EP2343778A1 - Antenne - Google Patents

Antenne Download PDF

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Publication number
EP2343778A1
EP2343778A1 EP20100190097 EP10190097A EP2343778A1 EP 2343778 A1 EP2343778 A1 EP 2343778A1 EP 20100190097 EP20100190097 EP 20100190097 EP 10190097 A EP10190097 A EP 10190097A EP 2343778 A1 EP2343778 A1 EP 2343778A1
Authority
EP
European Patent Office
Prior art keywords
antenna
elements
waveguide
antenna elements
straight line
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Withdrawn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
EP20100190097
Other languages
German (de)
English (en)
Inventor
Thomas Focke
Joerg Hilsebecher
Oliver Lange
Reinhard Meschenmoser
Arne Zender
Thomas Schoeberl
Thomas Hansen
Joachim Selinger
Karl Schneider
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2343778A1 publication Critical patent/EP2343778A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0087—Apparatus or processes specially adapted for manufacturing antenna arrays
    • 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
    • H01Q19/06—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 refracting or diffracting devices, e.g. lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0043—Slotted waveguides
    • H01Q21/005—Slotted waveguides arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0037—Particular feeding systems linear waveguide fed arrays
    • H01Q21/0068—Dielectric waveguide fed arrays
    • 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
    • H01Q21/061—Two dimensional planar arrays
    • 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
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/065—Patch antenna array

Definitions

  • the invention relates to an antenna according to the preamble of patent claim 1.
  • Radar systems use antennas to radiate radar beams. Radar systems are known which scan a viewing area with a focused radar beam. This requires an antenna that radiates only in a narrow spatial direction. In addition, this spatial direction of the radiation must be changed so that the field of view can be scanned sequentially. Antennas suitable for this purpose are also called scanners.
  • antennas are known in which the emission direction depends on the frequency of the emitted radar beam. Such antennas are referred to as frequency scanners and are for example in the WO 95/20169 and the DE 10 2007 056 910.8 described.
  • frequency scanners are for example in the WO 95/20169 and the DE 10 2007 056 910.8 described.
  • previously known frequency-scanning antennas are complicated and expensive to manufacture and offer only a suboptimal directional characteristic or beam focusing.
  • the object of the present invention is therefore to provide an improved antenna. This object is achieved by an antenna having the features of claim 1. Preferred developments are specified in the dependent claims.
  • An antenna according to the invention has an antenna body with a plurality of first antenna elements, which are arranged along a first straight line.
  • a waveguide is disposed in the antenna body, which extends between the first antenna elements, wherein the first antenna elements are formed as extending between the waveguide and a surface of the antenna body openings.
  • the antenna is configured to radiate a signal in a spatial direction that depends on a frequency of the signal.
  • the antenna body to an electrically insulating material which is coated with a conductive material.
  • the antenna body of electrically insulating material is less expensive to produce than a metal antenna body.
  • the insulating material is polyetherimide or polybutylene terephthalate.
  • these plastics are inexpensive, easy to work with and mechanically robust.
  • the antenna body is produced by means of an injection molding process.
  • production by an injection molding process is simpler and less expensive than milling out the antenna body from a block of material.
  • the insulating material is a glass.
  • glass is also a cost-effective and easy-to-process material with suitable mechanical properties.
  • the antenna body is then produced by means of an embossing process.
  • embossing methods also allow cost-effective and simple production.
  • the electrically conductive material is preferably applied by means of physical vapor deposition or by means of a galvanic coating method.
  • these coating methods allow application of a very thin conductive material layer.
  • a transparent to radar radiation medium is provided in the waveguide.
  • this can protect the conductive material from corrosion.
  • the waveguide has at least one compensation structure, which is designed such that a disturbance of the waveguide caused by reflection at the first antenna elements is compensated.
  • this makes it possible to improve the emission characteristic of the antenna.
  • At least two of the first antenna elements differ from one another in such a way that they emit different amounts of power.
  • this allows the antenna allocation to be optimized, which can achieve a particularly favorable emission characteristics.
  • the power radiated by the first antenna elements interferes such that side lobe suppression of the radiated power in the far field is more than 25 dB.
  • the first antenna elements comprise an outer antenna element and a central antenna element, wherein the opening forming the outer antenna element has a first diameter, and wherein the opening forming the second antenna element has a second diameter.
  • the first and second diameters differ.
  • the antenna assignment can then be adjusted via the hole size.
