CA2027456A1 - Satellite beam-forming network system having improved beam shaping - Google Patents

Satellite beam-forming network system having improved beam shaping

Info

Publication number
CA2027456A1
CA2027456A1 CA 2027456 CA2027456A CA2027456A1 CA 2027456 A1 CA2027456 A1 CA 2027456A1 CA 2027456 CA2027456 CA 2027456 CA 2027456 A CA2027456 A CA 2027456A CA 2027456 A1 CA2027456 A1 CA 2027456A1
Authority
CA
Canada
Prior art keywords
feed elements
array
main reflector
signals
reflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2027456
Other languages
French (fr)
Other versions
CA2027456C (en
Inventor
Timothy A. Murphy
Kenneth H. Renshaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of CA2027456A1 publication Critical patent/CA2027456A1/en
Application granted granted Critical
Publication of CA2027456C publication Critical patent/CA2027456C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/40—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with phasing matrix
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/007—Antennas or antenna systems providing at least two radiating patterns using two or more primary active elements in the focal region of a focusing device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H01Q3/2611—Means for null steering; Adaptive interference nulling
    • H01Q3/2629—Combination of a main antenna unit with an auxiliary antenna unit

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

A steerable beam antenna system (24) for use in satellite communication systems and including a main reflector (32) and an antenna array having a plurality of feed elements (50) is disclosed. Additional feed elements (314, 316) are positioned along with the array (116-119) and are used to cancel undesirable side lobes which appear as the beam is steered towards the end portions of a target area (324, 330). The antenna array is positionable at or near at least one focal point of the main reflector (48), and its feed elements can receive microwaves from or transmit microwaves toward the main reflector. A Butler matrix (110) having multiple input ports (310) and multiple outputs (312) is connected to the array of feed elements and substantially performs a spatial discrete Fourier transformation on a generated set of signals to be transmitted which have a predetermined phase relationship between the signals, which is necessary to create the steerable beam. The Butler matrix also can perform an inverse spatial transformation on a set of incoming signals focused on the array by the reflector and received by the feed elements.
CA 2027456 1989-11-08 1990-10-12 Satellite beam-forming network system having improved beam shaping Expired - Fee Related CA2027456C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43405989A 1989-11-08 1989-11-08
US434,059 1989-11-08

Publications (2)

Publication Number Publication Date
CA2027456A1 true CA2027456A1 (en) 1991-05-09
CA2027456C CA2027456C (en) 1995-09-26

Family

ID=23722654

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2027456 Expired - Fee Related CA2027456C (en) 1989-11-08 1990-10-12 Satellite beam-forming network system having improved beam shaping

Country Status (5)

Country Link
EP (1) EP0427201B1 (en)
JP (1) JPH03172003A (en)
AU (1) AU624742B2 (en)
CA (1) CA2027456C (en)
DE (1) DE69021993T2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993009613A1 (en) * 1991-10-28 1993-05-13 Calling Communications Corporation Satellite communication system
GB2324912B (en) * 1994-04-18 1999-02-24 Int Mobile Satellite Org Beam-forming network
WO2012161612A1 (en) 2011-05-23 2012-11-29 Autonomous Non-Commercial Organization "Research Institute "Sitronics Labs"" Electronically beam steerable antenna device
RU2530330C1 (en) 2013-03-22 2014-10-10 Общество с ограниченной ответственностью "Радио Гигабит" Radio relay communication station with scanning antenna
RU2595941C2 (en) 2014-05-06 2016-08-27 Общество с ограниченной ответственностью "Радио Гигабит" Radio relay communication system with beam control
US9973266B1 (en) * 2017-06-12 2018-05-15 Ast & Science, Llc System and method for high throughput fractionated satellites (HTFS) for direct connectivity to and from end user devices and terminals using flight formations of small or very small satellites

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4595929A (en) * 1982-04-13 1986-06-17 Communications Satellite Corporation Scheme for aberration correction in scanning or multiple beam confocal antenna system
JPS60196003A (en) * 1984-03-19 1985-10-04 Nippon Telegr & Teleph Corp <Ntt> Multi-beam antenna of low side lobe
AU604082B2 (en) * 1986-12-22 1990-12-06 Hughes Electronics Corporation Steerable beam antenna system using butler matrix

Also Published As

Publication number Publication date
AU624742B2 (en) 1992-06-18
JPH03172003A (en) 1991-07-25
AU6476590A (en) 1991-05-16
EP0427201A2 (en) 1991-05-15
EP0427201A3 (en) 1991-12-11
EP0427201B1 (en) 1995-08-30
CA2027456C (en) 1995-09-26
DE69021993D1 (en) 1995-10-05
DE69021993T2 (en) 1996-02-22

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed