GB2490416A - GPS antenna with jamming signal shielding - Google Patents
GPS antenna with jamming signal shielding Download PDFInfo
- Publication number
- GB2490416A GB2490416A GB1207300.3A GB201207300A GB2490416A GB 2490416 A GB2490416 A GB 2490416A GB 201207300 A GB201207300 A GB 201207300A GB 2490416 A GB2490416 A GB 2490416A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jamming signal
- shielding
- antenna
- jamming
- signal
- 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- Withdrawn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
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000035945 sensitivity Effects 0.000 claims abstract description 9
- 239000003973 paint Substances 0.000 claims abstract description 7
- 238000010422 painting Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000004020 conductor Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 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
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/425—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising a metallic grid
-
- 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
-
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
-
- G—PHYSICS
- G12—INSTRUMENT DETAILS
- G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
- G12B17/00—Screening
- G12B17/02—Screening from electric or magnetic fields, e.g. radio waves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- 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
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Details Of Aerials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
An antenna apparatus comprises an antenna cover 120 which includes a shielding unit 110 formed on a predetermined portion of one hemispherical surface of the antenna cover. The shielding unit 110 may be formed of electromagnetic shielding material which may reflect or absorb a jamming signal. The shielding 110 may cover a range of low angle signal reception directions relative to the antenna. The shielding 110 may be in the form of a paint applied to a surface of an antenna cover. The shielding 110 may be controlled to block certain signal directions. The shielding material may be formed on or adjacent the surface of a hemispherical, electromagnetic transparent radome. The shielding may be arranged to be rotated in a vertical and/or horizontal manner to block one or more jamming signals. Also disclosed is a method for shielding an antenna, comprising: detecting if a jamming signal is present. If a jamming signal is detected, then the shielding is rotated until the jamming signal is at a receive sensitivity or less. If no jamming signal is detected then the position of the shielding is controlled such that the shielding is located in a north direction relative to the antenna. The apparatus and method provides a simple and cheap way of avoiding jamming signals.
Description
APPARATUS AND METHOD FOR SHIELDING JAMMING SIGNAL
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to and the benefit of Korean Patent Application No. 10-2011-0038709 and 10- 2011-0072118 filed in the Korean Intellectual Property Office on April 26, 2011, and July 20, 2011, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
The present invention relates to an apparatus and a method for shielding GPS Antenna from a jamming signal.
More particularly, the present invention relates to an apparatus and a method for shielding GPS Antenna from a jamming signal to jam a satellite navigation signal.
BACKGROUND ART
A GPS of America, a GIJONASS of Russia, and so on are operating as a global navigation satellite system (GNSS) which is represented by a GPS. However, since cases where a GPS signal is not received well when jamming signal occur often, anti-jamming or mitigation of jamming signal are being variously discussed.
An antenna system is included as a measure or mitigation for GPS jamming. Jamming can be reduced by using antenna, and RF, and baseband. The GPS receiver including antenna does not distort the input signal when it removes the jamming signal whenever jamming signal affects GPS signal. Rejection of GPS jamming by using signal processing including beam-forming antenna is very complicated and expensive.
SUMMARY OF THE INVENTION
The present invention has been made in an effort to provide an apparatus and a method for shielding GPS antenna from a jamming signal by a jamming signal shielding unit having an electromagnetic shielding layer on the surface of an antenna cover so that all the GPS jamming signals inputted at a predetermined angle and low elevation angle may be shielded, as a resistance against GPS jamming by considering that the GPS jamming signals are almost radiated at a predetermined angle and low elevation angle for a specific purpose. Predetermined angle is defined as spatial zone where GPS satellites never present) . As and example, we may shield semi-hemisphere transparent cover elevation angle from 66 degrees at north to 10 degree at south for the place of latitude 36 north and it can shield most of jamming signal from almost all direction at zero degree elevation angle. It is not limited to fixed scheme but, also, rotatable one.
An exemplary embodiment of the present invention provides an apparatus for shielding GPS antenna from a jamming signal shielding GPS antenna from a jamming signal, including: an antenna cover covering an antenna for receiving a target GPS signal; and a jamming signal shielding unit formed on at least one surface of the antenna cover and shielding GPS antenna from a jamming signal shielding GPS antenna from a jamming signal to jam the target GPS signal.