  • the first antenna elements comprise a central first antenna element, wherein the power radiated by a first antenna element is approximately proportional to the square of the cosine of the norm / 2 normalized distance of this first antenna element from the central first antenna element.
  • the antenna has a lens which has a shape of a cylinder segment.
  • a longitudinal axis of the lens is parallel to the first Just oriented.
  • the lens has a dielectric material.
  • the beam emitted by the antenna beam can thereby be focused in a direction perpendicular to the pivoting direction of the antenna. This increases the gain of the antenna.
  • the lens has polyetherimide.
  • this material has proven to be particularly suitable.
  • the antenna has a plurality of second antenna elements, which are arranged outside the first straight line.
  • the second antenna elements are designed as patch elements and at least two of the second antenna element are connected to one another by a microstrip conductor.
  • the second antenna elements can then be used to detect a reflected radar signal and thereby improve the resolution of the antenna in a direction perpendicular to the pivoting direction of the antenna.
  • the second antenna elements can also be used to emit a radar signal.
  • the second antenna elements are arranged in a row which is oriented parallel to the first straight line.
  • the second antenna elements in the row are connected to one another by a microstrip conductor.
  • this arrangement is particularly suitable for the detection of the reflected signal, but can also be used to emit a radar signal.
  • the antenna comprises a second antenna body, which has a plurality of third antenna elements, which are arranged along a second straight line.
  • the second straight line is oriented parallel to the first straight line.
  • a second waveguide is arranged in the second antenna body, which extends between the third antenna elements.
  • the third antenna elements are formed as openings extending between the second waveguide and a surface of the second antenna body.
  • the second antenna body can then be used either for the detection of a reflected radar signal, whereby the resolution of the antenna improves in a direction perpendicular to the pivoting direction of the antenna, or radiated from the first and second antenna body Signals may interfere such that there is improved focusing perpendicular to the pivoting direction of the antenna.
  • At least one antenna column with a plurality of fifth antenna elements is provided, wherein the antenna column is oriented perpendicular to the first straight line and wherein the antenna column is coupled via a coupling structure to a first antenna element.
  • the antenna column then effects a focusing of the signal emitted by the antenna in a direction perpendicular to the pivoting direction of the antenna. This improves the emission characteristics of the antenna.
  • the antenna column is formed as a microstrip antenna, wherein the fifth antenna elements are formed as patch elements.
  • the antenna gaps can then be produced simply and inexpensively.
  • a substrate is provided between the antenna body and the antenna column.
  • the substrate effects electrical isolation of the antenna gaps from the antenna body.
  • the antenna column is formed as a waveguide, wherein the fifth antenna elements are formed as openings in this waveguide.
  • an antenna column designed as a waveguide also effects a focusing of the signal radiated by the antenna in a direction perpendicular to the pivoting direction of the antenna.
  • Figures 1 and 2 show in perspective view an antenna body 105 of an antenna 100.
  • the antenna body 105 has an upper part 110 and a lower part 120.
  • the upper part 110 and the lower part 120 of the antenna body 105 are connected to each other by screws.
  • FIG. 2 shows upper part 110 and lower part 120 of the antenna body 105 in unconnected state.
  • Upper part 110 and lower part 120 are each formed as a substantially flat cuboid.
  • the upper part 110 and the lower part 120 of the antenna body may be joined such that a surface of the top 110 comes into contact with a surface of the base 120.
  • the adjoining surfaces of the upper part 110 and the lower part 120 each have a meandering groove-like depression. If upper part 110 and lower part 120 are joined together, then the groove-like recesses are complementary to a waveguide 200 extending inside the antenna body 105.
  • the waveguide 200 extends between an input 210 arranged at one edge of the antenna body 105 and one located at the same edge of the antenna body 105 Output 220. Via input 210 and output 220, a high-frequency electromagnetic signal can be coupled into and out of waveguide 200.
  • the signal may, for example, have a frequency of 77 GHz.
  • the frequency can be varied, for example, by an amount of 2 GHz.
  • the upper part 110 of the antenna body 105 has a plurality of first antenna elements 300, which are arranged along a straight line.
  • the first antenna elements 300 are formed as openings extending between an outer surface of the antenna body 105 and the waveguide 200 in the interior of the antenna body 105.
  • the straight line along which the first antenna elements 300 are arranged runs parallel to the extension direction of the meandering waveguide 200.
