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Hirobumi Saito Lab.

Research Field

index2.png Saito laboratory have been engaging in researches on advanced small satellites. Students in Saito laboratory have chances to participate small satellite projects in order to deepen their understanding of satellite engineering. The three-axis attitude controlled small satellite REIMEI (see photos) with 70kg mass which have been developed mainly by Saito laboratory was launched in 2005 and is still functioning on orbit at present. The purposes of REIMEI satellite are demonstrations of new technologies of small satellites as well as aurora observations. REIMEI satellite has been operated dairy with the 3m antenna (photo) and operational room at our laboratory. Our activities are awarded as the technology prize of Japanese society of aeronautics and space engineering in 2009.
We are cooperating with the group of department of aeronautics and space engineering, Tokyo University to develop earth observation small satellites, which are scheduled to be launched in 2014.

Recent news

The 2015 IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC

Prilando Rizki Akbar (Project Researche):[X-BAND PARALLEL-PLATE SLOT ARRAY ANTENNA FOR SAR SENSOR ONBOARD 100 KG SMALL SATELLITE] July 19-25, 2015. Vancouver.

30th International Symposium on Space Technology and Science(ISTS)

Tomoya Fukami(Student):[Field Tests of 348 Mbps High Speed Downlink System for 50-kg Class Satellite] June 4-10, 2015. Hyogo Japan.

Microwave Symposium (IMS), 2015 IEEE MTT-S International

Vinay Ravindra(Student):[Cylindrical Cavity Microwave Power Combiner with Microstrip Line Inputs and Rectangular Waveguide Output] 17-22 May 2015. Phoenix.

10th IAA Symposium on Small Satellites for Earth Observation

Hirobumi Saito(Professor):[Compact X band Synthetic Aperture Radar on 100kg Small Satellite] April 20 - 24, 2015 Berlin, Germany.

10th IAA Symposium on Small Satellites for Earth Observation

Our laboratory achieved the world highest down link communication from 50 kg class satellite. We presented the result at 10th IAA Symposium on Small Satellites for Earth Observation on April 20-24, 2015,at Berlin. The attached is the presentation slides.


2013.6.5, Hiromi Wataqnabe "High-Efficiency X Band GaN PowerAmplifier for Small Satellite Downlink System"

29th ISTS

2013.6.5, Naohiko Iwakiri
"SCCC Turbo Equalizer/Decoder for X-band Nano Satellite High-Speed Downlink System"

2013.6.5, Tomoya Fukami "Development of high-speed and high-efficiency downlink transmitter with GaN-HEMT amplifier and pre-distortion technique for nano/small satellite"


2012.10.10-12  ISRA ICSANE 2012  Incyon, Korea, Watanabe Hiromi
“Developments of High-Efficiency GaN RF Amplifier and Pre-Distortion Technique for Nano/Small Satellite Downlink System”

Engineering Model of 320Mbps, 16QAM, X band transmitter is tested for 50 kg small satellit

The engineering model of 320Mbps, 16QAM, X band transmitter for Hodoyoshi-4 satellite is completed and tested at our laboratory and Addnics Corporation. Newly developed GaN-HEMT X band amplifier with high efficiency is applied there and the consumption DC power is reduced to only 18W. This low power consumption is amazingly small, compared with as large as 100W DC power of conventional transmitter for large satellites. (Oct 12, 2012)

Design of synthetic aperture radar for small satellite with 100kg mass.

We have started design of a small synthetic aperture radar for small satellite with 100kg mass, together with Chiba university. In order to minimize the radar antenna and the solar cell paddle, we will apply new technologies to microwave transmitters/receivers, transmission lines, antennas, onboard data processing devices, and power subsystem. (Oct. 12, 2012).