WO2013051945A1 - Ground penetrating radar antenna - Google Patents
Ground penetrating radar antenna Download PDFInfo
- Publication number
- WO2013051945A1 WO2013051945A1 PCT/NO2012/050193 NO2012050193W WO2013051945A1 WO 2013051945 A1 WO2013051945 A1 WO 2013051945A1 NO 2012050193 W NO2012050193 W NO 2012050193W WO 2013051945 A1 WO2013051945 A1 WO 2013051945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- antennas
- antenna system
- ground
- accordance
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
- H01Q21/12—Parallel arrangements of substantially straight elongated conductive units
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
-
- 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
- H01Q3/01—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 shape of the antenna or antenna system
Definitions
- the technical field of the invention comprises an antenna system for ground penetrating radar, where the transmitted electromagnetic waves primarily radiate down into the ground.
- a ground penetrating radar is a type of radar which transmits electromagnetic waves (radio waves) down into the ground, and measures the reflection from objects or stratifications underground.
- the antenna for this type of radar must cause the transmitted signal to penetrate down into the ground in the best manner possible. Thus, the antenna should be placed in close proximity to the ground.
- separate transmitter and receiver units are usually employed and mounted next to each other.
- the radar waves which are reflected upwards form the ground itself will be reflected one additional time by the antenna construction, which due to the connected ground planes constitutes a so-called corner reflector.
- the reflected signals will again enter the ground and generate so- called multiple signals, which reduces the fidelity of the radar image.
- a third disadvantage of the construction is that it gives a strong direct wave from the transmitter antenna to the receiver antenna because these antennas are located opposite to each other.
- the antenna is now further developed to a new antenna system in accordance with the present invention, which discloses a new and improved solution to the above mentioned.
- the present invention allows for a considerable suppression of the direct wave from the transmitter antenna to the receiver antenna, approximately complete elimination of the double pulse, and considerable suppression of multiples between antenna and ground surface.
- Another object of the present invention is to enable a simpler and more stable mechanical construction of the antenna system.
- the characteristic features of the antenna system in accordance with the present invention are apparent in
- the antenna system for ground penetrating radar in accordance with the invention comprises two sheet like antenna arrangements, where the two antenna
- each antenna arrangement respectively comprises at least one transmitter antenna and at least one receiver antenna.
- the antennas in each antenna arrangement consist of monopoles formed by applying metal surfaces to an electrical insulating carrier sheet which is located on the underside of a layer of a radar absorbing material, where the top side of the material layer is covered by a metallic ground plane.
- the antenna arrangements are arranged in order to have a downwards sloping position from the feeding points, in order for the antenna arrangements to form a V-shaped wedge with the tip pointed down towards the ground during normal operation.
- the ground planes it is advantageous for the ground planes not to be in electric connection with each other.
- the transmitter antenna and receiver antenna are mainly V-shaped.
- an angle (a) in the vertical plane between the two antenna arrangements may be adjusted by use of a non-conducting hinge
- the terminal points of the antennas are typically connected to the ground plane through resistors and spacers.
- the terminal points of the transmitter antenna it is an advantage for the terminal points of the transmitter antenna to be directed towards the terminal points of the receiver antenna.
- the antenna system may comprise a plurality of transmitter antennas and a plurality of receiver antennas, making up a linear array of antennas distributed along the symmetry axis between the two antenna
- the radar absorbing material may consist of one or more resistant layers.
- the sheet carrier can be a laminate, especially a circuit board laminate, preferably consisting of a glass fibre substrate.
- Figure 1 shows a cross-section of the antenna system seen from the side.
- Figure 2 shows an embodiment of the antenna system according to the present invention seen from the underside.
- Figure 3 shows an embodiment of the antenna system in accordance with the present invention where several transmitter antenna and several receiver antenna are distributed along the symmetry axis of the antenna system.
- FIG 1 shows an antenna system consisting of two antenna arrangements for respectively sending and receiving as described below.
- the transmitter antennas and receiver antennas (1 -2) consists of monopoles made from electrically conductive material on an electrically insulating sheet carrier (3), that may e.g. be a 1 .55 mm thick circuit board laminate of the type FR-4.
- the monopoles may for example be triangularly shaped or V-shaped for optimal impedance matching to the feeding point (6).
- the circuit board laminates (3) are located on the underside of the sheet consisting of a absorbing material (4) that absorbs radio waves. This could either be a material consisting of thin resistive layers, or it could be radar absorbing material e.g. of the type Eccosorb AN79 from Emerson and Cuming.
- the absorbing material is placed on an underlying ground plane (5) consisting of metal.
