WO2021235133A1 - Dispositif d'antenne, dispositif d'imagerie et procédé de commande - Google Patents

Dispositif d'antenne, dispositif d'imagerie et procédé de commande Download PDF

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Publication number
WO2021235133A1
WO2021235133A1 PCT/JP2021/014990 JP2021014990W WO2021235133A1 WO 2021235133 A1 WO2021235133 A1 WO 2021235133A1 JP 2021014990 W JP2021014990 W JP 2021014990W WO 2021235133 A1 WO2021235133 A1 WO 2021235133A1
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WIPO (PCT)
Prior art keywords
antenna
resonance element
feeding
circuit board
antenna resonance
Prior art date
Application number
PCT/JP2021/014990
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English (en)
Japanese (ja)
Inventor
駿佑 中井
理晃 押方
Original Assignee
ソニーグループ株式会社
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Publication date
Application filed by ソニーグループ株式会社 filed Critical ソニーグループ株式会社
Priority to JP2022524326A priority Critical patent/JPWO2021235133A1/ja
Publication of WO2021235133A1 publication Critical patent/WO2021235133A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • 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
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable

Definitions

  • the present disclosure relates to an antenna device, an image pickup device, and a control method.
  • Patent Document 1 discloses a technique for controlling the frequency characteristics of an antenna by switching a plurality of feeding points (feeding points) provided in advance.
  • Patent Document 1 lacks flexibility because the feeding points are switched discretely.
  • One aspect of the present disclosure is to provide an antenna device, an image pickup device, and a control method capable of flexibly controlling the frequency characteristics of an antenna.
  • the antenna device continuously moves the antenna resonance element, the antenna feeding circuit board that supplies power to the antenna resonance element, and the power feeding point to the antenna resonance element on the antenna resonance element. It is equipped with a power feeding point moving mechanism.
  • the image pickup element, the antenna resonance element, the antenna feeding circuit board for supplying power to the antenna resonance element, and the power feeding point to the antenna resonance element are provided on the antenna resonance element. It is equipped with a power feeding point moving mechanism that moves continuously.
  • the control method includes continuously moving the power supply points from the antenna feeding circuit board to the antenna resonance element on the antenna resonance element.
  • FIG. 1 It is an exploded perspective view which shows the example of the schematic structure of the antenna device which concerns on embodiment. It is a figure which shows the example of the schematic structure of the feeding point moving mechanism and its surroundings. It is a figure which shows the example of the schematic structure of the feeding point moving mechanism and the contact part. It is a figure which shows the example of the schematic structure of the feeding point moving mechanism and the contact part. It is a figure which shows the example of the schematic structure of the feeding point moving mechanism and the contact part. It is a figure which shows the example of the schematic structure of the feeding point moving mechanism and the contact part. It is a figure which shows the example of a non-contact bond. It is a figure which shows the example of the schematic structure of the antenna feeding circuit board.
  • FIG. 1 is an exploded perspective view showing an example of a schematic configuration of an antenna device according to an embodiment. In the figure, the XYZ coordinate system is shown. Each element of the antenna device is shown decomposed in the Z-axis direction.
  • the antenna device 1 shown in FIG. 1 is a device capable of controlling the frequency characteristics of the antenna.
  • the "antenna frequency characteristic" may include various characteristics including the resonance frequency of the antenna, the frequency / antenna radiation efficiency characteristic, and the like.
  • the antenna device 1 shown in FIG. 1 includes an antenna resonance element 10, an antenna feeding circuit board 20, a feeding point moving mechanism 30, and a contact portion 40.
  • the antenna resonance element 10 is a portion (element, radiator) that transmits and receives electromagnetic waves mainly in a frequency band including a resonance frequency.
  • the antenna resonance element 10 is a slot antenna including a main plate 11 provided with a slot 12.
  • the main plate 11 forms the antenna resonance element 10.
  • the main plate 11 has a flat plate shape with the XY plane direction as the plane direction.
  • One surface of the main plate 11 and the other surface are referred to as a front surface 11a and a back surface 11b and are shown.
  • the main plate 11 has conductivity.
  • An example of the material of the main plate 11 is a metal such as magnesium or gold.
  • the slot 12 is provided on the main plate 11.
  • the slot 12 extends to have a length that fits the desired frequency band. Examples of frequency bands are 2.4 GHz band, 5 GHz band, 6 GHz band and the like. Assuming that the wavelength of the center frequency of the frequency band is the wavelength ⁇ , the length of the slot 12 is set to, for example, ⁇ / 2.
  • the slot 12 may be formed by cutting out the main plate 11 (by providing a slit).
  • the slot 12 may be filled with a resin such as plastic. It may be filled with ceramic.
  • the slot 12 is not limited to the rectangular shape as shown in FIG. 1, and may have various shapes. The same applies to the shape of the antenna resonance element 10.
  • the area where power is supplied in the main plate 11 is referred to as a power supply area 13 and is shown in the figure.
  • the power supply region 13 is a set of innumerable power supply location candidates. Of the innumerable power supply location candidates, the position where power is supplied during use (during transmission / reception) is referred to as a power supply location 13a and is illustrated.
  • the feeding point 13a is a feeding point of power from the antenna feeding circuit board 20 to the antenna resonance element 10.
  • the feeding point may be a position on the antenna resonance element 10 that is electrically coupled to the antenna feeding circuit board 20.
  • “Electrically coupled" means that the antenna resonance element 10 and the antenna feeding circuit board 20 are physically connected or electrically connected directly or via other members, and the antenna resonance element.
  • the feeding region 13 is located on the back surface 11b (the surface on the antenna feeding circuit board 20 side) of the main plate 11.
  • the antenna resonance element 10 is a slot antenna
  • the feeding region 13 is located on both sides of the slot 12 (both sides of the slot line).
  • the feeding region 13 extends in the plane direction (X-axis direction and Y direction) of the main plate 11, and therefore has innumerable feeding points continuously in the extending direction.
  • the antenna longitudinal direction (X-axis direction) will be described in particular.
  • the antenna feeding circuit board 20 is equipped with a portion (a contact structure excluding the resonance element) that supplies a transmission signal (may be a transmission signal) to the antenna resonance element 10 and processes the reception signal received by the antenna resonance element 10. It is a general term for the substrates). Examples of the processing of the received signal are detection processing, frequency conversion processing, demodulation processing, and the like of the received signal, and are performed using, for example, RFIC. Processing of the baseband signal after demodulation may also be included in processing of the received signal.
  • the antenna feeding circuit board 20 is provided on the board 21.
  • the substrate 21 has a flat plate shape with the XY plane direction as the plane direction.
  • the front surface 21a of the substrate 21 faces the back surface 11b of the main plate 11. The two faces may be parallel.
  • the substrate 21 may have an insulating property. Examples of the material of the substrate 21 are resin, ceramics and the like.
  • various elements are provided on the substrate 21. Examples of elements are power supplies, frequency conversion circuits, modulation / demodulation circuits, amplifier circuits, filters, switches, transmission lines, and the like.
  • the feeding point moving mechanism 30 continuously moves the feeding point 13a on the antenna resonance element 10 according to various aspects described later.
  • the moving range of the feeding point 13a may correspond to the feeding area 13 described above.
  • the feeding point moving mechanism 30 moves the feeding point 13a by adjusting the positional relationship between the antenna resonance element 10 and the antenna feeding circuit board 20.
  • the feeding point moving mechanism 30 may adjust the positional relationship between the antenna resonance element 10 and the antenna feeding circuit board 20 by moving the antenna feeding circuit board 20.
