GB2475746A - Stabilised radar reflector located within a protective sphere - Google Patents

Stabilised radar reflector located within a protective sphere Download PDF

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Publication number
GB2475746A
GB2475746A GB1000501A GB201000501A GB2475746A GB 2475746 A GB2475746 A GB 2475746A GB 1000501 A GB1000501 A GB 1000501A GB 201000501 A GB201000501 A GB 201000501A GB 2475746 A GB2475746 A GB 2475746A
Authority
GB
United Kingdom
Prior art keywords
reflector
sphere
radar
stabilised
radar reflector
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.)
Withdrawn
Application number
GB1000501A
Other versions
GB201000501D0 (en
Inventor
Anthony George Kearney
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.)
Individual
Original Assignee
Individual
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
Priority claimed from GB0920908A external-priority patent/GB0920908D0/en
Priority claimed from GB0922217A external-priority patent/GB0922217D0/en
Application filed by Individual filed Critical Individual
Publication of GB201000501D0 publication Critical patent/GB201000501D0/en
Publication of GB2475746A publication Critical patent/GB2475746A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/34Adaptation for use in or on ships, submarines, buoys or torpedoes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/42Housings not intimately mechanically associated with radiating elements, e.g. radome
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14Reflecting surfaces; Equivalent structures
    • H01Q15/18Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

A radar reflector comprises a reflector housed in a protective sphere 1 with positional stabilization means using gravity. The reflector may be a light weight corner reflector 4 assembled from interconnecting slotted aluminium plates. The said plates may include curved portions 3 located at the bottom of the reflector assembly. The reflector is arranged such that it can move freely within the sphere 1 in accordance with stabilisation spheres 6 which provide weights which move according to gravity to stable formations within the bottoin of the sphere 1. The movement of the reflector may be damped by the use of a viscous fluid in association with the stabilisation spheres 6.

Description

DESCRIPTION
REFLECTOR STABLIZER
This invention relates to a system for stablizing a radar reflector.
Background
Since the invention of radar two problems have been apparent (i) How to avoid detection (ii) How to ensure detection Problem (i) has resulted in stealth development using shape and material to misdirect or absorb radar beams (radar set transmissions). Problem (ii) is an issue with small boats and buoys as their movement results in loss of reflected beams creating the impression to the radar set operator that they are random reflections from waves, rain, marine creatures or flotsum.
Solutions (ii) which do not disclose the present invention.
The optimum as used by radar set manufacturers 5/6 la, ib, ic which is fixed on a pole in a field facing at radar beams. It's design is the basis of corner "Raincatcher" 1/6 and 4/6 reflectors.
Corner reflectors 5/6, 2a, 2b, 2c which are simple way of getting a good reflection. These are sometimes in a tower configuration. The "Raincatcher" corner reflector 5, 4/6, 1/6 modified with curves or as standard with straight edges is set as 5/6 la, ib, ic and is as effective as 5/6 la lb lc when orientated as in 1/6. This orientation presents problems with bird droppings, snow and debris being collected with the result that vessel owners orientate it to that of the less effective corner reflector 6/6 Ia, lb with point A at the top.
The "Raincatcher" reflector has also been a problem with sails and ropes being snagged on it's corners.
A problem common to all marine reflectors.
Radar reflectors are fixed on buoys, boats, yachts, vessels and other floating structures (all now termed marine units) and therefore become less effective when the marine unit heels, lists, rolls or pitches because reflected beams are misdirected and not returned to the radar set as echoes.
This turns a small marine unit into something similar to a stealth marine unit and a radar set would receive randon return beams thus not alerting the operator to the presence of a marine unit. It is claimed by large-ship owners that the vessel they ran down was not detected by radar.
Using the Raincatcher in a sphere it is protected from droppings, snow and debris as well as not being a hindrance to ropes and sails.
The reflector in the sphere is free to move being supported on its corner points (A) which are made of a material which has function (a) holds the reflector together, function (b) the end of the corner fitting is flat and sensibly parallel to the sides of the sphere, thus presenting a non-scratching surface to the sphere 1.
The sphere Manufacture of the sphere 1 is by vacuum forming of a material such as or similar to plastic.
Stablization of the reflector Stablization is achieved by moving the centre of gravity of the reflector to a point vertically below and next to the sphere.
The invention will now be described soley by use of example and with reference to the accompanying drawings.
Figure 1, 1/6 shows side elevation view of the radar reflector in the sphere at the correct position of orientation.
Figure 2, 1/6 shows a top plan view of the reflector in the sphere.
Figure 1, 2/6 show a side elevation and the means of stabilization next to the bottom of the sphere.
Figure 2, 2/6 shows a botton plan view of the reflector with stabilization spheres in place.
The sphere 1 is attached to the marine unit as exampled 3/6. The reflector is free to move and maintain it's position as the sphere changes it's postion in space with movement of the marine unit.
The radar reflector 5 is made from a material which reflects radar beams and is light in weight. e.g. aluminium.
The modification of the radar reflector is by the addition of an extension (7) to 3 plates which are then placed adjacent to each other to form the curved (7) bottom of the reflector.
GB1000501A 2009-11-30 2010-01-13 Stabilised radar reflector located within a protective sphere Withdrawn GB2475746A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0920908A GB0920908D0 (en) 2009-11-30 2009-11-30 Stablized radar reflector
GB0922217A GB0922217D0 (en) 2009-12-21 2009-12-21 Stablized radar reflector

