GB664722A - Improvements in radar equipment - Google Patents

Improvements in radar equipment

Info

Publication number
GB664722A
GB664722A GB17466/49A GB1746649A GB664722A GB 664722 A GB664722 A GB 664722A GB 17466/49 A GB17466/49 A GB 17466/49A GB 1746649 A GB1746649 A GB 1746649A GB 664722 A GB664722 A GB 664722A
Authority
GB
United Kingdom
Prior art keywords
vessel
aerial
july
systems
radar
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
GB17466/49A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips Electronics NV
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 Philips Gloeilampenfabrieken NV, Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB664722A publication Critical patent/GB664722A/en
Expired 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
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

664,722. Directive radio systems. PHILIPS ELECTRICAL, Ltd. July 1, 1949 [July 6, 1948], No. 17466/49. Class 40 (vii). In a marine radar system which scans the surroundings of a vessel and indicates the position of reflecting objects on a position indicator, obstacles, such as the foremast of the vessel, may obstruct the view of the radar in certain directions. To avoid this the invention uses two scanning aerial systems mounted one on each side of the vessel, connected in parallel electrically, having their maximum sensitivities in the same direction, and scanned in synchronism. The aerial systems may each comprise an antenna backed by a reflector and arranged to scan by physical movement about a vertical axis or they may comprise fixed arrays the directivity of which is varied by varying the phase shifts in the feeders to the elements of the array or the frequency of the applied signal. For a 3 to 10 cm. transmission wavelength an aerial system separation of 10 metres is suggested.
GB17466/49A 1948-07-06 1949-07-01 Improvements in radar equipment Expired GB664722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL274278X 1948-07-06

Publications (1)

Publication Number Publication Date
GB664722A true GB664722A (en) 1952-01-09

Family

ID=19782068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17466/49A Expired GB664722A (en) 1948-07-06 1949-07-01 Improvements in radar equipment

Country Status (5)

Country Link
BE (1) BE489974A (en)
CH (1) CH274278A (en)
DE (1) DE807102C (en)
GB (1) GB664722A (en)
NL (2) NL141336B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432458A (en) * 2005-11-18 2007-05-23 Boeing Co Antenna positioning methods with line-of-sight obstruction avoidance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2432458A (en) * 2005-11-18 2007-05-23 Boeing Co Antenna positioning methods with line-of-sight obstruction avoidance
US7250915B2 (en) 2005-11-18 2007-07-31 The Boeing Company Satellite antenna positioning system
GB2432458B (en) * 2005-11-18 2008-02-20 Boeing Co Satellite antenna positioning system

Also Published As

Publication number Publication date
CH274278A (en) 1951-03-31
DE807102C (en) 1951-06-25
BE489974A (en)
NL141336B (en)
NL67919C (en)

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