JP2010187107A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of supporting both of horizontally polarized waves and vertically polarized waves with one antenna, wherein the antenna does not cause increase in the number of components or the man-day for production. <P>SOLUTION: The electronic device includes a first slot antenna S1, a second slot antenna S2, and a wireless communication circuit. The first slot antenna S1 is configured by slots prepared in two perpendicular sides at a corner part in a conductive housing or a conductive frame of the electronic device. The second slot antenna S2 configured by slots in two perpendicular sides at a corner part in the conductive housing or the conductive frame of the electronic device, which has sides orthogonal to the two sides and of which the corner part is different from the corner part. The wireless communication circuit is connected to the first slot antenna S1 and the second slot antenna S2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic device including a slot antenna for wireless communication.

  2. Description of the Related Art In recent years, wireless LANs and the like in which electronic devices such as personal computers, copiers, and printers have a wireless communication function and a wireless LAN (local area network) are widely used in offices and homes.

Also, in the field of medical equipment, wireless LAN compatibility is desired for compatibility with electronic medical record systems and for movement of equipment in hospitals.
For example, Patent Document 1 describes a technique in which an antenna element is configured and the antenna element is provided in a notebook personal computer.

  Patent Document 2 also describes a technique in which an antenna element is configured, the antenna element is arranged on an end surface of a lid portion of a notebook personal computer, and an antenna for realizing omnidirectionality is provided.

JP 2004-104333 A JP 2003-318622 A

  The radio wave transmitted / received from the antenna varies depending on whether the antenna is installed, whether it is vertically polarized or horizontally polarized. Therefore, in order to transmit and receive radio waves regardless of polarization, it is preferable that the antenna installed in the electronic device is compatible with both vertical polarization and horizontal polarization.

  However, the inventions described in Patent Document 1 and Patent Document 2 are antennas that support only one of vertical polarization and horizontal polarization because of the structure of the antenna. There is a problem that it is necessary to provide a plurality of antennas in order to cope with both vertically polarized waves and horizontally polarized waves.

  In addition, it is necessary to manufacture the antenna element as a separate part and place it in the housing of the electronic device, which increases the number of parts and the number of manufacturing steps for mounting the part (antenna), which causes problems in manufacturing cost and reliability It has occurred.

  In addition, when realizing omnidirectionality of the antenna, it is generally assumed only in the XY plane (horizontal plane). However, depending on the arrangement of the equipment, the direction of the location where the antenna is installed, etc. If it is omnidirectional, there is a problem that omnidirectionality cannot be realized in the actual usage state of the electronic device.

  A first object of the present invention is to provide an electronic apparatus equipped with an antenna that can handle both horizontal polarization and vertical polarization with one antenna and does not cause an increase in the number of parts or the number of manufacturing steps. That is.

  A second object of the present invention is an antenna that can realize non-directionality while supporting both horizontal polarization and vertical polarization with a minimum number of elements, and does not cause an increase in the number of parts or manufacturing man-hours. It is providing the electronic device provided with.

That is, the above-described problems are solved by the inventions listed below.
(1) The present invention relates to a slot antenna composed of slots provided at two orthogonal sides of a corner portion of a conductive casing or conductive frame of an electronic device, and a wireless communication circuit connected to the slot antenna. , An electronic device characterized by having

  (2) The present invention has a first slot antenna composed of slots provided at two orthogonal sides of a corner of the conductive casing or conductive frame of an electronic device, and a side orthogonal to the two sides. A second slot antenna comprising a conductive casing different from the corner or a slot provided on two orthogonal sides of the corner of the conductive frame; the first slot antenna; and the second slot An electronic device including a wireless communication circuit connected to an antenna.

  (3) In the invention of the above (2), in the use state of the electronic device, the corner portion where the second slot antenna is provided is at least the corner portion where the first slot antenna is provided. It has a side orthogonal to the side.

  (4) In the inventions of (1) to (3) above, the electronic device is a medical device, and the slot antenna is disposed at any corner of the medical device. To do.

  (5) In the above inventions (1) to (3), the electronic device is an office electronic device, and the slot antenna is provided at a corner of a free end of a movable part that can be opened and closed of the office electronic device. Is arranged.

  (1) In this invention, there is provided a slot antenna constituted by slots provided in an L shape on two sides of a horizontal side and a vertical side orthogonal to each other at a corner of a conductive casing or a conductive frame of an electronic device. Therefore, the horizontal side slot can support vertical polarization, and the vertical side slot can support horizontal polarization.

  Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  As a result, it is possible to provide an electronic apparatus equipped with an antenna that can handle both horizontal polarization and vertical polarization with one antenna and does not cause an increase in the number of parts or the number of manufacturing steps.

  (2) In the present invention, a first slot antenna configured with slots provided in two orthogonal sides of a corner of the conductive casing or conductive frame of the electronic device, and two sides of the first slot antenna, A second slot antenna having a side orthogonal to the first slot antenna and comprising a conductive casing different from the corner of the first slot antenna or slots provided on two sides orthogonal to the corner of the conductive frame; Therefore, the slot in the Z-axis direction can deal with omnidirectional horizontal polarization in the XY plane, the slot in the X-axis direction can deal with vertical polarization in the ZY plane, and the slot in the Y-axis direction can deal with vertical deviation in the XZ plane. Can respond to waves.

  Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  As a result, it is possible to realize omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization with the minimum number of elements, and it has an antenna that does not increase the number of parts and manufacturing man-hours. Electronic devices can be provided.

  (3) In the electronic device of the above (2), in the use state of the electronic device, the corner portion where the second slot antenna is provided is at least two sides in the corner portion where the first slot antenna is provided. Since it is configured to have orthogonal sides, it is possible to achieve omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization in a device usage state.

  (4) Note that the electronic devices (1) to (3) above are medical devices, and the medical devices can support both horizontal polarization and vertical polarization to realize stable communication. Is possible.

  (5) The electronic devices (1) to (3) above are office electronic devices, and are horizontal when the office electronic devices are used, that is, when a lid, a display, or the like is in use. Both polarization and vertical polarization can be supported, and stable communication can be realized during use.

It is a perspective view which shows schematic structure of the electronic device which concerns on 1st Embodiment. It is an enlarged view which shows the slot antenna in 1st Embodiment. It is a characteristic view which shows the characteristic of the slot antenna in 1st Embodiment. It is a perspective view which shows schematic structure of the electronic device which concerns on 2nd Embodiment. It is an enlarged view which shows the slot antenna in 2nd Embodiment. It is a characteristic view which shows the characteristic of the slot antenna in 2nd Embodiment. It is a perspective view which shows schematic structure of the electronic device which concerns on 3rd Embodiment. It is a characteristic view which shows the characteristic of the slot antenna in 3rd Embodiment. It is a perspective view which shows schematic structure of the electronic device which concerns on 4th Embodiment.

Hereinafter, embodiments of an electronic device including a slot antenna according to the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.
[First Embodiment]
Hereinafter, an electronic apparatus as a specific embodiment to which the present invention is applied will be described in detail with reference to the drawings. In this embodiment, an office electronic device, that is, a notebook personal computer will be described as an example of the electronic device.

  FIG. 1 is a perspective view of a notebook computer 10 as an electronic apparatus according to the present embodiment as seen from the back side. In this figure, the direction perpendicular to the ground is defined as the Z direction, and the direction horizontal to the ground is defined as the XY direction. Further, the left-right direction when the user of the notebook computer 10 is used is the X direction, and the depth direction when the user of the notebook computer 10 is used is the Y direction.

  The notebook personal computer 10 is configured such that an apparatus main body 11 having an electronic circuit, a keyboard, and the like and a lid 12 having a display are connected by a hinge 13 and can be folded into two via the hinge 13. ing.

  A keyboard 14 for inputting characters and symbols is provided on the upper surface of the apparatus main body 11. In addition, the apparatus main body 11 includes a wireless communication circuit, a CPU (Central Processing Unit) that performs various arithmetic processes of the notebook personal computer 10, and the like.