The jamming signal shielding unit may be formed at a surface area of the antenna cover enough to shield all the jamming signals entering in at least one direction like north in Korea without any loss of signal but it is not limited to fixed one it can be rotated with some loss of signal.
The jamming signal shielding unit may be formed by painting a paint having an electromagnetic shielding function on one surface of the antenna cover or by attaching an electromagnetic shielding material to one surface of the antenna cover.
The jamming signal shielding unit may be formed at a surface area of the antenna cover within a predetermined angle from one side of the antenna cover toward a directional value based on the directional value in which the jamming signal is inputted as fixed unit. The apparatus for shielding GPS antenna from a jamming may further include a direction display unit displaying directions, in which the jamming signal shielding unit may be rotatably formed based on an acquired directional value displayed through the direction display unit whenever the directional value is acquired.
The jamming signal shielding unit may be formed on an inner surface of the antenna cover.
The jamming signal shielding unit may be formed to be attached to or be coated to the antenna cover.
Another exemplary embodiment of the present invention provides a method for shielding GPS antenna from a jamming signal including: detecting whether or not a jamming signal to jam a target GPS signal is inputted; rotating the antenna cover with a jamming signal shielding unit for shielding the jamming signal until a received jamming signal is died down enough.; and controlling a position of the antenna cover so that the jamming signal shielding unit faces the due north direction, when the input jamming is not detected.
According to the exemplary embodiments of the present invention, the following effects may be acquired.
First, it is possible to effectively shield all the GPS jamming signals inputted at a predetermined angle by forming a jamming signal shielding unit having an electromagnetic shielding function on the surface of an antenna cover for covering an antenna as a measure against GPS jamming. Second, since the configuration of the apparatus is simplified, it is possible to easily manufacture the apparatus and reduce costs required for manufacturing the apparatus.
The foregoing summary is illustrative only and is
not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the
following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a conceptual diagram illustrating an apparatus for shielding GPS antenna from a jamming signal according to an exemplary embodiment of the present invention.
FIG. 2 is an exemplified diagram illustrating a jamming signal shielding unit configuring the apparatus for shielding GPS antenna from a jamming signal of FIG. 1.
FIG. 3 is a 3D reference diagram illustrating the jamming signal shielding unit shown in FIG. 2.
FIG. 4 is a color drawing illustrating a structural principle of the apparatus for shielding GPS antenna from a jamming signal shown in FIG. 1.
FIG. 5 is a photograph illustrating an apparatus for shielding GPS antenna from a jamming signal which is actually manufactured.
FIG. 6 is a flowchart illustrating a method for shielding GPS antenna from a jamming signal according to another exemplary embodiment of the present invention.
It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.
In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
DETAILED DESCRIPTION
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, we should note that in giving reference numerals to elements of each drawing, like reference numerals refer to like elements even though like elements are shown in different drawings. In describing the present invention, well-known functions or constructions will not be described in detail since they may unnecessarily obscure the understanding of the present invention. It should be understood that although exemplary embodiment of the present invention are described hereafter, the spirit of the present invention is not limited thereto and may be changed and modified in various ways by those skilled in the art.
FIG. 1 is a conceptual diagram illustrating an apparatus for shielding GPS antenna from a jamming signal according to an exemplary embodiment of the present invention. FIG. 1 is a diagram embodying an apparatus for shielding GPS antenna from a jamming signal viewed from the side. Referring to FIG. 1, an apparatus for shielding GPS antenna from a jamming signal 100 includes an antenna cover and a jamming signal shielding unit 110.
The apparatus for shielding GPS antenna from a jamming signal 100 means an apparatus for effectively coping with a jamming making it difficult to process a satellite navigation signal. The purpose of the apparatus for shielding GPS antenna from a jamming signal 100 is to receive a necessary GLS signal by shielding only a GPS jamming signal inputted at a predetermined angle.
The antenna cover 120 serves to cover an antenna 30 receiving a target GPS signal 10 by a satellite 11. The antenna cover 120 may be implemented by a radome or hemisphere-shaped transparent body.
The jamming signal shielding unit 110 is formed on at least one surface of the antenna cover 120 and serves to shield a jamming signal 20 jamming the target GPS signal 10.
