WO1986000998 ANTENNA TRACKING SYSTEM USING SEQUENTIAL LOBING

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Publication Number WO/1986/000998

Publication Date 13.02.1986

International Application No. PCT/IT1985/000022

International Filing Date 24.07.1985

IPC

CPC

Applicants

SELENIA SPAZIO [IT]/[IT] (AllExceptUS)
PERROTTA, Giorgio [IT]/[IT] (UsOnly)
LOSQUADRO, Giacinto [IT]/[IT] (UsOnly)

Inventors

PERROTTA, Giorgio
LOSQUADRO, Giacinto

Agents

MARZI, Adriana

Priority Data

48646-A/84

27.07.1984

Publication Language English (en)

Filing Language English (EN)

Designated States

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Title

(EN) ANTENNA TRACKING SYSTEM USING SEQUENTIAL LOBING

(FR) SYSTEME DE POURSUITE A ANTENNE AVEC COMMUTATION SEQUENTIELLE DE LOBES

Abstract

(EN) System fine tracking R.F. sensor based capable of acquiring ground beacons within an angular field which is substantially larger than the -3 dB antennae beamwidth beams, to be used preferably on board artificial telecommunication satellites equipped with single or multiple beams antennae.

(FR) Un système de poursuite précise à senseur HF est susceptible de localiser des faisceaux au sol dans un champ angulairement sensiblement plus grand que les faisceaux d'antennes de largeur de faisceau -3dB. Le système est utilisé de préférence dans des satellites artificiels de télécommunications pourvus d'antennes à faisceaux uniques ou multiples.

G	PHYSICS
01	MEASURING; TESTING
S	RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3	Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02	using radio waves
14	Systems for determining direction or deviation from predetermined direction
16	using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
22	derived from different combinations of signals from separate antennas, e.g. comparing sum with difference

G	PHYSICS
01	MEASURING; TESTING
S	RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3	Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02	using radio waves
14	Systems for determining direction or deviation from predetermined direction
38	using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal
42	the desired condition being maintained automatically

G	PHYSICS
01	MEASURING; TESTING
S	RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3	Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02	using radio waves
14	Systems for determining direction or deviation from predetermined direction
16	using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
22	derived from different combinations of signals from separate antennas, e.g. comparing sum with difference

G	PHYSICS
01	MEASURING; TESTING
S	RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3	Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02	using radio waves
14	Systems for determining direction or deviation from predetermined direction
38	using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal
42	the desired condition being maintained automatically

G	PHYSICS
01	MEASURING; TESTING
S	RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3	Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02	using radio waves
14	Systems for determining direction or deviation from predetermined direction
16	using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
22	derived from different combinations of signals from separate antennas, e.g. comparing sum with difference

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1. WO1986000998 - ANTENNA TRACKING SYSTEM USING SEQUENTIAL LOBING