JPS5720001A - Active antenna system - Google Patents

Active antenna system

Info

Publication number
JPS5720001A
JPS5720001A JP9471380A JP9471380A JPS5720001A JP S5720001 A JPS5720001 A JP S5720001A JP 9471380 A JP9471380 A JP 9471380A JP 9471380 A JP9471380 A JP 9471380A JP S5720001 A JPS5720001 A JP S5720001A
Authority
JP
Japan
Prior art keywords
circuit
weight control
radiation pattern
null
supplied
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.)
Pending
Application number
JP9471380A
Other languages
Japanese (ja)
Inventor
Hidehiro Takahashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9471380A priority Critical patent/JPS5720001A/en
Publication of JPS5720001A publication Critical patent/JPS5720001A/en
Pending 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
    • H01Q3/2605—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
    • H01Q3/2617—Array of identical elements

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To eliminate interference waves completely at low cost by providing a weight control circuit individually so that the arrival direction of an interference wave from the output of the weight control circuit and a radiation pattern which is null in the direction is formed. CONSTITUTION:A weight control circuit 24 inputs the output of a synthesizer 3 and those of antenna elements 211-21n to generate weight control signals to be supplied to respective multipliers 221-22n. A weight control curcuit 26, on the other hand, obtains information on a point in the minimum value direction of a radiation pattern found by the circuit 25 and then generates a weight control signal for generating a new radiation pattern which is null in the direction. Then, a switch circuit 27 is changed over to the circuit 26 side periodically or upon occasion. Consequently, the normal adaptive mechanism of the circuit 24 stops and the circuit 26 operates. The weight control signal generated by this circuit 26 is supplied to the multipliers 221-22n to generate the radiation pattern where interference waves are eliminated completely and which is null in a prescribed direction.
JP9471380A 1980-07-11 1980-07-11 Active antenna system Pending JPS5720001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9471380A JPS5720001A (en) 1980-07-11 1980-07-11 Active antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9471380A JPS5720001A (en) 1980-07-11 1980-07-11 Active antenna system

Publications (1)

Publication Number Publication Date
JPS5720001A true JPS5720001A (en) 1982-02-02

Family

ID=14117781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9471380A Pending JPS5720001A (en) 1980-07-11 1980-07-11 Active antenna system

Country Status (1)

Country Link
JP (1) JPS5720001A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029989A1 (en) * 1999-10-21 2001-04-26 Matsushita Electric Industrial Co., Ltd. Array-antenna wireless communication device, and method of generating weight coefficient
US6714584B1 (en) 1998-04-07 2004-03-30 Nec Corporation CDMA adaptive antenna receiving apparatus and communication system
US7031368B1 (en) 1998-06-30 2006-04-18 Nec Corporation Adaptive transmitter/receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6714584B1 (en) 1998-04-07 2004-03-30 Nec Corporation CDMA adaptive antenna receiving apparatus and communication system
US7031368B1 (en) 1998-06-30 2006-04-18 Nec Corporation Adaptive transmitter/receiver
WO2001029989A1 (en) * 1999-10-21 2001-04-26 Matsushita Electric Industrial Co., Ltd. Array-antenna wireless communication device, and method of generating weight coefficient
US7110733B1 (en) 1999-10-21 2006-09-19 Matsushita Electric Industrial Co., Ltd. Array antenna radio communication apparatus and weight coefficient generating method

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