The jamming signal shielding unit 110 may be configured of an electromagnetic shielding material in order to shield the jamming signal.
The electromagnetic shielding material serves to reflect or absorb the jamming signal and may be fabricated by applying an electromagnetic shielding function to fibers.
The electromagnetic shielding material to be applied in the exemplary embodiment may be fabricated by using a method of coating a shielding material or a conductive material on a fiber itself, a method of mixing a shielding material with a doped solution of a synthetic fiber, a method of forming a metal thin film on the surface of a fiber by using an electroless plating method or a metal deposition method.
The method of forming the metal thin film may use a sputtering deposition method in addition to the metal deposition, the electroless plating, or the like.
It is advantageous that the electromagnetic shielding material is an electric conductor and has a high surface area. Accordingly, a filler for electromagnetic shielding may have excellent electrical conductivity and a large specific surface area. The reason requiring the large specific surface area is caused by a skin effect in which a high-frequency electromagnetic wave interacts only on the surface of the conductor. Accordingly, a composite containing a conductive filler having a minute size in a polymer matrix is suitable for the electromagnetic shielding and the minuteness of the filler causes a surface area of a conductor much larger than a large-sized conductor.
Meanwhile, in the exemplary embodiment, the jamming signal shielding unit 110 may also be formed by painting a paint having an electromagnetic shielding function on the surface of the antenna cover 120. As described above, in the exemplary embodiment, the jamming signal shielding unit may be formed by painting the paint having the electromagnetic shielding function on one surface of the antenna cover 120 or attaching the electromagnetic shielding material to one surface of the antenna cover 120.
The jamming signal shielding unit 110 may be formed at a surface area of the antenna cover 120 enough to shield all the jamming signals 20 entering in at least one direction. When the jamming signal 20 enters from one direction, the jamming signal shielding unit 110 may be formed to be closely contact to at least one side (side part) selected from four sides (east, west, south, and north sides) or one side (side part) selected from left and right sides of the antenna cover 120 according to the entering direction of the jamming signal 20. When the jamming signal 20 enters from one direction, the jamming signal shielding unit 110 is formed at the antenna cover so that one side of the antenna cover 120 almost perpendicular to the entering direction of the jamming signal becomes the center of the jamming signal shielding unit 110 and a signal having a wave angle of 20 degrees or less is not inputted from at least one side of the left and right sides. An example of the jamming signal shielding unit 110 is shown in FIG. 2. FIG. 2 is an exemplified diagram illustrating a jamming signal shielding unit configuring the apparatus for shielding GPS antenna from a jamming signal of FIG. 1 and shows a plan view of the apparatus for shielding GPS antenna from a jamming signal according to an exemplary embodiment. Assuming that the jamming signal shielding unit 110 shields a jamming signal received from one direction, for example, only a jamming signal received from a northward direction, the jamming signal shielding unit 110 may be formed as shown in FIG. 2.
In this case, the jamming signal shielding unit 110 is formed at 1/5 to 2/3 of the entire surface area of the -10 -antenna cover 120. FIG. 3 is a 3D reference diagram illustrating the jamming signal shielding unit shown in FIG. 2.
The jamming signal shielding unit 110 may be formed at a surface area of the antenna cover 120 within a vertically predetermined angle from one side of the antenna cover 120 toward a directional value based on the directional value in which the jamming signal 20 is inputted.
The jamming signal shielding unit 110 may be formed at the surface area of the antenna cover 120 within 0° to 66° (0°«=e«=66°) from a reference side 130 of the antenna cover 120 toward the corresponding direction so that all the jamming signals entering from the corresponding direction based on a directional value (for example, due north) of the measured jamming signal can be shielded. The jamming signal shielding unit 110 may be formed at the surface area of the antenna cover 120 within 20° to 40°.
In the exemplary embodiment, the reference side means a horizontal line.
The apparatus for shielding GPS antenna from a jamming signal 100 may further include a direction display unit (not shown) . The direction display unit serves to display directions such as east, west, south, north, and the like. The direction display unit may be implemented by, -11 -for example, a compass. In this case, the jamming signal shielding unit 110 may be rotatably formed based on an acquired directional value displayed through the direction display unit whenever the directional value is acquired.