  • the feeding point moving mechanism 30 may move the antenna feeding circuit board 20 in the direction parallel to the plane (XY plane) formed by the antenna resonance element 10 (X-axis direction and Y-axis direction). , May be moved in the direction perpendicular to the plane (Z-axis direction).
  • the plane formed by the antenna resonance element 10 is a plane including the longitudinal direction (X-axis direction) and the lateral direction (Y-axis direction) of the slot 12.
  • the antenna resonance element 10 has a plate shape, it is a flat surface including the plate-shaped surface (for example, the front surface 11a or the back surface 11b of the main plate 11).
  • the antenna longitudinal direction (X-axis direction) will be described in particular.
  • the feeding point moving mechanism 30 is a deformation mechanism 31. Specifically, four deformation mechanisms 31 are arranged between the main plate 11 and the substrate 21 in the Z-axis direction so as to surround the contact portion 40 described later.
  • the deformation mechanism 31 is configured such that the main plate 11 and the substrate 21 are contact-connected and fixed, for example, and the height (length in the Z-axis direction) can be changed. By changing the height of the deformation mechanism 31, the antenna feeding circuit board 20 moves in the Z-axis direction.
  • Examples of the deformation mechanism 31 are a piezo actuator, an electric actuator, a servo mechanism, and the like. However, various mechanisms other than these may be used as the deformation mechanism 31.
  • the contact portion 40 is provided between the antenna resonance element 10 and the antenna feeding circuit board 20, and is contact-connected to the antenna resonance element 10 and the antenna feeding circuit board 20.
  • the contact portion 40 has conductivity and therefore electrically connects the antenna resonance element 10 and the antenna feeding circuit board 20.
  • one end of the contact portion 40 comes into contact with the feeding region 13. This contact point is the power feeding point 13a.
  • the other end (Z-axis negative direction end) of the contact portion 40 contacts the antenna feeding circuit board 20.
  • the contact portion 40 is a spring 41. Two springs 41 are arranged (fixed) at the output position of the transmission signal on the antenna feeding circuit board 20.
  • the contact portion 40 may be integrally configured with the antenna feeding circuit board 20.
  • the antenna device 1 described above is assembled and used so that the antenna resonance element 10 and the antenna feeding circuit board 20 are connected via the contact portion 40 (spring 41). As a result, the transmission signal from the antenna feeding circuit board 20 is supplied to the feeding point 13a, and the antenna resonance element 10 is excited.
  • the feeding point 13a is moved by the feeding point moving mechanism 30 (deformation mechanism 31) and the contact portion 40 (spring 41). This will be further described with reference to FIG.
  • FIG. 2 is a diagram showing an example of a schematic configuration of a feeding point moving mechanism and its surroundings.
  • FIG. 2 shows the main plate 11, the substrate 21, the deformation mechanism 31, and the spring 41 as viewed from the Y-axis direction.
  • some arrows conceptually indicating the moving (deformation) direction of the deformation mechanism 31 and the spring 41 are shown.
  • the spring 41 is provided between the main plate 11 and the substrate 21.
  • the contact point with the antenna resonance element 10 is in the antenna longitudinal direction (X-axis direction) according to the change in the distance (length in the Z-axis direction) between the antenna resonance element 10 and the antenna feeding circuit board 20. Elastically deforms to move to.
  • the spring 41 has a V-shape that includes a first portion 41a and a second portion 41b.
  • the first portion 41a and the second portion 41b may have a plate shape (see FIG. 1).
  • the first portion 41a is fixed to the substrate 21.
  • the second portion 41b starts from the connection point with the first portion 41a, is inclined in the Z-axis direction, and extends toward the main plate 11.
  • the tip of the first portion 41a comes into contact with the back surface 11b of the main plate 11.
  • the contact point between the first portion 41a and the main plate 11 is the feeding point 13a.
  • the spring 41 is deformed in the direction of the angle ⁇ , and the feeding point 13a, which is the contact point of the first portion 41a with the main plate 11, is on the back surface 11b. It moves continuously in the X-axis direction.
  • the spring 41 may be provided so that the feeding point 13a continuously moves in the Y-axis direction instead of the X-axis direction or together with the X-axis direction. The same applies to the examples of FIGS. 3 to 7 described later.
  • FIGS. 3-6. 3 to 6 are views showing an example of a schematic configuration of a feeding point moving mechanism and a contact portion.
  • the feeding point moving mechanism and the contact portion exemplified in FIG. 3 are a spring 32 and a rotating mechanism 42.
  • the springs 32 are provided on both sides of the substrate 21 so as to expand and contract in the X-axis direction.
  • the substrate 21 moves in the X-axis direction by expanding and contracting the spring 32 by a piston mechanism (not shown) or the like.
  • the rotation mechanism 42 includes a base portion 42a and a rotation portion 42b.
  • the base 42a is fixed on the substrate 21.
  • the rotating portion 42b rotates and moves on the main plate 11 while contacting the back surface 11b of the main plate 11.
  • the rotating portion 42b has, for example, a spherical shape (ball shape).
  • the feeding point moving mechanism and the contact portion exemplified in FIG. 4 are the belt conveyor 33 and the above-mentioned rotating mechanism 42.
  • the belt conveyor 33 supports the back surface 21b of the substrate 21 and moves the substrate 21 in the X-axis direction.
  • the rotation mechanism 42 moves in the X-axis direction together with the substrate 21, the feeding point 13a continuously moves in the X-axis direction on the back surface 11b.
  • the feeding point moving mechanism and the contact portion exemplified in FIG. 5 are a linear motor mechanism 34 and the above-mentioned rotation mechanism 42.
  • the linear motor mechanism 34 includes a magnet 34a and a magnet 34b.
  • the magnet 34a is provided on the back surface 21b of the substrate 21.
  • the magnets 34b are a pair of magnets provided with each other with the magnets 34a interposed therebetween in the X-axis direction.
  • the magnet 34a moves in the X-axis direction.
  • the magnet 34a and the magnet 34b are electromagnets
  • the magnetic field control is electrically controlled.
  • the substrate 21 moves in the X-axis direction together with the magnet 34a, the feeding portion 13a continuously moves in the X-axis direction on the back surface 11b.
  • the contact portion exemplified in FIG. 6 is a spring 43.
  • the spring 43 rotates on the antenna resonance element 10 side starting from the antenna feeding circuit board 20 side so that the contact point with the antenna resonance element 10 moves in the antenna longitudinal direction.
  • a spring 43 also has a function of a feeding point moving mechanism.
  • the spring 43 includes a base 43a and a protrusion 43b.
  • the base portion 43a is fixed to the surface 21a of the substrate 21.
  • the protruding portion 43b can be expanded and contracted in the extending direction thereof, and rotates with the base portion 43a as a starting point while contacting the back surface 11b of the main plate 11. By rotating the protruding portion 43b starting from the base portion 43a, the feeding portion 13a continuously moves on the back surface 11b in the X-axis direction.
  • FIG. 7 is a diagram showing an example of non-contact coupling.
  • FIG. 7 shows how the antenna resonance element 10 and the antenna feeding circuit board 20 are electrically coupled in a non-contact manner.
  • the substrate 21 of the antenna feeding circuit board 20 has a metal pattern 21c.
  • the metal pattern 21c is electrically coupled to the metal portion constituting the antenna resonance element 10 by, for example, capacitive coupling with the antenna resonance element 10.
  • the metal portion constituting the antenna resonance element 10 is the main plate 11.
  • a sheet metal or the like (not shown) provided separately from the main plate 11 may be used as such a metal portion.
