GB1472893A - Directional antenna systems - Google Patents

Directional antenna systems

Info

Publication number
GB1472893A
GB1472893A GB431374A GB431374A GB1472893A GB 1472893 A GB1472893 A GB 1472893A GB 431374 A GB431374 A GB 431374A GB 431374 A GB431374 A GB 431374A GB 1472893 A GB1472893 A GB 1472893A
Authority
GB
United Kingdom
Prior art keywords
antennae
direction finding
signals
a2
signal
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
GB431374A
Original Assignee
Rudge A
Wunnenberg H
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 Rudge A, Wunnenberg H filed Critical Rudge A
Priority to GB431374A priority Critical patent/GB1472893A/en
Priority claimed from DK25875A external-priority patent/DK136563C/da
Publication of GB1472893A publication Critical patent/GB1472893A/en
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/06Arrays of individually energised antenna units similarly polarised and spaced apart
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06Systems determining position data of a target
    • G01S13/42Simultaneous measurement of distance and other co-ordinates
    • G01S13/44Monopulse radar, i.e. simultaneous lobing
    • G01S13/4409HF sub-systems particularly adapted therefor, e.g. circuits for signal combination
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06Systems determining position data of a target
    • G01S13/42Simultaneous measurement of distance and other co-ordinates
    • G01S13/44Monopulse radar, i.e. simultaneous lobing
    • G01S13/4481Monopulse hybrid systems, e.g. conopulse
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14Systems for determining direction or deviation from predetermined direction
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/02Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns

Abstract

1472893 Antennae; direction finding A W RUDGE and H WUNNENBERG 27 Jan 1975 [30 Jan 1974] 4313/74 Headings H4A and H4D A directional antenna system comprises a plurality of direction finding antenna which may be integrated with a communications antenna on, e.g. a communications satellite, which is to be maintained in the optimum reception position, by a follow-up device which is controlled by the direction error signals produced by an analysis circuit connected to receive signals from the direction finding antennae, which comprise at least two offset parabolic reflector antennae arranged to produce a common direction finding beam. As described, a two axis direction finding system, Fig. 3, comprises primary radiators F1, F2, F3, F4 situated at the focus of respective reflectors R1, R2, R3, R4 which each comprise an offset portion of a paraboloid (having an apex, e.g. 51 in Fig. 1, not shown). Antennae A1, A2 and A3, A4 provide directional error signals on the y and x axes respectively. The directional error signals are analysed in the passive microwave circuit of Fig. 4 comprising hybrid coupler H1 connected to antennae A1, A2 to produce a phase error signal S#1,2 at its a2 output, hybrid coupler A2 connected to antennae A3, A4 producing the orthogonal phase error signal S#3,4, and hybrid coupler H3 which produces the sum signal S#1,2 3 4 from all the antennae A1-A4. These signals are used in a known follow up control system to maintain the direction finding antenna in the direction of maximum signal reception. In Fig. 5 an embodiment for use in a communications satellite comprises the four direction finding antennae F1-F4 and in addition a fixed antenna F5 having a large half power beam width for transmission of telemetry signals and reception of command signals, and is connected to its TX/RX device Sp/Ep, which is also used to provide a signal equivalent to the sum signal from the direction finding antennae. This signal r is fed to error signal analysis circuit ASE to serve as the sum signal with reference to the difference signals fed from outputs a2 of hybrid couplers A1 and A2. In this case the sum signal present at the output a1 of hybrid coupler H3 may therefore be coupled to the communications receiver/transmitter Sn/En whereby the direction finding antennae may together constitute the main communications antenna of the satellite. As the analysis circuit cannot directly recognize the sign of the input directional error signals variable phase shift devices P11, P22, P33, P44 are provided and are commutated by a pulse train T to produce a small known phase shift in the error signals whereby the sign thereof may be recognized in ASE.
GB431374A 1974-01-30 1974-01-30 Directional antenna systems Expired GB1472893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB431374A GB1472893A (en) 1974-01-30 1974-01-30 Directional antenna systems

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
GB431374A GB1472893A (en) 1974-01-30 1974-01-30 Directional antenna systems
DE19742460624 DE2460624C2 (en) 1974-01-30 1974-12-20
DK25875A DK136563C (en) 1974-01-30 1975-01-27
FR7502547A FR2259452B1 (en) 1974-01-30 1975-01-28
LU71736A LU71736A1 (en) 1974-01-30 1975-01-28
IE16575A IE40485B1 (en) 1974-01-30 1975-01-28 Improvements in or relating to directional antenna systems
IT1964975A IT1031181B (en) 1974-01-30 1975-01-28 of directive antennas system with side load device
NL7501006A NL171645C (en) 1974-01-30 1975-01-28 Directional Antenna System.
BE152909A BE825015A (en) 1974-01-30 1975-01-30 Directional antenna system having a servo device

Publications (1)

Publication Number Publication Date
GB1472893A true GB1472893A (en) 1977-05-11

Family

ID=9774819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB431374A Expired GB1472893A (en) 1974-01-30 1974-01-30 Directional antenna systems

Country Status (6)

Country Link
BE (1) BE825015A (en)
DE (1) DE2460624C2 (en)
FR (1) FR2259452B1 (en)
GB (1) GB1472893A (en)
IT (1) IT1031181B (en)
LU (1) LU71736A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257568A (en) * 1991-06-07 1993-01-13 Gen Electric Spacecraft antenna pattern control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680143A (en) * 1970-07-01 1972-07-25 Hughes Aircraft Co Shaped beam antenna

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257568A (en) * 1991-06-07 1993-01-13 Gen Electric Spacecraft antenna pattern control system
GB2257568B (en) * 1991-06-07 1995-10-04 Gen Electric Spacecraft antenna pattern control system

Also Published As

Publication number Publication date
BE825015A1 (en)
IT1031181B (en) 1979-04-30
LU71736A1 (en) 1976-08-19
DE2460624C2 (en) 1982-08-19
BE825015A (en) 1975-07-30
DE2460624A1 (en) 1975-09-25
FR2259452B1 (en) 1982-10-29
FR2259452A1 (en) 1975-08-22

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Legal Events

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