  Further, a display such as an LCD (Liquid Crystal Display) is provided on the surface of the lid 12 that faces the keyboard 14 when folded, and data processed by the CPU is output and displayed on the display.

  In this embodiment, it is assumed that the lid 12 of the notebook computer 10 is formed of a conductive casing. Alternatively, when the surface of the casing is a non-conductive member such as a resin, a conductive frame is assumed to be present therein.

  Here, the corner of the free end of the lid 12 is assumed to be two sides, a horizontal side and a vertical side that are orthogonal to each other at the corner of the side surface of the conductive casing, and is configured by slots provided on the two sides. An L-shaped slot antenna S1 is formed. FIG. 2 is an enlarged view showing the above slot antenna S1 in an enlarged manner.

  As shown in FIG. 2, the slot antenna S <b> 1 has two sides, a horizontal side and a vertical side that are orthogonal to each other at the corners of the conductive casing, when the notebook personal computer 10 is used (the lid 2 is opened). Is an L-shaped slot antenna composed of slots provided in the antenna, and is configured such that power is supplied from the wireless communication circuit to two points near the middle portion of the slot. In FIG. 2, power is supplied from the inside of the housing, and is not shown.

  When the surface of the casing of the lid 12 of the notebook computer 10 is a non-conductive member such as resin, a slot antenna similar to that shown in FIGS. Assume that S1 is arranged. As described above, by providing the slot in the conductive casing or the conductive frame itself of the device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  In the slot antenna S1 of FIG. 2, the Z direction slot (S1z) arranged on the vertical side functions as a horizontally polarized antenna. And the directivity in the XY plane (horizontal plane) of the horizontal polarization of the slot antenna S1 is substantially non-directional as shown in FIG.

  In the slot antenna S1 of FIG. 2, the X direction slot (S1x) arranged on the horizontal side functions as a vertically polarized antenna. The vertical polarization of the slot antenna S1 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is as shown in FIG. , Directivity in the Y direction, and no sensitivity in the X direction.

  The slot antenna S1 is connected to a wireless communication circuit built in the apparatus main body 11. The wireless communication circuit includes an RF (Radio Frequency) circuit, a ROM (Read Only Memory), and a RAM (Random). Access Memory) and a CPU for controlling them. And slot antenna S1 is used for uses, such as wireless LAN and wireless USB.

  When radio waves are transmitted from the slot antenna S1 to an external device such as a printer, for example, data supplied from the control unit of the apparatus body 11 is converted by the wireless communication circuit and supplied to the slot antenna S1. On the other hand, when the slot antenna S1 receives radio waves from an external device, the radio waves received by the slot antenna S1 are converted by the wireless communication circuit and supplied to the control unit of the apparatus main body 11.

  Next, the communication operation of the notebook personal computer 10 as the electronic apparatus of the present embodiment will be described. When a radio wave of a predetermined frequency is transmitted from an external device, a high-frequency signal is transmitted to the Z direction slot if it is a horizontal polarization according to the polarization (vertical polarization / horizontal polarization) of the radio wave transmitted from the external device. In the case of vertical polarization, a high frequency signal is induced in the X direction slot. The high-frequency signal is processed by the receiving circuit in the wireless communication circuit from the power feeding unit through a coaxial cable or the like, and the demodulated data is processed by the CPU or the like.

  On the other hand, when the slot antenna S1 transmits radio waves, a high-frequency signal is generated by a transmission circuit in the wireless communication circuit under the control of the CPU or the like, and this high-frequency signal is supplied from the power feeding unit to the slot antenna S1 via a coaxial cable or the like. The Then, radio waves are transmitted from the slot antenna S1 to the external device. In this case, vertical polarization is transmitted from the X direction slot, and horizontal polarization is transmitted from the Z direction slot.