  • the position with the strongest bond in this example, the center position of the non-contact bond
  • the feeding point 13a By managing the capacitor component generated between the antenna resonance element 10 (the metal portion constituting the antenna) and the metal pattern 21c, the feeding point 13a can be moved. For example, by moving the substrate 21 using the various feeding point moving mechanisms 30 described so far and changing the facing area, distance, etc. between the antenna resonance element 10 and the metal pattern 21c, the feeding point 13a is X on the back surface 11b. It moves continuously in the axial direction. When the surface of the substrate 21 is covered with a resist or the like to protect it, the resist or the like may be removed (opened) so that the metal pattern 21c is exposed.
  • the frequency characteristic of the antenna resonance element 10 can be flexibly controlled by continuously moving the feeding point 13a.
  • the antenna can radiate at a specific frequency by matching the length of the antenna with the impedance at the feeding point. As the feeding point 13a moves, the frequency at which impedance matching can be achieved changes, and the radiating frequency changes compared to the frequency before the movement.
  • the contact portion 40 may be selected from a plurality of portions (contact portion candidates) that come into contact with the antenna resonance element 10 at different positions.
  • the plurality of portions referred to here are a pair of one or more provided separately from the pair of contact portions 40 shown in FIG. 1, for example. Is the part of.
  • the plurality of portions are one or more portions that are separately provided. A configuration in which the contact portion 40 is selected from a plurality of portions will be described with reference to FIG.
  • FIG. 8 is a diagram showing an example of a schematic configuration of an antenna feeding circuit board.
  • the antenna feeding circuit board 201 shown in FIG. 8 includes switches 261 to 263, a power supply 272, and switches 281 to 283. Further, at the output position of the antenna feeding circuit board 201, springs 411 to 413 are provided as examples of the above-mentioned plurality of portions (candidates for contact portions). In this example, each of the springs 411 to 413 has the same configuration as the spring 41 previously described with reference to FIG.
  • the switch 261 and the power supply 272 and the switch 281 are connected in series between the pair of springs 411.
  • the power supply 272 generates the above-mentioned transmission signal.
  • a switch 262, a power supply 272 and a switch 282 are connected in series between the pair of springs 412.
  • a switch 263, a power supply 272 and a switch 283 are connected in series between the pair of springs 413.
  • the three series connection circuits share only the power supply 272, and the other corresponding portions are provided in parallel with the power supply 272.
  • the springs 411 to 413 are arranged at different positions on the antenna feeding circuit board 201 (for example, on the board 21 of FIG. 1).
  • the pair of springs 411, the pair of springs 412, and the pair of springs 413 may be arranged at different positions in the antenna longitudinal direction (X-axis direction).
  • the connection state between the springs 411 to 413 and the power supply 272 (that is, the contact portion used for power supply) is switched by the switches 261 to 263 and the switches 281 to 283.
  • the contact points between the springs 411 to 413 used for feeding and the main plate 11 function as the contact portion 40 that provides the feeding point 13a.
  • the springs 411 to 413 are arranged at different positions, power is supplied by selecting the spring used for power supply from the springs 411 to 413 (by switching the position of the contact portion 40). The position of the portion 13a can be changed. This further expands the adjustable frequency range.
  • antenna feeding circuit board 201 may also be included in the antenna feeding circuit board 201.
  • Other elements frequency conversion circuit, modulation / demodulation circuit, amplifier circuit, filter, switch, transmission line, etc., which are not shown above.
  • a configuration in which the feeding portion 13a can be switched by a plurality of portions (contact portion candidates) and a configuration in which the feeding portion 13a as described above with reference to FIGS. 1 to 7 can be continuously moved. May be combined as appropriate. This further expands the adjustable frequency range.
  • FIG. 9 is an exploded perspective view showing an example of a schematic configuration of an antenna device capable of switching the antenna length.
  • the antenna device shown in FIG. 9 is also referred to as an antenna device 1 as in FIG. 1 described above.
  • the antenna device 1 shown in FIG. 9 is different from the case of FIG. 1 in that it further includes an antenna length switching circuit 50.
  • the antenna length switching circuit 50 is connected to the antenna resonance element 10.
  • the portion of the main plate 11 to which the antenna length switching circuit 50 is connected is referred to as a contact 14 and is shown in the figure.
  • the contacts 14 are located on both sides of the slot 12 on the back surface 11b of the main plate 11.
  • the contact 14 is located, for example, near the center (including the center) of the slot 12 in the direction of the X axis.
  • the antenna length switching circuit 50 switches the electrical length of the antenna resonance element 10.
  • the switching of the electrical length is performed by switching at least one of the physical length and the electrical length.
  • the antenna length switching circuit 50 may be a variable impedance circuit, and in that case, the electrical length of the antenna resonance element 10 changes due to the change in the impedance of the antenna length switching circuit 50.
  • FIG. 9 shows the substrate 51 and the contact terminal 52 among the components of the antenna length switching circuit 50.
  • the contact terminal 52 contacts the contact 14 of the antenna resonance element 10, whereby the antenna length switching circuit 50 is connected to the antenna resonance element 10.
  • the contact terminal 52 is a conductive probe having elastic elasticity in the Z-axis direction.
  • various elements (not shown) constituting the antenna length switching circuit 50 are provided on the substrate 51.
  • One surface and the other surface of the substrate 51 are referred to as a front surface 51a and a back surface 51b and are shown.
  • An example of the configuration of the antenna length switching circuit 50 will be described with reference to FIGS. 10 and 11.
  • FIG. 10 is a diagram showing an example of a schematic configuration of an antenna length switching circuit.
  • the antenna length switching circuit 501 shown in FIG. 10 includes a contact terminal 521, a switch 561, a switch 571, and a reactance 581.
  • the contact terminal 521 has the same configuration as the contact terminal 52 described above with reference to FIG.
  • the reactance 581 may be either an inductor or a capacitor, or may include both an inductor and a capacitor.
  • the reactance 581 may be a variable reactance.
  • a switch 561, a switch 571 connected in series, and a reactance 581 are connected in parallel between the pair of contact terminals 521.
  • the switch 561 and the switch 571 switch the connection state between the pair of contact terminals 521 (that is, the impedance between the contacts 14 on both sides of the slot 12).
  • the switch 561 When the switch 561 is ON, the contact terminals 521 are short-circuited, and therefore the antenna resonant element 10 has an electrical length given by the length from the feeding point 13a to the contact 14.
  • the switch 571 When the switch 571 is ON (the switch 561 is OFF), the circuit impedance (reactance 581) appears at the contact terminal 521. Therefore, the antenna resonance element 10 has the reactance 581 connected in parallel to the slot line (connected to the shunt). Has an electrical length given by.
  • FIG. 11 is a diagram showing an example of a schematic configuration of an antenna length switching circuit.
  • the antenna length switching circuit 502 shown in FIG. 11 includes contact terminals 522 to 524, switches 562 to switch 564, reactances 572, and switches 582 to 584.
  • the contact terminals 522 to 524 have the same configuration as the contact terminals 52 described above with reference to FIG.
  • a switch 562 a reactance 572 and a switch 582 are connected in series between the pair of contact terminals 522.
  • a switch 563, a reactance 572 and a switch 583 are connected in series between the pair of contact terminals 523.
  • a switch 564, a reactance 572 and a switch 584 are connected in series between the pair of contact terminals 524.
  • the three series connection circuits share only the reactance 572, and the other corresponding portions are provided in parallel with the reactance 572.
  • the contact terminals 522 to 524 are arranged at different positions (on the substrate 51) of the antenna length switching circuit 50.
