JP5144419B2 - Portable radio - Google Patents

Description

  The present invention relates to a portable wireless device having an antenna.

  Conventionally, a portable radio device is generally provided with a main antenna connected to a mobile communication network provided outside the case of the portable radio device. Many have built-in main antennas (see, for example, Patent Document 1).

In addition, there are many portable wireless devices in which a plurality of antennas for communicating with external devices in a frequency band other than the main antenna are provided inside the housing (for example, see Patent Document 2). Here, examples of the frequency band for performing communication with an external device using a frequency band other than the main antenna include frequency bands such as RFID, GPS, and Bluetooth.
JP 2004-227046 A JP 2007-306287 A

  However, in the configuration as shown in Patent Document 2, in order to communicate with an external device using a plurality of different frequency bands described above, it is necessary to separately provide a plurality of antennas corresponding to the number of frequency bands. For this reason, the problem that the number of parts mounted in a portable radio device will arise.

  Therefore, the present invention has been made in view of the above-described problems, and provides a portable wireless device that can receive signals related to a plurality of frequency bands while suppressing an increase in the number of components.

In order to solve the above-described problem, a portable wireless device according to the present invention has a coil having an outer peripheral portion and an inner peripheral portion formed by being wound a plurality of times, and is resonated in a first frequency band; A first signal processing unit for processing a signal in the first frequency band received by the antenna, and a signal in a second frequency band different from the first frequency band can be attenuated; A first band-inhibiting element provided across the outer peripheral portion and the inner peripheral portion of the coil of the antenna so as to form a resonant portion that resonates with a signal of the second frequency band in a part of the antenna ; And a second signal processing unit for processing a signal in the second frequency band resonated by the resonating unit.

  In the portable wireless device, it is preferable that a second signal attenuation unit that attenuates a signal in a frequency band other than the second frequency band is provided between the resonance unit and the second signal processing unit.

  In the portable wireless device, it is preferable that the second signal attenuating unit is configured to attenuate the signal in the first frequency band.

  In the portable wireless device, the first signal attenuating unit may be configured such that the resonance unit has a length corresponding to a half wavelength or a quarter wavelength of a wavelength corresponding to the second frequency band. The antenna is preferably connected to the antenna.

  In the portable wireless device, the second frequency band is included in at least a part of a high-order secondary resonance frequency band of the first frequency band, and the resonance unit includes a high-order secondary resonance frequency band. It is preferable that an adjusting means for adjusting the resonance point is connected.

  ADVANTAGE OF THE INVENTION According to this invention, the portable radio which can receive the signal which concerns on a some frequency band can be provided, suppressing the increase in a number of parts.

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

  FIG. 1 is an external perspective view of a cellular phone 1 which is an example of a portable wireless device according to the present invention. 1 shows a form of a so-called foldable mobile phone device, the form of the mobile phone device according to the present invention is not particularly limited to this.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation button group 11 and a voice input unit 12 to which a voice uttered by a user of the mobile phone 1 is input on the surface unit 10. The operation button group 11 includes a function setting operation button 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input operation button 14 for inputting a telephone number and characters such as mail. And a determination operation button 15 for performing determination and scrolling in various operations.

  Further, the display unit side body 3 includes a display 21 for displaying various information on the surface unit 20 and a sound output unit 22 for outputting the voice of the other party of the call.

  Further, the operation button group 11, the voice input unit 12, the display 21, and the voice output unit 22 described above constitute a processing unit 62 described later.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be opened (opened) with each other, or the operation unit side body 2 and the display unit side body 3 can be folded (folded state).

  FIG. 2 is a functional block diagram showing functions of the mobile phone 1. As shown in FIG. 2, the mobile phone 1 processes a first communication unit 60, a second communication unit 61 that communicates with an external terminal, and information communicated by the second communication unit 61. Part 62.