- the antennas (1 -2) for transmitting and receiving are constructed the same way. Each of the antennas are fed by means of a coaxial cable at the feeding point (6), where the centre line of the coaxial cable is connected to the antenna (1 ,2), and the screen is connected to the ground plane (5).
- the antennas outer parts which hereafter are called the terminal points, are connected to the ground plane through a resistor (7) of e.g. 50 ohm, which is mounted on the ground plane (5).
- the antenna arrangements are arranged to form a V-shaped wedge with the tip pointed down towards the ground.
- the antennas terminal points are closest to the ground (10), and the spacers (8) provide mechanical attachment of the circuit board laminate (3) to the ground plane (5).
- the two parts of the ground plane are in this example connected to each other by means of a non-conductive hinge (9), which enables adjustment of the angle a between the antennas to an optimal value.
- the ground planes for transmitter antenna and receiver antenna respectively does not have an electrical connection with each other.
- Another feature of the invention is that the terminal points of the antennas are pointed at each other instead of the furthest possible away from each other.
- the optimal value for the angle a will vary from measuring problem to measuring problem, and the soil dielectric characteristics will be the deciding factor.
- the antennas will be arranged to have a downwards sloping position from the feed point (6).
- Figure 2 shows an embodiment of the antenna system from below, where the transmitting antenna and receiving antenna (1 -2) are V-shaped with a resistor (7) and metallic spacers to the ground plane (8) located the furthest away from the feed point (6).
- FIG. 3 Another embodiment of the antenna system according to the present invention is shown in figure 3.
- Said figure shows a linear antenna array comprising several transmitter antennas and several receiver antennas distributed along the antenna system's symmetrical axis, which runs through the hinge (9) at the bottom of the tip of the V-shaped wedge.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Electromagnetism (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280045740.6A CN103858274B (en) | 2011-10-07 | 2012-10-04 | Ground exploring radar antenna |
AU2012319274A AU2012319274B2 (en) | 2011-10-07 | 2012-10-04 | Ground penetrating radar antenna |
US14/349,373 US9478872B2 (en) | 2011-10-07 | 2012-10-04 | Ground penetrating radar antenna |
EP12838565.5A EP2764573B1 (en) | 2011-10-07 | 2012-10-04 | Ground penetrating radar antenna |
JP2014534509A JP5937219B2 (en) | 2011-10-07 | 2012-10-04 | Ground penetrating radar antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20111363 | 2011-10-07 | ||
NO20111363A NO335197B1 (en) | 2011-10-07 | 2011-10-07 | Georadarantenne |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013051945A1 true WO2013051945A1 (en) | 2013-04-11 |
Family
ID=48043970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2012/050193 WO2013051945A1 (en) | 2011-10-07 | 2012-10-04 | Ground penetrating radar antenna |
Country Status (7)
Country | Link |
---|---|
US (1) | US9478872B2 (en) |
EP (1) | EP2764573B1 (en) |
JP (1) | JP5937219B2 (en) |
CN (1) | CN103858274B (en) |
AU (1) | AU2012319274B2 (en) |
NO (1) | NO335197B1 (en) |
WO (1) | WO2013051945A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104007420A (en) * | 2014-06-18 | 2014-08-27 | 中国矿业大学(北京) | Low-frequency combined antenna system for CT-transmission geological radar |
WO2015115906A1 (en) * | 2014-01-30 | 2015-08-06 | 3D-Radar As | Antenna system for ground penetrating radar |
WO2022227361A1 (en) * | 2021-04-27 | 2022-11-03 | 深圳迈睿智能科技有限公司 | Half-wave back-folding directional microwave detection antenna |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104953257B (en) * | 2015-05-27 | 2018-06-19 | 中国科学院电子学研究所 | ultra-wideband radar antenna |
RU2640291C1 (en) * | 2016-09-30 | 2017-12-27 | Андрей Ильич Беркут | Device for radar sensing substrate surface |
CN108417965A (en) * | 2018-01-17 | 2018-08-17 | 深圳乐测物联网科技有限公司 | A kind of wireless signal Enhancement Method and a kind of wireless device |
KR101945824B1 (en) * | 2018-07-30 | 2019-02-07 | 한국지질자원연구원 | Air-coupled type ground penetrating radar antenna |