  • the pair of contact terminals 522, the pair of contact terminals 523, and the pair of contact terminals 524 may be arranged at different positions in the longitudinal direction of the antenna.
  • connection state (contact terminal used for switching the electrical length of the antenna resonance element 10) between the contact terminals 522 to the contact terminals 524 and the reactance 57 is switched by the switches 562 to 564 and the switches 582 to 584. That is, a contact terminal in which the impedance (for example, reactance 572) of the antenna length switching circuit 501 appears is selected from the contact terminals 522 to 524. As described above, the contact terminals 522 to the contact terminals 524 are arranged at different positions. By switching the contact terminal used for switching the electrical length of the antenna resonance element 10, the position of the reactance 572 connected in parallel to the antenna resonance element 10 can be changed. Thereby, the electric length of the antenna resonance element 10 can be adjusted more finely.
  • the configurations shown in FIGS. 10 and 11 described above may be used in combination as appropriate.
  • the feeding point 13a is changed (continuous movement and switching) by the antenna feeding circuit board 20, the feeding point moving mechanism 30 and the contact portion 40, but also the electric length of the antenna resonance element 10 is switched by the antenna length switching circuit 50.
  • the frequency characteristic of the antenna resonance element 10 can be controlled more flexibly. Since the frequency of the slot antenna of the electrical length of the antenna resonance element 10 is approximately determined by ⁇ / 2, the slot length can be electrically shortened by short-circuiting the middle of the antenna or inserting a reactance, and the frequency can be reduced. It can be changed significantly.
  • the antenna device 1 described above is assembled and used so that the antenna resonance element 10 and the antenna length switching circuit 50 are further connected as compared with the case of FIG. 1 described above.
  • the antenna feeding circuit board 20 is used for fine-tuning the frequency characteristics of the antenna resonance element 10 (for example, changing to a different channel in the same frequency band, securing a bandwidth, etc.). This is because fine control of the feeding point 13a is easy.
  • An example of fine-tuning the frequency response is a change to a different channel (each channel in the 5 GHz band) within the same frequency band.
  • the antenna length switching circuit 50 is used for significantly adjusting the frequency characteristics of the antenna resonance element 10 (for example, changing to a different frequency band). This is because it is easy to significantly switch the electrical length of the antenna resonance element 10.
  • An example of a large adjustment of the frequency characteristic is a change to a different frequency band (2.4 GHz band, 5 GHz band, etc.).
  • the antenna feeding circuit board 20 and the antenna length switching circuit 50 may be appropriately used depending on the degree of adjustment of the frequency characteristics of the antenna resonance element 10 required.
  • the frequency characteristics of the antenna resonance element 10 can be controlled more flexibly.
  • a method of finely adjusting the frequency characteristics by moving the feeding point 13a on the antenna feeding circuit board 20 or the like may be referred to as a “feed moving method”.
  • a method of switching the electric length of the antenna resonance element 10 by the antenna length switching circuit 50 to significantly adjust the frequency characteristics may be referred to as a “shunt method”.
  • the shunt system configuration includes a reactance (inductor and / or a capacitor) switchable as described above with reference to FIGS. 10 and 11, as a filter.
  • a configuration including reactance a configuration including LPF and HPF as a filter for switching a feeding point, and the like.
  • the antenna device 1 may include a hybrid configuration in which these various configurations are combined.
  • FIGS. 12 to 15 are diagrams conceptually showing an example of the frequency characteristics of the antenna resonance element.
  • the horizontal axis of the graph shows the frequency, and the vertical axis shows the antenna radiation efficiency.
  • the broken line graph line SET_A, graph line SET_B and graph line SET_C show the antenna radiation efficiency of the three antenna resonance elements having individual variations.
  • each frequency characteristic by, for example, a feed movement method, it is possible to align the frequency characteristics with the frequency characteristics indicated by the solid graph line SET_ABC. In this way, the frequency deviation caused by individual variation can be calibrated to an appropriate frequency.
  • the broken line graph line BW shows the antenna radiation efficiency of the frequency characteristic covering the entire certain frequency band (for example, 5 GHz band).
  • the solid graph line CH_A and the graph line CH_B indicate the antenna radiation efficiency of the frequency characteristic covering a part of the channels in the frequency band. With frequency characteristics that cover a wide area as shown in graph line BW, antenna radiation efficiency is generally low. Instead, by fine-tuning the frequency characteristics covering some channels, for example by feed transfer schemes, greater antenna radiation efficiency as shown in graph line CH_A and graph line CH_B can be obtained. This is useful when other channels are congested and the transfer rate is low.
  • the graph line BW in FIG. 13 indicates the antenna radiation efficiency in a wide frequency band including a plurality of bands (for example, including a 5 GHz band and a 6 GHz band). That is, the antenna radiation efficiency of the frequency characteristic covering the entire graph line BW becomes low as a whole.
  • a specific band for example, 6 GHz band
  • a feed movement method by, for example, a feed movement method, a larger antenna radiation efficiency can be obtained. This is useful when other bands (for example, 5 GHz band) are congested and the transfer rate is low. Similar control can be performed by adjusting the frequency characteristics by the shunt method.
  • the solid graph line N indicates the antenna radiation efficiency at normal times.
  • the broken line graph line D shows the antenna radiation efficiency when deteriorated due to the influence of a nearby object (human body or the like). Examples of the effects of nearby objects are frequency shifts and reduced antenna radiation efficiency. For example, by fine-tuning the frequency characteristics by the feed movement method, the reduced antenna radiation efficiency as shown in the graph line D can be returned to the antenna radiation efficiency shown in the graph line N again.
  • the graph line BW1 shows the antenna radiation efficiency of the frequency characteristic covering the entire wave number band (for example, 2.4 GHz band).
  • the graph line BW2 shows the antenna radiation efficiency of the frequency characteristic covering the whole of another frequency band (for example, 5 GHz band).
  • FIG. 16 is an example of a block diagram of the antenna device.
  • the antenna device 1 includes a detection circuit 60 and a control unit 70 in addition to the antenna resonance element 10, the antenna feeding circuit board 20, the feeding point moving mechanism 30, the contact portion 40, and the antenna length switching circuit 50 described so far.
  • the detection circuit 60 and the control unit 70 are provided on, for example, the substrate 21. The detection circuit 60 and the control unit 70 will be further described.
  • the detection circuit 60 detects the state of the antenna device 1. The detection circuit 60 will be further described with reference to FIG.
  • FIG. 17 is an example of a block diagram of the detection circuit 60.
  • the detection circuit 60 includes a feedback circuit 61, a proximity sensor circuit 62, a reception level detection circuit 63, and a mode selection circuit 64.
  • the feedback circuit 61 measures the state of the antenna resonance element 10 and outputs the measurement result.
  • An example of the output of the feedback circuit 61 is information indicating the intensity (magnitude) and / or phase of the reflection coefficient (ratio of the reflected power to the input power, generally described by S11 or return loss) of the antenna resonance element 10.
  • the target frequency is not limited to the frequency of a specific point, and may mean a frequency range (target channel) including the frequency.
  • the suitable state is, for example, a state in which the reflectance coefficient is in a range smaller than a predetermined value (including the minimum value).
  • various known circuits may be adopted.
  • the proximity sensor circuit 62 detects an object (proximity object) close to the antenna resonance element 10 and outputs the detection result.
  • the object may be an object that can affect the frequency characteristics of the antenna resonance element 10 (frequency shift, decrease in antenna radiation efficiency, etc.), and is, for example, a part of the user's body (for example, a finger).