  The first communication unit 60 includes a magnetic field antenna 50 that communicates with an external device in a first use frequency band (for example, 13.56 MHz), a first communication processing unit (first signal processing unit) 51, And an adjustment capacitor 52. Details of the first communication unit 60 will be described later.

  The magnetic field antenna 50 includes, for example, a coil wound in a plurality of times on a sheet made of PET (polyethylene terephthalate) material, and receives a signal in a first use frequency band transmitted from an external device.

  In addition, the first communication unit 60 does not have a power supply unit, so-called passive induction electromagnetic method (electromagnetic induction method), passive mutual induction method (electromagnetic coupling method), or radiated electromagnetic field. A system (radio wave system), an active type having a power supply unit, or the like can be used. Further, as an access method of the first communication unit 60, a read / write type, a read only type, a write once type, or the like can be used.

  Further, as shown in FIG. 2, the second communication unit 61 includes a main antenna 70 that communicates with an external device in a second use frequency band that is higher than the first use frequency band, and a modulation process. Alternatively, a second communication processing unit (second signal processing unit) 71 that performs signal processing such as demodulation processing is provided. Further, the first communication unit 60 and the second communication unit 61 are supplied with power from the rechargeable battery 43.

  The main antenna 70 communicates with an external device in the second use frequency band (for example, 800 MHz). In the present embodiment, the second use frequency band is 800 MHz, but other frequency bands may be used.

  The second communication processing unit 71 demodulates the signal received by the main antenna 70, supplies the processed signal to the processing unit 62, or modulates the signal supplied from the processing unit 62, and performs processing on the main antenna 70. To the external device.

  Further, as shown in FIG. 2, the processing unit 62 stores operation buttons 11, a voice input unit 12, a display 21, a voice output unit 22, a CPU 72 that performs a predetermined calculation process, and predetermined data. A memory 73, an acoustic processing unit 74 that performs predetermined sound processing, an image processing unit 75 that performs predetermined image processing, a camera module 76 that captures a subject, and a speaker 77 that outputs a ringtone and the like It is equipped with. Further, the processing unit 62 is supplied with power from the rechargeable battery 43. In the mobile phone 1, as shown in FIG. 2, the first communication processing unit 51 and the CPU 72 are connected by a signal line S and processed by the first communication unit 60 via the signal line S. The information is supplied to the image processing unit 75, and the information processed by the image processing unit 75 is displayed on the display 21.

  Here, in the following first to third embodiments, the configuration of the first communication unit 60 will be described in more detail.

<First Embodiment>
A first embodiment of the present invention will be described below. FIG. 3 is a diagram illustrating the configuration of the first communication unit 60 in the first embodiment. As shown in FIG. 3, the first communication unit 60 includes a magnetic field antenna (antenna) 50, band-inhibiting elements (first signal attenuating units) 81 and 82, and a first communication processing unit (first signal). A processing unit 51, a second communication processing unit (second signal processing unit) 71, and a filter (second signal attenuating unit) 55.

  In the present embodiment, the main antenna 70 described above is configured by a part of the magnetic field antenna 50. In such a configuration, it is not necessary to provide the main antenna 70 separately.

The magnetic field antenna 50 is resonated in a first frequency band (for example, 13.56 MHz).
The first communication processing unit 51 processes a signal in the first frequency band resonated by the magnetic field antenna 50. Specifically, signal processing such as demodulation is performed on the signal in the first frequency band supplied via the magnetic field antenna 50.

  The band-inhibiting elements 81 and 82 are configured to be capable of attenuating signals in a second frequency band (for example, 800 MHz) different from the first frequency band, and in the part of the magnetic field antenna 50, the second frequency band. The magnetic field antenna 50 is connected so as to form a resonating part 50a that is resonated by the above signal. That is, signals in the second frequency band different from the first frequency band are attenuated by the band blocking elements 81 and 82. The resonance part 50a formed by the band-inhibiting elements 81 and 82 is resonated with a signal in the second frequency band. The band-inhibiting elements 81 and 82 are constituted by, for example, notch filters or ferrite beads. In this embodiment, ferrite beads are used as the band-inhibiting elements 81 and 82.