CN114024133B (en) * | 2022-01-05 | 2022-04-29 | 中国人民解放军海军工程大学 | Novel dipole antenna |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2004042427A1 (en) * | 2002-11-05 | 2004-05-21 | 3D-Radar As | Antenna system for georadar |
EP1542314A1 (en) * | 2003-12-11 | 2005-06-15 | Sony International (Europe) GmbH | Three-dimensional omni-directional monopole antenna designs for ultra- wideband applications |
JP2007201868A (en) * | 2006-01-27 | 2007-08-09 | Mitsubishi Electric Corp | Transmission/reception antenna for radar equipment |
Family Cites Families (10)
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GB9103737D0 (en) * | 1991-02-22 | 1991-04-10 | Pilkington Plc | Antenna for vehicle window |
JP2630570B2 (en) | 1994-10-03 | 1997-07-16 | 宇宙開発事業団 | Radar equipment |
NL1014383C2 (en) | 2000-02-15 | 2001-08-16 | Stichting Tech Wetenschapp | Bow tie antenna. |
US6670906B1 (en) | 2000-11-20 | 2003-12-30 | Geophysical Survey Systems, Inc. | Method for determining accurately coordinates of a GPR antenna relative to a fixed reference |
US7659851B2 (en) * | 2006-01-11 | 2010-02-09 | Microsoft Corporation | Radio frequency certificates of authenticity and related scanners |
GB2439110B (en) * | 2006-06-13 | 2009-08-19 | Thales Holdings Uk Plc | An ultra wideband antenna |
US7924233B2 (en) | 2006-12-22 | 2011-04-12 | Wistron Neweb Corporation | Three-dimensional antenna and related wireless communication device |
NL1037058C2 (en) | 2009-06-23 | 2011-02-15 | Groundtracer B V | Improved ground penetrating radar. |
EP2348577B1 (en) | 2010-01-14 | 2015-08-26 | Tyco Electronics Nederland B.V. | Low height antenna |
JP6339319B2 (en) * | 2013-04-16 | 2018-06-06 | 日本ピラー工業株式会社 | Microstrip antenna and portable terminal |
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2011
- 2011-10-07 NO NO20111363A patent/NO335197B1/en unknown
-
2012
- 2012-10-04 CN CN201280045740.6A patent/CN103858274B/en active Active
- 2012-10-04 AU AU2012319274A patent/AU2012319274B2/en active Active
- 2012-10-04 EP EP12838565.5A patent/EP2764573B1/en active Active
- 2012-10-04 WO PCT/NO2012/050193 patent/WO2013051945A1/en active Application Filing
- 2012-10-04 JP JP2014534509A patent/JP5937219B2/en active Active
- 2012-10-04 US US14/349,373 patent/US9478872B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004042427A1 (en) * | 2002-11-05 | 2004-05-21 | 3D-Radar As | Antenna system for georadar |
EP1542314A1 (en) * | 2003-12-11 | 2005-06-15 | Sony International (Europe) GmbH | Three-dimensional omni-directional monopole antenna designs for ultra- wideband applications |
JP2007201868A (en) * | 2006-01-27 | 2007-08-09 | Mitsubishi Electric Corp | Transmission/reception antenna for radar equipment |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015115906A1 (en) * | 2014-01-30 | 2015-08-06 | 3D-Radar As | Antenna system for ground penetrating radar |
NO337125B1 (en) * | 2014-01-30 | 2016-01-25 | 3D Radar As | Antenna system for georadar |
CN106415324A (en) * | 2014-01-30 | 2017-02-15 | 3D雷达公司 | Antenna system for ground penetrating radar |
JP2017511875A (en) * | 2014-01-30 | 2017-04-27 | スリーディ−レーダー アクティーゼルスカブ3D−Radar As | Antenna system for ground penetrating radar |
US9843101B2 (en) | 2014-01-30 | 2017-12-12 | 3D-Radar As | Antenna system for ground penetrating radar |
CN104007420A (en) * | 2014-06-18 | 2014-08-27 | 中国矿业大学(北京) | Low-frequency combined antenna system for CT-transmission geological radar |
CN104007420B (en) * | 2014-06-18 | 2015-03-11 | 中国矿业大学(北京) | Low-frequency combined antenna system for CT-transmission geological radar |
WO2022227361A1 (en) * | 2021-04-27 | 2022-11-03 | 深圳迈睿智能科技有限公司 | Half-wave back-folding directional microwave detection antenna |
Also Published As
Publication number | Publication date |
---|---|
EP2764573B1 (en) | 2020-05-06 |
US9478872B2 (en) | 2016-10-25 |
NO20111363A1 (en) | 2013-04-08 |
CN103858274A (en) | 2014-06-11 |
US20140240196A1 (en) | 2014-08-28 |
EP2764573A1 (en) | 2014-08-13 |
JP5937219B2 (en) | 2016-06-22 |
CN103858274B (en) | 2016-05-18 |
AU2012319274A1 (en) | 2014-03-20 |
AU2012319274B2 (en) | 2016-05-19 |
JP2015501091A (en) | 2015-01-08 |
EP2764573A4 (en) | 2015-12-16 |
NO335197B1 (en) | 2014-10-20 |
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