  • An example of the output of the proximity sensor circuit 62 is the positional relationship (distance, direction, etc.) between the antenna resonance element 10 and the object. It is advisable to calibrate the proximity sensor circuit 62 in advance so that the detection result of the proximity sensor circuit 62 indicates the positional relationship between the antenna resonance element 10 and the object.
  • various known circuits may be proximity sensors
  • the reception level detection circuit 63 detects the reception level of the antenna resonance element 10 and outputs the detection result.
  • the reception level is information indicating the strength of the reception sensitivity (may be the strength of the received signal).
  • various known circuits may be adopted.
  • the mode selection circuit 64 accepts the mode selection and outputs the mode selection result.
  • the mode selection includes the selection of the communication mode using the antenna resonance element 10. Examples of modes are distance priority mode and speed priority mode. When the distance priority mode is selected, a frequency band in which the communication distance becomes long (for example, 2.4 GHz band out of 2.4 GHz band and 5 GHz band) is selected. When the speed priority mode is selected, a frequency band in which the communication speed becomes high (for example, the 2.4 GHz band and the 5 GHz band among the 5 GHz bands) is selected.
  • Another example of the mode is an indoor mode and an outdoor mode. For example, when the indoor mode is selected, a frequency band in which the communication speed is increased is selected.
  • the mode selection may be performed by a user operation.
  • the user operation may be performed via a display UI realized by software, or may be performed by a physical UI (for example, manual dialing or the like).
  • control unit 70 controls the antenna device 1 based on the detection result of the detection circuit 60.
  • the control unit 70 controls the feeding point moving mechanism 30, each switch of the antenna feeding circuit board 20 (switch 261 and the like in FIG. 8), and each switch of the antenna length switching circuit 50 (switch 561 and the like in FIG. 10 and FIG. 11). Switch 562 etc.) and variable reactance control.
  • the control unit 70 may be configured to include a CPU (Central Processing Unit) and the like. For control, a driver or the like (not shown) necessary for driving the feeding point moving mechanism 30 may be used.
  • the control unit 70 may set a required frequency adjustment amount from the output of the detection circuit 60, and may use the feed movement method and the shunt method properly according to the frequency adjustment amount.
  • a required frequency adjustment amount for example, an algorithm for obtaining the frequency adjustment amount from the output result of the detection circuit 60, table data, or the like may be used.
  • the feed movement method may be used when the frequency adjustment amount is relatively small, and the shunt method may be used when the frequency adjustment amount is relatively large.
  • a threshold value determination may be used to determine the magnitude of the frequency adjustment amount.
  • the control unit 70 may use the feed movement method and the shunt method properly according to the state of the antenna device 1 grasped from the detection result of the detection circuit 60, regardless of the frequency adjustment amount.
  • Examples of the state of the antenna device 1 are individual variation, a decrease in antenna radiation efficiency due to proximity to the human body, a decrease in transfer rate due to being in a congested environment, and a transfer mode switching state. These are grasped from the outputs of the feedback circuit 61, the proximity sensor circuit 62, the reception level detection circuit 63, and the mode selection circuit 64 described above.
  • individual variation, deterioration of antenna radiation efficiency due to proximity to the human body, and decrease in transfer rate due to a congested environment can be dealt with by the feed movement method.
  • control unit 70 uses the feed movement method. It may be used to control the frequency characteristic of the antenna resonance element 10. Since the transfer mode switching state can be dealt with by the shunt method, in this case, the control unit 70 may control the frequency characteristic of the antenna resonance element 10 by using the shunt method.
  • the control unit 70 may control the frequency characteristics of the antenna resonance element 10 so that the output of the feedback circuit 61 is in an optimum state at the target frequency.
  • An example of the optimum state is a state in which the reflectance coefficient is in a range smaller than a predetermined value (including the minimum value) as described above.
  • the frequency characteristic of the antenna resonance element 10 is controlled so that the reflection coefficient is equal to or less than the threshold value.
  • the threshold value is appropriately determined according to the communication performance required for the antenna resonance element 10.
  • the communication performance may be determined according to a request such as an amount of transmission data and a time related to transmission.
  • the frequency characteristic of the antenna resonance element 10 may be searched and controlled so that the reflection coefficient becomes the minimum.
  • a data table describing the relationship between the target frequency and the position of the feeding point 13a and / or the state of the antenna feeding circuit board 20 (switch state, etc.) may be prepared. Such a data table may be created based on experimental data, design data, and the like.
  • the control unit 70 can control the frequency characteristics of the antenna resonance element 10 based on the output result of the feedback circuit 61 and the data table.
  • the control unit 70 may control the frequency characteristics of the antenna resonance element 10 so as to reduce the influence of nearby objects.
  • the control unit 70 controls the frequency characteristics of the antenna resonance element 10 according to the positional relationship between the antenna resonance element 10 and the proximity object shown in the output result of the proximity sensor circuit 62.
  • a data table may be prepared in which the position of a nearby object is associated with the position of the feeding point 13a that can reduce the influence of the nearby object and / or the state of the antenna feeding circuit board 20 (switch state, etc.). ..
  • Such data tables can be created based on experimental data, design data, etc.
  • the control unit 70 can control the frequency characteristics of the antenna resonance element 10 based on the output result of the proximity sensor circuit 62 and the data table. In such control, fine adjustment of the frequency characteristic by the feed movement method may be particularly effective.
  • the control unit 70 may control the frequency characteristics of the antenna resonance element 10 so that the reception level is improved.
  • the control unit 70 controls the frequency characteristic of the antenna resonance element 10 so that the reception level of the antenna resonance element 10 shown in the output result of the reception level detection circuit 63 becomes large.
  • the frequency characteristic of the antenna resonance element 10 is controlled so that the reception level becomes equal to or higher than the threshold value.
  • the threshold value is appropriately determined according to the communication performance required for the antenna resonance element 10.
  • the communication performance may be determined according to a request such as an amount of transmission data and a time related to transmission.
  • the frequency characteristic of the antenna resonance element 10 may be searched and controlled so as to maximize the reception level.
  • the control unit 70 may control the frequency characteristics of the antenna resonance element 10 according to the mode selection result.
  • the control unit 70 controls the frequency characteristics of the antenna resonance element 10 according to the mode selection result shown in the output result of the mode selection circuit 64.
  • the frequency characteristic of the antenna resonance element 10 is controlled so as to match the frequency band in which the communication distance becomes long.
  • the frequency characteristic of the antenna resonance element 10 is controlled so as to match the frequency band in which the communication speed becomes high. In such control, it may be particularly effective to make a large adjustment of the frequency characteristics by the shunt method.
  • control of the frequency characteristics of the antenna resonance element 10 by the control unit 70 described above may be used in combination as appropriate.
  • the control by the control unit 70 may include a control using AI (Artificial Intelligence).
  • AI Artificial Intelligence
  • the trained model generated by using the training data is used so as to output the data corresponding to the control content by the control unit 70. You can do it.
  • FIG. 18 is a flowchart showing an example of processing (control method) executed in the antenna device.
  • a feed moving method more specifically, an antenna feeding circuit board 20, a feeding point moving mechanism 30 (deformation mechanism 31), and a contact portion 40 (spring 41) ( The frequency characteristics of the antenna resonance element 10 are controlled using FIG. 1).
  • step S11 the detection result of the proximity sensor is acquired.
  • the control unit 70 acquires the positional relationship between the antenna resonance element 10 and the proximity object shown in the output result of the proximity sensor circuit 62 of the detection circuit 60.
  • step S12 it is determined whether or not the objects are in close proximity.
