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National Space Development Agency of Japan Patents
Assignee:
National Space Development Agency of Japan
Address:
Ibaraki, JP
No. of patents:
44
Patents:












Patent Number Title Of Patent Date Issued
6885063 Semiconductor device having an SEB voltage suitable for use in space April 26, 2005
In a power MOSFET, on an N.sup.+ drain layer 21 as a substrate, a second N base layer 3 and a first N.sup.- base layer 22 are deposited in the order by epitaxial growth. In a surface portion of the layer 22, there are selectively formed a P base region 23, in a surface portion of which a
6736609 Support apparatus for movable member and pump apparatus May 18, 2004
A pump apparatus of simple construction has a bearing structure for which a lubricant is unnecessary. A flow passage for a refrigerant (liquid ammonia) is formed in a housing to provide communication between a suction port and a discharge port, and slide bearing members formed of amorpho
6710352 Charged particle measuring apparatus March 23, 2004
A charged particle measuring apparatus discriminates the types of charged particles accurately and the energy precisely, measures high-energy charged particles precisely, and detects a failure of the apparatus to continue measurement in a mode corresponding to the failure. Outputs from
6615609 Accumulator September 9, 2003
The present invention provides an accumulator 21 for evaporating and condensing a refrigerant in a pressure vessel 22 thereof to control pressure or the like in a closed-loop type controlled unit. The accumulator comprises liquid-phase refrigerant holding means 23 for holding the ref
6581452 Apparatus for measuring volume under microgravity June 24, 2003
Volume measuring apparatus is used in a closed space as in the case of volume measurement of liquid in a container placed on an orbit of an artificial satellite and permits the volume measurement in a state without mixture with gas, liquid, or solid. A volume measuring apparatus is an
6494406 Rocket fairing and method of opening the same December 17, 2002
A rocket fairing mounted on a forward section of a rocket body included in a rocket comprises a first structure formed on the fairing-base side, and including a first side wall defining a first storage space for storing a first payload; and a second structure formed on the fairing-forwar
6392594 Radio wave receiving apparatus having an improved antenna resolution May 21, 2002
Provided herein is a radio wave receiving apparatus including a signal processing circuit comprising: a means for the Fourier transform in respect of azimuth of an electric field signal outputted from an antenna receiving circuit; a means for the Fourier transform in respect of azimuth
6353498 All optical inverter/amplifier March 5, 2002
The present invention provides an optical function device which is capable of inverting and amplifying an optical signal of the optical communication wavelength band, and executing operation of an image optical signal, and is operable in a wide temperature range, said optical function de
6259397 Radio wave source information display apparatus July 10, 2001
A radio wave source information display apparatus including: a signal processing circuit having a means for performing the Fourier transform with respect to azimuth of an electric field signal outputted from an antenna receiving circuit, a means for performing the Fourier transform w
6163293 Radio wave receiving apparatus having an improved antenna resolution December 19, 2000
A radio wave receiving apparatus including having improved antenna resolution. The apparatus includes a signal processing circuit; a circuit for performing the Fourier transform with respect to an azimuth of an electric field signal outputted from an antenna receiving circuit; a circ
6133997 System for spotting moving objects based on a plurality of artificial satellites October 17, 2000
A system for spotting moving objects based on a plurality of artificial satellites including: a step of taking images at the same point in time by using imaging devices respectively mounted on at least two units of artificial satellites located separately from one another of which the
6082677 Satellite orbiting toward west in the equatorial plane and meteorological satellite system using July 4, 2000
Achieved herein is a satellite capable of readily obtaining in a short time span a continuous image of the whole earth by a single unit of the satellite alone, the westward equatorial satellite being an artificial satellite having thereon an image pickup means for picking up an image of
5852420 Antenna device December 22, 1998
An antenna system is made up by a main antenna and a sub antenna which is adjacent the main antenna in a direction not perpendicular to the direction of beam scan of the main antenna and which has a beam axis coincident with a beam axis of the main antenna. Antenna beams of the anten
5756891 Verification method of a flight control system using a transportable wind tunnel May 26, 1998
A transportable three-dimensional calibration wind tunnel system consisting of a small wind tunnel portion for creating a three-dimensional airflow having a suitable wind velocity, and a two-axis rotational deformation device portion for causing the wind tunnel portion to effect a conica