Since the jamming signal 20 may be inputted in various directions according to a situation, the jamming signal shielding unit 110 may be rotatably formed in order to respond to the jamming signal 20. In the exemplary embodiment, the jamming signal shielding unit 110 may be rotatably formed above or below the antenna cover 120.
Meanwhile, the jamming signal shielding unit 110 may be rotatably formed in a vertical direction or a horizontal direction on one surface of the antenna cover 120.
The jamming signal shielding unit 110 may be formed on the inner surface of the antenna cover 120. In the exemplary embodiment, the antenna cover 120 may be implemented by a radome for a satellite antenna. The radome is an electric insulator for protecting the antenna from an external environment such as a climate, a pressure, and the like, does not have a joint, and has strength enough to withstand an air friction and impact such as a bird, hail, or the like. Then, the radome is generally implemented in a dome shape made of a nylon-based plastic material. In some cases, the radome also attaches a metal thin film to the external surface thereof in order to -12 -improve an insulator characteristic as a measure for preventing an electrostatic charge. The jamming signal shielding unit 110 is formed on the inner surface of the antenna cover 120 in order to consider the characteristic of the antenna cover 120, that is, the radome and prevent the antenna cover from being easily damaged due to the external environment. In addition, the jamming signal shielding unit 110 may also be formed on the outer surface of the antenna cover 120. Meanwhile, the forming method may include various methods such as adhering, attaching, integrating, inserting, and the like.
The jamming signal shielding unit 110 may be formed to be attached to or detached from the antenna cover 120.
The radome is also implemented by covering a frame made of a plastic material with a nylon or rubber-based fabric.
The purpose may be achieved by forming the jamming signal shielding unit 110 so as to be attached or detached above or below the fabric.
Meanwhile, several jamming signal shielding units separated from each other may be formed at the antenna cover 120. In the exemplary embodiment, in this aspect, only the jamming signal shielding unit 110 formed on at least one side of the antenna cover 120 may be rotatably formed.
As described above, the apparatus for shielding GPS -13 -antenna from a jamming signal 100 is an apparatus proposed in order to shield a jamming signal inputted from the north while normally receiving a GPS signal by using a phenomenon 400 in which a GPS satellite does not enter within a predetermined angular radius (about 40 degrees) based on the North Star due to an orbital inclination angle in the case of a GPS and a navigation satellite, as shown in FIG. 4. FIG. 4 is a reference diagram illustrating a structural principle of the apparatus for shielding GPS antenna from a jamming signal shown in FIG. 1.
FIG. 5 is a photograph illustrating an apparatus for shielding GPS antenna from a jamming signal which is actually manufactured. The exemplary embodiment of the present invention relates to the apparatus for shielding GPS antenna from a jamming signal 100 for effectively shielding a GPS jamming signal mainly radiated from the north. However, if necessary, even in the case where the direction of the jamming signal is not north, it is possible to orient the apparatus in a jamming wave direction.
The apparatus for shielding GPS antenna from a jamming signal 100 is an apparatus attaching a hemispherical transparent body to a known GPS receiving antenna or attaching an electromagnetic shielding material (paint) or a plate having an electromagnetic shielding -14 -function to the radome at an altitude of the North Star.
That is, a circular electromagnetic shielding material (paint) or plate having an angular distance of 40 degrees is attached based on the altitude of the North Star. The apparatus for shielding GPS antenna from a jamming signal is covered by the GPS receiving antenna and may use a built-in type in order to reduce costs. However, when the direction of the jamming signal is beyond 40 degrees or more, not due north, the apparatus can be rotated from due north to an azimuth direction.
The apparatus for shielding GPS antenna from a jamming signal 100 is to cope with the jamming signal by only the effective electromagnetic shielding using an orbital characteristic of the GPS satellite without a signal processing process, thereby effectively shielding the GPS jamming signal at low cost. Further, the apparatus for shielding GPS antenna from a jamming signal 100 may mostly cope with the jamming signal radiated from north by using a built-in shielding material and may also cope with a jamming signal from the side by rotating the apparatus if necessary. Further, the apparatus for shielding GPS antenna from a jamming signal 100 may be relatively simply manufactured, easily maintained and managed, and effectively cope with the jamming at low cost as compared with an array antenna and the like. The apparatus for -15 -shielding GPS antenna from a jamming signal 100 may be applied to a diversified navigation frequency monitoring.