  • the control unit 70 determines that the objects are close to each other when the distance shown in the detection result acquired in the previous step S11 is equal to or less than a predetermined distance. Examples of predetermined distances are several mm to several tens of mm, several cm to several tens of cm, and the like.
  • predetermined distances are several mm to several tens of mm, several cm to several tens of cm, and the like.
  • step S13 the moving distance is set.
  • the control unit 70 sets the moving distance of the feeding point 13a according to the distance acquired in the previous step S11.
  • step S14 the antenna feeding circuit board moves.
  • the control unit 70 moves the substrate 21 of the antenna feeding circuit board 20 in the Z-axis direction by controlling the feeding point moving mechanism 30 (deformation mechanism 31).
  • step S15 the spring is deformed and the feeding point moves.
  • the spring 41 (FIGS. 1 and 2) is deformed, whereby the feeding point 13a moves.
  • the frequency characteristics of the antenna resonance element 10 change.
  • step S15 After the process of step S15 is completed, the process is returned to step S11.
  • the frequency characteristics of the antenna resonance element 10 controlled according to the detection of a nearby object can be obtained in a timely manner.
  • FIG. 19 is a flowchart showing an example of a process (control method) executed in the antenna device.
  • the feed moving method more specifically, the antenna feeding circuit board 20, the feeding point moving mechanism 30 (spring 32) and the contact portion 40 (rotating mechanism 42) (FIG. 3).
  • the frequency characteristic of the antenna resonance element 10 is controlled by using the above.
  • step S21 the output of the feedback circuit is acquired.
  • the control unit 70 acquires the reflection coefficient of the antenna resonance element 10.
  • step S22 it is determined whether or not it is necessary to change the feeding point.
  • the control unit 70 determines that the feeding point needs to be changed when the reflection coefficient shown in the output of the feedback circuit 61 acquired in the previous step S21 is larger than a predetermined value.
  • step S22: Yes the process proceeds to step S23. If not (step S22: No), the process is returned to step S21.
  • step S23 the moving distance is set.
  • the control unit 70 sets the moving distance of the feeding point 13a for making the reflection coefficient shown in the output of the feedback circuit 61 smaller than a predetermined value.
  • step S24 the antenna feeding circuit board moves.
  • the control unit 70 moves the substrate 21 of the antenna feeding circuit board 20 in the X-axis direction by controlling the feeding point moving mechanism 30 (spring 32).
  • step S25 the rotation mechanism rotates and the feeding point moves.
  • the rotation mechanism 42 rotates and moves in the X-axis direction together with the board 21 of the antenna feeding circuit board 20, whereby the feeding point 13a moves.
  • the frequency characteristics of the antenna resonance element 10 change.
  • step S25 After the process of step S25 is completed, the process is returned to step S21.
  • FIG. 20 is a flowchart showing an example of a process (control method) executed in the antenna device.
  • the mode selection manual selection
  • the frequency characteristic of the antenna resonance element 10 is controlled by the shunt method, more specifically, the antenna length switching circuit 50 (FIG. 9).
  • step S31 the selection mode is acquired.
  • the control unit 70 acquires the mode selection result shown in the output result of the mode selection circuit 64 of the detection circuit 60.
  • step S32 the type of mode is determined.
  • the control unit 70 determines whether the mode acquired in the previous step S31 is the distance priority mode or the speed priority mode. In the distance priority mode, the process proceeds to step S33. In the speed priority mode, the process proceeds to step S36.
  • step S33 the electrical length of the antenna is set.
  • the control unit 70 sets the state of the antenna length switching circuit 50 for adapting the frequency characteristics of the antenna resonance element 10 to the low frequency band (for example, 2.4 GHz band) for long-distance communication.
  • the low frequency band for example, 2.4 GHz band
  • step S34 the state of the antenna length switching circuit 50 is switched.
  • the control unit 70 controls the antenna length switching circuit 50 so that the impedance of the antenna length switching circuit 50 becomes almost infinite (open state).
  • the electric length of the antenna resonance element 10 becomes long, and the frequency characteristic of the antenna resonance element 10 changes so as to match the low frequency band.
  • step S35 the electrical length of the antenna is set.
  • the control unit 70 sets the state of the antenna length switching circuit 50 for adapting the frequency characteristics of the antenna resonance element 10 to the high frequency band (for example, 5 GHz band) for high-speed communication.
  • the high frequency band for example, 5 GHz band
  • step S36 the state of the antenna length switching circuit 50 is switched.
  • the control unit 70 controls the antenna length switching circuit 50 so that the impedance of the antenna length switching circuit 50 becomes almost 0 (short state).
  • the electric length of the antenna resonance element 10 is shortened, and the frequency characteristics of the antenna resonance element 10 are changed so as to match the high frequency band. Change.
  • step S35 or step S36 After the processing of step S35 or step S36 is completed, the processing is returned to step S31.
  • FIG. 21 is a flowchart showing an example of a process (control method) executed in the antenna device.
  • the feed movement method and the shunt method are used properly according to the frequency adjustment amount.
  • step S41 the output of the detection circuit is acquired.
  • the outputs of the feedback circuit 61, the proximity sensor circuit 62, the reception level detection circuit 63, and the mode selection circuit 64 of the detection circuit 60 are acquired.
  • step S42 it is determined whether or not the frequency adjustment amount is less than the threshold value. For example, the control unit 70 sets a required frequency adjustment amount from the output of the detection circuit acquired in the previous step S41, and compares it with a predetermined threshold value. If the frequency adjustment amount is less than the threshold value (step S42: Yes), the process proceeds to step S43. If not (step S42: No), the process proceeds to step S44.
  • step S43 the frequency characteristics are controlled using the feed movement method.
  • the control unit 70 controls the frequency characteristic of the antenna resonance element 10 by using the feed movement method so that the frequency adjustment amount used for the determination in the previous step S42 can be obtained.
  • step S44 the frequency characteristics are controlled using the shunt method.
  • the control unit 70 controls the frequency characteristic of the antenna resonance element 10 by using the shunt method so that the frequency adjustment amount used for the determination in the previous step S42 can be obtained.
  • step S43 or step S44 After the processing of step S43 or step S44 is completed, the processing is returned to step S41.
  • the frequency of the antenna resonance element 10 controlled by either the feed movement method or the shunt method depending on whether the frequency adjustment amount (frequency movement width) is large or not. The characteristics are obtained in a timely manner.
  • FIG. 22 is a flowchart showing an example of a process (control method) executed in the antenna device.
  • the feed movement method and the shunt method are used properly according to the state of the antenna device 1 grasped from the detection result of the detection circuit 60, regardless of the frequency adjustment amount as shown in FIG. 21.
  • step S51 the output of the detection circuit is acquired.
  • the outputs of the feedback circuit 61, the proximity sensor circuit 62, the reception level detection circuit 63, and the mode selection circuit 64 of the detection circuit 60 are acquired.
  • step S52 the frequency characteristics are controlled using a method according to the output of the detection circuit.
  • the control unit 70 properly uses the feed movement method and the shunt method according to the state of the antenna device 1 grasped from the detection result of the detection circuit 60 acquired in the previous step S51.
  • Examples of the state of the antenna device 1 are, as described above, individual variation, a decrease in antenna radiation efficiency due to proximity to the human body, a decrease in transfer rate due to being in a congested environment, and a transfer mode switching state. ..
  • the individual variation, the deterioration of the antenna radiation efficiency due to the proximity of the human body, and the decrease in the transfer rate due to the state of the congested environment can be dealt with by the feed movement method.
  • control unit 70 uses the feed movement method.