  In the notebook type personal computer 10 of this embodiment, a slot constituted by slots provided in an L shape on two sides of a horizontal side and a vertical side orthogonal to each other at the corner of the conductive casing or conductive frame of the device. Since the antenna S1 is provided, the horizontal side slot can support vertical polarization, and the vertical side slot can support horizontal polarization. Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased. As a result, it is possible to provide an electronic apparatus equipped with an antenna that can handle both horizontal polarization and vertical polarization with one antenna and does not cause an increase in the number of parts or the number of manufacturing steps.

  In the above description of the embodiment, the notebook-type personal computer 10 of an office electronic device is taken as a specific example as the electronic device, but is not limited to this. For example, the above embodiments are applied to various devices such as stationary electronic devices, stationary personal computer displays, copiers, and medical devices (medical consoles and medical diagnostic (treatment) devices) as office electronic devices. And good results can be obtained.

[Second Embodiment]
FIG. 4 is a perspective view of a notebook personal computer 20 as an electronic apparatus according to the second embodiment as seen from the front side. In the notebook personal computer 20 of the second embodiment, slot antennas S1 and S2 are provided at two corners of the free end of the lid portion 22 and the main body portion 21, respectively.

  The basic configuration of each of the two slot antennas S1 and S2 is the same as that of the slot antenna S1 of the first embodiment. The description of the configuration except that the two slot antennas S1 and S2 are provided is the same as that in the first embodiment, and will be omitted.

  FIG. 5 is a diagram illustrating the arrangement of the two slot antennas S1 and S2, FIG. 5 (a) is an enlarged view of the arrangement of the slot antenna S1, and FIG. 5 (b) is an illustration of the slot antenna S2. It is the figure which expanded and showed arrangement | positioning.

  Here, in the slot antenna S1 shown in FIGS. 4 and 5A, the Z-direction slot (S1z) arranged on the vertical side functions as a horizontally polarized antenna. The directivity of the horizontally polarized wave in the XY plane (horizontal plane) of the slot antenna S1 is substantially omnidirectional as shown in FIG.

  In addition, in the slot antenna S2 of FIGS. 4 and 5B, the X direction slot (S1x) arranged on the horizontal side functions as a vertically polarized antenna, and the Y direction arranged on the horizontal side. The slot (S1y) functions as a vertically polarized antenna.

  The vertical polarization by the X-direction slot S1x of the slot antenna S1 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  In addition, the vertical polarization by the X-direction slot S2x of the slot antenna S2 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  On the other hand, the vertical polarization by the Y-direction slot S2y of the slot antenna S2 is substantially omnidirectional in the XZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. This is a state in which the directivity shown in FIG. 3B is shifted by 90 degrees, and has directivity in the X direction and no sensitivity in the Y direction.

  Therefore, the combined directivity in the XY plane of vertical polarization by the X direction slot S1x of the slot antenna S1, the X direction slot S2x of the slot antenna S2, and the Y direction slot S2y of the slot antenna S2 is shown in FIG. It is like this. That is, S1x, S2x, and S2y supplement each other with directivity so that the sensitivity does not greatly decrease.

  In other words, the two L-shaped slot antennas S1 and S2 are arranged so as to have slots orthogonal to each other, that is, so as to have a slot in each of the XYZ directions, so as to compensate for each other's directivity null. Extremely large nulls disappear, and uniform directivity is exhibited in almost all directions. In addition, since the two slot antennas S1 and S2 are arranged at the two corners, it is possible to reduce the influence of an obstacle or the like that occurs according to the installation situation and obtain a highly sensitive characteristic.

  Therefore, in the notebook personal computer 20 of the second embodiment, the first slot antenna S1 composed of the slots provided on the two orthogonal sides of the corner of the conductive casing or conductive frame of the electronic device, It has a side perpendicular to the two sides of the first slot antenna and is composed of a conductive casing different from the corner of the first slot antenna or a slot provided on two sides perpendicular to the corner of the conductive frame. Since the second slot antenna S2 is provided, the slot in the Z-axis direction can correspond to omnidirectional horizontal polarization in the XY plane, and the slot in the X-axis direction can correspond to vertical polarization in the ZY plane. In the direction slot, vertical polarization in the XZ plane can be supported.

  Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  As a result, it is possible to realize omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization with the minimum number of elements, and it has an antenna that does not increase the number of parts and manufacturing man-hours. Electronic devices can be provided.

  In addition, in the usage state of the electronic device, the corner portion provided with the second slot antenna is configured to have at least sides that are orthogonal to the two sides of the corner portion provided with the first slot antenna. It is possible to realize omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization in the device usage state.

  In the above description of the second embodiment, the notebook personal computer 20 that is an office electronic device has been described as a specific example of the electronic device. However, the present invention is not limited to this. For example, the above embodiments are applied to various devices such as stationary electronic devices, stationary personal computer displays, copiers, and medical devices (medical consoles and medical diagnostic (treatment) devices) as office electronic devices. And good results can be obtained.

[Third Embodiment]
In the third embodiment, a copying machine 30 of an office electronic device will be described as an example of the electronic device. FIG. 7 is an overall view showing a copying machine 30 as an electronic apparatus according to the present embodiment.

  As shown in FIG. 7, the copying machine 30 has an apparatus main body 31 having an image forming unit therein. An image reading unit 32 and an operation unit 33 are provided on the upper surface of the apparatus body 31, and a document feeder (ADF: Auto Document Feeder) 34 is installed above the apparatus body 31. A paper feeding unit 35 is installed below the apparatus main body 31.

  The image reading unit 32 includes a scanner provided with a CCD (Charge Coupled Device) sensor, an exposure lamp, and the like. The image reading unit 32 optically scans the document conveyed from the document feeding unit 34 and performs photoelectric conversion by the CCD sensor. Read the original image.

  The document image data read by the image reading unit 32 is subjected to various types of image processing, and is output as image data for printing to an image forming unit in the apparatus main body 31. The image forming unit performs electrophotographic image formation, and forms an image on a recording sheet that is a recording medium fed from a paper feeding unit.

The operation unit 33 includes a display unit 36 for displaying various operation screens and setting contents, various keys, a start button for instructing start of printing, and the like.
The document feeding unit 34 automatically conveys the document placed on the document placing table 37 to the image reading unit 32, and conveys the document read by the image reading unit 32 to the discharge unit 38. Further, the document feeding unit 34 is configured to be tiltable with respect to the upper surface (the image reading unit 32) of the apparatus main body 31 with the back side of the apparatus main body 31 as a fulcrum. Three slot antennas S1, S2, and S3 are provided at three corners of the document feeding unit.

Further, the apparatus main body 31 incorporates a wireless communication circuit, and three slot antennas S1, S2, and S3 are connected to the wireless communication circuit.
The basic configuration of each of the three slot antennas S1, S2, and S3 is the same as that of the slot antenna S1 of the first embodiment and the slot antennas S1 and S2 of the second embodiment.

The description of the configuration other than the provision of the three slot antennas S1, S2, and S3 is the same as in the first embodiment and the second embodiment, and is therefore omitted.
Here, in the slot antenna S1 of FIG. 7, the Z-direction slot (S1z) arranged on the vertical side functions as a horizontally polarized antenna. The directivity of the horizontally polarized wave in the XY plane (horizontal plane) of the slot antenna S1 is substantially omnidirectional as shown in FIG.

  Further, in the slot antenna S2 of FIG. 7, the X direction slot (S1x) arranged on the horizontal side functions as a vertically polarized antenna, and the Y direction slot (S1y) arranged on the horizontal side is vertical. It acts as a polarized antenna.

  The vertical polarization by the X-direction slot S1x of the slot antenna S1 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  In addition, the vertical polarization by the X-direction slot S2x of the slot antenna S2 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  On the other hand, the vertical polarization by the Y-direction slot S2y of the slot antenna S2 is substantially omnidirectional in the XZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. This is a state in which the directivity shown in FIG. 3B is shifted by 90 degrees, and has directivity in the X direction and no sensitivity in the Y direction.

  Further, in the slot antenna S3 of FIG. 7, the Z-direction slot (S3z) arranged on the vertical side functions as a horizontally polarized antenna, and in the horizontally polarized XY plane (horizontal plane) of the slot antenna S3. The directivity is substantially non-directional as shown in FIG.

  Further, the Y direction slot (S1y) arranged on the horizontal side functions as a vertically polarized antenna, and the vertically polarized wave by the Y direction slot S1y of the slot antenna S3 is substantially omnidirectional in the YZ plane. However, the directivity on the XY plane (horizontal plane) that is effective when communicating with other devices is in a state shifted by 90 degrees from the directivity shown in FIG. 3B in the first embodiment, and is directed in the X direction. And has no sensitivity in the Y direction.

  Therefore, in the XY plane of vertical polarization by the X direction slot S1x of the slot antenna S1, the X direction slot S2x of the slot antenna S2, the Y direction slot S2y of the slot antenna S2, and the Y direction slot S3y of the slot antenna S3. The combined directivity is as shown in FIG.

  That is, S1x, S2x, S2y, and S3y complement each other in directivity, resulting in less directivity reduction than in the case of the second embodiment, and directivity that does not cause significant sensitivity reduction in almost all directions.

  That is, by arranging the two L-shaped slot antennas S1, S2, and S3 so as to have slots orthogonal to each other, that is, to have slots in each of the XYZ directions, the directivity nulls are compensated for each other. Therefore, extremely large nulls are eliminated, and uniform directivity is exhibited in almost all directions. In addition, since the three slot antennas S1, S2, and S3 are arranged at the three corners, it is possible to reduce the influence of an obstacle or the like that occurs according to the installation situation and obtain a highly sensitive characteristic.

  7 is closed to perform automatic feeding, but the document feeding unit 34 may be opened with its free end pulled up for manual document placement. The slot antennas S1, S2, and S3 are in a state in which the respective slots are arranged in the XYZ directions, and the directivity continues to be in a state in which substantially omnidirectional omnidirectionality is maintained as shown in FIG. .

  Therefore, in the copying machine 30 according to the third embodiment, the first slot is configured by slots provided on two orthogonal sides of the corners of the conductive casing or conductive frame of the electronic device, and has slots orthogonal to each other. Provided on two sides of the antenna S1 that are orthogonal to the two corners of the first slot antenna and that are perpendicular to the corners of the conductive frame or the conductive frame that are different from the corners of the first slot antenna. A second slot antenna S2 composed of a plurality of slots, and a conductive casing having sides that are orthogonal to the two sides of the first and second slot antennas and different from the corners of the first and second slot antennas. And a third slot antenna S3 composed of slots provided on two orthogonal sides of the corners of the body or the conductive frame. Can correspond to a horizontal polarized wave of tropism, the X-axis direction of the slot can accommodate vertically polarized ZY plane, it corresponds to vertical polarization of the XZ plane in the Y-axis direction of the slot.

  Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  As a result, it is possible to realize omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization with the minimum number of elements, and it has an antenna that does not increase the number of parts and manufacturing man-hours. Electronic devices can be provided.

  In addition, in the usage state of the electronic device, the corner portion provided with the second slot antenna is configured to have at least sides that are orthogonal to the two sides of the corner portion provided with the first slot antenna. The corner provided with the third slot antenna is configured to have at least sides that are orthogonal to the two sides of the corner provided with the first and second slot antennas. In addition, it is possible to realize omnidirectionality in each direction while corresponding to both vertical polarization and vertical polarization.

  In the above description of the third embodiment, the copier 30 of the office electronic device is taken as a specific example as the electronic device, but the present invention is not limited to this. For example, as an office electronic device, the above embodiment is applied to various devices such as a notebook computer, a stationary computer, a display of a stationary computer, and a medical device (medical console and medical diagnosis (treatment) device). It can be applied to obtain good results.

[Fourth Embodiment]
In the fourth embodiment, a medical electronic device 40 will be described as an example of an electronic device. FIG. 9 is an overall view showing a medical electronic device 40 as an electronic device according to the present embodiment.

  As shown in FIG. 9, the medical electronic device 40 includes an apparatus main body 41 that includes various processing units. An operation unit 44 and a display unit 42 are installed on the upper surface of the apparatus main body 41.

Here, three slot antennas S1, S2, and S3 are provided at three corners of the display unit.
Further, the apparatus main body 41 includes a wireless communication circuit, and three slot antennas S1, S2, and S3 are connected to the wireless communication circuit.

  The basic configuration of each of the three slot antennas S1, S2, and S3 is the same as that of the slot antennas S1, S2, and S3 of the third embodiment. The description of the configuration other than the provision of the three slot antennas S1, S2, and S3 is the same as that in the first embodiment, the second embodiment, and the second embodiment, and is therefore omitted.

  Here, in the slot antenna S1 of FIG. 9, the Z-direction slot (S1z) arranged on the vertical side functions as a horizontally polarized antenna. The directivity of the horizontally polarized wave in the XY plane (horizontal plane) of the slot antenna S1 is substantially omnidirectional as shown in FIG.

  In the slot antenna S2 of FIG. 9, the X direction slot (S1x) arranged on the horizontal side functions as a vertically polarized antenna, and the Y direction slot (S1y) arranged on the horizontal side is vertical. It acts as a polarized antenna.

  The vertical polarization by the X-direction slot S1x of the slot antenna S1 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  In addition, the vertical polarization by the X-direction slot S2x of the slot antenna S2 is substantially omnidirectional in the YZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. As shown in FIG. 3B in the form, it has directivity in the Y direction and no sensitivity in the X direction.

  On the other hand, the vertical polarization by the Y-direction slot S2y of the slot antenna S2 is substantially omnidirectional in the XZ plane, but the directivity in the XY plane (horizontal plane) effective when communicating with other devices is the first implementation. This is a state in which the directivity shown in FIG. 3B is shifted by 90 degrees, and has directivity in the X direction and no sensitivity in the Y direction.

  Further, in the slot antenna S3 of FIG. 9, the Z direction slot (S3z) arranged on the vertical side functions as a horizontally polarized antenna, and in the horizontally polarized XY plane (horizontal plane) of the slot antenna S3. The directivity is substantially non-directional as shown in FIG.

  Further, the Y direction slot (S1y) arranged on the horizontal side functions as a vertically polarized antenna, and the vertically polarized wave by the Y direction slot S1y of the slot antenna S3 is substantially omnidirectional in the YZ plane. However, the directivity on the XY plane (horizontal plane) that is effective when communicating with other devices is in a state shifted by 90 degrees from the directivity shown in FIG. 3B in the first embodiment, and is directed in the X direction. And has no sensitivity in the Y direction.

  Therefore, in the XY plane of vertical polarization by the X direction slot S1x of the slot antenna S1, the X direction slot S2x of the slot antenna S2, the Y direction slot S2y of the slot antenna S2, and the Y direction slot S3y of the slot antenna S3. The combined directivity is as shown in FIG.

  That is, S1x, S2x, S2y, and S3y compensate for each other, and the sensitivity is reduced less than in the second embodiment. As in the third embodiment, the sensitivity is greatly reduced in almost all directions. There is no directivity.

  That is, by arranging the two L-shaped slot antennas S1, S2, and S3 so as to have slots orthogonal to each other, that is, to have slots in each of the XYZ directions, the directivity nulls are compensated for each other. Therefore, extremely large nulls are eliminated, and uniform directivity is exhibited in almost all directions. In addition, since the three slot antennas S1, S2, and S3 are arranged at the three corners, it is possible to reduce the influence of an obstacle or the like that occurs according to the installation situation and obtain a highly sensitive characteristic.

  In addition, although the display unit 42 shown in FIG. 9 is in a fixed state, the slot antennas S 1, S 2, and S 3 described above also have their slots in each direction of XYZ even when the liquid crystal display can be changed in direction. In this state, the directivity continues to be a state in which substantially omnidirectional omnidirectionality is maintained as shown in FIG.

  Therefore, in the medical electronic device 40 according to the fourth embodiment, the electronic device 40 includes slots provided on two orthogonal sides of the corners of the conductive casing or conductive frame of the electronic device, and has slots orthogonal to each other. One slot antenna S1 and two sides that are perpendicular to the two sides of the first slot antenna and are different from the corners of the first slot antenna, or two sides that are perpendicular to the corners of the conductive frame A second slot antenna S2 composed of slots provided in the first and second slot antennas and a side perpendicular to the two sides of the first and second slot antennas, and different conductivity from the corners of the first and second slot antennas. And a third slot antenna S3 composed of slots provided on two orthogonal sides of the corner of the conductive frame, so that in the Z-axis direction slot XY Can correspond to a horizontal polarized wave non-directional surface, the X-axis direction of the slot can accommodate vertically polarized ZY plane, it corresponds to vertical polarization of the XZ plane in the Y-axis direction of the slot.

  Further, by providing a slot in the conductive casing or the conductive frame itself of the electronic device, the casing itself becomes an antenna, so that the number of parts and the number of mounting steps are not increased.

  As a result, it is possible to realize omnidirectionality in each direction while supporting both horizontal polarization and vertical polarization with the minimum number of elements, and it has an antenna that does not increase the number of parts and manufacturing man-hours. Electronic devices can be provided.

  Further, in the usage state of the electronic device, the corner portion where the second slot antenna is provided is configured to have at least sides orthogonal to the two sides of the corner portion where the first slot antenna is provided. The corner where the third slot antenna is provided is configured to have at least two sides orthogonal to the two sides of the corner where the first and second slot antennas are provided. In addition, it is possible to realize omnidirectionality in each direction while corresponding to both vertical polarization and vertical polarization.

  In the above description of the fourth embodiment, the medical electronic device 40 such as a medical console is taken as a specific example as the electronic device, but the present invention is not limited to this. For example, the above embodiment can be applied to various devices such as other medical devices (medical diagnosis (treatment) devices) and computer servers, and good results can be obtained.

[Other Embodiments (1)]
It should be noted that the number of slot antennas formed in the conductive casing of the electronic device and the installation locations thereof are set as necessary.

[Other embodiment (2)]
In addition, regarding the same axial elements, such as S1z and S3z and S1x and S2x, of the slot antenna formed in the conductive casing of the electronic device, different parts such as a corner, a main body portion, and a display portion that are separated from each other By arranging the slot antennas S1 to S3 so as to be arranged at the corners, etc., good results can be obtained by compensating for sensitivity and directivity by the space diversity effect.

[Other embodiment (3)]
In addition, even if the slots are in the same vertical z direction, such as S1z and S3z, by arranging the slot antennas S1 to S3 so as to be divided to the left and right of the electronic device, a free space that is not hidden (not blocked) by the main body of the electronic device. Can be opened in different directions, the spatial diversity effect compensates for sensitivity and directivity, and good results can be obtained.

S1 to S3 Slot antenna 10 Notebook PC 11 Device main body 12 Lid 13 Hinge 14 Keyboard 20 Notebook PC 30 Copying machine 40 Medical electronic device

Claims (5)

A slot antenna composed of slots provided on two sides of a horizontal side and a vertical side perpendicular to each other at the corner of the conductive casing of the electronic device;
A slot antenna composed of slots provided on two sides perpendicular to the corner of the conductive casing or conductive frame of the electronic device;
A wireless communication circuit connected to the slot antenna;
An electronic device comprising: Electronics. In the usage state of the electronic device,
The corner portion provided with the second slot antenna has at least a side orthogonal to the two sides in the corner portion provided with the first slot antenna.
The electronic device according to claim 2. The electronic device is a medical device,
The slot antenna is arranged at any corner of the medical device,
The electronic device according to any one of claims 1 to 3, wherein The electronic device is an office electronic device,
The slot antenna is arranged at the corner of the free end of the movable part that can be opened and closed of the office electronic device,
The electronic device according to any one of claims 1 to 3, wherein

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