5627311 Transportable three-dimensional calibration wind tunnel system, verification method of flight co May 6, 1997
A transportable three-dimensional calibration wind tunnel system consists of a small wind tunnel portion for creating a three-dimensional airflow having a suitable wind velocity, and a two-axis rotational deformation device portion for causing the wind tunnel portion to effect a conical
5548290 Method of designing transmission power in synthetic aperture radar August 20, 1996
In a method of designing the transmission power of a synthetic aperture radar installed on a flight object such as an artificial satellite, the transmission power is designed such that, in applying radar equation P.sub.r =P.sub.t .multidot..sigma..multidot.A.sub.p.sup.2 /(4.pi..lambd
5512899 Method of evaluating the image quality of a synthetic aperture radar April 30, 1996
An active reflector including an antenna, a frequency converter, and a delay circuit is placed at a location within an area to be detected by a synthetic aperture radar. The active reflector receives an incoming radio wave emitted by the synthetic aperture radar and changes its frequency
5485162 Method of performing beam compression process on antenna pattern of radar January 16, 1996
An antenna system comprising two similar antennas with a monopulse feed system is scanned while transmitting in-phase radio waves from the two antennas. Reflected radio waves are received by the two antennas and fed to a hybrid circuit which in turn produces a sum signal .SIGMA. and a
5476063 Method of production of single crystal December 19, 1995
A seed crystal is connected with a polycrystal at one end of the polycrystal, the connected crystal material is melted under a zero-gravity or microgravity environment without any container, and a single crystal is grown.
5448247 Beam compression method for radar antenna patterns September 5, 1995
An antenna system is formed by arranging a sub-antenna adjacent to a main antenna along the direction of the beam width to be reduced of the main antenna and in such a way that the beam axis of the sub-antenna is coincident with that of the main antenna. The antenna beam of this antenna
5432519 Method of performing beam compression process on antenna pattern of radar July 11, 1995
An antenna system comprising two similar radiation antenna elements with a single monopulse feed system is scanned while transmitting in-phase radio waves from the two elements. Reflected radio waves are received by the two elements and fed to a hybrid circuit which in turn produces a su
5430451 Array antenna mounted on spacecrafts July 4, 1995
An array antenna mounted on a spacecraft in its stowed state. After the spacecraft is launched in a predetermined position or on a predetermined orbit, the array antenna is extended to a flat plate form or a curved surface form. The array antenna has a structure that a plurality of s
5423287 Crystal growing cell June 13, 1995
Crystal growing cell including first and second casings. The first casing has a first solution chamber for containing a first solution therein. The first solution chamber has an opening. The second casing has a closing member placed therein for movement in a first direction and in a seco
5422637 Method of performing beam compression process on antenna pattern of radar June 6, 1995
An antenna system comprises a main antenna for use of transmission and reception and a dedicated sub-antenna for use of reception. The antenna beam of the antenna system is scanned in the direction of a beam width to be compressed. Both received signals of the main antenna and the su
5418539 Method of performing beam compression process on antenna pattern of radar May 23, 1995
An antenna system comprises a main antenna for use of transmission and reception and a pair of sub-antennas use of only reception. The antenna beam of the system is scanned in the direction of a beam width to be compressed. Both received signals of the main antenna and the sub-antennas
5345246 Antenna device having low side-lobe characteristics September 6, 1994
There is disclosed an antenna device having low side-lobe characteristics comprising a pair of array antennas having the same construction. Each array antenna has array elements equidistantly arranged. The center-to-center distance between the array antennas is so determined that the
5296864 Beam compression process for antenna pattern March 22, 1994
An antenna system including a sub antenna adjacent a main antenna in the direction where a beam width of the main antenna is to be compressed and a beam axis of the sub antenna is coincident with a beam axis of the main antenna. Antenna beams of the antenna system are scanned in the dire
5283588 Monopulse tracking apparatus February 1, 1994
A monopulse tracking apparatus comprises first to fourth electromagnetic horns disposed symmetrically to each other in an azimuthal direction and elevation direction in a 2.times.2 matrix state, a first hybrid circuit for creating the sum signal and difference signal of the first and sec
5268697 Processing method for antenna pattern December 7, 1993
After each received signal in the same two antennas of the monopulse power feed system are inputted into a hybrid circuit, a sum signal .SIGMA. and a difference signal .DELTA. are formed, and they are demodulated in detection circuits, zero is outputted if the value of the sum signal