  • the frequency characteristic of the antenna resonance element 10 may be controlled. Since the transfer mode switching state can be dealt with by the shunt method, in this case, the control unit 70 may control the frequency characteristic of the antenna resonance element 10 by using the shunt method.
  • step S52 After the process of step S52 is completed, the process is returned to step S51.
  • the frequency characteristics of the antenna resonance element 10 controlled according to the state of the antenna device 1 grasped from the detection result of the detection circuit 60 can be obtained in a timely manner.
  • the present disclosure is not limited to the above embodiments.
  • the antenna feeding circuit board 20 is moved by the feeding point moving mechanism 30 .
  • the antenna resonance element 10 may move in place of the antenna feeding circuit board 20 or together with the antenna feeding circuit board 20.
  • Various methods (such as modifications of the feeding point moving mechanism 30) that enable such movement may be used.
  • a slot antenna has been described as an example as an antenna.
  • various antennas patch antenna, notch antenna, etc.
  • other than the slot antenna may be used.
  • the antenna resonance element 10 includes one antenna.
  • the antenna resonance element 10 may include a plurality of antennas.
  • the antenna device 1 described above may be incorporated into an electronic device or the like and used.
  • An example of an electronic device is an image pickup device.
  • the image pickup device may include an image pickup element such as a CCD or CCMOS, a data processing unit for processing the image pickup result of the image pickup element, an output unit for outputting (including display) the processing result, an operation unit for receiving a user operation, and the like.
  • the image pickup apparatus may also be provided with a housing that accommodates at least a part of these.
  • the antenna resonance element 10 may be configured by using a part of the housing of the image pickup apparatus. For example, by cutting out a part of a metal housing to form a slot antenna, the portion of the housing provided with the slot antenna can be used as the antenna resonance element 10.
  • the antenna feeding circuit board 20 may be provided in the housing. The same applies to the other feeding point moving mechanism 30, the contact portion 40, the antenna length switching circuit 50, the detection circuit 60, the control unit 70, and the like.
  • various information obtained from the image pickup result of the image pickup element can be transmitted by using the antenna resonance element 10.
  • the frequency characteristic of the antenna resonance element 10 at that time can be flexibly controlled as described above.
  • the antenna device 1 includes an antenna resonance element 10, an antenna feeding circuit board 20, and a feeding point moving mechanism 30.
  • the antenna feeding circuit board 20 supplies electric power to the antenna resonance element 10.
  • the feeding point moving mechanism 30 continuously moves the feeding point 13a on the antenna resonance element 10.
  • the feeding point 13a is a point where power is supplied to the antenna resonance element 10.
  • the antenna device 1 by continuously moving the feeding points 13a, it is possible to flexibly control the frequency characteristics of the antenna resonance element 10 as compared with the case where the feeding points are switched discretely, for example.
  • the switch, lumped constant element, etc. used for discretely switching the feeding points are not required, the loss can be reduced and a highly efficient antenna can be realized. Since the electrical coupling is not interrupted even when the feeding point 13a is moved, the feeding point 13a can be automatically moved, for example, to tune the frequency characteristics during transmission / reception.
  • the feeding point moving mechanism 30 adjusts the positional relationship between the antenna resonance element 10 and the antenna feeding circuit board 20 to feed the feeding point 13a. May be moved.
  • the feeding point moving mechanism 30 (deformation mechanism 31) as described with reference to FIGS. 1 and 2 may move the feeding point 13a by moving the antenna feeding circuit board 20.
  • the feeding point moving mechanism 30 (spring 32, belt conveyor 33, and linear motor mechanism 34) as described with reference to FIGS. 3 to 5 and the like moves the antenna feeding circuit board 20 to feed the feeding point 13a. May be moved.
  • the feeding point 13a can be continuously moved in this way.
  • the antenna device 1 may further include a contact portion 40.
  • the contact portion 40 may be provided between the antenna resonance element 10 and the antenna feeding circuit board 20 and may come into contact with the antenna resonance element 10 and be integrally configured with the antenna feeding circuit board 20.
  • the contact point between the antenna resonance element 10 and the contact portion 40 is the feeding point 13a.
  • the feeding point 13a can be provided by the electrical connection between the antenna resonance element 10 and the antenna feeding circuit board 20 via the contact portion 40.
  • the feeding point moving mechanism 30 has the antenna feeding circuit board 20 in the direction perpendicular to the plane (XY plane) formed by the antenna resonance element 10 (Z-axis direction). ),
  • the spring 41 may be elastically deformed so that the contact point with the antenna resonance element 10 moves according to the change in the distance between the antenna resonance element 10 and the antenna feeding circuit board 20.
  • the spring 41 has a configuration in which the inclination angle ⁇ can be changed with respect to the plane (XY plane) formed by the antenna feeding circuit board 20, and the inclination angle ⁇ changes according to the change in the distance. It's okay.
  • the spring 41 is a second portion that is inclined and extends in the vertical direction (Z-axis direction) starting from the connection point between the first portion 41a fixed to the antenna resonance element 10 and the first portion 41a.
  • the portion 41b is provided, and the angle of inclination ⁇ may be the angle of inclination of the second portion 41b with respect to the plane (XY plane) configured by the antenna feeding circuit board 20.
  • the rotation mechanism 42 contacts the base portion 42a connected to the antenna feeding circuit board 20 and the antenna resonance element 10 at the feeding point 13a, and contacts the base portion 42a.
  • a rotating portion 42b having a rotatable structure may be provided.
  • a rotating portion 42b having a rotatable structure may be provided.
  • the spring 43 may rotate on the antenna resonance element 10 side starting from the antenna feeding circuit board 20 side so that the contact point with the antenna resonance element 10 moves. ..
  • the feeding point 13a can be continuously moved. Since the feeding point 13a can be moved without moving the antenna feeding circuit board 20, the moving space of the antenna feeding circuit board 20 can be eliminated. Further, friction can be reduced by interposing a rotational movement like the rotation mechanism 42 and the spring 43.
  • the contact portion 40 may be selected from a plurality of springs 411 to 413 that come into contact with the antenna resonance element 10 at different positions. By changing the position of the feeding point 13a by using the plurality of springs 411 to 413, the adjustable frequency range is further expanded.
  • the antenna feeding circuit board 20 may have a metal pattern 21c that is non-contact coupled with a metal portion (such as a main plate 11 or another sheet metal) constituting the antenna resonance element 10. ..
  • the position of the non-contact coupling (for example, the center position) is the feeding point 13a.
  • the antenna device 1 may further include a detection circuit 60 and a control unit 70.
  • the detection circuit 60 may detect the state of the antenna device 1.
  • the control unit 70 may control the feeding point moving mechanism 30 based on the detection result of the detection circuit 60.
  • the detection circuit 60 may detect the reflection coefficient of the antenna resonance element 10, an object close to the antenna resonance element 10, the reception level of the antenna resonance element 10, selection of a communication mode using the antenna resonance element 10, and the like. Thereby, the frequency characteristic of the antenna resonance element 10 can be flexibly controlled according to various states of the antenna device 1.
  • the antenna resonance element 10 may be a slot antenna. This makes it possible to flexibly control the frequency characteristics of the slot antenna.
  • the antenna device 1 may further include an antenna length switching circuit 50 for switching the electrical length of the antenna resonance element 10.
  • an antenna length switching circuit 50 for switching the electrical length of the antenna resonance element 10.
  • the electric length of the antenna resonance element 10 can also be switched, and the frequency characteristic of the antenna resonance element 10 can be controlled more flexibly.
  • This effect is a hybrid configuration that combines the control (fine adjustment) of the frequency characteristics of the antenna resonance element 10 by the movement of the feeding point 13a and the control (significant adjustment) of the frequency characteristics of the antenna resonance element 10 by the antenna length switching circuit 50. By doing so, it becomes more apparent.
  • the antenna length switching circuit 501 may be a variable impedance circuit.
  • the electrical length of the antenna resonance element 10 can be changed by changing the impedance of the antenna length switching circuit 501.
  • the antenna length switching circuit 502 may include contact terminals 522 to contact terminals 524, and switches 562 to switch 564 and 582 to switch 584.
  • the contact terminals 522 to 524 come into contact with the antenna resonance element 10 at different positions.
  • the switch 562 to the switch 564 and the 582 to the switch 584 select a contact terminal from the contact terminals 522 to the contact terminal 524 in which the impedance (for example, reactance 572) of the antenna length switching circuit 501 appears. In this way, the impedance of the antenna length switching circuit 501 can be changed to change the electrical length of the antenna resonance element 10.
  • the antenna device 1 may be incorporated into an image pickup device and used. Such an imaging device is also an aspect of the present disclosure.
  • the image pickup apparatus may include any configuration of the antenna apparatus 1 described above.
  • the antenna resonance element 10 may be provided in the housing of the image pickup apparatus, and the antenna feeding circuit board 20 may be provided in the housing.
  • the antenna device 1 can be incorporated into the image pickup device, and therefore, an image pickup device capable of flexibly controlling the frequency characteristic of the antenna resonance element 10 is provided.
  • control method described with reference to FIGS. 18 and 19 is also an aspect of the present disclosure. That is, the control method includes continuously moving the feeding point 13a on the antenna resonance element 10 (step S14, step S15, step S24, and step S25). Even with such a control method, the frequency characteristics of the antenna resonance element 10 can be flexibly controlled as in the antenna device 1.
  • the present technology can also have the following configurations.
  • Antenna resonance element and An antenna feeding circuit board that supplies power to the antenna resonance element, A feeding point moving mechanism that continuously moves the power feeding point to the antenna resonance element on the antenna resonance element.
  • Antenna device To prepare Antenna device.
  • the feeding point moving mechanism moves the feeding point by adjusting the positional relationship between the antenna resonance element and the antenna feeding circuit board.
  • the antenna device according to (1) (3)
  • the feeding point moving mechanism moves the feeding point by moving the antenna feeding circuit board.
  • the antenna device according to any one of (1) to (3).
  • the feeding point moving mechanism moves the antenna feeding circuit board in the direction perpendicular to the plane formed by the antenna resonance element.
  • the contact portion is elastically deformed so that the contact portion with the antenna resonance element moves according to a change in the distance between the antenna resonance element and the antenna feeding circuit board.
  • the antenna device according to (4).
  • the contact portion has a configuration in which the angle of inclination can be changed with respect to the plane formed by the antenna feeding circuit board. The angle of inclination changes according to the change in the distance.
  • the antenna device according to (5).
  • the contact portion includes a first portion fixed to the antenna feeding circuit board, a second portion inclined in the vertical direction from a connection point with the first portion, and a second portion extending in the vertical direction. Equipped with The angle of inclination is the angle of inclination of the second portion with respect to the plane formed by the antenna feeding circuit board.
  • the contact portion includes a base portion connected to the antenna feeding circuit board, and a rotating portion having a structure that is in contact with the antenna resonance element at the feeding point and is rotatable with respect to the base portion.
  • the antenna device according to (4). In the contact portion, the antenna resonance element side rotates from the antenna feeding circuit board side as a starting point so that the contact portion with the antenna resonance element moves.
  • the antenna device according to (4). (10) The contact portion is selected from a plurality of portions that come into contact with the antenna resonant element at different positions. (4) The antenna device according to any one of (9). (11) The antenna feeding circuit board has a metal pattern that is non-contact coupled with a metal portion constituting the antenna resonance element. The position of the non-contact coupling is the feeding point. The antenna device according to any one of (1) to (3). (12) A detection circuit that detects the state of the antenna device and A control unit that controls the feeding point moving mechanism based on the detection result of the detection circuit, and a control unit. Further prepare, The antenna device according to any one of (1) to (11).
  • the detection circuit detects at least one of the reflection coefficient of the antenna resonance element, an object close to the antenna resonance element, the reception level of the antenna resonance element, and the selection of the communication mode using the antenna resonance element.
  • the antenna resonance element is a slot antenna.
  • an antenna length switching circuit for switching the electric length of the antenna resonance element is provided.
  • the antenna length switching circuit is a variable impedance circuit.
  • the antenna length switching circuit is A plurality of contact terminals that come into contact with the antenna resonance element at different positions, A switch that selects a contact terminal from which the impedance of the antenna length switching circuit appears from the plurality of contact terminals.
  • the antenna resonance element is configured by using a part of the housing of the image pickup apparatus.
  • the antenna feeding circuit board is provided in the housing.
  • the imaging device according to (18). (20) This includes continuously moving the power supply points from the antenna feeding circuit board to the antenna resonant element on the antenna resonant element. How to control the antenna device.
  • Antenna device 10 Antenna resonance element 11 Main plate 12 Slot 13 Feeding area 13a Feeding point 20 Antenna feeding circuit board 21 Board 30 Feeding point movement mechanism 31 Deformation mechanism 32 Spring 33 Belt conveyor 34 Linear motor mechanism 40 Contact part 41 Spring 42 Rotating mechanism 43 Spring 50 Antenna length switching circuit 51 Board 52 Contact terminal 60 Detection circuit 61 Feedback circuit 62 Proximity sensor circuit 63 Reception level detection circuit 64 Mode selection circuit 70 Control unit

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Abstract

L'invention concerne un dispositif d'antenne (1) comprenant : un élément résonant d'antenne (10) ; une carte de circuit imprimé d'alimentation électrique d'antenne (20) qui fournit de l'énergie à l'élément résonant d'antenne (10) ; et un mécanisme de déplacement de point d'alimentation électrique (30) qui est destiné à déplacer, d'une manière continue sur l'élément résonant d'antenne (10), un point d'alimentation électrique (13a) pour la puissance fournie à l'élément résonant d'antenne (10).
PCT/JP2021/014990 2020-05-21 2021-04-09 Dispositif d'antenne, dispositif d'imagerie et procédé de commande WO2021235133A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09270630A (ja) * 1996-03-29 1997-10-14 Toyota Motor Corp マイクロ波アンテナの共振周波数調整方法及びマイクロ波アンテナ
JP2005514844A (ja) * 2001-12-27 2005-05-19 エイチアールエル　ラボラトリーズ，エルエルシー ＲＦ−ＭＥＭｓ同調型スロットアンテナ及びその製造方法
JP2005333203A (ja) * 2004-05-18 2005-12-02 Ricoh Co Ltd アンテナ
WO2018116599A1 (fr) * 2016-12-22 2018-06-28 ソニー株式会社 Dispositif électronique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09270630A (ja) * 1996-03-29 1997-10-14 Toyota Motor Corp マイクロ波アンテナの共振周波数調整方法及びマイクロ波アンテナ
JP2005514844A (ja) * 2001-12-27 2005-05-19 エイチアールエル　ラボラトリーズ，エルエルシー ＲＦ−ＭＥＭｓ同調型スロットアンテナ及びその製造方法
JP2005333203A (ja) * 2004-05-18 2005-12-02 Ricoh Co Ltd アンテナ
WO2018116599A1 (fr) * 2016-12-22 2018-06-28 ソニー株式会社 Dispositif électronique

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