JP6629896B2 - Antenna device and measuring device using the antenna device - Google Patents

Description

  The present invention relates to an antenna device and a measuring device using the antenna device.

  For a device having a function of transmitting and receiving radio waves, transmission and reception characteristics of radio waves are measured for research and development and inspection. Examples of devices to be measured (devices to be measured) include mobile terminals such as mobile phones, smartphones, and tablet terminals, and various antennas.

  Generally, in this type of measuring device, a radio wave transmitted from a device under test installed in a radio anechoic chamber is received by a test antenna, and the received signal is analyzed to measure the radio wave transmission characteristics of the device under test. . Further, a radio wave is transmitted from the test antenna in the radio wave anechoic chamber and received by the device under test, and the reception result is analyzed to measure the radio wave reception characteristics of the device under test.

  The test antenna used for measuring the transmission / reception characteristics of radio waves needs to correspond to the radio transmission / reception performance of various devices under test, so that the frequency characteristics are desirably broadband. For example, a tapered slot antenna (TSA (Tapered Slot Antenna)) is already known as a broadband antenna for transmitting and receiving linearly polarized waves (for example, see Patent Document 1).

  Patent Document 1 describes a tapered slot antenna having a dielectric substrate, a pair of metal films provided on the dielectric substrate, and a slot line extending in a tapered shape between the pair of metal films. .

JP 2009-055414 A

  However, in the antenna described in Patent Literature 1, only linear polarization having an electric field oscillation plane in a direction parallel to the dielectric substrate could be measured. In order to measure a linearly polarized wave having an electric field vibration plane in a direction perpendicular to the dielectric substrate, it was necessary to rotate the test antenna by 90 ° or the device to be measured by 90 °.

  The present invention has been made in order to solve the above-described problems, and provides an antenna device capable of simultaneously transmitting or receiving both horizontal polarization and vertical polarization, and a measurement device using the antenna device. The purpose is to do.

To achieve the above object, the antenna device according to claim 1 of the present invention includes a first substrate (20) made of a dielectric and a first antenna conductor (20) provided on one surface (20a) of the first substrate. 21) and a second antenna conductor (23) provided on the other surface (20b), and a first slot (25) opening toward the first end surface (20c) of the first substrate. A first antenna element (2), a second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and another surface (30b) And a second antenna element (3) having a fourth antenna conductor (33) provided on the second substrate. The second substrate has a third end surface (30d) opposed to a second end surface (30c). And the fourth end face (30e) , and the end of the third end face or the fourth end face (30e) . A fifth end surface (30f) including any one of the ends of the end surface , wherein the fourth end surface is located between the second end surface and the third end surface, and the first substrate and the second substrate So that at least the fourth end face of the second substrate is inserted into the first slot of the first board, and the fourth end face of the second board is separated from the fifth end face It is characterized in that it is inclined so that the distance from the second end face decreases as the distance from the second end surface decreases .

  As described above, in the antenna device according to claim 1 of the present invention, the first substrate of the first antenna element has the first slot opening toward the first end face. Further, the second substrate of the second antenna element has a third end face and a fourth end face facing the second end face, and the fourth end face is located between the second end face and the third end face. Then, the fourth end face of the second substrate is inserted into the first slot of the first substrate such that the first substrate and the second substrate intersect.

  With this configuration, the first antenna element transmits or receives a linearly polarized wave (for example, a horizontally polarized wave) having an electric field vibration plane in a direction parallel to the first substrate, and at the same time, the second antenna element A linearly polarized wave (for example, a vertically polarized wave) having an electric field vibration plane in a direction parallel to the second substrate can be transmitted or received.

Further, in the antenna device according to claim 1 of the present invention, the second substrate has a third end face and a fourth end face facing the second end face, and the fourth end face is between the second end face and the third end face. It is located in. That is, the second substrate has a cutout portion defined by the third end surface and the fourth end surface. With this configuration, when inserting and assembling the second substrate into the first slot of the first substrate, the second substrate can be slid laterally with respect to the first substrate, which facilitates the assembly. Also, the fourth end surface of the second substrate is inclined so that the distance from the second end surface decreases as the distance from the fifth end surface increases, so that the second substrate is slid laterally with respect to the first substrate. When assembling, it becomes easy to insert the fourth end face of the second substrate into the first slot of the first substrate.

In the antenna device according to claim 2 of the present invention, the fifth end surface of the second substrate is in contact with the first substrate .

With this configuration, when assembling the antenna device according to claim 2 of the present invention by sliding the second substrate laterally with respect to the first substrate, the fifth end face of the second substrate abuts on the first substrate. By laterally sliding until it hits, the second substrate can be easily positioned in the lateral direction .

An antenna device according to claim 3 of the present invention includes a first substrate (20) made of a dielectric, a first antenna conductor (21) provided on one surface (20a) of the first substrate, and another surface ( A first antenna element (20) having a second antenna conductor (23) provided in the first substrate (20b) and a first slot (25) opening toward the first end surface (20c) of the first substrate (20). 2), a second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and a fourth substrate provided on the other surface (30b). And a second antenna element (3) having an antenna conductor (33), wherein the second substrate has a third end face (30d) and a fourth end face (30e) facing the second end face (30c). ), And a seventh end face connecting the second end face and the fourth end face. The fourth end face is located between the second end face and the third end face, and at least the fourth end face of the second substrate is arranged so that the first substrate and the second substrate intersect. It is characterized by being inserted into the first slot of the first substrate .

With this configuration, in the antenna device according to claim 3 of the present invention, the first antenna element transmits or transmits a linearly polarized wave (for example, a horizontally polarized wave) having an electric field vibration plane in a direction parallel to the first substrate. Receiving and, at the same time, the second antenna element can transmit or receive linearly polarized (eg, vertically polarized) having an electric field oscillating surface in a direction parallel to the second substrate. Further, the second substrate has a third end face and a fourth end face facing the second end face, and the fourth end face is located between the second end face and the third end face. That is, the second substrate has a cutout portion defined by the third end surface and the fourth end surface. With this configuration, when inserting and assembling the second substrate into the first slot of the first substrate, the second substrate can be slid laterally with respect to the first substrate, which facilitates the assembly.

In the antenna device according to claim 4 of the present invention, the second substrate has a fifth end surface (30f) including either the end of the third end surface or the end of the fourth end surface .

With this configuration, in the antenna device according to claim 4 of the present invention, when assembling the second substrate horizontally with respect to the first substrate, the fifth end surface of the second substrate acts as a stopper, and Can be limited .

  In the antenna device according to claim 5 of the present invention, the first antenna conductor and the second antenna conductor are formed by a conductor pattern on the first substrate, and the third antenna conductor and the fourth antenna conductor are The second substrate is formed of a conductor pattern.

  With this configuration, the antenna device according to claim 5 of the present invention provides the first antenna conductor, the second antenna conductor, the third antenna conductor, and the fourth antenna conductor on the first substrate or the second substrate by photolithography. It can be easily formed.

