010 The 12th International Conference on Advanced Communication Technology (ICACT) (01-02-2010)“…It is so difficult to communicate between satellite terminals by the distributed weak signal along with the beam size in case that the satellite beam covers…”
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Conference Proceeding -
12
Conceptual design of the Ka-band communication payload for communication, oceanographic, and meteorological satellite (COMS)
Published in The 6th International Conference on Advanced Communication Technology, 2004 (2004)“…A conceptual design feasibility study of the Ka-band communication payload for Satellite Communication (SATCOM) System that to be applied to the Communication,…”
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Conference Proceeding -
13
Design of the Network Control System for OBS Satellite Communications System
Published in 2006 8th International Conference Advanced Communication Technology (2006)“…The on-board switching (OBS) satellite system technology have started domestic development to overcome the limitation of the frequency resource and…”
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Conference Proceeding -
14
An enhanced PIN diode model for voltage-controlled PIN diode attenuator
Published in 33rd European Microwave Conference Proceedings (IEEE Cat. No.03EX723C) (2003)“…This paper presents an enhanced PIN diode model for the voltage-controlled PIN diode attenuator. The proposed model operates well when it is used in the…”
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Conference Proceeding -
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Voltage-Controlled Ku-Band PIN Diode Attenuator with a Temperature Compensation Circuit
Published in 2002 32nd European Microwave Conference (01-09-2002)“…This paper presents voltage-controlled Ku-band PIN diode attenuators and the temperature-compensation method of these attenuators. Measurements over…”
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Conference Proceeding -
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A Preliminary Design of Ka-band On-Board Switching Transponder for COMS
Published in 2005 Asia-Pacific Conference on Communications (2005)“…Satellite communication (SATCOM) system is to be applied in the communication, oceanographic, and meteorological satellite (COMS). ETRI has completed the…”
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Conference Proceeding -
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V-band MMIC low-noise amplifier design based on distributed active device model
Published in APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577) (2001)“…A V-band two stage MMIC low-noise amplifier using 0.15 /spl mu/m pHEMT based on a distributed active device model has been designed. This model is successful…”
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Conference Proceeding -
18
Error testing at planar near-field and far-field range of anechoic chamber
Published in 6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 (2003)“…Several error tests were mode at the elevated far-field antenna range of 8.6 meter distance between AUT and range antenna, and the planar near-field range of…”
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Conference Proceeding -
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A tuning method using a dummy cavity for dual-mode cavity filters
Published in Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) (2002)Get full text
Conference Proceeding -
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Coupling matrix of a 10 th ‐order dual‐mode asymmetric canonical filter
Published in Microwave and optical technology letters (05-07-2003)“…This paper deals with a simple method to extract the coupling matrix of a 10 th ‐order dual‐mode asymmetric canonical filter. The coupling matrix of an…”
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Journal Article