  • each turn of the meandering waveguide 200 has an opening forming an antenna element 300.
  • the antenna elements 300 are each arranged centrally between two successive turns of the waveguide 200. However, it is also possible to arrange the antenna elements 300 at other positions of the waveguide 200, for example in the vicinity or directly at the sweeps of the meandering course of the waveguide 200.
  • the direct distance between two adjacent antenna elements 300 is selected as a function of the frequency of the signal to be radiated into the waveguide 200 and can correspond, for example, to approximately half the wavelength of the signal. Due to the meandering shape of the waveguide 200, the length of the waveguide 200 between two adjacent Antenna elements 300 larger and may, for example 5.5 times the wavelength of the signal correspond.
  • the antenna body 105 is made of an electrically insulating material coated with a conductive material.
  • the electrically insulating material may be, for example, a plastic, preferably polyetherimide or polybutylene terephthalate.
  • the antenna body 105 may be made by, for example, an injection molding method.
  • the antenna body 105 may also be made of a glass.
  • the antenna body 105 may be made by, for example, an embossing method.
  • the antenna body 105 may also be made of another insulating material.
  • On the insulating material of the antenna body 105 a coating of a conductive material is applied. This is necessary for the waveguide 200 to be suitable for transmitting an electromagnetic wave.
  • the conductive coating may consist of different layer combinations and materials. Very suitable has proven to be only a few micrometers thick coating with gold or aluminum. The coating can be applied for example by physical vapor deposition or by means of a galvanic coating process.
  • the waveguide 200 may additionally be filled with a medium that is transparent to radar radiation.
  • a medium that is transparent to radar radiation For example, low-reaction gases, Teflon, various foams, or even a vacuum are suitable for this purpose.
  • the waveguide 200 is filled with the medium, for which purpose the antenna elements 300, the input 210 and the output 220 have to be sealed with a medium transparent to radar radiation.
  • the entire antenna body 105 may be located in the desired medium.
  • FIG. 3 shows a further schematic illustration of the waveguide 200 in the interior of the antenna body 105 of the antenna 100.
  • the waveguide 200 consists of a plurality of sections oriented parallel to the x-axis, which are connected to one another in a meandering manner by sweeping, such that the waveguide 200 as a whole extends in y-direction. Direction extends.
  • the first antenna elements 300 are arranged along the first, parallel to the y-axis oriented straight lines.
  • the first antenna elements 300 designed as openings to the waveguide 200 provide a disturbance of the waveguide 200 and worsen its waveguiding properties.
  • the waveguide 200 has a plurality of compensation structures 230.
  • the compensation structures 230 are embodied as constrictions of the waveguide 200 in the vicinity of the openings forming the first antenna elements 300.
  • the compensation structures 230 are dimensioned to compensate for the effect of the first antenna elements 300 on the waveguide 200.
  • the compensation structures 230 can also be arranged elsewhere, for example at a greater distance from the first antenna elements. However, it has proven to be particularly favorable to provide the compensation structures 230 as close as possible to the first antenna elements 300.
  • the compensation structures 230 improve the radiation characteristics of the antenna 100.
  • FIG. 4 shows a further view of the upper part 110 of the antenna body 105 and the waveguide 200 disposed therein.
  • FIG. 4 shows that the openings forming the first antenna elements 300 have different diameters.
  • the openings need not be circular, but may also have another shape, for example a rectangular shape.
  • the term diameter in this context refers to the size of the opening, regardless of the exact shape of the opening.
  • An outer antenna element 330 closest to the input 210 of the waveguide 200 has a first diameter 310.
  • a central antenna element 340 lying in the center of the waveguide 200 has a second diameter 320.
  • the second diameter 320 is larger than the first diameter 310.
  • the first antenna elements 300 arranged between the central antenna element 340 and the outer antenna element 330 have diameters which lie between the first diameter 310 and the second diameter 320. In this case, the diameter of the first antenna elements 300 increases toward the center of the waveguide 200. This applies correspondingly to the first antenna elements 300 located between the output 220 of the waveguide 200 and the center of the waveguide 200.
  • the size of the holes forming the first antenna elements 300 predetermines the power radiated by the first antenna elements 300.
  • the distribution of the powers radiated by the different first antenna elements 300 is referred to as antenna assignment.
  • the design of the antenna assignment has a decisive influence on the directional characteristic of the antenna 100. In a constant occupancy, in which all first antenna elements 300 emit about the same power, resulting in a directional characteristic with only minor side lobe suppression. Improved antenna occupancy, however, can also improve sidelobe suppression.