  Here, the resonance unit 50a is an element (a region surrounded by a broken line in FIG. 3) formed between the band inhibition element 81 and the band inhibition element 82 in the magnetic field antenna 50.

  The second communication processing unit 71 processes a signal in the second frequency band resonated by the resonance unit 50a.

  The mobile phone 1 according to the first embodiment is configured to attenuate a signal in a second frequency band different from the first frequency band, and in the part of the magnetic field antenna 50, the signal in the second frequency band. The band-inhibiting elements 81 and 82 connected to the magnetic field antenna 50 are provided so as to form a resonance part 50a that resonates with the magnetic field antenna 50.

  For this reason, the mobile phone 1 resonates with signals in a plurality of frequency bands by the magnetic field antenna 50 even when there are a plurality of frequency bands (first frequency band, second frequency band) to be resonated. Can do. Therefore, the number of parts of the mobile phone 1 can be reduced, and an increase in the size of the housing of the mobile phone 1 can be suppressed.

  The filter 55 is provided between the resonance unit 50a and the second communication processing unit 71, is connected to the resonance unit 50a and the second communication processing unit 71, and attenuates a signal in the first frequency band. .

  Thereby, since the signal of the first frequency band resonated by the magnetic field antenna 50 is attenuated by the filter 55, the signal of the first frequency band is attenuated by the second communication processing unit 71 in the second frequency band. Wireless communication can be suitably performed.

  The filter 55 is not limited to the first frequency band, and may be configured to attenuate signals in frequency bands other than the second frequency band. For example, as the filter 55, a bandpass filter that attenuates a signal in a frequency band other than the second frequency band can be used.

  For this reason, the 2nd communication processing part 71 can perform the radio | wireless communication in a 2nd frequency band more suitably.

  Further, the band-inhibiting elements 81 and 82 are connected to the magnetic field antenna 50 so that the resonating unit 50a has a length corresponding to a half wavelength or a quarter wavelength of the wavelength corresponding to the second frequency band. You may comprise as follows.

  For this reason, the cellular phone 1 can resonate with signals in a plurality of frequency bands without unnecessarily increasing the length of the element of the magnetic field antenna 50. Therefore, the enlargement of the housing of the mobile phone 1 can be suppressed.

  Further, when the second frequency band is included in at least a part of the high-order secondary resonance frequency band of the first frequency band, the resonance unit 50a attenuates the high-order secondary resonance point. A filter 55 may be connected.

  Further, the high-order secondary resonance point may be adjusted by connecting reactance adjusting means (not shown) to the magnetic field antenna 50. Here, as the reactance adjusting means, a dielectric material, a magnetic material, a detuning capacitor, a configuration capable of adjusting the number of turns of the magnetic field antenna, and the like can be considered. This is based on the fact that the L value of the magnetic field antenna 50 is dominant with respect to the high-order secondary resonance point, and the position of the high-order resonance point can be adjusted by changing this L value. is there.

  Accordingly, the second communication processing unit 71 includes a part of the high-order secondary resonance point (for example, 13.56 MHz × n) in the first frequency band in the second frequency band (for example, 800 MHz). Even in such a case, the filter 55 can reduce high-order secondary resonance points in the first frequency band. Therefore, it is possible to suitably suppress the deterioration of the gain of the resonance unit 50a due to the high-order secondary resonance point in the first frequency band overlapping the second frequency band.

Second Embodiment
A second embodiment of the present invention will be described below. The second embodiment will be described with a focus on differences from the first embodiment, the same reference numerals are given to the same configurations as the first embodiment, and the description will be omitted or simplified.

