EP0786826A3 - Intermodulation scattering communications apparatus - Google Patents

Intermodulation scattering communications apparatus Download PDF

Info

Publication number
EP0786826A3
EP0786826A3 EP97300507A EP97300507A EP0786826A3 EP 0786826 A3 EP0786826 A3 EP 0786826A3 EP 97300507 A EP97300507 A EP 97300507A EP 97300507 A EP97300507 A EP 97300507A EP 0786826 A3 EP0786826 A3 EP 0786826A3
Authority
EP
European Patent Office
Prior art keywords
antenna array
feeds
frequency
transmit amplifiers
scattering
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.)
Withdrawn
Application number
EP97300507A
Other languages
German (de)
French (fr)
Other versions
EP0786826A2 (en
Inventor
Arnold L. Berman
James D. Thompson
Michael I. Mandell
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.)
DirecTV Group Inc
Original Assignee
Hughes Aircraft Co
HE Holdings Inc
Hughes Electronics Corp
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, HE Holdings Inc, Hughes Electronics Corp filed Critical Hughes Aircraft Co
Publication of EP0786826A2 publication Critical patent/EP0786826A2/en
Publication of EP0786826A3 publication Critical patent/EP0786826A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/203—Strip line filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Multiple beam, multi-frequency communication apparatus (10) that provides for significant intermodulation scattering improvements for multiple beam, multi-frequency communications systems implemented using directly radiating active phased array (15), or multi-feed reflector systems fed from composite, multiple shared transmit amplifiers (13). The multiple bearn, multi-frequency communications apparatus (10) comprises a defocused antenna array (15) having a plurality of antenna elements (15a) and a plurality of feeds (15b). A hybrid amplifier structure (18) is coupled to the feeds (15b) of the defocused antenna array (15) and shares the plurality of transmit amplifiers (13) among the feeds (15b) of the antenna array (15). Assignment apparatus (20) is coupled to the hybrid amplifier structure (18) for assigning particular transmit amplifier (13) to be contributors to particular beams (16) radiated by the antenna array (15) in response to a desired beam profile (11). Improvements result from judicially combining the effects of the shared transmit amplifiers (13) (that carry all the signals in the frequency reuse system), with phasing effects inherent in rhe multiple beam radiating structure in order to realize the desired zonal frequency reuse pattem 21. An optimal assignment algorithm implemented in the assignment apparatus (20) results in a uniform distribution of power over the transmit amplifiers (13), resulting in corresponding improvements in system performance in the far field.
EP97300507A 1996-01-29 1997-01-28 Intermodulation scattering communications apparatus Withdrawn EP0786826A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59360096A 1996-01-29 1996-01-29
US593600 1996-01-29

Publications (2)

Publication Number Publication Date
EP0786826A2 EP0786826A2 (en) 1997-07-30
EP0786826A3 true EP0786826A3 (en) 1999-06-02

Family

ID=24375376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97300507A Withdrawn EP0786826A3 (en) 1996-01-29 1997-01-28 Intermodulation scattering communications apparatus

Country Status (1)

Country Link
EP (1) EP0786826A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105896081B (en) * 2016-04-27 2018-08-07 西安空间无线电技术研究所 A kind of automatically controlled restructural butler matrix feed networks of double frequency

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2315644A (en) * 1996-07-18 1998-02-04 Motorola Inc Geosynchronous communications satellite system with reconfigurable service area
US6104935A (en) * 1997-05-05 2000-08-15 Nortel Networks Corporation Down link beam forming architecture for heavily overlapped beam configuration
DE19756363A1 (en) * 1997-12-18 1999-06-24 Cit Alcatel Antenna feed arrangement
US5936592A (en) * 1998-06-05 1999-08-10 Ramanujam; Parthasarathy Reconfigurable multiple beam satellite reflector antenna with an array feed
US5936588A (en) * 1998-06-05 1999-08-10 Rao; Sudhakar K. Reconfigurable multiple beam satellite phased array antenna
SE9902984L (en) 1999-08-24 2001-02-25 Ericsson Telefon Ab L M Method and apparatus relating to a radio communication network
CN100455075C (en) * 2003-06-05 2009-01-21 中兴通讯股份有限公司 Realizing apparatus for space multi-wave beam feed network

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001456A1 (en) * 1986-08-14 1988-02-25 Hughes Aircraft Company Satellite communications system employing frequency reuse
US5132694A (en) * 1989-06-29 1992-07-21 Ball Corporation Multiple-beam array antenna
GB2281009A (en) * 1993-08-12 1995-02-15 Northern Telecom Ltd Base station antenna arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001456A1 (en) * 1986-08-14 1988-02-25 Hughes Aircraft Company Satellite communications system employing frequency reuse
US5132694A (en) * 1989-06-29 1992-07-21 Ball Corporation Multiple-beam array antenna
GB2281009A (en) * 1993-08-12 1995-02-15 Northern Telecom Ltd Base station antenna arrangement

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EGAMI S AND KAWAI M: "An Adaptive Multiple Beam System Concept", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol. SAC-5, no. 4, May 1987 (1987-05-01), New York, USA, pages 630 - 636, XP002099075 *
ROEDERER A G: "SEMI-ACTIVE REFLECTOR ANTENNAS", PROCEEDINGS OF THE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSIS), ANN ARBOR, JUNE 28 - JULY 2, 1993, vol. 3, 28 June 1993 (1993-06-28), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1338 - 1341, XP000452529 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105896081B (en) * 2016-04-27 2018-08-07 西安空间无线电技术研究所 A kind of automatically controlled restructural butler matrix feed networks of double frequency

Also Published As

Publication number Publication date
EP0786826A2 (en) 1997-07-30

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