Next, a method for shielding GPS antenna from a jamming signal will be described by using a system for shielding GPS antenna from a jamming signal including the apparatus for shielding GPS antenna from a jamming signal 100. FIG. 6 is a flowchart illustrating a method for shielding GPS antenna from a jamming signal according to an exemplary embodiment of the present invention. Hereinafter, the method for shielding GPS antenna from a jamming signal will be described with reference to FIG. 6.
First, whether or not a jamming signal to jam a target GPS signal is inputted for every predetermined time is detected (jamming signal input detecting step, S600) When the input of the jamming signal is detected, an antenna cover to which a jamming signal shielding unit for shielding the jamming signal is attached is rotated (antenna cover rotating step, S610) In this case, the antenna cover is rotated until a receive sensitivity of the jamming signal is a reference sensitivity or less. When the receive sensitivity of the jamming signal is the reference sensitivity or less, the antenna cover is not rotated any more (S630) and when the receive sensitivity of the jamming signal is more than the reference sensitivity, the antenna cover is continuously rotated.
-16 -Meanwhile, when the input of the jamming signal is not detected, a position of the antenna cover is controlled so that the jamming signal shielding unit faces the due north direction (antenna cover position controlling step, S640) Meanwhile, the method for shielding GPS antenna from a jamming signal may also be performed as follows. First, a direction of a jamming signal to jam a target GPS signal is detected for every predetermined time (jamming signal direction detecting step) . In the exemplary embodiment, the function may be performed by a signal direction detector. After the jamming signal direction detecting step, whether the jamming signal shielding unit for shielding the jamming signal is rotatably formed on at least one surface of the antenna cover for covering an antenna receiving the target OPS signal is determined (shielding function position change determining step) . As the determined result, when the jamming signal shielding unit can be rotated, the position of the jamming signal shielding unit at the antenna cover is controlled according to the detected direction of the jamming signal. On the contrary, as the determined result, when the jamming signal shielding unit cannot be rotated, the position of the antenna cover is controlled by considering the formed position of the jamming signal shielding unit (controlling process of a shielding position) -17 -According to the exemplary embodiments of the present invention, most of the jamming signal radiated from north may be handled by using a built-in shielding material and the jamming at the side may also be handled by rotating the apparatus in a direction to remove the jamming signal as necessary.
The exemplary embodiments of the present invention may be applied to a field shielding GPS antenna from a jamming signal to jam a satellite navigation signal, for example, a GPS satellite signal. As an example, the exemplary embodiments of the present invention may be applied to a radome for a satellite antenna.
As described above, the exemplary embodiments have been described and illustrated in the drawings and the specification. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the examples illustrated herein, and it is therefore contemplated that other modifications and applications, or equivalents thereof, will occur to those -18 -skilled in the art. Many changes, modifications, variations and other uses and applications of the present construction will, however, become apparent to those skilled in the art after considering the specification and the accompanying drawings. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
-19 -
Claims (10)
- WHAT IS CLAIMED IS: 1. An apparatus for shielding OPS antenna from a jamming signal, comprising: an antenna cover covering an antenna for receiving a target GPS signal; and a jamming signal shielding unit formed on at least one third of one hemisphere surface of the antenna cover and shielding GPS antenna from a jamming signal to jam the target GPS signal.
- 2. The apparatus for shielding GPS antenna from a jamming signal of claim 1, wherein the jamming signal shielding unit is formed at a surface area of the antenna cover enough to shield all the jamming signals entering in at least one direction.
- 3. The apparatus for shielding GPS antenna from a jamming signal of claim 2, wherein the jamming signal shielding unit is formed at one direction selected from left and right directions of the antenna cover or at least one direction selected from four directions of the antenna cover according to the entering direction of the jamming signal, when the jamming signal enters in one direction.
- 4. The apparatus for shielding GPS antenna from a -20 -jamming signal of claim 1, wherein the jamming signal shielding unit is formed by painting(coating) a paint having an electromagnetic shielding function on one surface of the antenna cover or by attaching an electromagnetic shielding material to one directional surface of the antenna cover.