  • the directivity of the antenna 100 in the far field results from a Fourierranformation the antenna assignment. From the desired far field of the antenna 100 can thus calculate a suitable antenna occupancy.
  • each first antenna element 300 is approximately proportional to the square of the cosine of the norm / 2 normalized distance of the respective first antenna element 300 from the central antenna element 340.
  • the normalized distance of the outer antenna element 330 from the central antenna element 340 corresponds to a value of ⁇ / 2.
  • the power radiated by the outer antenna element 330 is proportional to the square of the cosine of ⁇ / 2, thus equal to zero. Accordingly, antenna elements 300 located between the outer antenna element 330 and the central antenna element 340 have a normalized distance from the central antenna element 340 of less than ⁇ / 2.
  • the outermost antenna elements 330 which radiate a power of zero, can also be dispensed with.
  • other antenna assignments are possible.
  • sidelobe suppression of the radiated power in the far field of the antenna 100 can be greater than 25 dB.
  • the exact diameter of the openings forming the first antenna elements 300 results from the desired antenna assignment and a correction which takes into account that the high-frequency electromagnetic signal is supplied to the waveguide 200 on one side through the input 210. Therefore, antenna elements 300 further from input 210 must have a larger diameter than antenna elements 300 located near input 210.
  • FIG. 5 shows a schematic representation of a comparison of the directional characteristics of an antenna 100 with the described Compensation structures 230 and an optimized antenna assignment of the first antenna elements 300 in comparison with the directional characteristic of an antenna without the described optimizations.
  • the radiation angle of the antenna is plotted on the horizontal axis, and a normalized antenna gain is plotted on the vertical axis.
  • the first directional characteristic 400 of the non-optimized antenna has a first sidelobe suppression 410.
  • a second directional characteristic 420 of the optimized antenna 100 has a second sidelobe suppression 430. It can be seen that the second sidelobe suppression 430 of the optimized antenna 100 is better than the first sidelobe suppression 410 of the non-optimized antenna.
  • FIG. 6 shows a further perspective view of the antenna 100 with the antenna body 105.
  • the first antenna elements 300 of the antenna 100 are arranged along the first straight line, which is oriented parallel to the y-axis.
  • the radiation angle of the antenna 100 changes in the yz plane.
  • the antenna 100 radiates in a wide angle range. Therefore, in FIG. 6 a lens 500 is arranged in front of the antenna body 105.
  • the lens 500 has the shape of a cylinder segment whose longitudinal axis is oriented parallel to the y-axis. The lens 500 focuses the beam emitted by the antenna 100 in the x-direction, thereby increasing the gain of the antenna 100.
  • the signal radiated by the antenna 100 is not changed by the lens 500.
  • the lens 500 may be made of different materials. Polyetherimide has proven to be particularly suitable.
  • the antenna 500 can increase the antenna gain of the antenna 100 by up to 7 dB.
  • FIG. 7 shows a plan view of an antenna 3100 according to another embodiment.
  • the antenna 1300 in turn has first antenna elements 300 arranged along the first straight line.
  • the antenna 1300 has further antenna columns which are oriented perpendicular to the first straight line.
  • a first antenna column 3150, a second antenna column 3151, a third antenna column 3152 and a fourth antenna column 3153 are shown.
  • the antenna 3100 has as many antenna columns 3150, 3151, 3152, 3153 as first antenna elements 300.
  • Each of the antenna gaps 3150, 3151, 3152, 3153 has a plurality of fifth antenna elements 3300, which are formed as patch elements.
  • FIG. 7 shows a plan view of an antenna 3100 according to another embodiment.
  • the antenna 1300 in turn has first antenna elements 300 arranged along the first straight line.
  • the antenna 1300 has further antenna columns which are oriented perpendicular to the first straight line.
  • Each antenna column 3150, 3151, 3152, 3153 has six fifth antenna elements 1300.
  • the fifth antenna elements 3300 of an antenna column 3150, 3151, 3152, 3153 are each connected to one another via a microstrip conductor.
  • the microstrip conductor and the fifth antenna elements 3300 are made of an electrically conductive material, for example of a metal.
  • each antenna column 3150 to 3153 has a coupling web 3200, which is likewise designed as a microstrip conductor and to which the microstrip conductors connecting the fifth antenna elements 3300 are connected.