  FIG. 4 is a diagram illustrating the configuration of the first communication unit 60 of the mobile phone 1 according to the second embodiment. As shown in FIG. 4, the first communication unit 60 includes a magnetic field antenna 50, band-inhibiting elements 83, 84, 85, 86, a first communication processing unit 51, a second communication processing unit 71, A filter 55, a GPS circuit unit 56, a filter 57, a Bluetooth (registered trademark) circuit unit 58, and a filter 59 are provided.

  The mobile phone 1 according to the second embodiment is different from the first embodiment in that it includes band-inhibiting elements 83, 84, 85, 86, a GPS circuit unit 56, a filter 57, a Bluetooth circuit unit 58, and a filter 59. Different.

  The band-inhibiting elements 83 and 84 attenuate a signal in a second frequency band (for example, 800 MHz) different from the first frequency band, and are resonated with the signal in the second frequency band in a part of the magnetic field antenna 50. The magnetic field antenna 50 is connected so as to form a resonance part 50b. That is, the signal in the second frequency band different from the first frequency band is attenuated by the band blocking elements 83 and 84. In addition, the resonance part 50b formed between the band-inhibiting elements 83 and 84 is resonated with the signal in the second frequency band.

  The band-inhibiting elements 83 and 85 attenuate a signal in a third frequency band (for example, 1.5 GHz) different from the first frequency band, and in part of the magnetic field antenna 50, convert the signal to the third frequency band. The magnetic field antenna 50 is connected so as to form a resonating part 50c to be resonated. That is, the signal in the third frequency band different from the first frequency band is attenuated by the band blocking elements 83 and 85. In addition, the resonance part 50c formed between the band-inhibiting elements 83 and 85 is resonated with the signal in the third frequency band.

  The band-inhibiting elements 83 and 86 attenuate a signal in a fourth frequency band (for example, 2.4 GHz) different from the first frequency band, and a part of the magnetic field antenna 50 converts the signal into the fourth frequency band. The magnetic field antenna 50 is connected so as to form a resonating part 50d to be resonated. That is, the signal in the fourth frequency band different from the first frequency band is attenuated by the band blocking elements 83 and 86. Further, the resonance part 50d formed between the band-inhibiting elements 83 and 86 is resonated by a signal in the fourth frequency band.

  In the present embodiment, ferrite beads provided across the respective lines constituting the magnetic field antenna 50 are used as the band inhibition element 83. In addition, among the lines constituting the magnetic field antenna 50, ferrite beads provided for each line are used as the band-inhibiting elements 84, 85, 86.

  The resonating unit 50 b is an element that includes the band inhibition element 83 and the band inhibition element 84 in the magnetic field antenna 50. In addition, the resonance unit 50 c is an element that includes the band inhibition element 83 and the band inhibition element 85 in the magnetic field antenna 50. In addition, the resonance unit 50 d is an element that includes the band inhibition element 83 and the band inhibition element 86 in the magnetic field antenna 50.

  The second communication processing unit (second signal processing unit) 71 is connected to the resonance unit 50b and processes a signal in the second frequency band that is resonated by the resonance unit 50b.

  The GPS circuit unit (second signal processing unit) 56 detects the current position in real time using a system (GPS: Global Positioning System) that measures the current position on the earth. The frequency band used in GPS communication is the third frequency band (1.5 GHz).

  The GPS circuit unit 56 is connected to the resonance unit 50c and processes a signal in the third frequency band that is resonated by the resonance unit 50c.

  The Bluetooth circuit unit (second signal processing unit) 58 performs wireless communication with an external device compliant with the Bluetooth standard. The frequency band used for Bluetooth communication is the fourth frequency band (2.4 GHz).

  The Bluetooth circuit unit 58 is connected to the resonance unit 50d and processes a signal in the fourth frequency band that is resonated by the resonance unit 50d.

  The filter 55 is provided between the resonance unit 50b and the second communication processing unit 71, is connected to the resonance unit 50b and the second communication processing unit 71, and has first, third, and fourth frequencies. Attenuate the band signal. The filter 55 may be configured to attenuate signals in frequency bands other than the second frequency band. For example, as the filter 55, a bandpass filter that attenuates a signal in a frequency band other than the second frequency band can be used.