- 5. The apparatus for shielding GPS antenna from a jamming signal of claim 1, wherein the jamming signal shielding unit is formed at a surface area of the antenna cover within a predetermined angle from one side of the antenna cover toward a directional value based on the directional value in which the jamming signal is inputted with respect to the geographical latitude.
- 6. The apparatus for shielding GPS antenna from a jamming signal of claim 5, further comprising: a direction display unit displaying directions, wherein the jamming signal shielding unit is rotatably formed based on an acguired directional value displayed through the direction display unit whenever the directional value is acguired.
- 7. The apparatus for shielding GPS antenna from a jamming signal of claim 3, wherein only the jamming signal -21 -shielding unit formed at one direction of the antenna cover is rotatably formed.
- 8. The apparatus for shielding GPS antenna from a jamming signal of claim 1, wherein the jamming signal shielding unit is formed on an inner surface of the antenna cover.
- 9. The apparatus for shielding GPS antenna from a jamming signal of claim 1, wherein the jamming signal shielding unit is formed to be attached to or detached from the antenna cover.
- 10. A method for shielding GPS antenna from a jamming signal, comprising: detecting whether or not a jamming signal to jam a target GPS signal is inputted by shielding gradually from to 66 degrees antenna cover with respect to 36 North. ; rotating the antenna cover with a jamming signal shielding unit for shielding the jamming signal until a receive sensitivity of the jamming signal is a reference sensitivity or less, when the input is detected; and Controlling a position of the antenna cover so that the jamming signal shielding unit faces the due north direction, when the input is not detected.-22 -
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20110038709 | 2011-04-26 | ||
| KR1020110072118A KR101544832B1 (en) | 2011-04-26 | 2011-07-20 | Apparatus and method for shielding jamming signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201207300D0 GB201207300D0 (en) | 2012-06-06 |
| GB2490416A true GB2490416A (en) | 2012-10-31 |
Family
ID=46261889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1207300.3A Withdrawn GB2490416A (en) | 2011-04-26 | 2012-04-26 | GPS antenna with jamming signal shielding |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101544832B1 (en) |
| GB (1) | GB2490416A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134001A (en) * | 2014-03-28 | 2016-11-16 | 上海贝尔股份有限公司 | There is the antenna of absorption equipment |
| WO2017053523A1 (en) * | 2015-09-25 | 2017-03-30 | Qualcomm Incorporated | Integrated airborne blade antenna design |
| EP3190663A1 (en) * | 2016-01-05 | 2017-07-12 | John Mezzalingua Associates LLC | Antenna having a beam interrupter for increased throughput |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102082569B1 (en) * | 2018-07-24 | 2020-02-28 | 주식회사 티에이엔지니어링 | Jamming signal generator |
| KR102016533B1 (en) * | 2018-07-24 | 2019-09-02 | 주식회사 티에이엔지니어링 | Jamming system |
| KR101950482B1 (en) * | 2018-10-02 | 2019-02-20 | 엘아이지넥스원 주식회사 | System for controlling radar considering radio wave propagation environment and method thereof |
| CN109991629B (en) * | 2019-04-30 | 2023-05-19 | 深圳市众异科技有限公司 | Tuner down converter shielding case detection equipment |
| CN114867051B (en) * | 2022-05-07 | 2023-11-03 | 南京码锐为电子科技有限公司 | Anti-interference control system for wireless communication |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09246844A (en) * | 1996-03-07 | 1997-09-19 | Nippon Antenna Co Ltd | Tracking device |
| JP2005182655A (en) * | 2003-12-22 | 2005-07-07 | Sogo Keibi Hosho Co Ltd | Wireless alarm device |
| WO2007000067A1 (en) * | 2005-06-27 | 2007-01-04 | Eidgenössische Technische Hochschule Zürich | Method and system for acquiring azimuth information using signals provided by satellites |
| US7181247B1 (en) * | 1999-10-12 | 2007-02-20 | Lightwaves Systems Inc. | Globally referenced positioning in a shielded environment |
| US20090109115A1 (en) * | 2007-10-26 | 2009-04-30 | Eads Deutschland Gmbh | Radome with integrated plasma shutter |
