GB1475297A - Aerial array processors - Google Patents

Aerial array processors

Info

Publication number
GB1475297A
GB1475297A GB3705873A GB3705873A GB1475297A GB 1475297 A GB1475297 A GB 1475297A GB 3705873 A GB3705873 A GB 3705873A GB 3705873 A GB3705873 A GB 3705873A GB 1475297 A GB1475297 A GB 1475297A
Authority
GB
United Kingdom
Prior art keywords
array
signal
fed
signals
line
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.)
Expired
Application number
GB3705873A
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3705873A priority Critical patent/GB1475297A/en
Publication of GB1475297A publication Critical patent/GB1475297A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01Q3/42—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 using frequency-mixing

Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1475297 Sonar receiving system PLESSEY CO Ltd 16 July 1974 [3 Aug 1973] 37058/73 Heading G1G [Also in Division H4] A radiant energy transducer array processor comprises signal subtraction means receiving one input signal from a main array and another input signal which is the aggregate of a plurality of individually weighted signals from an auxiliary array means. The said subtraction means provides a difference signal which controls the degree of weighting applied to each signal from the auxiliary array means. The degrees of weighting are also controlled by arranging that they have an algebraic sum which is substantially zero. As described, signals from the elements of a main array are fed via lines 1 through delay units 2 and weighting devices 3 into a summing combiner 4 to provide a signal on a line 5, which is connected to one input of a subtraction circuit 6. Part of the main array is also used as an auxiliary array means, signals from three centrally located elements being fed on lines 8, 9, 10 via respective adjustable weighting circuits 11, 12, 13 into a summing combiner 14, which is connected by a line 7 to the other input of the subtraction circuit 6. An output signal on a line 15, and a feedback signal for a primary feedback loop on a line 16, are provided by the subtraction circuit 6. The feedback signal is applied to multipliers 17, 18, 19, which are also fed with the auxiliary array signals on the lines 8, 9, 10. The output signals from the multipliers 17, 18, 19 are fed to integrators 20, 21, 22, each comprising an amplifier shunted by a capacitor, which provide control signals for the adjustable weighting circuits 11, 12, 13. In order to produce a wide-band null in the direction of the main beam, the weights 11, 12, 13 are constrained to sum algebraically to zero by means of a secondary feedback loop in which voltages from each integrator proportional to the weight of its associated weighting circuit are combined on a line 23, and are fed to a differential amplifier 24. A secondary feedback voltage provided by the amplifier 24 is fed to the integrators 20, 21, 22 so that in operation said secondary feedback voltage tends to reduce towards zero. In an alternative arrangement, the auxiliary array means is constituted by an array which is separate from the main array. The processor is particularly applicable to sonar systems, but may also be applied to radar systems.
GB3705873A 1974-07-16 1974-07-16 Aerial array processors Expired GB1475297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3705873A GB1475297A (en) 1974-07-16 1974-07-16 Aerial array processors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3705873A GB1475297A (en) 1974-07-16 1974-07-16 Aerial array processors

Publications (1)

Publication Number Publication Date
GB1475297A true GB1475297A (en) 1977-06-01

Family

ID=10393410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3705873A Expired GB1475297A (en) 1974-07-16 1974-07-16 Aerial array processors

Country Status (1)

Country Link
GB (1) GB1475297A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003359A1 (en) * 1984-01-23 1985-08-01 The Commonwealth Of Australia Care Of The Secretar Method of processing sensor elements
GB2242268A (en) * 1990-03-22 1991-09-25 Stc Plc Interference-cancelling adaptive antenna system
GB2251728A (en) * 1984-07-27 1992-07-15 Gen Electric Co Plc Receiving or transmitting apparatus
FR2690009A1 (en) * 1992-04-14 1993-10-15 Thomson Csf Linear constant directivity antenna and channel forming device for such an antenna.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003359A1 (en) * 1984-01-23 1985-08-01 The Commonwealth Of Australia Care Of The Secretar Method of processing sensor elements
GB2251728A (en) * 1984-07-27 1992-07-15 Gen Electric Co Plc Receiving or transmitting apparatus
GB2251728B (en) * 1984-07-27 1992-09-23 Gen Electric Co Plc Receiving or transmitting apparatus
GB2242268A (en) * 1990-03-22 1991-09-25 Stc Plc Interference-cancelling adaptive antenna system
GB2242268B (en) * 1990-03-22 1993-07-21 Stc Plc Adaptive antenna
FR2690009A1 (en) * 1992-04-14 1993-10-15 Thomson Csf Linear constant directivity antenna and channel forming device for such an antenna.
EP0566465A1 (en) * 1992-04-14 1993-10-20 Thomson-Csf Linear antenna array with constant directivity and device for beam forming for such an antenna

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee