GB2475746A - Stabilised radar reflector located within a protective sphere - Google Patents
Stabilised radar reflector located within a protective sphere Download PDFInfo
- 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- Withdrawn
Links
- 230000001681 protective effect Effects 0.000 title abstract 2
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/18—Reflecting 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.
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)
| 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)
| 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 |
-
2010
- 2010-01-13 GB GB1000501A patent/GB2475746A/en not_active Withdrawn
Patent Citations (6)
| 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)
| 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) |