Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Sezai; Toshihiro
Address:
Tokyo, JP
No. of patents:
16
Patents:












Patent Number Title Of Patent Date Issued
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
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
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
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
5296863 Beam compression process for antenna pattern March 22, 1994
A beam of a main antenna is scanned at a constant speed in the direction of compression of the beam width over the range of from (c-a) degree to (c+a) degree with an arbitrary angle c set as a reference angle, and a beam of a sub antenna is scanned by using a phase shifter at a constant
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
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










 
 
  Recently Added Patents
Solid-state imaging device, method for manufacturing solid-state imaging device, and electronic apparatus
Method of manufacturing a plurality of electronic assemblies
Radio transmitter and radio receiver with channel condition assessment
Composite high reflectivity layer
Method and apparatus for filter-less class D audio amplifier EMI reduction
Faucet
Satellite fleet deployment
  Randomly Featured Patents
Slotted umbrella structure for attenuating the force of the wind when the umbrella is open
Air brush with removable paint regulating needle
Method and apparatus for wide field distortion-compensated imaging
Selecting alternate paths for network destinations
Sorting apparatus and method utilizing a mechanical diverter
Drug delivery device
Lanthanide-based catalyst composition for the manufacture of polydienes
Navigation system for orthopaedic surgery
System and method for cooperative scanning
Robbery in process warning system