  The antenna device according to claim 6, wherein the first substrate is provided with a first transmission line formed of a conductor pattern and connected to the first antenna conductor on the one surface of the first substrate. A second transmission path formed of a conductor pattern and connected to the second antenna conductor is provided on the other surface of the first transmission path, and the first transmission path and the second transmission path sandwich the first substrate. A third transmission path formed by a conductor pattern and connected to the third antenna conductor is provided on the one surface of the second substrate, and a conductor is provided on the other surface of the second substrate. A fourth transmission path formed by a pattern and connected to the fourth antenna conductor is provided, and the third transmission path and the fourth transmission path face each other with the second substrate interposed therebetween.

  With this configuration, in the antenna device according to claim 6 of the present invention, the first transmission path and the second transmission path form a pair strip line with the first substrate interposed therebetween. Thus, it is possible to efficiently supply power to the first antenna conductor and the second antenna conductor and transmit signals from the first antenna conductor and the second antenna conductor. Similarly, the third transmission line and the fourth transmission line form a pair strip line with the second substrate interposed therebetween. This makes it possible to efficiently supply power to the third antenna conductor and the fourth antenna conductor and transmit signals from the third antenna conductor and the fourth antenna conductor. In addition, since an impedance matching stub that narrows the band of the antenna performance is unnecessary, it is possible to realize a wider band of the antenna.

  In the antenna device according to claim 7 of the present invention, the first slot is formed by cutting out a portion of the first substrate corresponding to a gap between the first antenna conductor and the second antenna conductor, The second antenna element has a second slot (35) opening toward a second end face of the second substrate, the second antenna element having a portion gradually expanding toward a first end face; The two slots are formed by cutting out a portion of the second substrate corresponding to a gap between the third antenna conductor and the fourth antenna conductor, and gradually expand toward the second end surface of the second substrate. It has a part to do.

  With this configuration, in the antenna device according to claim 7 of the present invention, the substrate portion corresponding to the gap between the first antenna conductor and the second antenna conductor and the gap between the third antenna conductor and the fourth antenna conductor is notched. Therefore, the attenuation of the radio wave to be transmitted and received on the substrate can be reduced.

  In the antenna device according to claim 8 of the present invention, the first slot is opposed to the first end face from a tip end (25a) of the portion gradually expanding toward the first end face of the first slot. It further includes a slit (26) extending in a direction orthogonal to the six end faces (20d).

  With this configuration, in the antenna device according to claim 8 of the present invention, the first slot has a slit extending from the tip of the tapered notch, and the second substrate is inserted into the slit. It has become. Thereby, the movement of the second substrate is regulated, so that the antenna device can be easily assembled.

  A measuring device according to a ninth aspect of the present invention is provided with a radio anechoic chamber (101), a radio wave absorber (102) provided on an inner wall of the radio anechoic chamber, and a radio wave anechoic chamber. An antenna device (1) according to any one of claims 1 to 8, and a signal analyzer (103) connected to the antenna device, wherein the signal analyzer (103) is installed inside the anechoic chamber. The horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under test (120) are simultaneously received by the antenna device and sent to the signal analyzer as a first reception signal and a second reception signal, respectively. The radio wave transmission characteristic of the device under test is measured by the signal analyzer based on the first received signal and the second received signal.

  With this configuration, the measuring apparatus according to the ninth aspect of the present invention simultaneously receives the horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under test, and based on each polarization component, Transmission characteristics can be measured efficiently.

  A measuring apparatus according to claim 10 of the present invention is provided in a radio anechoic chamber (101), a radio wave absorber (102) provided on an inner wall of the radio anechoic chamber, and provided inside the radio anechoic chamber. The first antenna device (1a) according to any one of claims 1 to 8, the second antenna device (1b) according to any one of claims 1 to 8, and the first antenna device (1b). A signal generator (104) connected to the antenna device; and a signal analyzer (103) connected to the second antenna device, wherein the first transmission signal and the second transmission signal generated by the signal generator are provided. 2 is transmitted to the first antenna device and is simultaneously radiated from the first antenna device as a horizontally polarized wave and a vertically polarized wave, respectively. The device to be measured (120 The response radio wave radiated by the device under test in response to the received horizontal polarization and the vertical polarization is simultaneously received by the second antenna device as a horizontal polarization component and a vertical polarization component. Are sent to the signal analyzer as a first reception signal and a second reception signal, respectively, and are transmitted and received by the signal analyzer based on the first reception signal and the second reception signal. The characteristic is measured.

  With this configuration, the measuring device according to claim 10 of the present invention simultaneously radiates the horizontal polarization and the vertical polarization from the first antenna device, and outputs the horizontal polarization component of the response radio wave of the device to be measured such as a portable terminal. The vertically polarized wave components are simultaneously received by the second antenna device, and the radio wave transmission / reception characteristics of the device under test can be efficiently measured based on the received polarized wave components.

  An antenna device according to claim 11 of the present invention is a first substrate (20) made of a dielectric, a first antenna conductor (21) provided on one surface (20a) of the first substrate, and another surface ( A first antenna element (20) having a second antenna conductor (23) provided in the first substrate (20b) and a first slot (25) opening toward the first end surface (20c) of the first substrate (20). 2), a second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and a fourth substrate provided on the other surface (30b). An antenna conductor (33); and a second antenna element (3) having an antenna conductor (33), wherein the second substrate has a third end face (30d) opposed to a second end face (30c), At least the second substrate so that the first substrate and the second substrate intersect with each other Is inserted into the first slot, the longitudinal direction of the longitudinal and the second end surface of the third end face is characterized by a predetermined angle (phi) corresponding to the length of the first slot.

  With this configuration, the antenna device according to claim 11 of the present invention can simultaneously transmit or receive both horizontally polarized waves and vertically polarized waves. When the second substrate is inserted into the first slot of the first substrate and assembled, the second substrate can be slid laterally with respect to the first substrate, which facilitates the assembly.

  In the antenna device according to claim 12 of the present invention, the distance (L) from the center (O) of the third end face to the second end face is shorter than the length of the first slot.

  With this configuration, when assembling the antenna device according to claim 12 of the present invention by sliding the second substrate laterally with respect to the first substrate, the second substrate is inserted into the first slot of the first substrate. It is easier to do that.

  According to the present invention, it is possible to provide an antenna device that can simultaneously transmit or receive both horizontal polarization and vertical polarization, and a measurement device that uses the antenna device.

