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    METHOD AN DSYSTEM FOR TRACKING AND OBJECT RADIATING A CIRCULARLY OR LINEARLY POLARIZED ELECTROMAGNETIC SIGNAL
    2.
    发明专利
    METHOD AN DSYSTEM FOR TRACKING AND OBJECT RADIATING A CIRCULARLY OR LINEARLY POLARIZED ELECTROMAGNETIC SIGNAL 未知

    公开(公告)号：CA1141012A

    公开(公告)日：1983-02-08

    申请号：CA339226

    申请日：1979-11-06

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  DE PADOVA SALVATORE ,  SAVINI DARIO

    IPC: G01S3/42 ,  G01S3/14 ,  H01Q20060101 ,  H01Q25/04

    Abstract: In a tracking system for radio beacons using generation of TE21 mode components in a circular waveguide to detect misalignment, correct antenna alignment is achieved even where the signal from the beacon is linearly polarized by extracting TE21 mode signals from the waveguide through longitudinal pairs of slots in planes at an angle .pi./4 to one another, phase detecting the difference signals from said pairs of slots to provide signals for aligning the antenna on two orthogonal axes, and in the case of linear polarization rotating the slots about the waveguide axis so as to correspond with the rotation required of a 180.degree. polarizer receiving the waveguide signal through a 90.degree. polarizer so as to provide a predetermined polarization of the output signal.

    4.
    发明专利
    未知

    公开(公告)号：IT1195120B

    公开(公告)日：1988-10-12

    申请号：IT6762886

    申请日：1986-08-04

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  BRESCIANI DANIELE ,  CONTU SALVATORE ,  COCITO GIUSEPPE

    IPC: B25J19/02 ,  H01Q15/00 ,  H01Q15/14 ,  H01Q

    Abstract: A method of manufacturing dichroic antenna structures, which makes use of projector mounted on the mobile arm of a computer-controlled machine to project the shape of selective antenna elements on the surface of an insulating layer, clad with a metallic layer covered in turn with a photographic emulsion. Development and chemical etching of the exceeding conductive parts are then carried out.

    METHOD OF AND SYSTEM FOR TRACKING AN OBJECT RADIATING A CIRCULARLY OR LINEARLY POLARIZED ELECTROMAGNETIC SIGNAL
    6.
    发明专利
    METHOD OF AND SYSTEM FOR TRACKING AN OBJECT RADIATING A CIRCULARLY OR LINEARLY POLARIZED ELECTROMAGNETIC SIGNAL 未知

    公开(公告)号：DE2965529D1

    公开(公告)日：1983-07-07

    申请号：DE2965529

    申请日：1979-11-05

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  SAVINI DARIO ,  DE PADOVA SALVATORE

    IPC: G01S3/42 ,  G01S3/14 ,  H01Q20060101 ,  H01Q25/04

    Abstract: A tracking system is for a satellite emitting microwave signals from a beacon. The signals are circularly or linearly polarised. A ground antenna passes a signal received to a circular waveguide propagating the higher order TE21 mode. Two pairs of longitudinal slots (A, A'; B, B') on two planes passing through the waveguide axis which planes are angularly spaced from each other by pi/4 radians. The signals of each pair of slots are subtracted. The resulting difference signals are processed to provide signals representing the satellite position in a system of Cartesian coordinates (x, y, z). The angle (theta) which the reference plane containing two axes (x, z) of the system defines with that plane through a first pair of slots (A, A') is caused to equal half the angle defined between the plane of polarisation of the satellite signal and the reference plane, for a linearly-polarised signal.

    PARABOLIC REFLECTOR ANTENNA WITH OPTIMAL RADIATIVE CHARACTERISTICS
    8.
    发明专利
    PARABOLIC REFLECTOR ANTENNA WITH OPTIMAL RADIATIVE CHARACTERISTICS 未知

    公开(公告)号：CA1119292A

    公开(公告)日：1982-03-02

    申请号：CA327302

    申请日：1979-05-09

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  DE PADOVA SALVATORE

    IPC: H01Q13/02 ,  H01Q17/00 ,  H01Q19/13 ,  H01Q15/16 ,  H01Q19/10

    Abstract: An antenna for radiowaves comprises a parabolic reflector and feed, and when radiating according to mode TE11, the reflector has a ratio of focal distance to maximum diameter of 0.46 to 0.50, and the feed has a ratio of aperture radius to central wavelength of the used frequency hand of 0.52 to 0.60. When radiating according to a combination of modes TE11 and TM11, there is a direct and linear proportionality between the ratios. An antenna according to the present invention and with a simple feed has the advantage over known antennas of achieving high efficiency and low lobes in cross polarization.

    10.
    发明专利
    未知

    公开(公告)号：DE3767099D1

    公开(公告)日：1991-02-07

    申请号：DE3767099

    申请日：1987-08-03

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BIELLI PAOLO ,  BRESCIANI DANIELLE ,  CONTU SALVATORE ,  COCITO GUISEPPE

    IPC: B25J19/02 ,  H01Q15/00 ,  H01Q15/14 ,  B25J9/00

    Abstract: A method of manufacturing dichroic antenna structures, which makes use of projector mounted on the mobile arm of a computer-controlled machine to project the shape of selective antenna elements on the surface of an insulating layer, clad with a metallic layer covered in turn with a photographic emulsion. Development and chemical etching of the exceeding conductive parts are then carried out.

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