Publications (2)

Publication Number Publication Date
GB201000501D0 GB201000501D0 (en) 2010-03-03
GB2475746A true GB2475746A (en) 2011-06-01

Family

ID=42028289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1000501A Withdrawn GB2475746A (en) 2009-11-30 2010-01-13 Stabilised radar reflector located within a protective sphere

Country Status (1)

Country Link
GB (1) GB2475746A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011042744A2 (en) 2009-10-08 2011-04-14 Surgical Innovations Limited Instrument arrangements
US20140368373A1 (en) * 2011-12-20 2014-12-18 Sadar 3D, Inc. Scanners, targets, and methods for surveying

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888675A (en) * 1956-02-07 1959-05-26 Martin Co Water borne inflatable radar reflector unit
GB908835A (en) * 1958-04-15 1962-10-24 Maxson Electronics Corp A container comprisng an outer portion and an inner portion floating freely on liquidwithin the outer portion
US3283328A (en) * 1963-11-13 1966-11-01 Bendix Corp Sounding balloon and target assembly
GB1421084A (en) * 1973-02-01 1976-01-14 Whittaker Corp Radar reflector buoy and method of making same
US4673934A (en) * 1984-11-13 1987-06-16 Gabb Corporation Inflatable radar reflector
US20080192576A1 (en) * 2005-08-03 2008-08-14 Frederick Vosburgh Water submersible communications devices and methods for using the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888675A (en) * 1956-02-07 1959-05-26 Martin Co Water borne inflatable radar reflector unit
GB908835A (en) * 1958-04-15 1962-10-24 Maxson Electronics Corp A container comprisng an outer portion and an inner portion floating freely on liquidwithin the outer portion
US3283328A (en) * 1963-11-13 1966-11-01 Bendix Corp Sounding balloon and target assembly
GB1421084A (en) * 1973-02-01 1976-01-14 Whittaker Corp Radar reflector buoy and method of making same
US4673934A (en) * 1984-11-13 1987-06-16 Gabb Corporation Inflatable radar reflector
US20080192576A1 (en) * 2005-08-03 2008-08-14 Frederick Vosburgh Water submersible communications devices and methods for using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011042744A2 (en) 2009-10-08 2011-04-14 Surgical Innovations Limited Instrument arrangements
US20140368373A1 (en) * 2011-12-20 2014-12-18 Sadar 3D, Inc. Scanners, targets, and methods for surveying

Also Published As

Publication number Publication date
GB201000501D0 (en) 2010-03-03

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)