| US7928924B1 (en) * | 2008-05-28 | 2011-04-19 | United States Of America As Represented By Secretary Of The Navy | Variable position antenna shield |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100854126B1 (en) | 2007-05-28 | 2008-08-26 | 한국해양연구원 | System for identifying location and heading direction using synthetic aperture radar |
-
2011
- 2011-07-20 KR KR1020110072118A patent/KR101544832B1/en not_active IP Right Cessation
-
2012
- 2012-04-26 GB GB1207300.3A patent/GB2490416A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09246844A (en) * | 1996-03-07 | 1997-09-19 | Nippon Antenna Co Ltd | Tracking device |
| US7181247B1 (en) * | 1999-10-12 | 2007-02-20 | Lightwaves Systems Inc. | Globally referenced positioning in a shielded environment |
| JP2005182655A (en) * | 2003-12-22 | 2005-07-07 | Sogo Keibi Hosho Co Ltd | Wireless alarm device |
| WO2007000067A1 (en) * | 2005-06-27 | 2007-01-04 | Eidgenössische Technische Hochschule Zürich | Method and system for acquiring azimuth information using signals provided by satellites |
| US20090109115A1 (en) * | 2007-10-26 | 2009-04-30 | Eads Deutschland Gmbh | Radome with integrated plasma shutter |
| US7928924B1 (en) * | 2008-05-28 | 2011-04-19 | United States Of America As Represented By Secretary Of The Navy | Variable position antenna shield |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106134001A (en) * | 2014-03-28 | 2016-11-16 | 上海贝尔股份有限公司 | There is the antenna of absorption equipment |
| WO2017053523A1 (en) * | 2015-09-25 | 2017-03-30 | Qualcomm Incorporated | Integrated airborne blade antenna design |
| EP3190663A1 (en) * | 2016-01-05 | 2017-07-12 | John Mezzalingua Associates LLC | Antenna having a beam interrupter for increased throughput |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101544832B1 (en) | 2015-08-17 |
| GB201207300D0 (en) | 2012-06-06 |
| KR20120121335A (en) | 2012-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2490416A (en) | GPS antenna with jamming signal shielding | |
| US9778368B2 (en) | Satellite navigation using side by side antennas | |
| US8049667B2 (en) | GPS antenna array and system for adaptively suppressing multiple interfering signals in azimuth and elevation | |
| US7688263B1 (en) | Volumetric direction-finding system using a Luneberg Lens | |
| US11594819B2 (en) | Anti-jamming and reduced interference global positioning system receiver methods and devices | |
| EP3121895A1 (en) | Alignment determination for antennas and such | |
| US8193968B1 (en) | Systems and methods for space situational awareness and space weather | |
| KR20190099692A (en) | Automatic tracking antenna of satellite wave and ground wave having 360 degree azimuth rotation structure | |
| US9337536B1 (en) | Electronically steerable SATCOM antenna | |
| US7898477B1 (en) | Volumetric direction-finding using a Maxwell Fish-Eye lens | |
| Maqsood et al. | Antennas | |
| US9121937B2 (en) | Method and apparatus for tracking a global navigation satellite system within the constraints of an indoor facility | |
| Yinusa et al. | Robust satellite navigation by means of a spherical cap conformal antenna array | |
| Frazer et al. | Orbit determination using a decametric line-of-sight radar | |
| Kurum et al. | GNSS reflectometry from smartphones: Testing performance of in-built antennas and GNSS chips | |
| JP6989829B2 (en) | 3D tilt sensing device and tilt sensing method using it | |
| RU2497079C1 (en) | Method for photonic location of aerial object | |
| JPH05183327A (en) | On-vehicle antenna | |
| US4225867A (en) | Orientation system | |
| Farhad et al. | A ubiquitous GNSS-R methodology to estimate surface reflectivity using spinning smartphone onboard a small UAS | |
| JP6495664B2 (en) | Direction calculation device, direction calculation method, direction calculation program, and moving body | |
| KR101301604B1 (en) | Jamming and Interference Screening Global Positioning System Antenna and Global Positioning System Receiver | |
| Molchanov et al. | New distributed radar technology based on UAV or UGV application | |
| CN111581309A (en) | Observation method for space debris in geosynchronous orbit zone | |
| CN113567758B (en) | Global ionosphere electron total content measurement method based on satellite-borne ADS-B and AIS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |