WO2024034680A1 - パッチアンテナ - Google Patents
パッチアンテナ Download PDFInfo
- Publication number
- WO2024034680A1 WO2024034680A1 PCT/JP2023/029349 JP2023029349W WO2024034680A1 WO 2024034680 A1 WO2024034680 A1 WO 2024034680A1 JP 2023029349 W JP2023029349 W JP 2023029349W WO 2024034680 A1 WO2024034680 A1 WO 2024034680A1
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- WIPO (PCT)
- Prior art keywords
- radiating element
- patch antenna
- dielectric
- antenna
- power feeding
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- 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.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
Definitions
- the present invention relates to a patch antenna.
- Patent Document 1 describes a patch antenna that includes two radiating elements that correspond to radio waves in different frequency bands, and in which a feeding section is disposed in each of the two radiating elements.
- the shape of the radiating element is restricted depending on the position of the feeding section, so the degree of freedom in designing the patch antenna is low.
- An example of the purpose of the present invention is to improve the degree of freedom in designing a patch antenna.
- Other objects of the invention will become apparent from the description herein.
- One aspect of the present invention includes a first radiating element, a second radiating element located so as to surround the first radiating element, and a second radiating element located between the first radiating element and the second radiating element in a plan view. and at least one power feeding section.
- One aspect of the present invention includes a dielectric, a first radiating element located on one surface of the dielectric, and a first radiating element located on the dielectric outside the first radiating element so as to surround the first radiating element.
- the patch antenna includes two radiating elements, and at least one feeding section located on the dielectric between the first radiating element and the second radiating element.
- One aspect of the present invention includes a dielectric, at least one feeder located on the dielectric, a first radiating element located on one surface of the dielectric, and a first radiating element located on the dielectric outside the first radiating element. a second radiating element located therein, and the at least one feeding section is a patch antenna located outside the second radiating element.
- the degree of freedom in designing the patch antenna can be improved.
- FIG. 2 is a plan view of the patch antenna 10 of the first embodiment. It is a perspective view of patch antenna 10 of a 1st embodiment.
- FIG. 3 is a plan view of a patch antenna 10X of a first comparative example.
- FIG. 7 is a plan view of a patch antenna 10Y of a second comparative example.
- FIG. 7 is a plan view of a patch antenna 10Z of a third comparative example. It is a graph which shows an example of the frequency characteristic of patch antenna 10X, patch antenna 10Y, and patch antenna 10Z.
- 3 is a graph showing an example of frequency characteristics of a patch antenna 10.
- FIG. 3 is a list of widths GP in patch antenna 10. It is a graph showing an example of the results when changing the width GP.
- patch antenna 10A of a 1st modification It is a perspective view of patch antenna 10B of a 2nd modification. It is a top view of patch antenna 10C of a 3rd modification. It is a perspective view of patch antenna 10D of a 4th modification. It is a perspective view of patch antenna 10E of a 5th modification. It is a top view of patch antenna 10F of a 6th modification. It is a top view of patch antenna 10G of a 7th modification. It is a top view of patch antenna 10H of the 8th modification. It is a perspective view of patch antenna 10I of a ninth modification. It is a perspective view of patch antenna 10J of a 10th modification. FIG.
- FIG. 2 is a perspective view of a state before a power feeding section 15 is assembled to a dielectric 14 in a first example of the assembly procedure of the patch antenna 10.
- FIG. FIG. 3 is a perspective view of a state after a power feeding section 15 is assembled to a dielectric 14 in a first example of the assembly procedure of the patch antenna 10.
- FIG. FIG. 3 is an enlarged perspective view of the vicinity of the pin hole 36 of the dielectric 14.
- FIG. FIG. 7 is a perspective view of a second example of the procedure for assembling the patch antenna 10 before the power feeding section 15 is assembled to the dielectric 14;
- FIG. 7 is a perspective view of a state after the power feeding part 15 is assembled to the dielectric 14, regarding a second example of the assembly procedure of the patch antenna 10;
- FIG. 3 is an explanatory diagram showing a state before the power feeding part 15 is inserted into the pin hole 36 in a first example of the method of fixing the dielectric 14 and the power feeding part 15;
- FIG. 7 is an explanatory diagram showing the state after the power feeding part 15 is inserted into the pin hole 36 in the first example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 3 is an explanatory diagram showing how the power feeding section 15 and the dielectric 14 are fixed in a first example of the method of fixing the dielectric 14 and the power feeding section 15;
- FIG. 7 is an explanatory diagram showing a state before the power feeding part 15 is inserted into the pin hole 36 in a second example of the method of fixing the dielectric 14 and the power feeding part 15;
- FIG. 7 is an explanatory diagram showing the state after the power feeding part 15 is inserted into the pin hole 36 in a second example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 7 is an explanatory diagram showing how the power feeding section 15 and the dielectric 14 are fixed in a second example of the method of fixing the dielectric 14 and the power feeding section 15;
- It is an example of a current distribution diagram in patch antenna 10H.
- 1 is a first example of a circuit diagram of a patch antenna 10.
- FIG. 2 is a second example of a circuit diagram of the patch antenna 10.
- FIG. 3 is a third example of a circuit diagram of the patch antenna 10.
- FIG. 1 is an exploded perspective view of the antenna device 100 of the first embodiment.
- FIG. 3 is a plan view of a patch antenna 20 according to a second embodiment.
- FIG. 3 is a plan view of a patch antenna 20X of a comparative example. It is a top view of patch antenna 20A of a modification.
- FIG. 2 is a plan view of an antenna device 200 according to a second embodiment.
- FIG. 3 is a plan view of an antenna device 200X of a first comparative example.
- FIG. 7 is a plan view of an antenna device 200Y of a second comparative example.
- FIG. 1 is a plan view of a patch antenna 10 according to the first embodiment.
- FIG. 2 is a perspective view of the patch antenna 10 of the first embodiment.
- each of the +X direction and the +Y direction is also a direction from one power feeding section 15 (described later) toward the center 40 of the patch antenna 10.
- the normal direction to the front surface of the first radiating element 12 is defined as the "+Z direction.”
- the opposite direction to the +X direction is the "-X direction.” Further, it may refer to both the +X direction and the -X direction, or may be simply referred to as the "X direction” to represent either the +X direction or the -X direction. Furthermore, in the same way as the -X direction and the X direction with respect to the +X direction, the "-Y direction” and “Y direction” with respect to the +Y direction, and the "-Z direction” and “Z direction” with respect to the +Z direction are also determined.
- the "front surface” of the first radiating element 12 means, when the first radiating element 12 is arranged on the dielectric 14 as described later, the surface of the first radiating element 12 that is This is the surface opposite to the surface numbered 14. Furthermore, as described later, when the first radiating element 12 is formed of a conductive pattern on a substrate, the "front surface” of the first radiating element 12 refers to the side of the substrate on which the conductive pattern is formed. It is a surface.
- the "center 40" of the patch antenna 10 is the geometric center of the outer edge shape of the patch antenna 10 (here, the outer edge shape of the dielectric material 14 described later) in a plan view as shown in FIG.
- the "outer edge portion 41" of the patch antenna 10 is a region including the outer edge of the patch antenna 10 (here, the outer edge of the dielectric 14) in the plan view.
- planar view is a planar view of the front surface of the first radiating element 12, and specifically, a view of the patch antenna 10 in the ⁇ Z direction.
- the "normal direction to the front surface” of the first radiating element 12 is a direction perpendicular to the front surface of the first radiating element 12, This is the direction from the surface on the -Z direction side (hereinafter sometimes referred to as the "back surface") to the surface on the +Z direction side (front surface). That is, the "normal direction to the front surface” of the first radiating element 12 is the direction from the back surface of the first radiating element 12 to the front surface, and the direction from the front surface to the back surface of the first radiating element 12. It will not be in both directions, but in a fixed direction.
- each of the +X direction, +Y direction, and +Z direction is represented by a line segment with an arrow in order to facilitate understanding of the direction of the patch antenna 10, etc.
- the intersection of these line segments with arrows does not mean the coordinate origin.
- the patch antenna 10 of this embodiment is arranged so that the +Z direction is the zenith direction. Therefore, in the following description, the +Z direction may be referred to as the "zenith direction” or the “upward direction,” and the -Z direction may be referred to as the “downward direction.” Furthermore, the direction parallel to the XY plane (that is, the direction parallel to the front surface of the first radiating element 12) is referred to as the "horizontal direction,” and the Z direction is referred to as the "vertical direction” or the "height direction.” There is.
- the patch antenna 10 is a planar antenna, and corresponds to, for example, radio waves in a frequency band for the Global Navigation Satellite System (GNSS).
- the patch antenna 10 of this embodiment is a so-called multi-band antenna that supports radio waves in multiple frequency bands.
- the patch antenna 10 of this embodiment supports radio waves in two frequency bands: the L1 band (1559 MHz to 1610 MHz band) and the L5 band (1164 MHz to 1214 MHz band).
- the frequency band of radio waves supported by the patch antenna 10 may be other than the combination of the two frequency bands of the L1 band and the L5 band.
- the frequency band of radio waves supported by the patch antenna 10 may be, for example, a combination of two frequency bands, the L1 band and the L2 band (1212MHz to 1254MHz band), or a combination of the two frequency bands, the L1 band, the L2 band, and the L5 band. It may be a combination of two frequency bands.
- the target frequency in each of the L1 band, L2 band, and L5 band is the center frequency in the patch antenna 10 of this embodiment.
- the center frequency of the L1 band is 1575.42 MHz
- the center frequency of the L2 band is 1227.60 MHz
- the center frequency of the L5 band is 1176.45 MHz.
- the shapes of a first radiating element 12 and a second radiating element 13, which will be described later, are designed based on a target frequency.
- the frequency bands of radio waves supported by the patch antenna 10 include the L6 band (1273 MHz to 1284 MHz band), which is a combination of the L1 band, L2 band, and L5 band with a corrected satellite signal, and the L band (1525 MHz to 1559 MHz band). It's okay if it is.
- the frequency band of the radio waves that the patch antenna 10 supports is not limited to the above-mentioned combination of specific frequency bands, but may be any combination of frequency bands. Further, the patch antenna 10 may support only radio waves in one frequency band.
- the communication standards and frequency bands of radio waves that the patch antenna 10 supports are not limited to GNSS, and may be other communication standards and frequency bands.
- the patch antenna 10 receives, for example, radio waves in a frequency band for Satellite Digital Audio Radio Service (SDARS) and radio waves in a frequency band for V2X (Vehicle to Everything: vehicle-to-vehicle communication, road-to-vehicle communication). You may respond.
- SDARS Satellite Digital Audio Radio Service
- V2X Vehicle to Everything: vehicle-to-vehicle communication, road-to-vehicle communication. You may respond.
- the patch antenna 10 includes a first radiating element 12 , a second radiating element 13 , a dielectric 14 , and a feeding section 15 .
- the first radiating element 12 and the second radiating element 13 may be collectively referred to as "radiating element 11.”
- the radiating element 11 is a conductive member placed on the dielectric 14.
- the outer edge shape of the radiating element 11 (herein, the outer edge shape of the second radiating element 13 described later) has a substantially quadrilateral shape (hereinafter referred to as "substantially quadrilateral shape") in a plan view as shown in FIG. ). Furthermore, as will be described later, the outer edge shape of the dielectric 14 is also substantially quadrilateral. The substantially quadrilateral shape formed by the outer edge shape of the radiating element 11 is smaller than the substantially quadrilateral shape formed by the outer edge shape of the dielectric material 14 .
- quadrilateral refers to a shape consisting of four sides, including, for example, a square, a rectangle, a trapezoid, a parallelogram, and the like. Further, the “substantially quadrilateral” may have, for example, at least some corners cut out diagonally with respect to the sides. Furthermore, the “substantially quadrilateral” may have a notch (concave portion) or a protrusion (convex portion) provided on a part of the side.
- the outer edge shape of the radiating element 11 is a substantially square shape with equal vertical and horizontal lengths (hereinafter sometimes referred to as “substantially square shape”). ).
- the outer edge shape of the radiating element 11 may be a substantially rectangular shape having different vertical and horizontal lengths (hereinafter sometimes referred to as “substantially rectangular shape”). Note that “substantially square” and “substantially rectangular” are shapes included in the above-mentioned “substantially quadrilateral.”
- the outer edge shape of the radiating element 11 is not limited to a substantially quadrilateral shape, and may be, for example, a circular, elliptical, polygonal, etc. shape.
- the outer edge shape of the radiating element 11 may be any shape as long as it can accommodate radio waves in a desired frequency band (here, the L1 band and L5 band for GNSS).
- the first radiating element 12 is a member located on the inner side of the radiating element 11, and the second radiating element 13 is a member located on the outer side of the radiating element 11.
- “inside” refers to the side closer to the center 40 on the surface of the patch antenna 10.
- the “outside” is the side away from the center 40 on the surface of the patch antenna 10.
- the surface of the patch antenna 10 is the surface (for example, the top surface or side surface) of the radiating element 11 or the dielectric 14 here.
- the entire first radiating element 12 is located inside the entire second radiating element 13.
- the entire second radiating element 13 is located outside the entire first radiating element 12.
- a part of the first radiating element 12 may be located outside the second radiating element 13.
- the second radiating element 13 is located so as to surround the first radiating element 12, as shown in FIGS. 1 and 2. Specifically, the second radiating element 13 surrounds the outer edge of the first radiating element 12 so as to have a gap (a slot region 30 to be described later). More specifically, in a plan view as shown in FIG. It is along the sides of a roughly square that is larger than the square shape. Further, the outer edge shape of the second radiating element 13 is approximately square.
- the outer edge shape of the first radiating element 12 and the outer edge shape of the second radiating element 13 are both approximately square.
- the outer edge shape of the first radiating element 12 and the outer edge shape of the second radiating element 13 may be different.
- the second radiating element 13 only needs to be located so as to surround the first radiating element 12.
- the outer edge shape of the first radiating element 12 is approximately square
- the outer edge shape of the second radiating element 13 is approximately square. It may be rectangular or circular.
- the second radiating element 13 is not limited to surrounding the entire outer periphery of the first radiating element 12, and a part of the enclosing shape of the second radiating element 13 may be cut out.
- the first radiating element 12 may protrude to the outside of the second radiating element 13 from a portion where a part of the shape surrounded by the second radiating element 13 is cut out.
- each of the first radiating element 12 and the second radiating element 13 is arranged on the dielectric 14.
- the first radiating element 12 and the second radiating element 13 are arranged on one surface of the dielectric 14 (here, the upper surface of the dielectric 14), as shown in FIGS. 1 and 2. It is located.
- the first radiating element 12 and the second radiating element 13 are not necessarily arranged on one surface of the dielectric 14, but the first radiating element 12 and the second radiating element 13 are arranged on different surfaces of the dielectric 14. It may be placed in
- a description will be given of a fifth modification of the patch antenna 10E shown in FIG.
- each of the first radiating element 12 and the second radiating element 13 may not be arranged only on one surface of the dielectric 14, but may be arranged over two or more surfaces of the dielectric 14. Although not shown, for example, at least one of the first radiating element 12 and the second radiating element 13 may be disposed over two surfaces, an upper surface and a side surface of the dielectric 14.
- each of the first radiating element 12 and the second radiating element 13 may be formed of a conductive pattern on the substrate.
- a slot region 30 is formed between the first radiating element 12 and the second radiating element 13, as shown in FIGS. 1 and 2.
- the slot region 30 is a region sandwiched between the first radiating element 12 and the second radiating element 13. As described above, since the first radiating element 12 and the second radiating element 13 are arranged on the dielectric 14, the dielectric 14 is exposed in the slot region 30.
- the slot region 30 is formed along the sides of a substantially square around the first radiating element 12, as shown in FIGS. 1 and 2.
- the slot region 30 is not limited to the embodiments shown in FIGS. 1 and 2, and may be formed so that at least a portion thereof has a meandering shape, a meandering shape, a curved shape, an arc shape, a zigzag shape, or a spiral shape.
- the shape may be a combination of these.
- the width GP (see FIG. 1) of the slot region 30 sandwiched between the first radiating element 12 and the second radiating element 13 is such that the first radiating element 12 and the second radiating element 13 are electrically coupled. It is defined in the range.
- the "width GP" of the slot region 30 is defined as the width GP from the outer end of the first radiating element 12 in the direction from the inside to the outside of the patch antenna 10 (or in the direction from the outside to the inside of the patch antenna 10). This is the shortest distance to the inner end of the second radiating element 13.
- the width GP of the slot region 30 is the same all around the first radiating element 12, as shown in FIG.
- the width GP of the slot region 30 does not have to be equal all around the first radiating element 12 .
- the first radiating element 12 corresponds to L1 band radio waves for GNSS
- the second radiating element 13 corresponds to L5 band radio waves for GNSS. That is, the first radiating element 12 has a shape corresponding to a desired L1 band radio wave, and the second radiating element 13 has a shape corresponding to a desired L5 band radio wave.
- the shape of the slot region 30 is also appropriately determined by the shapes of the first radiating element 12 and the second radiating element 13. Note that the first radiating element 12 may correspond to L5 band radio waves for GNSS, and the second radiating element 13 may correspond to L1 band radio waves for GNSS.
- the dielectric 14 is a member made of a dielectric material such as ceramic.
- the dielectric 14 has a substantially quadrilateral shape in plan view.
- the first radiating element 12 and the second radiating element 13 are arranged on the dielectric 14, as shown in FIGS. 1 and 2.
- a conductor pattern functioning as a ground conductor film (or ground conductor plate) is provided on the back surface of the dielectric 14.
- the shape of the dielectric 14 is not limited to a substantially quadrilateral shape, and may be, for example, a circle, an ellipse, a polygon, or the like.
- the dielectric 14 may be a dielectric substrate, or may be a solid or hollow resin member.
- the power feeding unit 15 is a conductive member including a power feeding point.
- the feed point is a location where a feeder line (not shown) feeds power to the first radiating element 12 and the second radiating element 13.
- the patch antenna 10 of this embodiment employs a configuration in which two feed lines are provided to feed the first radiating element 12 and the second radiating element 13, that is, a two-feed system. For this reason, the patch antenna 10 of this embodiment has two power feeding sections 15, as shown in FIGS. 1 and 2.
- the feeding method in the patch antenna 10 is not limited to the two-feeding method.
- a four-feeding method may be adopted.
- the patch antenna 10 employing the 4-feeding method has four feeding sections 15.
- a single feeding method may be adopted in the patch antenna 10, for example.
- the patch antenna 10 employing the single feeding method has one feeding section 15 .
- At least one feeding section 15 is arranged in a region other than the radiating element 11 (the first radiating element 12 and the second radiating element 13).
- the feeder 15 is located in the dielectric 14 between the first radiating element 12 and the second radiating element 13 (that is, the slot region 30), as shown in FIGS. 1 and 2.
- the power feeding section 15 is arranged so as to be electrically coupled to the first radiating element 12 and the second radiating element 13. Thereby, the power feeding section 15 can feed power to the first radiating element 12 and the second radiating element 13.
- the positions of the two power feeding sections 15 shown in FIGS. 1 and 2 are examples.
- the position of the power feeding unit 15 is set at a suitable location so that the first radiating element 12 and the second radiating element 13 can respond to radio waves in desired frequency bands (here, L1 band and L5 band for GNSS). It's good if it's in position.
- the two power feeding sections 15 are located in the dielectric 14 of the slot region 30.
- one of the two power feeding parts 15 may be located in the dielectric 14 of the slot region 30, and the other may be located in the first radiating element 12 or the second radiating element 13. That is, at least one power feeding section 15 may be arranged in a region other than the radiating element 11 (the first radiating element 12 and the second radiating element 13).
- the at least one power feeding section 15 is located outside the slot area 30, like a patch antenna 10C of a third modification shown in FIG. 7, which will be described later, and a patch antenna 10E of a fifth modification shown in FIG. 8B. It may be located in the dielectric 14 of.
- FIG. 3A is a plan view of the patch antenna 10X of the first comparative example.
- FIG. 3B is a plan view of the patch antenna 10Y of the second comparative example.
- FIG. 3C is a plan view of the patch antenna 10Z of the third comparative example.
- the radiating element 11X only supports radio waves in one frequency band.
- the patch antenna 10X does not have two radiating elements like the first radiating element 12 and the second radiating element 13 of the patch antenna 10 of this embodiment, but only has one radiating element.
- an antenna device compatible with multi-bands there is a so-called patch antenna stack type antenna device in which a plurality of patch antennas corresponding to radio waves of different frequency bands are stacked. Therefore, even if the patch antenna is compatible with radio waves in only one frequency band, such as the patch antenna 10X of the first comparative example, patch antennas compatible with radio waves in a frequency band different from that of the patch antenna 10X may be further stacked. With this, it is possible to configure an antenna device that supports multiple bands.
- each of the stacked patch antennas must operate, so two or more hybrid circuits are required, and the antenna device The entire structure becomes complicated. Furthermore, by stacking patch antennas, the height of the entire antenna device increases accordingly.
- the patch antenna 10 of the present embodiment has two radiating elements, the first radiating element 12 corresponding to the L1 band for GNSS and the second radiating element 13 corresponding to the L5 band for GNSS, in one.
- the structure is arranged on the dielectric body 14 and corresponds to radio waves in a plurality of frequency bands. Therefore, the entire antenna device including the patch antenna 10 can have a simple configuration. Furthermore, there is no need to stack the patch antennas 10 to accommodate radio waves in multiple frequency bands, and the overall height of the antenna device can be reduced. Furthermore, in the patch antenna 10 of the present embodiment, even if a hybrid circuit section is required, it is only necessary to arrange one hybrid circuit section, and the entire antenna device can have a simple configuration. The number of parts can also be reduced.
- the patch antenna 10Y of the second comparative example shown in FIG. 3B has two radiating elements, a first radiating element 12Y and a second radiating element 13Y, similarly to the patch antenna 10 of the present embodiment described above.
- the first radiating element 12Y corresponds to L1 band radio waves for GNSS
- the second radiating element 13Y corresponds to L5 band radio waves for GNSS.
- each of the two power feeding sections 15 directly feeds power to the first radiating element 12Y.
- the second radiating element 13Y is electrically coupled to the first radiating element 12Y.
- the patch antenna 10Y can operate so as to correspond to radio waves in a plurality of frequency bands by the first radiating element 12Y and the second radiating element 13Y.
- the patch antenna 10Z of the third comparative example shown in FIG. It has two radiating elements, the second radiating element 13Z corresponding to L5 band radio waves.
- the patch antenna 10Z of the third comparative example does not need to be a patch antenna stacked type antenna device, and the entire antenna device including the patch antenna 10Z can be simplified. It can be configured as follows.
- all of the two power feeding sections 15 are arranged on the second radiating element 13Z.
- each of the two power feeding sections 15 directly feeds power to the second radiating element 13Z.
- the first radiating element 12Z is electrically coupled to the second radiating element 13Z.
- the patch antenna 10Z can operate so as to correspond to radio waves in a plurality of frequency bands by the first radiating element 12Z and the second radiating element 13Z.
- each of the first radiating element 12Y and the second radiating element 13Y has a shape corresponding to radio waves in a desired frequency band. For this reason, as shown in FIG. 3B, if the power feeding part 15 is located at the first radiating element 12Y, the shape of the first radiating element 12Y is restricted by the position of the power feeding part 15. For example, when the shape of the first radiating element 12Y is changed in order to change the characteristics of the patch antenna 10Y, such as changing the frequency band of the corresponding radio wave, the first radiating element 12Y is The options for changing the shape are limited.
- the first radiating element 12Y includes the feeding part 15 as in the patch antenna 10Y of the second comparative example described above, the distance between the feeding part 15 and the first radiating element 12Y and the distance between the feeding part 15 and the second radiating element The difference from the distance of 13Y becomes noticeable. This may result in a significant difference in impedance between the first radiating element 12Y and the second radiating element 13Y. This difference in impedance may become noticeable as a difference between the gain in the first radiating element 12Y and the gain in the second radiating element 13Y (specifically, a difference in the value of VSWR).
- At least one feeding section 15 includes the radiating element 11 (the first radiating element 12 and the second radiating element 13), as shown in FIGS. 1 and 2. placed in an area other than Thereby, even if the shape of the first radiating element 12 or the second radiating element 13 is changed, restrictions on the position of the power feeding section 15 are suppressed. Therefore, by arranging at least one feeder 15 in a region other than the radiating element 11 (the first radiating element 12 and the second radiating element 13), the degree of freedom in designing the patch antenna 10 can be improved.
- the feeding section 15 is located in the dielectric 14 between the first radiating element 12 and the second radiating element 13 (that is, the slot region 30).
- the difference between the distance between the power feeding section 15 and the first radiating element 12 and the distance between the power feeding section 15 and the second radiating element 13 can be reduced. Therefore, the difference in impedance between the first radiating element 12 and the second radiating element 13 can be reduced, and the difference between the gain in the first radiating element 12 and the gain in the second radiating element 13 can be reduced.
- the patch antenna 10 of the present embodiment shown in FIGS. 1 and 2 at least one of the distance between the feeding section 15 and the first radiating element 12 and the distance between the feeding section 15 and the second radiating element 13 is adjusted. By doing so, the characteristics of the radio waves in the frequency band corresponding to the first radiating element 12 and the characteristics of the radio waves in the frequency band corresponding to the second radiating element 13 can be adjusted.
- the power feeding section 15 and the first radiating element 12 By reducing the distance between the elements 12 (that is, bringing the feeding section 15 closer to the first radiating element 12), it is possible to improve the characteristics of radio waves in the frequency band that the first radiating element 12 corresponds to.
- you want to improve the characteristics of radio waves in the frequency band that the second radiating element 13 corresponds to reduce the distance between the power feeding part 15 and the second radiating element 13 (by moving the power feeding part 15 to the second radiating element 13 side). By bringing the second radiating element 13 closer to the second radiating element 13, the characteristics of radio waves in the frequency band corresponding to the second radiating element 13 can be improved.
- the characteristics of radio waves in the frequency band corresponding to the first radiating element 12 and the characteristics of the second radiating element can be adjusted without changing the shapes of the first radiating element 12 and the second radiating element 13. 13 can adjust the characteristics of radio waves in the corresponding frequency band. Therefore, by locating the feed section 15 in the dielectric body 14 between the first radiating element 12 and the second radiating element 13 (that is, in the slot region 30), the degree of freedom in designing the patch antenna 10 can be further improved. Can be done.
- FIG. 4A is a graph showing an example of the frequency characteristics of patch antenna 10X, patch antenna 10Y, and patch antenna 10Z.
- the horizontal axis represents frequency
- the vertical axis represents voltage standing wave ratio (VSWR).
- the patch antenna 10X corresponds to radio waves of only one frequency band
- the patch antenna 10Y and the patch antenna 10Z correspond to radio waves of two frequency bands.
- the patch antenna 10X there is one point with good VSWR characteristics, that is, one minimum value in the graph (solid line).
- the patch antenna 10Y and the patch antenna 10Z there are two points where the VSWR characteristics are good, that is, two minimum values in the graph (broken line or one-dot chain line). In this way, patch antenna 10X, patch antenna 10Y, and patch antenna 10Z have good characteristics in a predetermined frequency band.
- FIG. 4B is a graph showing an example of the frequency characteristics of the patch antenna 10.
- the horizontal axis represents frequency
- the vertical axis represents voltage standing wave ratio (VSWR).
- the patch antenna 10 of this embodiment has good characteristics in a predetermined frequency band, similar to the patch antennas 10X to 10Z of the comparative examples. That is, the patch antenna 10 of this embodiment has good characteristics in both the target L1 band and the L5 band.
- FIG. 5A is a list of the widths GP of the patch antenna 10.
- FIG. 5B is a graph showing an example of the results when changing the width GP.
- the width GP of the patch antenna 10 of this embodiment was changed in 16 steps from 1 mm to 25.5 mm (No. 1 to No. 16). 1 ⁇ No. VSWR was calculated for each of the 16 patch antennas 10. Note that in the table shown in FIG. 5A, No. 1 ⁇ No. For each of the 16 patch antennas 10, the value of the width GP and the value obtained by converting the value of the width GP by the wavelength at the L5 band frequency (center frequency here) of the patch antenna 10 are listed.
- FIG. 5B shows calculation results (graphs) when the width GP of the patch antenna 10 is changed to the values listed in the table shown in FIG. ) are listed.
- the width GP is "greater than 0 and less than 1/10 ⁇ ". That is, the maximum width of the slot region 30 sandwiched between the first radiating element 12 and the second radiating element 13 is less than one-tenth of the wavelength of the radio wave to which the first radiating element 12 or the second radiating element 13 corresponds. This is desirable.
- the first radiating element 12 and the second radiating element 13 were arranged on one surface of the upper surface of the dielectric 14.
- the first radiating element 12 and the second radiating element 13 are not limited to being arranged on one surface of the upper surface of the dielectric 14, and the patch antenna 10A of the first modified example shown in FIG. 6A and the patch antenna 10A of the first modification shown in FIG. 6B
- the second radiating element 13 may be arranged on another surface of the upper surface of the dielectric 14, as in the patch antenna 10B of the second modified example shown. This also improves the degree of freedom in designing the patch antenna 10.
- FIG. 6A is a perspective view of a patch antenna 10A of a first modification.
- FIG. 6B is a perspective view of a patch antenna 10B of a second modification. 6A and 6B (the same applies to FIGS. 7, 8A, and 8B, which will be described later), only one power supply section 15 is illustrated.
- the second radiating element 13 of the patch antenna 10A is a surface parallel to the surface of the dielectric 14 on which the first radiating element 12 is arranged.
- the dielectric 14 is disposed on a surface of the dielectric 14 located on the ⁇ Z direction side with respect to the surface to which the dielectric material 14 is exposed.
- the upper surface of the dielectric 14 is formed such that the surface of the inner region protrudes more in the +Z direction than the surface of the outer region.
- the first radiating element 12 is arranged on the surface of the inner region of the dielectric 14, and the second radiating element 13 is arranged on the surface of the outer region of the dielectric 14.
- the second radiating element 13 of the patch antenna 10B is a surface parallel to the surface of the dielectric 14 on which the first radiating element 12 is arranged.
- the dielectric 14 is disposed on a surface of the dielectric 14 that is located on the +Z direction side of the surface to which the dielectric material 14 is applied.
- the upper surface of the dielectric 14 is formed such that the surface of the inner region is recessed in the ⁇ Z direction than the surface of the outer region.
- the first radiating element 12 is arranged on the surface of the inner region of the dielectric 14, and the second radiating element 13 is arranged on the surface of the outer region of the dielectric 14.
- the surface of the dielectric 14 on which the first radiating element 12 shown in FIGS. 6A and 6B described above is arranged and the surface of the dielectric 14 on which the second radiating element 13 is arranged are parallel to each other.
- one of the surface of the dielectric 14 on which the first radiating element 12 is arranged and the surface of the dielectric 14 on which the second radiating element 13 is arranged may be inclined with respect to the other.
- one of the first radiating element 12 and the second radiating element 13 may be inclined with respect to the other.
- the second radiating element 13 may be inclined to the XY plane, or the second radiating element 13 is parallel to the XY plane.
- the first radiating element 12 may be inclined with respect to the XY plane.
- both the first radiating element 12 and the second radiating element 13 may be inclined with respect to the XY plane, and may be parallel to or intersect with each other.
- the feeding section 15 was located between the first radiating element 12 and the second radiating element 13 (that is, the slot region 30).
- the power feeding section 15 is not limited to being located in the slot region 30, and may be located in the dielectric body 14 other than the slot region 30, as in the patch antenna 10C of the third modified example shown in FIG. This also improves the degree of freedom in designing the patch antenna 10.
- FIG. 7 is a plan view of a patch antenna 10C of a third modification.
- the feed section 15 of the patch antenna 10C is located on the dielectric 14 outside the second radiating element 13, as shown in FIG.
- the power feeding section 15 is arranged so as to be electrically coupled only to the second radiating element 13.
- the first radiating element 12 and the second radiating element 13 are arranged so as to be electrically coupled. Therefore, the power feeding section 15 can also feed power to the first radiating element 12 via the second radiating element 13 .
- both the first radiating element 12 and the second radiating element 13 are arranged on the upper surface of the dielectric 14.
- both the first radiating element 12 and the second radiating element 13 are not limited to being arranged on the upper surface of the dielectric 14, and the patch antenna 10D of the fourth modification shown in FIG. 8A and the patch antenna 10D of the fourth modification shown in FIG. 8B
- the second radiating element 13 may be disposed on a surface other than the upper surface of the dielectric 14. This also improves the degree of freedom in designing the patch antenna 10.
- FIG. 8A is a perspective view of a patch antenna 10D of a fourth modification.
- FIG. 8B is a perspective view of a patch antenna 10E of a fifth modification.
- the first radiating element 12 is arranged on the top surface of the dielectric 14, and the second radiating element 13 is arranged on the side surface of the dielectric 14.
- the second radiating element 13 is located so as to surround the first radiating element 12.
- the feed section 15 of the patch antenna 10B is located in the dielectric 14 between the first radiating element 12 and the second radiating element 13 (that is, the slot region 30), as shown in FIG. 8A.
- the first radiating element 12 is arranged on the top surface of the dielectric 14, and the second radiating element 13 is arranged on the side surface of the dielectric 14, as shown in FIG. 8B. There is.
- the second radiating element 13 is located so as to surround the first radiating element 12.
- the feed section 15 of the patch antenna 10E is located on the dielectric 14 (on the side surface of the dielectric 14) outside the second radiating element 13, as shown in FIG. 8B.
- the width GP of the slot region 30 is equal all around the first radiating element 12.
- the first radiation A notch 31 may be formed in at least one of the element 12 and the second radiating element 13. This also improves the degree of freedom in designing the patch antenna 10.
- FIG. 9A is a plan view of a patch antenna 10F of a sixth modification.
- FIG. 9B is a plan view of a patch antenna 10G according to a seventh modification.
- FIG. 9C is a plan view of the patch antenna 10H of the eighth modification.
- the second radiating element 13 is formed with a notch 31 extending in a direction parallel to the width direction of the slot region 30.
- the notch portion 31 includes a notch portion 32 in which the power feeding portion 15 is not placed, and a notch portion 33 in which the power feeding portion 15 is placed.
- both the notch 32 and the notch 33 extend outward.
- the second radiating element 13 is formed with a notch 33 that extends along the outside and in which the feeding section 15 is disposed.
- the first radiating element 12 is formed with other notches 32 and 34 extending inward.
- the power feeding section 15 is not arranged in the notch 32, and the power feeding section 15 is arranged in the notch 34.
- the notch portion 34 extends from the region of the slot region 30 where the power feeding section 15 is located.
- the first radiating element 12 is formed with a notch 32 extending inward. Furthermore, in the patch antenna 10H, a notch 35 is formed around the power feeding section 15.
- the notch 31 can be formed in at least one of the first radiating element 12 and the second radiating element 13 without being restricted by the position of the feeding section 15.
- the shape of the radiating element 11 is prevented from being restricted by the position of the feed section 15, and the degree of freedom in designing the patch antenna 10 can be improved.
- the slot region 30 is formed between the first radiating element 12 and the second radiating element 13.
- the slot region 30 is defined in various shapes depending on the shape of the outer edge of the first radiating element 12 and the shape of the inner edge of the second radiating element 13.
- the shape of the outer edge of the first radiating element 12 and the shape of the inner edge of the second radiating element 13 may be the same shape (for example, the same substantially quadrilateral shape) or may be different shapes. (For example, it may have a substantially quadrilateral shape or a substantially circular shape).
- the slot region 30 can be formed into various shapes.
- the slot area 30 may have a substantially quadrilateral outer shape as in the patch antenna 10 and the patch antennas 10A to 10G, or may have a substantially circular outer shape as in the patch antenna 10H.
- the shape may be along.
- the slot region 30 may have a shape that follows the outer shape of a circle, an ellipse, a polygon, or the like, or a shape that is a combination of these shapes.
- FIG. 10A is a perspective view of a patch antenna 10I of a ninth modification.
- FIG. 10B is a perspective view of a patch antenna 10J according to a tenth modification.
- the patch antenna 10I has a parasitic element 39, as shown in FIG. 10A.
- the parasitic element 39 is a conductive member disposed above the radiating element 11, and is a metal plate made of sheet metal.
- one parasitic element 39 is arranged above the radiating element 11 of the patch antenna 10I.
- the parasitic element 39 may be held by a holding member (not shown) surrounding the radiating element 11.
- the patch antenna 10J has a parasitic element 39, similar to the patch antenna 10I of the ninth modification described above.
- the patch antenna 10J as shown in FIG. 10B, two parasitic elements 39 are arranged above the radiating element 11 of the patch antenna 10J. Note that the two parasitic elements 39 may be held by a holding member (not shown) surrounding the radiating element 11. By having the two parasitic elements 39, the patch antenna 10J can further improve the axial ratio particularly at low elevation angles.
- the feeding section 15 is arranged in a region other than the radiating element 11 (the first radiating element 12 and the second radiating element 13). Specifically, since the feeding section 15 is located in the dielectric body 14 between the first radiating element 12 and the second radiating element 13 (that is, the slot region 30), in the patch antenna 10 of this embodiment, the feeding section 15 and the dielectric 14 must be fixed. In the following, among the steps for assembling the patch antenna 10 of this embodiment, the steps for fixing the power feeding section 15 and the dielectric 14 will be described in particular.
- FIG. 11A is a perspective view of the first example of the procedure for assembling the patch antenna 10 before the power feeding part 15 is assembled to the dielectric 14.
- FIG. 11B is a perspective view of the state after the power feeding part 15 is assembled to the dielectric 14, regarding a first example of the assembly procedure of the patch antenna 10.
- FIG. 12 is an enlarged perspective view of the vicinity of the pin hole 36 of the dielectric 14.
- a pin hole 36 through which the power feeding section 15 is inserted is previously formed in the dielectric 14. Then, the power supply part 15 is inserted into the pin hole 36, and the power supply part 15 and the dielectric body 14 are fixed with the fixing part 37, as shown in FIG. 11B.
- the fixing part 37 is an adhesive or the like here.
- the method of fixing the power feeding section 15 and the dielectric 14 is not limited to fixing with adhesive or the like.
- the fixing part 37 is not limited to an insulating member such as an adhesive, but may be a conductive member including solder or the like.
- a conductive member as a part of the fixing part 37 is placed in advance around the pin hole 36 of the dielectric 14, and the power feeding part 15 and the conductive member are further connected to each other. It may be fixed using solder, which is a part of the fixing part 37.
- the conductive member shown in FIG. 12 may be omitted.
- FIG. 13A is a perspective view of the second example of the procedure for assembling the patch antenna 10 before the power feeding part 15 is assembled to the dielectric 14.
- FIG. 13B is a perspective view of the state after the power feeding part 15 is assembled to the dielectric 14, regarding a second example of the assembly procedure of the patch antenna 10.
- the power feeding section 15 may be fixed in advance to the substrate 38 on which the patch antenna 10 is mounted. Then, as shown in FIG. 13B, the power feeding section 15 may be inserted into the pin hole 36 so as to cover the patch antenna 10 on the substrate 38 side.
- the power feeding section 15 is fixed in advance, so that the workability when assembling the patch antenna 10 can be improved. Further, since the power feeding section 15 is fixed to the substrate 38 in advance, positioning when placing the patch antenna 10 on the substrate 38 can be facilitated.
- the power feeding section 15 and the dielectric body 14 are fixed by the fixing section 37 formed of an adhesive or a conductive member.
- the fixing method using the fixing part 37 will be described in detail below.
- the fixing method described below will be described as a fixing method in the first example of the assembly procedure of the patch antenna 10 shown in FIGS. 11A, 11B, and 12 described above. It can also be applied to the fixing method in the second example of the assembly procedure.
- FIG. 13C is an explanatory diagram showing the state before the power feeding part 15 is inserted into the pin hole 36 in the first example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 13D is an explanatory diagram showing the state after the power feeding part 15 is inserted into the pin hole 36 in the first example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 13E is an explanatory diagram showing how the power feeding section 15 and the dielectric 14 are fixed in the first example of the method of fixing the dielectric 14 and the power feeding section 15.
- the power feeding section 15 inserted into the pin hole 36 of the dielectric 14 has a head 51 and a body 52.
- the head 51 is a part located on the +Z direction side of the power feeding part 15, and when the power feeding part 15 is inserted into the pin hole 36 of the dielectric 14 (the state shown in FIG. 13D, which will be described later), the head 51 Exposure on the direction side.
- the body portion 52 is a portion located on the ⁇ Z direction side of the power feeding portion 15 and is inserted into the pin hole 36 of the dielectric body 14.
- a pin hole 36 extending in the Z direction is formed in the dielectric 14.
- the inner diameter of the pin hole 36 is constant in the Z direction and is larger than the outer diameter of the body section 52 of the power supply section 15 . is smaller than the outer diameter of the head 51 of. Therefore, as shown in FIG. 13D, the body 52 can be inserted into the pin hole 36, and in the state where the body 52 is inserted into the pin hole 36, the end of the head 51 on the +Z direction side is , located above (on the +Z direction side) the surface of the dielectric 14 on the +Z direction side.
- the fixing part 37 is arranged to cover the head 51, as shown in FIG. 13E.
- the end of the head 51 on the +Z direction side is located above the upper surface 53 of the dielectric 14 (the surface on the +Z direction side).
- the fixing portion 37 that covers the head 51 is located further above the position of the head 51 (on the +Z direction side).
- the fixing part 37 is also disposed between the lower surface of the head 51 (the surface on the -Z direction side) and the upper surface 53 (the surface on the +Z direction side) of the dielectric 14 facing the head 51, and is An adhesion surface 55 between the dielectric material 15 and the dielectric material 14 is formed.
- the head 51 In the state in which the body 52 is inserted into the pin hole 36 (the state shown in FIG. 13D), the head 51 is located above (the +Z direction side) the surface of the dielectric 14 in the +Z direction (the upper surface 53 of the dielectric 14). ), the adhesive surface 55 is not formed on the side surface of the head 51.
- FIG. 13F is an explanatory diagram showing the state before the power feeding part 15 is inserted into the pin hole 36 in the second example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 13G is an explanatory diagram showing the state after the power feeding part 15 is inserted into the pin hole 36 in the second example of the method of fixing the dielectric 14 and the power feeding part 15.
- FIG. 13H is an explanatory diagram showing how the power feeding section 15 and the dielectric 14 are fixed in a second example of the method of fixing the dielectric 14 and the power feeding section 15.
- the head accommodating section 54 may be formed in the +Z direction side part of the pin hole 36.
- the head accommodating portion 54 is a portion where the inner diameter of the pin hole 36 is enlarged, and the inner diameter of the head accommodating portion 54 is larger than the outer diameter of the head 51 of the power feeding portion 15 .
- the body part 52 can be inserted into the pin hole 36, and the head part 51 is lower than the +Z direction side surface of the dielectric body 14 (the upper surface 53 of the dielectric body 14).
- the power feeding section 15 can be inserted through the pin hole 36 so as to be located on the side.
- the entire head 51 is located below the +Z direction side surface of the dielectric 14 (the upper surface 53 of the dielectric 14), but a part of the head 51 is located in the +Z direction of the dielectric 14. It may be located below the surface on the direction side (the upper surface 53 of the dielectric 14).
- the fixing part 37 is arranged to cover the head 51, as shown in FIG. 13H.
- the fixing portion 37 that covers the head 51 can also be placed lower (on the ⁇ Z direction side) than in the first example.
- the outline of the fixing portion 37 of the first example is shown by a broken line.
- the fixing portion 37 covering the head 51 is located below the upper surface 53 of the dielectric 14 . That is, the fixing portion 37 is entirely accommodated in the head accommodating portion 54. However, a part of the fixing part 37 may be accommodated in the head accommodating part 54.
- the fixing part 37 is located between the lower surface of the head 51 (the surface on the -Z direction side) and the bottom surface of the head accommodating part 54, which faces the lower surface of the head 51. is also arranged, and an adhesive surface 55 between the power feeding section 15 and the dielectric 14 is formed.
- the fixing part 37 is also provided between the side surface of the head 51 and the inner surface of the head accommodating part 54 that faces the side surface of the head 51.
- An adhesive surface 56 is also formed on the side surface of the head 51.
- the power feeding unit 15 is connected to at least one of the first radiating element 12 and the second radiating element 13. arranged to be electrically coupled.
- the electrical effects of the power feeding section 15 on the first radiating element 12 and the second radiating element 13 will be explained using the patch antenna 10H of the eighth modification as an example.
- FIG. 14A is an example of a current distribution diagram in the patch antenna 10H.
- FIG. 14B is another example of a current distribution diagram in the patch antenna 10H.
- FIG. 14A the current distribution on the top surface of the patch antenna 10H is visually represented.
- FIG. 14B regarding the current distribution on the upper surface of the patch antenna 10H, particularly the direction of the current is visually represented.
- an example of a region where the current is strong is surrounded by a broken line.
- region A1 an example of the region where the current is strong in the first radiating element 12
- region A2 an example of a region where the current is strong in the second radiating element 13
- the A1 region and the A2 region are also regions with a high degree of electrical coupling.
- the current is strong in, for example, the A1 region and the A2 region located on both sides of the slot region 30. That is, the power feeding section 15 feeds power to both the first radiating element 12 and the second radiating element 13 via the slot region 30. Therefore, the power feeding section 15 is electrically coupled to the first radiating element 12 and the second radiating element 13, and is arranged so as to act on both the radiating elements (the first radiating element 12 and the second radiating element 13) simultaneously. has been done.
- the case of the patch antenna 10H was taken up as an example of the electrical effect of the power feeding unit 15 on the first radiating element 12 and the second radiating element 13.
- the power feeding section 15 is electrically coupled to the first radiating element 12 and the second radiating element 13, and both radiating elements (first radiating element 12 and second radiating element 13) simultaneously.
- the patch antenna 10 of this embodiment employs a two-feeding system.
- a power feeding circuit of the patch antenna 10 employing such a two-feeding method will be described.
- FIG. 15A is a first example of a circuit diagram of the patch antenna 10.
- FIG. 15B is a second example of a circuit diagram of the patch antenna 10.
- FIG. 15C is a third example of a circuit diagram of the patch antenna 10.
- FIGS. 15A to 15C the route of the signal sent from the antenna input section 18A or 18B to the antenna output section 18C is shown by a solid arrow. Further, the route of the signal sent from the antenna input section 18A or 18B to the antenna output section 18D is indicated by a broken arrow.
- FIG. 15C an example is shown in which a hybrid coupler 19 is used.
- signals input from the antenna input section 18A or the antenna input section 18B and having mutually different phases by 90 degrees are sent to the antenna output section 18C or the antenna output section 18D.
- the patch antenna 10 supports desired circularly polarized waves that correspond to the GNSS frequency band, for example.
- the patch antenna 10 of the present embodiment described above is compatible with radio waves in the GNSS frequency band, for example.
- the patch antenna 10 may be compatible with radio waves in the SDARS frequency band, for example.
- Radio waves in the frequency band for GNSS are right-handed circularly polarized waves
- radio waves in the frequency band for SDARS are left-handed circularly polarized waves.
- the first radiating element 12 may correspond to right-handed circularly polarized waves
- the second radiating element 13 may correspond to left-handed circularly polarized waves
- the first radiating element 12 may correspond to left-handed circularly polarized waves
- the second radiating element 13 may correspond to right-handed circularly polarized waves.
- the patch antenna 10 can support radio waves of any plurality of frequency bands, and the entire antenna device including the patch antenna 10 can have a simple configuration.
- FIG. 16 is an exploded perspective view of the antenna device 100 of the first embodiment.
- FIG. 16 shows a diagram in which a case 1, which will be described later, is removed from the antenna device 100 and moved to the +Z direction side. Further, in FIG. 16, illustrations of a holding member that holds a parasitic element 39 of a patch antenna 10K, which will be described later, and a holding member that holds an antenna 50, which will be described later, are omitted.
- the antenna device 100 of this embodiment is a so-called vehicle-mounted antenna device, and is placed on the roof of a vehicle, for example.
- the part of the vehicle where the antenna device 100 is arranged can be changed as appropriate depending on the environmental conditions such as the intended communication target.
- the antenna device 100 may be placed in various positions, such as the upper part of a vehicle dashboard, a bumper, a license plate attachment part, a pillar part, and a spoiler part.
- In-vehicle here means that it can be mounted on a vehicle, so it is not limited to things that are attached to a vehicle, but also includes things that are brought into a vehicle and used within the vehicle.
- the antenna device 100 of the present embodiment is used for a "vehicle” that is a vehicle with wheels, the present invention is not limited to this. It may also be used for moving objects such as aircraft, agricultural machinery, and ships.
- the +X direction is the front direction as seen from the driver's seat of the vehicle in which the antenna device 100 is arranged
- the +Y direction is the right direction as seen from the driver's seat of the vehicle in which the antenna device 100 is arranged
- the +Z direction is the upward direction (zenith direction) seen from the driver's seat of the vehicle in which the antenna device 100 is arranged.
- the external shape of the antenna device 100 of this embodiment (that is, the external shape of case 1 described later) is a fin shape (that is, a shark fin shape) that rectifies the wind when the vehicle is running and reduces fluid resistance.
- the external shape of the antenna device 100 of this embodiment is tapered at the front and becomes wider in the left and right directions toward the rear.
- the external shape of the antenna device 100 of this embodiment gradually becomes narrower in the left and right widths upward from the mounting surface to the vehicle.
- the antenna device 100 of the present embodiment has a streamlined external shape that becomes relatively narrower and lower in height toward the front end, and the side surfaces are also curved inward.
- the external shape of the antenna device 100 is not limited to this, and can be made into various shapes such as a cube, a rectangular parallelepiped, a cone, a pyramid, and a sphere, and these shapes may be combined.
- the antenna device 100 may be housed in a cavity between the roof panel of the vehicle and the roof lining on the ceiling surface of the vehicle interior, for example.
- the roof panel of the vehicle is made of, for example, insulating resin so that the antenna device 100 can respond to radio waves.
- the antenna device 100 which is housed in a cavity between the roof panel of the vehicle and the roof lining on the ceiling surface of the vehicle interior, is fixed to the roof lining made of insulating resin with, for example, screws.
- the antenna device 100 housed in the cavity may be fixed to the frame, roof panel, etc. of the vehicle.
- the roof panel of the vehicle may be made of metal or carbon fiber reinforced plastic instead of resin. When the roof panel of the vehicle is made of metal, for example, measures may be taken to ensure the directivity of the antenna included in the antenna device 100.
- the antenna device 100 includes a case 1, a base 2, a patch antenna 10K, and an antenna 50.
- the case 1 is a member that forms a housing space for the patch antenna 10K and the antenna 50 together with the base 2.
- the case 1 constitutes the upper side of the antenna device 100.
- the case 1 is formed of an insulating resin material.
- the case 1 may be formed of a material other than the insulating resin material and which transmits radio waves.
- the case 1 may be composed of a portion made of an insulating resin material and a portion made of another material that transmits radio waves, or these materials may be freely combined.
- the case 1 is fixed to the base 2 with screws (not shown).
- the case 1 is not limited to being fixed with screws, and may be fixed to the base 2 by snap-fitting, welding, adhesion, or the like.
- the base 2 is a member that forms a housing space for the patch antenna 10K and the antenna 50 together with the case 1.
- the base 2 constitutes the bottom surface of the antenna device 100.
- the base 2 has an insulating base 3 and a metal base 4, as shown in FIG.
- the insulating base 3 is a plate-shaped member made of an insulating resin material.
- the insulating base 3 may be formed of a material other than resin material as long as it is insulative, and may have a shape other than a plate shape.
- a metal base 4 is attached to the insulating base 3 with screws (not shown).
- the metal base 4 is a member that functions as a ground for the antenna device 100.
- the metal base 4 is, for example, a plate-like member made of metal, and is a die-cast product of aluminum alloy or the like.
- the metal base 4 may have a shape other than a plate shape as long as it is a metal member that functions as a ground, and may be made of a sheet metal.
- a substrate 5 to which the patch antenna 10K is connected and a substrate 7 to which the antenna 50 is connected are arranged on the metal base 4. In other words, the patch antenna 10K is placed on the metal base 4 via the substrate 5, and the antenna 50 is placed on the metal base 4 via the substrate 7.
- the metal base 4 When the antenna device 100 is placed on the roof of a vehicle, the metal base 4 and the roof are electrically connected. Thereby, the metal base 4 functions as a ground for the patch antenna 10K and the antenna 50 that the antenna device 100 has.
- the metal base 4 is an integrated metal base on which the substrate 5 and the substrate 7 are placed, but it is configured as a separate metal base with the metal base on which the substrate 5 is placed and the metal base on which the substrate 7 is placed. It's okay if it's done. Even when configured as such a separate metal base, it functions appropriately as a ground for the patch antenna 10K and the antenna 50.
- the antenna device 100 has the base 2 as a member that constitutes the bottom surface of the antenna device 100. Furthermore, it has been explained that the base 2 includes the insulating base 3 and the metal base 4 functioning as a ground. However, the configuration of the base 2 is not limited to the above case.
- the base 2 may have only the metal base 4, or may have an insulating base 3, a metal base 4, and another metal base, or a metal plate instead of the metal base. It's okay.
- the base 2 may be composed of an insulating base 3 and a metal plate in place of the metal base.
- the above-mentioned members can be freely combined as the members forming the bottom surface of the antenna device 100 and the members functioning as a ground.
- the case 1 and the base 2 accommodate the patch antenna 10K and the antenna 11.
- the case 1 and the base 2 form an accommodation space that accommodates at least the patch antenna 10K and the antenna 50.
- the case 1 and the base 2 may accommodate members other than the patch antenna 10K and the antenna 50.
- the case 1 and the base 2 constitute the housing of the shark fin antenna.
- the patch antenna 10K has two parasitic elements 39 arranged above the radiating element 11 of the patch antenna 10K.
- each of the parasitic elements 39 is formed in a shape in which the inner region is hollowed out, as shown in FIG.
- the feeding section 15 is located in a region other than the radiating element 11 (here, the slot region 30), thereby improving the degree of freedom in designing the patch antenna 10K. Can be done.
- the patch antenna 10K is arranged on a substrate 5 attached to the upper surface of the metal base 4, as shown in FIG.
- the patch antenna 10K is electrically connected to the substrate 5 through the power feeding section 15.
- the patch antenna 10K is connected to the coaxial cable 6 shown in FIG. 16 via a matching circuit (not shown) mounted on the board 5.
- the antenna 50 is an antenna for mobile communication, and is used, for example, in V2X (Vehicle to Everything: vehicle-to-vehicle communication, road-to-vehicle communication). Further, the antenna 50 is an antenna that supports linearly polarized radio waves. For example, linearly polarized waves may be called vertically polarized waves when the plane of polarization is perpendicular to the earth, and called horizontally polarized waves when the plane of polarization is horizontal to the earth. Further, the antenna 50 is a collinear array antenna. However, the antenna 50 may be, for example, a monopole antenna, a sleeve antenna, a dipole array antenna, a slot array antenna, a Yagi antenna, a patch antenna, or the like.
- the antenna 50 is arranged on the substrate 7 attached to the upper surface of the metal base 4, as shown in FIG.
- the antenna 50 is electrically connected to the substrate 7 at a power feeding section (not shown).
- the antenna 50 is connected to the coaxial cable 8 shown in FIG. 16 via a matching circuit (not shown) mounted on the substrate 7. Circuit elements and electronic components other than the matching circuit may be mounted on the substrate 7.
- the outer periphery of the matching circuit side (lower side) of the substrate 7 is electrically connected to the ground on the antenna 50 side through a through hole, a via hole, or the like. Further, the outer periphery of the substrate 7 on the matching circuit side is subjected to a conductive surface treatment such as a solder liberator or gold plating.
- the antenna device 100 has the antenna 50 in addition to the patch antenna 10K, but it may have an antenna other than the antenna 50, or it may have only the patch antenna 10K. .
- FIG. 17 is a plan view of the patch antenna 20 of the second embodiment.
- the patch antenna 20 includes a radiating element 21, a dielectric 24, a first feeding section 26, and a second feeding section 27.
- the first power feeding section 26 and the second power feeding section 27 may be collectively referred to as the "power feeding section 25.”
- the radiating element 21 is a conductive member placed on the dielectric 24.
- the radiating element 21 supports only radio waves in one frequency band.
- the radiating element 21 does not have two radiating elements like the first radiating element 12 and the second radiating element 13 of the patch antenna 10 of the first embodiment described above, but has only one radiating element.
- the radiating element 21 may include a first radiating element and a second radiating element, and may correspond to radio waves in a plurality of frequency bands.
- the dielectric 24 is a member made of a dielectric material such as ceramic, similar to the patch antenna 10 of the first embodiment described above.
- the dielectric 24 has a substantially quadrilateral shape in plan view.
- the shape of the dielectric body 24 is not limited to a substantially quadrilateral shape, and may be, for example, a circle, an ellipse, a polygon, or the like. Details of the dielectric body 24 other than those described above are the same as those of the dielectric body 14 of the patch antenna 10 of the first embodiment described above, and therefore a description thereof will be omitted.
- Each of the first power supply section 26 and the second power supply section 27 is a conductive member including a power supply point.
- each of the first feeding section 26 and the second feeding section 27 is arranged on the radiating element 21, unlike the patch antenna 10 of the first embodiment described above.
- at least one of the first feeding section 26 and the second feeding section 27 is arranged in a region other than the radiating element 21, for example, in the region of the dielectric 24. It's okay.
- the first feeding section 26 is located on the first diagonal line 43 of the radiating element 21 in a plan view as shown in FIG. It is located in Further, the second power feeding section 27 is located on the second diagonal line 44 in the radiating element 21 .
- first power feeding section 26 being “located on the first diagonal line 43” means that the first diagonal line 43 intersects at least a portion of the first power feeding section 26.
- second power feeding section 27 is “located on the second diagonal line 44” means that the second diagonal line 44 intersects at least a portion of the second power feeding section 27.
- first diagonal line 43" and the “second diagonal line 44" are diagonals of the substantially quadrilateral radiating element 21, as shown in FIG.
- the center 40 of the patch antenna 20 is the center of the substantially quadrilateral radiating element 21 .
- the center 40 of the patch antenna 20 is also the intersection of the first diagonal 43 and the second diagonal 44 .
- the first diagonal line 43 and the second diagonal line 44 may be diagonal lines of the substantially quadrilateral dielectric body 24.
- the center 40 of the patch antenna 20 is the center of the substantially quadrilateral dielectric 24.
- the distance DC1 between the center 40 and the first power feeding section 26 may not be equal to the distance DC2 between the center 40 and the second power feeding section 27.
- the first feeding section 26 is located closer to the corner 42 than to the center 40 on the first diagonal 43.
- the second power feeding section 27 is located closer to the corner 42 than to the center 40 on the second diagonal line 44 .
- the first power feeding section 26 or the second power feeding section 27 may be located closer to the center 40 than to the corner 42.
- FIG. 18 is a plan view of a patch antenna 20X of a comparative example.
- the patch antenna 20X of the comparative example has the same radiating element 21 and dielectric material 24 as the patch antenna 20 of this embodiment. However, in the patch antenna 20X, the first power feeding section 26 and the second power feeding section 27 are located on the first axis 16 and the second axis 17, respectively, which are different from the first diagonal line 43 and the second diagonal line 44.
- first axis 16 is an axis that passes through the center 40 and is parallel to the first side 45 of the substantially quadrilateral radiating element 21.
- second axis 17 is an axis that passes through the center 40 and is parallel to the second side 46 adjacent to the first side 45.
- the first axis 16 and the second axis 17 are mutually orthogonal axes.
- the first feeding section 26 and the second feeding section 27 are located on mutually orthogonal axes (the first axis 16 and the second axis 17), so that the circularly polarized wave of the patch antenna 20X is The phase difference is 90 degrees.
- the distance DB between the two power feeding parts (the first power feeding part 26 and the second power feeding part 27), and it is difficult to ensure isolation between the two power feeding parts. is difficult.
- the distance DB between (the first power feeding section 26 and the second power feeding section 27) has a maximum distance of the length LB of a straight line connecting the first center 47 and the second center 48.
- the patch antenna 20 of this embodiment as shown in FIG. DA can be made longer than the length LB of the straight line connecting the first center 47 and the second center 48 (that is, the maximum value of the distance DB in the patch antenna 20X of the comparative example). This allows a sufficient distance between the two power feeding sections (the first power feeding section 26 and the second power feeding section 27), and provides isolation between the first power feeding section 26 and the second power feeding section 27. Can be easily secured.
- FIG. 19 is a plan view of a modified patch antenna 20A.
- the patch antenna 20A for example, as shown in FIG. 19, a four-feeding method may be adopted.
- the patch antenna 20A employing the 4-feeding method has four feeding sections 25. That is, the patch antenna 20A further includes a third power feeding section 28 and a fourth power feeding section 29 in addition to the first power feeding section 26 and the second power feeding section 27.
- the third power feeding section 28 is located on the first diagonal line 43
- the fourth power feeding section 29 is located on the second diagonal line 44.
- the first power feeding section 26 and the third power feeding section 28 are located at positions symmetrical to each other with respect to the second diagonal line 44. Further, the second power feeding section 27 and the fourth power feeding section 29 are located at positions that are symmetrical to each other with respect to the first diagonal line 43. However, the first power feeding section 26 and the third power feeding section 28 do not have to be symmetrical to each other with respect to the second diagonal line 44, and the second power feeding section 27 and the fourth power feeding section 29 are They do not have to be symmetrical to each other with respect to the diagonal line 43.
- FIG. 20 is a plan view of the antenna device 200 of the second embodiment.
- the antenna device 200 includes the patch antenna 20 described above, the patch antenna 20, and the antenna 50. At this time, the first distance D1 between the first power feeding section 26 and the antenna 50 and the second distance D2 between the second power feeding section 27 and another antenna 50 are approximately equal.
- the antenna device 200 of the present embodiment described above can suppress the size of the antenna device 200 while suppressing the influence on the characteristics of the patch antenna 20. This point will be explained with reference to the antenna device 200X of the first comparative example shown in FIG. 21A and the antenna device 200Y of the second comparative example shown in FIG. 21B.
- FIG. 21A is a plan view of the antenna device 200X of the first comparative example.
- FIG. 21B is a plan view of the antenna device 200Y of the second comparative example.
- the antenna device 200X includes the patch antenna 20X of the comparative example described above and an antenna 50 different from the patch antenna 20X. At this time, in the antenna device 200X, as shown in FIG. 21A, a first distance DX1 between the first power feeding section 26 and another antenna 50, and a second distance DX2 between the second power feeding section 27 and another antenna 50. And it's different. As a result, the first power feeding section 26 and the second power feeding section 27 receive different degrees of electrical interference from the antenna 50, which affects the characteristics of the patch antenna 20X.
- the antenna device 200Y includes a patch antenna 20Y and an antenna 50 different from the patch antenna 20Y.
- the patch antenna 20Y is a patch antenna obtained by rotating the patch antenna 20X by 90 degrees on the XY plane.
- the size of the patch antenna 20Y rotated by 90 degrees in the Y direction becomes larger than the size of the patch antenna 20X of the first comparative example in the Y direction.
- the first distance D1 between the first feeding section 26 and another antenna 50 and the second distance D1 between the second feeding section 27 and another antenna 50 are The distance D2 is approximately equal. Furthermore, the size of the patch antenna 20 in the Y direction can be suppressed. That is, in the antenna device 200 of this embodiment, the size of the antenna device 200 can be suppressed while suppressing the influence on the characteristics of the patch antenna 20.
- Aspect 1 includes a first radiating element 12, a second radiating element 13 located so as to surround the first radiating element 12, and a second radiating element 13 located between the first radiating element 12 and the second radiating element 13 in a plan view. At least one power feeding unit 15 is provided.
- the degree of freedom in designing the patch antenna can be improved.
- At least one feeder 15 is located in a slot region 30 formed between the first radiating element 12 and the second radiating element 13.
- the degree of freedom in designing the patch antenna can be improved.
- Aspect 3 includes a dielectric 14, a first radiating element 12 located on one surface of the dielectric 14, and a second radiating element 12 located on the dielectric 14 outside the first radiating element 12 so as to surround the first radiating element 12. It includes a radiating element 13 and at least one power feeding part 15 located in a dielectric 14 between the first radiating element 12 and the second radiating element 13.
- the degree of freedom in designing the patch antenna can be improved.
- At least one feeder 15 is located in a slot region 30 formed between the first radiating element 12 and the second radiating element 13.
- the degree of freedom in designing the patch antenna can be improved.
- Aspect 5 includes a dielectric 14 , at least one feeder 15 located on the dielectric 14 , a first radiating element 12 located on one surface of the dielectric 14 , and a dielectric 14 on the outside of the first radiating element 12 . a second radiating element 13 located therein, and at least one feed section 15 is located outside the second radiating element 13 .
- the degree of freedom in designing the patch antenna can be improved.
- the maximum width of the region sandwiched between the first radiating element 12 and the second radiating element 13 is less than one-tenth of the wavelength of the radio wave to which the first radiating element 12 or the second radiating element 13 corresponds.
- the degree of freedom in designing the patch antenna can be improved.
- At least one feed section 15 is electrically coupled to the first radiating element 12 and the second radiating element 13.