FIG. 2 is a perspective view of the antenna device according to the first embodiment of the present invention. (A) is a top view of the 1st antenna element in the antenna apparatus shown in FIG. 1, (b) is the bottom view. (A) is a top view of the 2nd antenna element in the antenna apparatus shown in FIG. 1, (b) is the bottom view. 2A is a partial sectional view taken along line AA of FIG. 2A, FIG. 2B is a partial sectional view taken along line BB of FIG. 2A, and FIG. 2C is a sectional view of FIG. It is a CC partial sectional view. 3A is a partial sectional view taken along line EE of FIG. 3A, FIG. 3B is a partial sectional view taken along line FF of FIG. 3A, and FIG. 3C is a sectional view of FIG. It is a GG line partial sectional view. FIG. 3 is an explanatory diagram illustrating a method of assembling the antenna device illustrated in FIG. 1. FIG. 9 is a cross-sectional view illustrating a modification of the antenna device according to the embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the antenna device shown in FIG. 1 is attached to a holder. It is a perspective view of the antenna device concerning a 2nd embodiment of the present invention. (A) is a top view of the 1st antenna element in the antenna apparatus shown in FIG. 9, (b) is the bottom view. (A) is a top view of the 2nd antenna element in the antenna apparatus shown in FIG. 9, (b) is the bottom view. It is a perspective view of the antenna device concerning a 3rd embodiment of the present invention. 13A is a plan view of a first antenna element in the antenna device shown in FIG. 12, and FIG. 13B is a bottom view thereof. FIG. 13 shows a second antenna element included in the antenna device according to the fourth embodiment of the present invention, where (a) is a plan view and (b) is a bottom view. FIG. 14 shows a second antenna element included in the antenna device according to the fifth embodiment of the present invention, where (a) is a plan view and (b) is a bottom view. It is a lineblock diagram showing the example of composition of the measuring device concerning the embodiment of the present invention. It is a lineblock diagram showing the example of composition of the measuring device concerning the embodiment of the present invention. It is a lineblock diagram showing the example of composition of the measuring device concerning the embodiment of the present invention. 9 shows measured values of frequency characteristics of a first antenna element and a second antenna element of the antenna device according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
As shown in FIG. 1, an antenna device 1 according to a first embodiment of the present invention has a first antenna element 2 and a second antenna element 3. The first antenna element 2 transmits and receives linearly polarized waves (for example, horizontally polarized waves) having an electric field vibration plane in a direction parallel to the XZ plane, and the second antenna element 3 is parallel to the YZ plane. Linearly polarized waves (for example, vertically polarized waves) having an electric field vibration plane in various directions are transmitted and received. That is, the antenna device 1 is a so-called dual polarization antenna. Further, the antenna device 1 has directivity in the transmission / reception direction of radio waves (directivity in the Z direction).

  The antenna device 1 according to the present embodiment is used as a test antenna in a radio wave anechoic chamber to measure radio wave transmission / reception characteristics of a mobile terminal such as a smartphone or a tablet terminal, or an antenna. The frequency band of radio waves that can be transmitted and received by the antenna device 1 is, for example, a 28 GHz band (23 to 31 GHz) or a 39 GHz band (35 to 43 GHz).

[First antenna element]
As shown in FIG. 2, the first antenna element 2 includes a first substrate 20 made of a dielectric and a first antenna conductor 21 provided on a first surface 20 a which is one surface of the first substrate 20. And a second antenna conductor 23 provided on a second surface 20 b which is the other surface of the first substrate 20. The first antenna element 2 further has a first slot 25 opening toward the first end face 20c of the first substrate. The width of the first slot 25 is slightly larger than the thickness of the second substrate 30 so that the second substrate 30 can be inserted.

  As shown in FIG. 2, the distance between the first antenna conductor 21 and the second antenna conductor 23 gradually increases toward the first end face 20 c of the first substrate 20. That is, the first antenna element 2 is a so-called tapered slot antenna. The angle θ1 between the first antenna conductor 21 and the second antenna conductor 23 is a parameter that determines the beam width of the radio wave radiated from the first antenna element 2, and takes into account the position of the device to be measured and the range of fluctuation of the position. Is determined. Although not limited, for example, θ1 = 15 °.

  The first substrate 20 is a printed circuit board made of a dielectric material having a low dielectric constant and a low dielectric loss tangent in order to suppress transmission loss and realize a wide band. Although this printed board is a double-sided board, it is a matter of course that a multilayer board having an arbitrary number of layers may be used. As shown in FIG. 2, the shape of the first substrate 20 is a rectangle having a width W1 and a height H1. Although not limited, for example, the width W1 is 60 mm, the height H1 is 80 mm, and the thickness is 0.3 mm.

  The first antenna conductor 21 and the second antenna conductor 23 are copper foil conductor patterns formed on the first surface 20a and the second surface 20b of the first substrate 20, respectively. As shown in FIG. 2A, the outer shape of the first antenna conductor 21 in a plan view is a quadrangle. One side of the square extends along the first end face 20c, the next side extends a predetermined length in a direction (Z direction) perpendicular to the first end face 20c, and the next side is the tip of the first slot 25. 25a. As shown in FIG. 2B, the second antenna conductor 23 has the same shape as the first antenna conductor 21.

  The first antenna conductor 21 and the second antenna conductor 23 of the present embodiment are square as described above, but the shape is not limited to this, and may be any polygon such as a triangle or a pentagon. Further, any one or all sides of the polygon may be curved. Further, the first antenna conductor 21 and the second antenna conductor 23 may have different shapes in order to adjust antenna characteristics.

  On the first surface 20a of the first substrate 20, a first transmission path 22 formed of a conductor pattern made of copper foil is formed. The first transmission path 22 has one end connected to the first antenna conductor 21 and the other end connected to the center conductor of the coaxial connector 27. In addition, a second transmission path 24 formed of a conductor pattern made of copper foil is formed on the second surface 20b of the first substrate 20. The second transmission path 24 has one end connected to the second antenna conductor 23 and the other end connected to the outer conductor of the coaxial connector 27.

  As shown in FIGS. 2 and 4A, the first transmission path 22 and the second transmission path 24 face each other across the first substrate 20, and form a pair strip line. Further, as shown in FIG. 4B, the second transmission path 24 is formed such that the end connected to the coaxial connector 27 is divergent, and the first transmission path 22 and the second transmission path 24 are connected to each other. A microstrip line is formed. As shown in FIG. 4C, the first antenna conductor 21 formed on the first surface 20a of the first substrate 20 and the second antenna conductor 23 formed on the second surface 20b It is arranged diagonally across the slot 25.

  The coaxial connector 27 is provided on one of the seventh end face 20g and the eighth end face 20h adjacent to both ends of the first end face 20c of the first substrate 20. Although a K connector is used as the coaxial connector 27, the type is not limited to this.

[Second antenna element]
Next, the second antenna element 3 will be described.

  As shown in FIG. 3, the second antenna element 3 includes a second substrate 30 made of a dielectric and a third antenna conductor 31 provided on a third surface 30 a which is one surface of the second substrate 30. And a fourth antenna conductor 33 provided on a fourth surface 30b which is the other surface of the second substrate 30.

  The distance between the third antenna conductor 31 and the fourth antenna conductor 33 gradually increases toward the second end surface 30c of the second substrate 30. The angle θ2 between the third antenna conductor 31 and the fourth antenna conductor 33 is a parameter that determines the beam width of the radio wave radiated from the second antenna element 3. The angle θ2 is equal to the angle θ1 between the first antenna conductor 21 and the second antenna conductor 23, but may be different from each other.

