FR2375761A1 - Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array - Google Patents

Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array

Info

Publication number
FR2375761A1
FR2375761A1 FR7638467A FR7638467A FR2375761A1 FR 2375761 A1 FR2375761 A1 FR 2375761A1 FR 7638467 A FR7638467 A FR 7638467A FR 7638467 A FR7638467 A FR 7638467A FR 2375761 A1 FR2375761 A1 FR 2375761A1
Authority
FR
France
Prior art keywords
modulation
fed
antennae
amplitude
sequential switching
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
FR7638467A
Other languages
French (fr)
Other versions
FR2375761B1 (en
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.)
Commonwealth Scientific and Industrial Research Organization CSIRO
Original Assignee
Commonwealth Scientific and Industrial Research Organization CSIRO
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 Commonwealth Scientific and Industrial Research Organization CSIRO filed Critical Commonwealth Scientific and Industrial Research Organization CSIRO
Priority to FR7638467A priority Critical patent/FR2375761A1/en
Publication of FR2375761A1 publication Critical patent/FR2375761A1/en
Application granted granted Critical
Publication of FR2375761B1 publication Critical patent/FR2375761B1/fr
Granted 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
    • H01Q3/24—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 orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • 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
    • H01Q3/36—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 variable phase-shifters
    • H01Q3/38—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 variable phase-shifters the phase-shifters being digital

Abstract

Modulation system for the power supplied to phase fed antennae systems, providing a narrow continuous swept beam at micro wave frequencies. The antennae array to be fed has, for example, 16 elements fed sequentially by four digital type phase modulators spaced at 22 deg. 30'. Each such modulator feeds an amplitude modulator which is coupled into four individual antennae elements distributed through the sixteen element array by a single switch. The four parallel modulation chains are fed from a common RF power source, the modulation providing an output which is determined by calculation of distributed current to produce the beam required, the conjugate of the current and amplitude limitation.
FR7638467A 1976-12-21 1976-12-21 Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array Granted FR2375761A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7638467A FR2375761A1 (en) 1976-12-21 1976-12-21 Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7638467A FR2375761A1 (en) 1976-12-21 1976-12-21 Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array

Publications (2)

Publication Number Publication Date
FR2375761A1 true FR2375761A1 (en) 1978-07-21
FR2375761B1 FR2375761B1 (en) 1982-11-05

Family

ID=9181316

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7638467A Granted FR2375761A1 (en) 1976-12-21 1976-12-21 Modulation for HF swept beams - employs amplitude and phase modulation and sequential switching to fixed array

Country Status (1)

Country Link
FR (1) FR2375761A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661781A1 (en) * 1990-02-26 1991-11-08 Mitsubishi Electric Corp Antenna system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056961A (en) * 1957-08-15 1962-10-02 Post Office Steerable directional random antenna array
US3140490A (en) * 1961-11-30 1964-07-07 Sichak Associates Communication system with automatic antenna beam steering
FR1591231A (en) * 1967-11-03 1970-04-27
US3573837A (en) * 1969-06-30 1971-04-06 Us Navy Vector transfer feed system for a circular array antenna
US3670335A (en) * 1967-06-08 1972-06-13 Bell Telephone Labor Inc Arrays with nulls steered independently of main beam
FR2171256A1 (en) * 1972-02-07 1973-09-21 Commw Scient Ind Res Org
US3964066A (en) * 1975-01-02 1976-06-15 International Telephone And Telegraph Corporation Electronic scanned cylindrical-array antenna using network approach for reduced system complexity
US3993999A (en) * 1975-05-16 1976-11-23 Texas Instruments Incorporated Amplitude modulation scanning antenna system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056961A (en) * 1957-08-15 1962-10-02 Post Office Steerable directional random antenna array
US3140490A (en) * 1961-11-30 1964-07-07 Sichak Associates Communication system with automatic antenna beam steering
US3670335A (en) * 1967-06-08 1972-06-13 Bell Telephone Labor Inc Arrays with nulls steered independently of main beam
FR1591231A (en) * 1967-11-03 1970-04-27
US3573837A (en) * 1969-06-30 1971-04-06 Us Navy Vector transfer feed system for a circular array antenna
FR2171256A1 (en) * 1972-02-07 1973-09-21 Commw Scient Ind Res Org
GB1416364A (en) * 1972-02-07 1975-12-03 Commw Scient Ind Res Org Generation of scanning radio beans
US3964066A (en) * 1975-01-02 1976-06-15 International Telephone And Telegraph Corporation Electronic scanned cylindrical-array antenna using network approach for reduced system complexity
US3993999A (en) * 1975-05-16 1976-11-23 Texas Instruments Incorporated Amplitude modulation scanning antenna system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661781A1 (en) * 1990-02-26 1991-11-08 Mitsubishi Electric Corp Antenna system

Also Published As

Publication number Publication date
FR2375761B1 (en) 1982-11-05

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