- the degree of freedom in designing the patch antenna can be improved.
- the degree of freedom in designing the patch antenna can be improved.
- At least one of the first radiating element 12 and the second radiating element 13 is formed with a notch 31 extending in a direction parallel to the width direction of the slot region 30.
- the degree of freedom in designing the patch antenna can be improved.
- the notches 33 to 35 extend from a region in the slot region 30 where at least one power feeding section 15 is located.
- the degree of freedom in designing the patch antenna can be improved.
Landscapes
- Waveguide Aerials (AREA)
Abstract
Description
図1は、第1実施形態のパッチアンテナ10の平面図である。図2は、第1実施形態のパッチアンテナ10の斜視図である。
まず、図1及び図2を参照しつつ、パッチアンテナ10における方向等(X方向,Y方向及びZ方向)を定義する。
次に、上述した図1及び図2を再び参照しつつ、本実施形態のパッチアンテナ10の概要を説明する。
次に、図3A~図3Cに示される比較例のパッチアンテナ10X~10Zを参照しつつ、本実施形態のパッチアンテナ10の特徴についてさらに説明する。
次に、図4A及び図4Bを参照しつつ、比較例のパッチアンテナ10X~10Zの周波数特性と、本実施形態のパッチアンテナ10の周波数特性とを説明する。
次に、図5A及び図5Bを参照しつつ、本実施形態のパッチアンテナ10におけるスロット領域30の幅GPの検証について説明する。
<概要>
次に、本実施形態のパッチアンテナ10の組立手順について説明する。上述した比較例のパッチアンテナ10X~10Zでは、給電部15が放射素子(11X,11Y,11Z)に配置されていた。このため、比較例のパッチアンテナ10X~10Zでは、給電部15と放射素子(11X,11Y,11Z)とを半田付けで導通させることにより、給電部15を放射素子(11X,11Y,11Z)に固定することになる。
上述したように、給電部15と誘電体14とは、接着剤等、又は、導電性の部材により形成される固定部37により固定される。以下では、この固定部37による固定方法について詳述する。以下に説明する固定方法は、上述の図11A,図11B及び図12に示されるパッチアンテナ10の組立手順の第1例における固定方法として説明するが、図13A及び図13Bに示されるパッチアンテナ10の組立手順の第2例における固定方法にも適用することができる。
・給電部15による電気的な作用
本実施形態のパッチアンテナ10や、変形例のパッチアンテナ10A~パッチアンテナ10Jでは、給電部15は、第1放射素子12及び第2放射素子13の少なくとも一方と電気的に結合するように配置されている。以下では、第8変形例のパッチアンテナ10Hを例として、給電部15による第1放射素子12及び第2放射素子13への電気的な作用について説明する。
上述したように、本実施形態のパッチアンテナ10では、2給電方式が採用されている。以下では、このような2給電方式が採用されたパッチアンテナ10の給電回路の例を説明する。
図16は、第1実施形態のアンテナ装置100の分解斜視図である。図16では、アンテナ装置100のうち、後述するケース1を取り外し、+Z方向の側に移動させた図が示されている。また、図16では、後述するパッチアンテナ10Kの無給電素子39を保持する保持部材や、後述するアンテナ50を保持する保持部材の図示が省略されている。
<<パッチアンテナ20の概要>>
図17は、第2実施形態のパッチアンテナ20の平面図である。
本実施形態のパッチアンテナ20では、第1給電部26と第2給電部27との間のアイソレーションを容易に確保することができる。この点について、図18に示される比較例のパッチアンテナ20Xを参照しつつ説明する。
図19は、変形例のパッチアンテナ20Aの平面図である。
上述した本実施形態のアンテナ装置200は、パッチアンテナ20の特性への影響を抑制しつつ、アンテナ装置200のサイズを抑制することができる。この点について、図21Aに示される第1比較例のアンテナ装置200X、及び図21Bに示される第2比較例のアンテナ装置200Yを参照しつつ説明する。
本明細書によれば、以下の態様のパッチアンテナが提供される。
態様1は、第1放射素子12と、第1放射素子12を囲うように位置する第2放射素子13と、平面視において、第1放射素子12と第2放射素子13との間に位置する少なくとも1つの給電部15と、を備える。
態様2では、少なくとも1つの給電部15は、第1放射素子12と第2放射素子13との間に形成されたスロット領域30に位置する。
態様3は、誘電体14と、誘電体14の一面に位置する第1放射素子12と、第1放射素子12の外側の誘電体14に、第1放射素子12を囲うように位置する第2放射素子13と、第1放射素子12と第2放射素子13との間の誘電体14に位置する、少なくとも1つの給電部15と、を備える。
態様4では、少なくとも1つの給電部15は、第1放射素子12と第2放射素子13との間に形成されたスロット領域30に位置する、
態様5は、誘電体14と、誘電体14に位置する少なくとも1つの給電部15と、誘電体14の一面に位置する第1放射素子12と、第1放射素子12の外側の誘電体14に位置する第2放射素子13と、を備え、少なくとも1つの給電部15は、第2放射素子13の外側に位置する。
態様6では、第1放射素子12と第2放射素子13とで挟まれる領域の最大幅は、第1放射素子12又は第2放射素子13が対応する電波の波長の10分の1未満である。
態様7では、少なくとも1つの給電部15は、第1放射素子12及び第2放射素子13に電気的に結合する。
態様8では、少なくとも1つの給電部15を含む全ての給電部15は、スロット領域30に位置する。
態様9では、第1放射素子12及び第2放射素子13の少なくとも一方には、スロット領域30の幅方向に平行な方向に沿って延びる切れ込み部31が形成されている。
態様10では、切れ込み部33~35は、スロット領域30における少なくとも1つの給電部15が位置する領域から延びる。
11,21 放射素子
12 第1放射素子
13 第2放射素子
14,24 誘電体
15,25 給電部
26 第1給電部
27 第2給電部
28 第3給電部
29 第4給電部
30 スロット領域
31~35 切れ込み部
40 中心
42 角部
43 第1対角線
44 第2対角線
45 第1辺
46 第2辺
47 第1辺の中心(第1中心)
48 第2辺の中心(第2中心)
50 アンテナ
100,200,200X,200Y アンテナ装置
Claims (10)
- 第1放射素子と、
前記第1放射素子を囲うように位置する第2放射素子と、
平面視において、前記第1放射素子と前記第2放射素子との間に位置する少なくとも1つの給電部と、
を備える、
パッチアンテナ。 - 前記少なくとも1つの給電部は、前記第1放射素子と前記第2放射素子との間に形成されたスロット領域に位置する、
請求項1に記載のパッチアンテナ。 - 誘電体と、
前記誘電体の一面に位置する第1放射素子と、
前記第1放射素子の外側の前記誘電体に、前記第1放射素子を囲うように位置する第2放射素子と、
前記第1放射素子と前記第2放射素子との間の前記誘電体に位置する、少なくとも1つの給電部と、を備える、
パッチアンテナ。 - 前記少なくとも1つの給電部は、前記第1放射素子と前記第2放射素子との間に形成されたスロット領域に位置する、
請求項3に記載のパッチアンテナ。 - 誘電体と、
前記誘電体に位置する少なくとも1つの給電部と、
前記誘電体の一面に位置する第1放射素子と、
前記第1放射素子の外側の前記誘電体に位置する第2放射素子と、を備え、
前記少なくとも1つの給電部は、前記第2放射素子の外側に位置する、
パッチアンテナ。 - 前記第1放射素子と前記第2放射素子とで挟まれる領域の最大幅は、前記第1放射素子又は前記第2放射素子が対応する電波の波長の10分の1未満である、
請求項1から4のいずれか一項に記載のパッチアンテナ。 - 前記少なくとも1つの給電部は、前記第1放射素子及び前記第2放射素子に電気的に結合する、
請求項1から5のいずれか一項に記載のパッチアンテナ。 - 前記少なくとも1つの給電部を含む全ての給電部は、前記スロット領域に位置する、
請求項2又は4に記載のパッチアンテナ。 - 前記第1放射素子及び前記第2放射素子の少なくとも一方には、前記スロット領域の幅方向に平行な方向に沿って延びる切れ込み部が形成されている、
請求項2又は4に記載のパッチアンテナ。 - 前記切れ込み部は、前記スロット領域における前記少なくとも1つの給電部が位置する領域から延びる、
請求項9に記載のパッチアンテナ。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110254740A1 (en) * | 2007-11-30 | 2011-10-20 | Harada Industry Of America, Inc. | Microstrip Antenna |
| US20200106176A1 (en) * | 2018-09-12 | 2020-04-02 | U-Blox Ag | Multiband patch antenna |
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| CN103703620B (zh) * | 2013-08-26 | 2016-12-14 | 华为技术有限公司 | 宽带双极化阵列天线及基站 |
| WO2017008267A1 (en) * | 2015-07-15 | 2017-01-19 | Huawei Technologies Co., Ltd. | Dual polarized electronically steerable parasitic antenna radiator |
-
2023
- 2023-08-10 WO PCT/JP2023/029349 patent/WO2024034680A1/ja not_active Ceased
- 2023-08-10 JP JP2024540529A patent/JPWO2024034680A1/ja active Pending
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110254740A1 (en) * | 2007-11-30 | 2011-10-20 | Harada Industry Of America, Inc. | Microstrip Antenna |
| US20200106176A1 (en) * | 2018-09-12 | 2020-04-02 | U-Blox Ag | Multiband patch antenna |
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| WO2024034681A1 (ja) | 2024-02-15 |
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