  The second substrate 30 is formed of a printed circuit board made of the same material as the first substrate 20, and has a rectangular shape having a width W2 and a height H3 similarly to the first substrate 20. That is, W1 = W2 and H1 = H3. In order to adjust the antenna characteristics, the first substrate 20 and the second substrate 30 may have different shapes from each other, or may be made of different materials.

  The third antenna conductor 31 and the fourth antenna conductor 33 are copper foil conductor patterns formed on the third surface 30a and the fourth surface 30b of the second substrate 30, respectively. As shown in FIG. 3A, the third antenna conductor 31 has a rectangular shape in plan view. One side of the square extends along the second end face 30c, and the subsequent side extends a predetermined length in a direction (Z direction) perpendicular to the first end face 20c.

  As shown in FIG. 3B, the fourth antenna conductor 33 has the same shape as the third antenna conductor 31. The third antenna conductor 31 and the fourth antenna conductor 33 may have the same shape as the first antenna conductor 21 and the second antenna conductor 23, or a deviation of the antenna characteristics of the first antenna element 2 and the second antenna element 3. The shape may be changed in order to adjust so as to eliminate.

  As shown in FIG. 3, the second substrate 30 has a third end face 30d and a fourth end face 30e facing the second end face 30c, and the fourth end face 30e is composed of the second end face 30c and the third end face 30d. It is located between. The width W3 of the fourth end surface 30e is substantially equal to a half of the width W2 of the second substrate 30 plus half the thickness t of the first substrate 20. That is, W3 ≒ W2 / 2 + t / 2.

  The second substrate 30 has a fifth end face 30f including (connecting to) one end of the third end face 30d and one end of the fourth end face 30e. The fifth end face 30f forms a step between the third end face 30d and the fourth end face 30e, and the height H4 thereof varies from the tip end 25a of the first slot 25 of the first substrate 20 to the sixth end face 20d. Is slightly larger than the distance H2 (see FIG. 2). In other words, a rectangular notch 36 having a width W3 and a height H4 is formed on the third end face 30d side of the second substrate 30. With this configuration, it is easy to assemble the second substrate 30 by sliding the second substrate 30 sideways with respect to the first substrate 20.

  On the third surface 30a of the second substrate 30, a third transmission path 32 formed of a conductor pattern made of copper foil is formed. The third transmission path 32 has one end connected to the third antenna conductor 31 and the other end connected to the center conductor of the coaxial connector 37. On the fourth surface 30b of the second substrate 30, a fourth transmission path 34 formed of a conductor pattern made of copper foil is formed. The fourth transmission path 34 has one end connected to the fourth antenna conductor 33 and the other end connected to an external conductor of the coaxial connector 37.

  As shown in FIG. 3 and FIG. 5A, the third transmission path 32 and the fourth transmission path 34 face each other with the second substrate 30 interposed therebetween, and form a pair strip line. Further, as shown in FIG. 5B, the fourth transmission line 34 is formed such that the end connected to the coaxial connector 37 has a divergent shape, and the third transmission line 32 and the fourth transmission line 34 are separated from each other. A microstrip line is formed. Further, as shown in FIG. 5C, the third antenna conductor 31 formed on the third surface 30a of the second substrate 30 and the fourth antenna conductor 33 formed on the fourth surface 30b are Are arranged diagonally across the substrate 30.

  Next, the three-dimensional structure of the antenna device 1 according to the present embodiment will be described.

  As shown in FIG. 1, in the antenna device 1 according to the present embodiment, the first substrate 20 and the second substrate 30 are arranged such that the first antenna element 2 and the second antenna element 3 are orthogonal to each other. Assembled. Specifically, at least the fourth end face 30 e of the second substrate 30 is inserted into the first slot 25 of the first substrate 20 so that the first substrate 20 and the second substrate 30 are orthogonal to each other. I have.

  More specifically, in the antenna device 1, a portion along the center line T <b> 2 of the second substrate 30 is sandwiched between the first slots 25 of the first substrate 20. That is, the first substrate 20 and the second substrate 30 are orthogonal so that the center line T1 of the first substrate 20 and the center line T2 of the second substrate 30 match.

  At the time of assembly, as shown in FIG. 6A, the second substrate 30 is slid in the direction of arrow K with respect to the first substrate 20 so that the portion above the fourth end surface 30e is the first substrate. 20 into the first slot 25. Then, as shown in FIG. 6B, in a state where the fifth end face 30f of the second substrate 30 abuts against the first substrate 20, the first substrate 20 and the second substrate 30 are held by a holder to be described later. Support at 40.

  In the assembled antenna device 1, the fifth end surface 30 f of the second substrate 30 is in contact with the second surface 20 b of the first substrate 20. It is needless to say that the first substrate 20 may be slid laterally with respect to the second substrate 30 during assembly.

  FIG. 7 is a cross-sectional view similar to FIG. 6B, showing a modification of the antenna device 1. In the modification shown in FIG. 7A, the fourth end face 30e of the second substrate 30A is inclined such that the distance from the fifth end face 30f decreases as the distance from the second end face 30c increases. With this configuration, when assembling the second substrate 30A by sliding the second substrate 30A sideways with respect to the first substrate 20, the fourth end face 30e of the second substrate 30A is inserted into the first slot 25 of the first substrate 20. Will be easier.

  In the modification shown in FIG. 7B, the second substrate 30 </ b> B has the fourth end face 30 e separated from the distal end 25 a of the first slot 25 of the first substrate 20. The fifth end face 30f of the second substrate 30B is separated from the second face 20b of the first substrate 20. With this configuration, it is easy to slide the second board 30B relative to the first board 20 and assemble the first board 20 during assembly.

  FIG. 8 shows a state in which the antenna device 1 according to the present embodiment is attached to the holder 40. The holder 40 has a pedestal 45, four support members 41, 42, 43, 44 and a fixing member 46. The supports 41, 42, 43, 44 are fixed to the pedestal 45 by fixings 46. Each of the supports 41, 42, 43, and 44 is composed of two members, and is configured to support the first substrate 20 or the second substrate 30 between the members.

  The first substrate 20 is supported by the supporting members 41 and 42 of the holder 40. Further, the second substrate 30 is supported by a support tool 43 and a support tool 44. The first substrate 20 and the second substrate 30 are set on a table surface 46c of the holder 40. The holder 40, including the fixing screw 47, is entirely made of polycarbonate having a low dielectric constant so as not to affect radio waves transmitted and received by the antenna device 1.

  Next, the operation and effect will be described.

  In the antenna device 1 according to the present embodiment, each of the first antenna element 2 and the second antenna element 3 is a tapered slot antenna. The first substrate 20 of the first antenna element 2 has a first slot 25 that opens toward the first end face 20c. The second substrate 30 of the second antenna element 3 has a third end face 30d and a fourth end face 30e facing the second end face 30c, and the fourth end face 30e is between the second end face 30c and the third end face 30d. It is located in. Then, the fourth end face 30 e of the second substrate 30 is inserted into the first slot 25 of the first substrate 20 so that the first substrate 20 and the second substrate 30 intersect.

  With this configuration, the first antenna element 2 transmits or receives a linearly polarized wave (for example, a horizontally polarized wave) having an electric field vibration plane in a direction parallel to the first substrate 20, and at the same time, the second antenna element 3 can transmit or receive a linearly polarized wave (for example, a vertically polarized wave) having an electric field vibration plane in a direction parallel to the second substrate 30.

  Further, in the antenna device 1 according to the present embodiment, the second substrate 30 has a third end surface 30d and a fourth end surface 30e facing the second end surface 30c, and the fourth end surface 30e is in contact with the second end surface 30c. It is located between the three end surfaces 30d. That is, the cutout portion 36 defined by the third end face 30d and the fourth end face 30e is formed in the second substrate 30.

  With this configuration, when inserting and assembling the second substrate 30 into the first slot 25 of the first substrate 20, the second substrate 30 can be slid horizontally to a predetermined position with respect to the first substrate 20. It can be easily assembled.

  In the antenna device 1 according to the present embodiment, the second substrate 30 has a fifth end face 30f including any one of the third end face 30d and the fourth end face 30e. With this configuration, when assembling the second substrate 30 by sliding the second substrate 30 laterally with respect to the first substrate 20, the fifth end surface 30f of the second substrate 30 functions as a stopper, and the range of lateral sliding can be limited. .

  In the antenna device 1 according to the present embodiment, the fifth end face 30f of the second substrate 30 is in contact with the first substrate 20. With this configuration, when assembling the second substrate 30 by sliding the second substrate 30 laterally with respect to the first substrate 20, the second substrate 30 is laterally slid until the fifth end surface 30 f of the second substrate 30 abuts on the first substrate 20. In addition, the positioning of the second substrate 30 in the horizontal direction (Y-axis direction) can be easily performed.

  Further, in the antenna device 1 according to the present embodiment, the first antenna conductor 21 and the second antenna conductor 23 are formed on the first substrate 20 by a conductor pattern, and the third antenna conductor 31 and the fourth antenna conductor 33 The second substrate 30 is formed by a conductor pattern. With this configuration, the first antenna conductor 21, the second antenna conductor 23, the third antenna conductor 31, and the fourth antenna conductor 33 can be easily formed on the first substrate 20 or the second substrate 30 by photolithography. it can.

  Further, in the antenna device 1 according to the present embodiment, the first transmission line 22 formed of a conductor pattern and connected to the first antenna conductor 21 is formed on the first surface 20 a of the first substrate 20. In addition, a second transmission path 24 formed of a conductor pattern and connected to the second antenna conductor 23 is formed on the second surface 20 b of the first substrate 20. The first transmission path 22 and the second transmission path 24 are arranged to face each other with the first substrate 20 interposed therebetween, forming a so-called pair strip line. Similarly, in the second substrate 30, the third transmission line 32 and the fourth transmission line 34 are arranged opposite to each other with the second substrate 30 interposed therebetween, and form a pair strip line.

  With this configuration, it is possible to efficiently supply power to the first antenna conductor 21 and the second antenna conductor 23 and transmit signals from the first antenna conductor 21 and the second antenna conductor 23. Similarly, it is possible to efficiently supply power to the third antenna conductor 31 and the fourth antenna conductor 33 and transmit signals from the third antenna conductor 31 and the fourth antenna conductor 33. In addition, the antenna device 1 according to the present embodiment does not require a stub for impedance matching that narrows the band of the antenna performance, and thus can achieve a wider band of the antenna.

[Second embodiment]
Next, an antenna device according to a second embodiment of the present invention will be described.

  FIG. 9 is a perspective view of an antenna device 1A according to the second embodiment of the present invention. The antenna device 1A according to the present embodiment is such that the first antenna element 2A has a tapered first slot 25 and the second antenna element 3A has a tapered second slot 35. This is different from the first embodiment. Other configurations are the same as those of the first embodiment. The same components are denoted by the same reference numerals, and detailed description is omitted.

  FIG. 10A is a plan view of the first antenna element 2A in the antenna device 1A, and FIG. 10B is a bottom view thereof. The first antenna element 2A has a first slot 25 that opens toward the first end face 20c of the first substrate 20. The first slot 25 is formed by cutting out a portion of the first substrate 20 corresponding to the gap between the first antenna conductor 21 and the second antenna conductor 23, and gradually expands toward the first end face 20c. Has a part.

  FIG. 11A is a plan view of the second antenna element 3A in the antenna device 1A, and FIG. 11B is a bottom view thereof. The second antenna element 3A has a second slot 35 opening toward the second end face 30c of the second substrate 30. The second slot 35 is formed by cutting out a portion of the second substrate 30 corresponding to the gap between the third antenna conductor 31 and the fourth antenna conductor 33, and gradually expands toward the second end face 30c. ing.

  In the present embodiment, transmission and reception are performed because the substrate portions corresponding to the gap between the first antenna conductor 21 and the second antenna conductor 23 and the gap between the third antenna conductor 31 and the fourth antenna conductor 33 are notched. The attenuation of the radio wave on the substrate can be reduced.

[Third Embodiment]
Next, an antenna device according to a third embodiment of the present invention will be described.

  FIG. 12 is a perspective view of an antenna device 1B according to the third embodiment of the present invention. The antenna device 1B according to the present embodiment is different from the second embodiment in that a slit 26 is further included in the first slot 25 of the first antenna element 2B. Other configurations are the same as those of the second embodiment, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

  FIG. 13A is a plan view of the first antenna element 2B in the antenna device 1B, and FIG. 13B is a bottom view thereof. The first antenna element 2B has a first slot 25 that opens toward the first end face 20c of the first substrate 20. The first slot 25 is formed by cutting out a portion of the first substrate 20 corresponding to the gap between the first antenna conductor 21 and the second antenna conductor 23, and gradually expands toward the first end face 20c. ing.

  The first slot 25 is a slit extending in a direction (Z direction) orthogonal to a sixth end face 20d opposed to the first end face 20c from a tip end portion 25a in a portion gradually expanding toward the first end face 20c of the first slot 25. 26. The width of the slit 26 is slightly larger than the thickness of the second substrate 30 so that the second substrate 30 can be inserted.

  The second antenna element 3B is the same as the second antenna element 3A according to the second embodiment shown in FIG. Alternatively, the second antenna element 3 according to the first embodiment shown in FIG. 3 may be employed as the second antenna element 3B.

  In the present embodiment, the first slot 25 has a slit 26 extending from the front end 25a of the tapered notch, and the second substrate 30 is inserted into the slit 26. Accordingly, the movement of the second substrate 30 in the lateral direction (X direction) is restricted, so that the antenna device can be easily assembled.