  The filter 57 is provided between the resonance unit 50c and the GPS circuit unit 56, and is connected to the resonance unit 50c and the GPS circuit unit 56, and attenuates signals in the first, second, and fourth frequency bands. . The filter 57 may be configured to attenuate a signal in a frequency band other than the third frequency band. For example, as the filter 57, a band pass filter that attenuates a signal in a frequency band other than the third frequency band can be used.

  The filter 59 is provided between the resonance unit 50d and the Bluetooth circuit unit 58, is connected to the resonance unit 50d and the Bluetooth circuit, and attenuates signals in the first, second, and third frequency bands. The filter 59 may be configured to attenuate a signal in a frequency band other than the fourth frequency band. For example, as the filter 59, a band pass filter that attenuates a signal in a frequency band other than the fourth frequency band can be used.

  The band-inhibiting elements 83 and 84 are connected to the magnetic field antenna 50 so that the resonance part 50b has a length corresponding to a half wavelength or a quarter wavelength of the wavelength corresponding to the second frequency band. It may be configured.

  Further, the band-inhibiting elements 83 and 85 are connected to the magnetic field antenna 50 so that the resonance part 50c has a length corresponding to a half wavelength or a quarter wavelength of the wavelength corresponding to the third frequency band. You may comprise as follows.

  Further, the band-inhibiting elements 83 and 86 are connected to the magnetic field antenna 50 so that the resonance part 50d has a length corresponding to a half wavelength or a quarter wavelength of the wavelength corresponding to the fourth frequency band. You may comprise as follows.

  When the second frequency band is included in at least a part of the higher-order sub-resonance frequency bands of the first, third, and fourth frequency bands, the resonance unit 50b includes the higher-order sub-resonance bands. A filter 55 as means for attenuating the resonance point may be connected.

  Further, the high-order secondary resonance point may be adjusted by connecting reactance adjusting means (not shown) to the magnetic field antenna 50. Here, as the reactance adjusting means, a dielectric material, a magnetic material, a detuning capacitor, a configuration capable of adjusting the number of turns of the magnetic field antenna, and the like can be considered. This is based on the fact that the L value of the magnetic field antenna 50 is dominant with respect to the high-order secondary resonance point, and the position of the high-order resonance point can be adjusted by changing this L value. is there.

  In addition, when the third frequency band is included in at least a part of the higher-order secondary resonance frequency bands of the first, second, and fourth frequency bands, the resonance unit 50c includes the higher-order secondary resonance frequency bands. A filter 57 as a means for attenuating the secondary resonance point may be connected.

  Further, the high-order secondary resonance point may be adjusted by connecting reactance adjusting means (not shown) to the magnetic field antenna 50. Here, as the reactance adjusting means, a dielectric material, a magnetic material, a detuning capacitor, a configuration capable of adjusting the number of turns of the magnetic field antenna, and the like can be considered. This is based on the fact that the L value of the magnetic field antenna 50 is dominant with respect to the high-order secondary resonance point, and the position of the high-order resonance point can be adjusted by changing this L value. is there.

  In addition, when the fourth frequency band is included in at least a part of the higher-order secondary resonance frequency bands of the first, second, and third frequency bands, the resonance unit 50d includes the higher-order secondary resonance frequency bands. A filter 59 as a means for attenuating the secondary resonance point may be connected.

  Further, the high-order secondary resonance point may be adjusted by connecting reactance adjusting means (not shown) to the magnetic field antenna 50. Here, as the reactance adjusting means, a dielectric material, a magnetic material, a detuning capacitor, a configuration capable of adjusting the number of turns of the magnetic field antenna, and the like can be considered. This is based on the fact that the L value of the magnetic field antenna 50 is dominant with respect to the high-order secondary resonance point, and the position of the high-order resonance point can be adjusted by changing this L value. is there.