  • the coupling web 3200 of each antenna column 3150, 3151, 3152, 3153 is in each case arranged above a first antenna element 300 of the antenna 3300 and forms with this antenna element 300 a first coupling structure 3700.
  • the first coupling structure 3700 Via the first coupling structure 3700, the power radiated by the respective first antenna element 300 in FIG the coupled over the respective first antenna element 300 antenna gaps 3150, 3151, 3152, 3153 coupled. Since the antenna columns 3150, 3151, 3152, 3153 are oriented perpendicular to the first straight line, the antenna columns 3150, 3151, 3152, 3153 cause the signal emitted by the antenna 3100 to be focused perpendicular to the pivot plane of the antenna 3100.
  • the coupling structures 3700 can, as in FIG FIG.
  • the coupling structures 3700 may also be provided at the edges or any other positions of the antenna columns 3150, 3151, 3152, 3153.
  • FIG. 8 shows a plan view of an antenna 4100 according to another embodiment.
  • the antenna 4100 also has a plurality of antenna columns, which are respectively arranged above the first antenna elements 300 and oriented perpendicular to the first straight line.
  • the antenna 3100 shown in the antenna columns of the antenna 4100 have no coupling web 3200 on.
  • one of the fifth antenna elements 3100 of each antenna column is arranged above a respective first antenna element 300 and forms the first coupling structure 3700 therewith.
  • the power radiated by the respective first antenna element 300 is thereby coupled into the antenna column arranged above the respective first antenna element 300. resulting in a focus of the signal radiated by the antenna 4100 perpendicular to the pivoting direction results.
  • the positions of the coupling structures 3700 at the antenna columns can in turn be selected beliegib.
  • FIG. 9 shows a section through one of the first coupling structures 3700 of the antennas 3100 of FIG. 7 , It can be seen that a substrate 3710 is arranged between the coupling web 3200 of the antenna column 3150 and the first antenna element 300.
  • the substrate 3710 is made of an electrically insulating material and electrically insulates the antenna gap 3150 from the antenna body 105.
  • FIG. 10 shows a plan view of an antenna 5100 according to another embodiment.
  • the antenna 5100 in turn has a plurality of first antenna elements 300, which are arranged along a first straight line. Furthermore, the antenna 5100 has a plurality of antenna columns 3160, 3161, 3162, 3163, which are each oriented perpendicular to the first straight line and are each arranged above one of the first antenna elements 300. Each of the antenna columns 3160, 3161, 3162, 3163 is formed as a waveguide antenna with a plurality of sixth antenna elements 3310.
  • each of the antenna columns 3160, 3161, 3162, 3163 the respective antenna column 3160, 3161, 3162, 3163 is coupled by means of a second coupling structure 3800 to the respectively underlying first antenna element 300.
  • the power radiated by the first antenna elements 300 couples into the antenna columns 3160, 3161, 3162, 3163, resulting in focusing of the signal radiated by the antenna 5100 perpendicular to the pivoting direction of the antenna 5100.
  • FIG. 11 shows in a section through the antenna 5100 of FIG. 10 one of the second coupling structures 3800.
  • the waveguide of the antenna column 3160 is arranged vertically above the waveguide 200 of the antenna 5100.
  • the waveguide of the antenna 5100 is connected to the waveguide of the antenna gap 3160 through one of the first antenna elements 300.
  • a sixth antenna element 3310 of the antenna column 3160 is arranged.
  • the sixth antenna element 3310 may be formed as an opening or closed by a dielectric material, for example.
  • the antennas 3100, 4100, 5100 of the FIGS. 7 to 11 have the advantage that the antenna columns effect a focusing of the signal emitted by the antenna 3100, 4100, 5100 perpendicular to the respective pivoting direction, without a lens being necessary. This reduces the space required for the antenna 3100, 4100, 5100.
  • FIG. 12 shows a plan view of an antenna 1100 according to another embodiment.
  • the antenna 1100 in turn has a plurality of first antenna elements 300, which are arranged along a first straight line, which is oriented parallel to the y-axis.
  • the antenna 1100 has a plurality of second antenna elements 600, which are arranged in the x-direction next to the first antenna elements 300.
  • the second antenna elements 600 are arranged in rows that are oriented parallel to the first straight line.
  • FIG. 12 shows by way of example a first row 610 and a second row 620. However, further rows with further second antenna elements 600 may also be present.