5252983 Method for reducing side lobes in antenna patterns October 12, 1993
A method for reducing side lobes wherein an antenna system comprises a main antenna and a sub antenna which does not have an isotropic antenna pattern in a direction (X direction) of an orientation of a side lobe of the main antenna to be reduced which is arranged in such a way that the
5249055 Solid-state imaging apparatus including external charge input terminal September 28, 1993
A solid-state imaging device includes a plurality of light receiving elements, transfer gates for controlling reading-out of signal charges generated by the light receiving elements, a charge coupled device for transferring the signal charges from the light receiving elements through
5248984 Method for processing an antenna pattern September 28, 1993
A method for processing an antenna pattern in which a first antenna system is placed to correspond with a first direction in relation to the beam width to be compressed, a second antenna system of the monopulse power feed system is placed to correspond with a second direction lying at a
5243352 Method for processing antenna patterns September 7, 1993
An antenna system comprises: a main antenna; a first sub antenna arranged in such a way that the first sub antenna adjoins the main antenna in the X direction which is the orientation of a beam width of the main antenna to be reduced and the beam axis of the first sub antenna coincides w
5194869 Ranging method using telemetering and apparatus employing said method March 16, 1993
A ranging method for measuring the flight distance of a flight object is implemented by means of a simple system construction. The ranging method is also capable of continuing ranging even if an interruption occurs in data transmission. The ranging method comprises the steps of inserting
5193766 Retry/recovery method in rendezvous maneuver March 16, 1993
In a rendezvous maneuver for approaching a rendezvous spacecraft to a target spacecraft through a reference trajectory for approach which is different in altitude and period from a trajectory of the target spacecraft, when the rendezvous spacecraft is deviated from the reference traj
5155651 Levitator with rotation control October 13, 1992
A levitator which is mounted on a space station; for example, for use in material science experiments in space. The levitator has a position detector for detecting the position of a sample, a variable power supply whose output voltage varies in accordance with the signal output from the
5081381 Electromagnetic actuator with linear control January 14, 1992
An electromagnetic actuator includes a cylindrical rod made of a magnetic substance and having a large number of annular teeth formed on an outer surface thereof at a fixed pitch, and a plurality of annular electromagnets fitted on the cylinder rod. The intervals of the annular elect
5049741 Electromagnetic wave shielding system for optical sensor having an aperture September 17, 1991
An electromagnetic wave shielding system for an optical sensor includes: a sensor body having an aperture through which an optical signal is made incident on the sensor body; a shielding plate disposed within the sensor body, the shielding plate having an opening having a dimension of at
4978962 Electrically scanning microwave radiometer December 18, 1990
An electrically scanning microwave radiometer for measuring the brightness temperature of an object by performing a conical scan of the object. The microwave radiometer comprises a torus-type reflector and an array of radiators. The radiators are grouped to form a plurality of subarrays.
4972245 Infrared detecting element November 20, 1990
An intermediate layer made of an Si.sub.1-X Ge.sub.X mixed crystal layer is formed on an Si crystal substrate, where the character X denotes a value in the range of 0 to 1. The intermediate layer is connected to the substrate via a heterojunction generating a first heterojunction barrier
4955654 End effector September 11, 1990
An end effector secured to an front end of a manipulator of a remote manipulator system and having a function for clamping dedicated objects, wherein a force (or torque) applied to the end effector at the time of clamping the dedicated object is detected so that a driving portion of the
4946349 Water ring vacuum pump August 7, 1990
A pumping system comprising a liquid ring vacuum pump including a casing and a rotatable runner. A Pitot pump including a casing, a Pitot tube, an impeller and a drum, the impeller and the drum being rotatably mounted in the casing, and the Pitot tube being mounted within the casing adja
4939561 Infrared sensor July 3, 1990
An infrared sensor includes a metal and a semiconductor contacted to each other via a rectifying potential barrier. The semiconductor includes a p-type strained Si.sub.1-X Ge.sub.X epitaxial layer grown on a p-type substrate, wherein the character X denotes a Ge atomic fraction and w
4879874 Liquid fuel rocket engine November 14, 1989
The present invention is related to a liquid fuel rocket engine of the type that a liquid fuel is boosted in pressure by way of a booster means. Thus boosted liquid fuel is gasified with a fuel cooling jacket of a fuel combustor means with an expansion pressure of thus gasified fuel bein

 
 
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