[Fourth embodiment]
Next, an antenna device according to a fourth embodiment of the present invention will be described.

  The antenna device according to the present embodiment is different from the non-inclined second embodiment in that the fourth end surface 30e facing the second end surface 30c of the second antenna element 3C is inclined. Other configurations are the same as those of the second embodiment, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

  The first antenna element is the same as the first antenna element 2A according to the second embodiment shown in FIG. 10, but the first antenna element 2 according to the first embodiment shown in FIG. 13, a first antenna element 2B according to the third embodiment may be employed.

  FIG. 14A is a plan view of the second antenna element 3C, and FIG. 14B is a bottom view thereof. The second antenna element 3C has a second slot 35 opening toward the second end face 30c of the second substrate 30. The second slot 35 is formed by cutting out a portion of the second substrate 30 corresponding to the gap between the third antenna conductor 31 and the fourth antenna conductor 33, and gradually expands toward the second end face 30c. ing.

  As shown in FIG. 14, the second substrate 30 has a third end face 30d and a fourth end face 30e facing the second end face 30c. The third end face 30d is parallel to the second end face 30c, and the fourth end face 30e is inclined with respect to the second end face 30c. The longitudinal direction of the fourth end face 30e and the longitudinal direction of the second end face 30c have an angle ψ, and the angle ψ depends on the length of the first slot 25 (see FIG. 10) and the third end face 30d. Is set to a value.

  Specifically, the distance M between the intersection P between the fourth end face 30e and the center line T2 and the second end face 30c is shorter than the length of the first slot 25. With this configuration, when assembling the second substrate 30 by sliding the second substrate 30 sideways with respect to the first substrate 20, the second substrate 30 does not hit the distal end portion 25a of the first slot 25 until it reaches a predetermined position. , Making assembly easier.

[Fifth Embodiment]
Next, an antenna device according to a fifth embodiment of the present invention will be described.

  The antenna device according to the present embodiment is different from the non-inclined second embodiment in that the third end surface 30d facing the second end surface 30c of the second antenna element 3D is inclined. Other configurations are the same as those of the second embodiment, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

  The first antenna element is the same as the first antenna element 2A according to the second embodiment shown in FIG. 10, but the first antenna element 2 according to the first embodiment shown in FIG. 13, a first antenna element 2B according to the third embodiment may be employed.

  FIG. 15A is a plan view of the second antenna element 3D, and FIG. 15B is a bottom view thereof. The second antenna element 3D has a second slot 35 opening toward the second end face 30c of the second substrate 30. The second slot 35 is formed by cutting out a portion of the second substrate 30 corresponding to the gap between the third antenna conductor 31 and the fourth antenna conductor 33, and gradually expands toward the second end face 30c. ing.

  As shown in FIG. 15, the second substrate 30 has a third end face 30d facing the second end face 30c. The longitudinal direction of the third end face 30d and the longitudinal direction of the second end face 30c have an angle φ, and the angle φ is set to a value corresponding to the length of the first slot 25.

  Specifically, the distance L from the center O of the third end face 30d to the second end face 30c is shorter than the length of the first slot 25. With this configuration, when assembling the second substrate 30 by sliding the second substrate 30 sideways with respect to the first substrate 20, the second substrate 30 does not hit the distal end portion 25a of the first slot 25 until it reaches a predetermined position. , Making assembly easier.

  Next, the measuring device according to the present embodiment will be described.

[Configuration Example 1 of Measurement Apparatus]
FIG. 16A shows a configuration example 1 of the measuring apparatus 100A according to the present embodiment. This measuring apparatus 100A includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, an antenna apparatus 1 provided inside the radio anechoic chamber 101, and an antenna apparatus 1. And a signal analyzer 103 connected thereto. Instead of the antenna device 1, any of the antenna devices of the second to fifth embodiments may be used, and the same applies to the following configuration examples 2 to 7.

  The signal analyzer 103 is, for example, a spectrum analyzer. The antenna device 1 is held by a holder 40. The coaxial connector 27 of the first antenna element 2 of the antenna device 1 and the signal analyzer 103 are connected by a coaxial cable 110a, and the coaxial connector 37 of the second antenna element 3 and the signal analyzer 103 are connected by a coaxial cable 110b. Have been. A device under test 120 such as a portable terminal is arranged on a table 106 installed inside the radio wave anechoic chamber 101.

  The horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under test 120 disposed inside the radio wave anechoic chamber 101 are respectively equal to the first antenna element 2 and the second antenna element 3 of the antenna device 1. Received at the same time. The horizontal polarization component and the vertical polarization component received by the antenna device 1 are sent to the signal analyzer 103 via the coaxial cables 110a and 110b as a first reception signal and a second reception signal, respectively. In the signal analyzer 103, the radio wave transmission characteristics (for example, the frequency spectrum (power or voltage with respect to frequency)) of the device under test 120 are determined based on the first reception signal and the second reception signal received by the signal analyzer 103. Measured. With this configuration, it is possible to simultaneously receive the horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under test 120 and efficiently measure the radio wave transmission characteristics of the device under test 120 based on each polarization component. it can.

[Configuration Example 2 of Measurement Apparatus]
FIG. 16B shows a configuration example 2 of the measuring apparatus 100B according to the present embodiment. The measuring apparatus 100B includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, and a first antenna device 1a and a second , A signal generator 104 connected to the first antenna device 1a, and a signal analyzer 103 connected to the second antenna device 1b.

  The first antenna device 1a is held by a holder 40a, and the second antenna device 1b is held by a holder 40b. The first antenna device 1a is connected to the signal generator 104 by a coaxial cable 111a for a first transmission signal and a coaxial cable 111b for a second transmission signal. The second antenna device 1b is connected to the signal analyzer 103 by a first received signal coaxial cable 110a and a second received signal coaxial cable 110b.

  The first transmission signal and the second transmission signal generated by the signal generator 104 are sent to the first antenna device 1a, and are simultaneously radiated from the first antenna device 1a as horizontal polarization and vertical polarization, respectively. You. The radiated horizontal polarization and vertical polarization are received by a device under test 120 such as a portable terminal installed inside the radio wave anechoic chamber 101. The device under test 120 emits a response radio wave in response to the received horizontal polarization and vertical polarization. Next, the horizontal polarization component and the vertical polarization component of the response radio wave are simultaneously received by the second antenna device 1b, and are sent to the signal analyzer 103 as a first reception signal and a second reception signal, respectively. The signal analyzer 103 measures the radio wave transmission / reception characteristics of the device under test 120 based on the first received signal and the second received signal received by the signal analyzer 103. With this configuration, the radio wave transmission / reception characteristics of the device under test 120 can be measured efficiently.

[Configuration Example 3 of Measurement Apparatus]
FIG. 16C shows a configuration example 3 of the measuring apparatus 100C according to the present embodiment. The measuring apparatus 100C includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, an antenna apparatus 1 provided inside the radio anechoic chamber 101, and an antenna apparatus 1. A signal switch 105 such as a circulator is connected, and a signal generator 104 and a signal analyzer 103 connected to the signal switch 105 are provided.

  The signal generator 104 is connected to the signal switch 105 via a coaxial cable 111a for a first transmission signal and a coaxial cable 111b for a second transmission signal. In addition, the signal analyzer 103 is connected to the signal switch 105 via a coaxial cable 110a for a first received signal and a coaxial cable 110b for a second received signal. Further, the antenna device 1 is connected to the signal switch 105 via a coaxial cable 112a and a coaxial cable 112b. Switching signals by the signal switch 105 enables transmission and reception using one antenna device 1.

  The first transmission signal and the second transmission signal generated by the signal generator 104 are sent to the antenna device 1 via the signal switch 105, and are simultaneously radiated from the antenna device 1 as horizontal polarization and vertical polarization. You. The radiated horizontal polarization and vertical polarization are received by the device under test 120 installed inside the radio wave anechoic chamber 101 and responded by the device under test 120 in response to the received horizontal and vertical polarizations. Radio waves are emitted. Next, the horizontal polarization component and the vertical polarization component of the emitted response radio wave are received by the antenna device 1 and transmitted to the signal analyzer 103 via the signal switch 105 as a first reception signal and a second reception signal. Can be The signal analyzer 103 measures the radio wave transmission / reception characteristics of the device under test 120 based on the received first and second received signals.

[Configuration Example 4 of Measurement Apparatus]
FIG. 17A shows a configuration example 4 of the measuring apparatus 100D according to the present embodiment. The measuring apparatus 100D includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, an antenna device 1 provided inside the radio anechoic chamber 101, and a first transmission unit. The signal generator 104 connected to the antenna apparatus 1 by the coaxial cable 111a for signal and the coaxial cable 111b for second transmission signal, and the measured object installed inside the radio wave anechoic chamber 101 via the coaxial cable 113 And a signal analyzer 103 connected to the device 120.

  The first transmission signal and the second transmission signal generated by the signal generator 104 are sent to the antenna device 1 and are simultaneously radiated from the antenna device 1 as horizontal polarization and vertical polarization, respectively. The radiated horizontal polarization and vertical polarization are received by a device under test 120 such as an antenna installed inside the radio wave anechoic chamber 101. The signal received by the device under test 120 is sent to a signal analyzer 103 such as a spectrum analyzer, and the signal analyzer 103 measures the radio wave reception characteristics of the device under test 120.

[Configuration Example 5 of Measurement Apparatus]
FIG. 17B shows a configuration example 5 of the measuring apparatus 100E according to the present embodiment. The measuring apparatus 100E includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, an antenna device 1 provided inside the radio anechoic chamber 101, and a first reception apparatus. The signal analyzer 103 connected to the antenna device 1 by the signal coaxial cable 110a and the second received signal coaxial cable 110b, and a measured object installed inside the radio anechoic chamber 101 via the coaxial cable 114. And a signal generator 104 connected to the device 120.

  The transmission signal generated by the signal generator 104 is radiated as a radio wave from the device under test 120 such as an antenna, and the horizontal polarization component and the vertical polarization component of the radiated radio wave are simultaneously received by the antenna device 1. The horizontal polarization component and the vertical polarization component received by the antenna device 1 are sent to a signal analyzer 103 such as a spectrum analyzer as a first reception signal and a second reception signal, respectively, and are measured by the signal analyzer 103. The radio wave transmission characteristics of the device 120 are measured.

[Configuration Example 6 of Measurement Apparatus]
FIG. 17C shows a configuration example 6 of the measuring apparatus 100F according to the present embodiment. The measuring apparatus 100F includes a radio anechoic chamber 101, a radio wave absorber 102 provided on the inner wall of the radio anechoic chamber 101, an antenna device 1 provided inside the radio anechoic chamber 101, and a first reception apparatus. A signal analyzer 103 connected to the antenna device 1 by a signal coaxial cable 110a and a second received signal coaxial cable 110b, a positioning device 107 provided inside the radio wave anechoic chamber 101, and a signal line 115 And a controller 108 for controlling the driving of the positioning device 107 through the controller 108.

  The device under test 120 is mounted on the positioning device 107, and the position and direction of the device under test 120 can be freely set by controlling the driving of the positioning device 107 by the controller 108. The horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under test 120 are simultaneously received by the antenna device 1. The horizontal polarization component and the vertical polarization component received by the antenna device 1 are sent to a signal analyzer 103 such as a spectrum analyzer as a first reception signal and a second reception signal, respectively. The radio wave transmission characteristics are measured for each of the 120 arrangements (position and direction).

[Configuration Example 7 of Measurement Apparatus]
FIG. 18 shows a configuration example 7 of the measuring apparatus 100G according to the present embodiment. This measuring device 100G is different from the configuration example 3 in that a positioning device 107 and a controller 108 thereof are provided instead of the table 106 in the configuration example 3, and other configurations are the same as the configuration example 3. The controller 108 controls driving of the positioning device 107 via a signal line 115.

  The device under test 120 is mounted on the positioning device 107, and the position and direction of the device under test 120 can be freely set by controlling the driving of the positioning device 107 by the controller 108.

  The first transmission signal and the second transmission signal generated by the signal generator 104 are sent to the antenna device 1 via the signal switch 105, and are simultaneously radiated from the antenna device 1 as horizontal polarization and vertical polarization. You. The radiated horizontal polarization and vertical polarization are received by the device under measurement 120 installed on the positioning device 107 inside the radio wave anechoic chamber 101, and are received in response to the received horizontal polarization and vertical polarization. A response radio wave is emitted by the measuring device 120. Next, the horizontal polarization component and the vertical polarization component of the emitted response radio wave are received by the antenna device 1 and transmitted to the signal analyzer 103 via the signal switch 105 as a first reception signal and a second reception signal. Can be The signal analyzer 103 measures the radio transmission / reception characteristics for each arrangement (position and direction) of the device under test 120 based on the received first received signal and second received signal.

  FIG. 19 shows measured values of frequency characteristics of the first antenna element and the second antenna element of the antenna device according to the second embodiment. As shown in FIG. 19, the antenna device according to the second embodiment includes an angle θ 1 formed by the first antenna conductor 21 and the second antenna conductor 23 and an angle formed by the third antenna conductor 31 and the fourth antenna conductor 33. It can be seen that by optimizing θ2, both horizontal polarization and vertical polarization can be transmitted and received with the same gain in a wide band.

  As described above, the present invention has an effect that both horizontal polarization and vertical polarization can be simultaneously transmitted or received, and is useful for an antenna device and a measuring device using the antenna device in general. is there.

1, 1A, 1B Antenna device 2, 2A, 2B First antenna element 3, 3A, 3B, 3C, 3D Second antenna element 20 First substrate 20a First surface (one surface of first substrate)
20b Second surface (other surface of first substrate)
20c 1st end face 20d 6th end face 21 1st antenna conductor 22 1st transmission line 23 2nd antenna conductor 24 2nd transmission line 25 1st slot 26 slit 27 coaxial connector 30 2nd substrate 30a 3rd surface (2nd One side of the substrate)
30b 4th surface (one surface of the second substrate)
30c Second end face 30d Third end face 30e Fourth end face 30f Fifth end face 31 Third antenna conductor 32 Third transmission path 33 Fourth antenna conductor 34 Fourth transmission path 35 Second slot 36 Notch 37 Coaxial connector 40, 40a , 40b holder 41, 42, 43, 44 support 45 pedestal 100A, 100B, 100C, 100D, 100E, 100F, 100G measuring device 101 radio anechoic chamber 102 radio wave absorber 103 signal analyzer 104 signal generator 105 signal switch 106 Table 107 Positioning device 108 Controller for positioning device 120 Device to be measured

Claims (12)

A first substrate (20) made of a dielectric, a first antenna conductor (21) provided on one surface (20a) of the first substrate and a second antenna conductor (23) provided on the other surface (20b). ) And a first antenna element (2) having a first slot (25) opening toward a first end surface (20c) of the first substrate;
A second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and a fourth antenna conductor (33) provided on the other surface (30b). ), And a second antenna element (3) having:
The second substrate includes a third end face (30d) and a fourth end face (30e) facing the second end face (30c) , and a second end face including one of the end of the third end face and the end of the fourth end face. 5th end face (30f) , the fourth end face is located between the second end face and the third end face,
At least the fourth end face of the second substrate is inserted into the first slot of the first substrate so that the first substrate and the second substrate intersect ,
The antenna device according to claim 1, wherein the fourth end surface of the second substrate is inclined such that a distance from the second end surface decreases as the distance from the fifth end surface increases . The antenna device according to claim 1, wherein the fifth end surface of the second substrate is in contact with the first substrate . A first substrate (20) made of a dielectric, a first antenna conductor (21) provided on one surface (20a) of the first substrate and a second antenna conductor (23) provided on the other surface (20b). ) And a first antenna element (2) having a first slot (25) opening toward a first end surface (20c) of the first substrate;
A second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and a fourth antenna conductor (33) provided on the other surface (30b). ), And a second antenna element (3) having:
The second substrate has a third end face (30d) and a fourth end face (30e) facing the second end face (30c), and a seventh end face connecting the second end face and the fourth end face. , The fourth end face is located between the second end face and the third end face,
An antenna wherein at least the fourth end face of the second substrate is inserted into the first slot of the first substrate so that the first substrate and the second substrate intersect. apparatus. The antenna device according to claim 3 , wherein the second substrate has a fifth end surface (30f) including either the end of the third end surface or the end of the fourth end surface .   The first antenna conductor and the second antenna conductor are formed by a conductor pattern on the first substrate, and the third antenna conductor and the fourth antenna conductor are formed by a conductor pattern on the second substrate. The antenna device according to claim 1, wherein: A first transmission line (22) formed of a conductor pattern and connected to the first antenna conductor is provided on the one surface of the first substrate, and a conductor pattern is provided on the other surface of the first substrate. A second transmission line (24) formed and connected to the second antenna conductor is provided, and the first transmission line and the second transmission line are opposed to each other across the first substrate;
A third transmission path (32) formed by a conductor pattern and connected to the third antenna conductor is provided on the one surface of the second substrate, and a conductor pattern is formed on the other surface of the second substrate by the conductor pattern. A fourth transmission path (34) formed and connected to the fourth antenna conductor is provided, and the third transmission path and the fourth transmission path are opposed to each other with the second substrate interposed therebetween. The antenna device according to any one of claims 1 to 5, wherein: The first slot is formed by cutting out a portion of the first substrate corresponding to a gap between the first antenna conductor and the second antenna conductor, and has a portion gradually expanding toward the first end surface. And
The second antenna element has a second slot (35) opening toward a second end surface of the second substrate,
The second slot is formed by cutting out a portion of the second substrate corresponding to a gap between the third antenna conductor and the fourth antenna conductor, and facing the second end surface of the second substrate. The antenna device according to any one of claims 1 to 6, further comprising a portion that gradually expands.   The first slot has a slit extending in a direction orthogonal to a sixth end face (20d) facing the first end face from a front end portion (25a) of the portion gradually expanding toward the first end face of the first slot. The antenna device according to claim 7, further comprising (26). The radio anechoic chamber (101), a radio wave absorber (102) provided on an inner wall of the radio anechoic chamber, and a radio anechoic chamber provided inside the radio anechoic chamber. And a signal analyzer (103) connected to the antenna device.
The horizontal polarization component and the vertical polarization component of the radio wave radiated by the device under measurement (120) installed inside the radio anechoic chamber are simultaneously received by the antenna device, and the first reception signal and the second reception signal are respectively received. Is sent to the signal analyzer as a received signal, and the signal analyzer measures a radio wave transmission characteristic of the device under test based on the first received signal and the second received signal. measuring device. The radio anechoic chamber (101), a radio wave absorber (102) provided on an inner wall of the radio anechoic chamber, and a radio anechoic chamber provided inside the radio anechoic chamber. A first antenna device (1a) according to claim 1 and a second antenna device (1b) according to any one of claims 1 to 8, and a signal generator (104) connected to said first antenna device. And a signal analyzer (103) connected to the second antenna device.
A first transmission signal and a second transmission signal generated by the signal generator are sent to the first antenna device and are simultaneously radiated from the first antenna device as horizontal polarization and vertical polarization, respectively. The measured horizontal and vertical polarizations are received by a device under test (120) installed inside the anechoic chamber, and the received signals are received in response to the received horizontal and vertical polarizations. The response radio wave radiated by the measuring device is simultaneously received by the second antenna device as a horizontal polarization component and a vertical polarization component, and sent to the signal analyzer as a first reception signal and a second reception signal, respectively. A signal analyzer for measuring a radio wave transmission / reception characteristic of the device under test based on the first received signal and the second received signal. A first substrate (20) made of a dielectric, a first antenna conductor (21) provided on one surface (20a) of the first substrate and a second antenna conductor (23) provided on the other surface (20b). ) And a first antenna element (2) having a first slot (25) opening toward a first end surface (20c) of the first substrate;
A second substrate (30) made of a dielectric, a third antenna conductor (31) provided on one surface (30a) of the second substrate, and a fourth antenna conductor (33) provided on the other surface (30b). ), And a second antenna element (3) having:
The second substrate has a third end face (30d) facing the second end face (30c),
At least the second substrate is inserted into the first slot so that the first substrate and the second substrate intersect with each other, and a longitudinal direction of the third end face and a longitudinal direction of the second end face are the same as those of the second substrate. An antenna device having a predetermined angle (φ) corresponding to the length of one slot.   The antenna device according to claim 11, wherein a distance (L) from a center (O) of the third end surface to the second end surface is shorter than a length of the first slot.

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