  • the second antenna elements 600 are designed as patch elements.
  • the second antenna elements 600 of each row 610, 620 are interconnected via a microstrip line.
  • Each row 610, 620 thus forms its own patch antenna.
  • Each row 610, 620 can be connected to its own evaluation electronics.
  • the rows 610, 620 can be used to detect a reflected radar signal. Since the rows 610, 620 are arranged next to one another in the x-direction, the rows 610, 620 allow the antenna 1200 to resolve the reflected radar signal in the x-direction, ie perpendicular to the pivoting direction of the antenna 1100, as a function of the angle.
  • the antenna 1100 can thus scan the space lying in front of the antenna 1100 in the yz plane by pivoting the emitted radar beam and resolve the reflected radar signal in the xz plane as a function of the angle. As a result, the antenna 1100 achieves a good angular resolution both vertically and horizontally.
  • the second antenna elements 600 could also be used for transmission.
  • FIG. 13 shows a plan view of an antenna 1200 according to another embodiment.
  • the antenna already has the basis of FIG. 1 explained antenna body 105 with the first antenna elements 300 on.
  • the antenna 2100 has a second antenna body 2105 and a third antenna body 2106.
  • the antenna 2100 may also have further antenna bodies.
  • the second antenna body 2105 and the third antenna body 2106 correspond in structure to the first antenna body 105.
  • the second antenna body 2105 has third antenna elements 2300 and the third antenna body 2106 has fourth antenna elements 2305.
  • the first antenna elements 300, the third antenna elements 2300 and the fourth antenna elements 2305 are each oriented parallel to the y-axis. In the x-direction, the antenna elements of the various antenna bodies 105, 2105, 2106 can be arranged either directly above one another or laterally relative to one another.
  • the antenna 2100 can be used in different ways. Either the individual antenna bodies 105, 2105, 2106 can be fed by a common high-frequency source, so that the individual antenna elements 105, 2105, 2106 radiate synchronously with one another. In this case, the partial beams emitted by the individual antenna bodies 105, 2105, 2106 may interfere with each other, resulting in a focusing of the radar beam emitted by the antenna 2100 in the yz plane.
  • the function of the antenna 2100 then corresponds to that of the antennas 3100, 4100, 5100 of FIG FIGS. 7, 8 and 10 ,
  • a second way of using the antenna 1200 is to use only the first antenna body 105 for emitting radar beams and to detect the reflected radar signal by means of the second antenna body 2105 and the third antenna body 2106.
  • the antenna 2100 then reaches an angular resolution perpendicular to the pivoting direction of the antenna 2100. This corresponds to the function of the antenna 1100 of FIG FIG. 12 ,
  • FIG. 14 shows a schematic sectional view of a suitable strip conductor 700.
  • the strip conductor 700 has a first mass surface 720 and a second mass surface 730.
  • the first mass surface 720 and the second mass surface 730 are made of an electrically conductive material, for example of a metal.
  • a dielectric 740 is arranged between the first mass surface 720 and the second mass surface 730.
  • a signal conductor 710 consists of a electrically conductive material, for example of a metal.
  • the stripline 700 can be used as a waveguide for a high frequency electromagnetic wave.
  • the first mass element 720 and / or the second mass element 730 may have one or more openings serving as antenna elements.
  • the antenna elements thus formed correspond to the first antenna elements 300.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
EP20100190097 2009-12-29 2010-11-05 Antenne Withdrawn EP2343778A1 (fr)

Applications Claiming Priority (1)

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DE102009055344A DE102009055344A1 (de) 2009-12-29 2009-12-29 Antenne

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EP2343778A1 true EP2343778A1 (fr) 2011-07-13

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FR3053163B1 (fr) * 2016-06-22 2018-07-27 Universite De Rennes 1 Guide metallique d'ondes electromagnetiques a fentes, ayant une forme generale de serpentin
US11378683B2 (en) * 2020-02-12 2022-07-05 Veoneer Us, Inc. Vehicle radar sensor assemblies
US11626668B2 (en) * 2020-12-18 2023-04-11 Aptiv Technologies Limited Waveguide end array antenna to reduce grating lobes and cross-polarization
KR102666163B1 (ko) * 2021-03-04 2024-05-14 (주)스마트레이더시스템 타겟 검출용 레이더 장치

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DE102009055344A1 (de) 2011-06-30
US20120026053A1 (en) 2012-02-02

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