  According to the mobile phone 1 of the second embodiment, the same effects as those of the first embodiment can be obtained, and not only the first and second frequency bands but also the third and fourth frequency bands. Also, the magnetic field antenna 50 can resonate.

<Third Embodiment>
A third embodiment of the present invention will be described below. About 3rd Embodiment, it demonstrates centering on a different point from 2nd Embodiment, the same code | symbol is attached | subjected about the structure similar to 2nd Embodiment, and description is abbreviate | omitted or simplified.

  In the third embodiment, instead of the band inhibition element 83 provided over each line constituting the magnetic field antenna 50, the band inhibition elements 87, 88 and 89 provided for each line among the lines constituting the magnetic field antenna 50 are provided. The point provided is different from the second embodiment.

  The mobile phone 1 according to the third embodiment includes band-inhibiting elements 87, 88, and 89 provided for each line among the lines constituting the magnetic field antenna 50. Therefore, the second communication processing unit 71 and the filter 55, the GPS circuit unit 56 and the filter 57, the Bluetooth circuit unit 58, and the filter 59 can be arranged for each position corresponding to the resonance units 50b, 50c, and 50d. .

  As described above, according to the mobile phone 1 of the third embodiment, the same effects as those of the second embodiment can be obtained, and the limited space inside the housing of the mobile phone 1 can be effectively utilized. It is possible to suppress an increase in the size of the casing of the mobile phone 1.

  In the above-described embodiment, the magnetic field antenna 50 that communicates with the external device using the first frequency band is used to resonate with a plurality of frequency bands, but is not limited thereto. For example, resonance with a plurality of frequency bands may be performed using a diversity loop antenna.

  The frequency band resonated by the magnetic field antenna 50 is not limited to the second to fourth frequency bands described above, and may be resonated using other frequency bands.

  In the above-described embodiment, the mobile phone 1 has been described. However, the present invention is not limited to this, and for example, PHS (registered trademark: Personal Handyphone System), PDA (Personal Digital Assistant), portable The navigation device may be a portable personal computer such as a notebook computer.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

1 is an external perspective view of a mobile phone 1 that is an example of a portable wireless device according to the present invention. 3 is a functional block diagram showing functions of the mobile phone 1. FIG. It is a figure shown about the structure of the 1st communication part 60 in 1st Embodiment. It is a figure shown about the structure of the 1st communication part 60 in 2nd Embodiment. It is a figure shown about the structure of the 1st communication part 60 in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 50 Magnetic field antenna 50a Resonance part 51 1st communication processing part 55 Filter 71 2nd communication processing part 81, 82 Band inhibition element

Claims (5)

An antenna having an outer peripheral portion and an inner peripheral portion formed by being wound a plurality of times and resonating in a first frequency band;
A first signal processing unit for processing a signal of the first frequency band received by the antenna;
The second frequency band signal different from the first frequency band is configured to be attenuated, and a resonance part that resonates with the signal of the second frequency band is formed in a part of the antenna. A first signal attenuating unit including a band-inhibiting element provided over the outer peripheral part and the inner peripheral part of the coil in the antenna;
And a second signal processing unit that processes a signal in the second frequency band resonated by the resonance unit.   2. The portable device according to claim 1, further comprising a second signal attenuating unit for attenuating a signal in a frequency band other than the second frequency band between the resonance unit and the second signal processing unit. transceiver.   The portable wireless device according to claim 2, wherein the second signal attenuating unit is configured to attenuate the signal of the first frequency band.   The first signal attenuating unit is connected to the antenna such that the resonance unit has a length corresponding to a half wavelength or a quarter wavelength of a wavelength corresponding to the second frequency band. The portable wireless device according to claim 1. The second frequency band is included in at least a part of a higher-order secondary resonance frequency band of the first frequency band,
The portable wireless device according to any one of claims 1 to 4, wherein an adjustment unit that adjusts a high-order secondary resonance point is connected to the resonance unit.

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