JP5940008B2 - USB cable - Google Patents

Description

  The present invention relates to a USB cable used for charging a battery of a portable terminal or communicating with a PC.

  From April 2012, V-High multimedia broadcasting (Mobacas (registered trademark)) for smartphones using ISDB-Tmm (Integrated Services Digital Broadcasting Terrestrial for mobile multimedia) system was started (see Non-Patent Document 1). Mobacas (registered trademark) has two viewing styles: “real-time viewing” in which streaming is viewed in the same way as a normal television, and “store shift time viewing” in which terminal content is downloaded using broadcast waves. is there. Shift time viewing allows broadcast data to be used to store program data in a terminal at midnight or the like, and to play a program stored in the terminal the next morning by a smartphone user (hereinafter referred to as a user).

  In general, during late-night hours, users are likely to be indoors, such as at home. However, not only Mobacas (registered trademark), radio waves are difficult to receive indoors compared to outdoors due to their characteristics. Therefore, even if the rod antenna mounted on the mobile terminal compatible with Mobacas (registered trademark) is extended, sufficient signal strength cannot be obtained, and Mobacas (registered trademark) may not be received.

The pin arrangement of the USB connector will be described with reference to FIG. FIG. 1 is a diagram for explaining a pin arrangement of a USB connector. As shown in FIG. 1, the USB standard A plug has a pin number 1 = V _BUS , 2 = D−, 3 = D +, 4 = GND, and the microUSB Type B plug has a pin number 1 = V _BUS. 2 = D−, 3 = D +, 4 = ID (NC), and 5 = GND. There are many types of mobile terminals called “smartphones” equipped with a microUSB connector. In particular, mobile terminals compatible with Mobacas (registered trademark) use the ID terminal (pin number 4) of the microUSB connector as a connection terminal for an external antenna. There is something to do. An earphone conversion cable with an antenna is disclosed as an accessory for improving the reception status of Mobacas (registered trademark) in such a mobile terminal compatible with Mobacas (registered trademark) (Non-patent Document 2). In addition to the function of converting commercially available earphones to a microUSB connector, the conversion cable itself functions as an external antenna for receiving Mobacas (registered trademark), and the Mobacas (registered) in the portable terminal is connected via the microUSB connector ID terminal. The Mobacas (registered trademark) signal received by the conversion cable is transmitted to the receiving circuit for the trademark.

  As a related technique, Patent Document 1 discloses a data storage system in a mobile phone. The data storage system of Patent Document 1 includes a mobile phone, an external connection terminal, a charger, a power cable with an antenna, and a data broadcasting station. The data broadcast uses at least one broadcast wave selected from BS digital broadcast, terrestrial data broadcast, and FM data broadcast. The power cable can be provided with an antenna wire having a length sufficient to receive the broadcast wave together with the electric wire.

JP 2006-140977 A

"Receiver for terrestrial multimedia broadcasting by segment connection transmission system (preferred use)", [online], March 28, 2011, Radio Industry Association, [March 1, 2013 search], Internet <URL: http://www.arib.or.jp/tyosakenkyu/kikaku_hoso/hoso_std-b053.html> “Docomo NEXT series AQUOS PHONE SH-06D”, index “Japan's first! Enjoy high-quality, high-quality sound and a variety of genres of programs / contents. ”[Online], NTT DoCoMo, Inc., [March 1, 2013 search], Internet <URL: http://www.nttdocomo.co.jp/product/next/sh06d/topics_01. html>

  In the data storage system of Patent Document 1, a broadcast wave such as FM data broadcast is received by providing an electric wire and an antenna wire inside a power cable with an antenna. If the antenna wire is separately accommodated in the cable as in Patent Document 1, not only the material cost and wiring cost of the antenna wire are required, but also the antenna characteristics caused by unintentional coupling between the antenna and the electric wire. It was necessary to take measures to prevent this change, and the cost was further increased. Therefore, an object of the present invention is to provide a USB cable that functions as an antenna in a desired frequency band without separately providing an antenna line.

  The USB cable of the present invention is a USB cable for connecting a load and a power supply, and two parallel resonators are inserted into each of at least two signal lines, and between the two parallel resonators of each signal line. The electrical length is set to 1/4 of the wavelength of the desired reception frequency band or an odd multiple thereof, and the load-side end of the parallel resonator on the power supply side of each signal line is connected via a capacitor, and the load side of each signal line The power supply side end of the parallel resonator was connected via a capacitor.

  The USB cable of the present invention functions as an antenna in a desired frequency band without providing a separate antenna line.

The figure explaining the pin arrangement of a USB connector. 1 is a diagram illustrating an outline of a USB cable according to Embodiment 1. FIG. FIG. 3 is a diagram illustrating a circuit configuration of a USB cable according to the first embodiment. FIG. 5 is a diagram illustrating an outline of a USB cable according to a second embodiment. FIG. 6 is a diagram illustrating an outline of a USB cable according to a third embodiment. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to a third embodiment. FIG. 6 is a diagram illustrating a circuit configuration of a USB cable according to a fourth embodiment. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to a fifth embodiment. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to a sixth embodiment. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to a seventh embodiment. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to an eighth embodiment. 10 is a diagram illustrating a circuit configuration of a USB cable according to Embodiment 9. FIG. FIG. 10 is a diagram illustrating a circuit configuration of a USB cable according to a tenth embodiment.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, the same number is attached | subjected to the structure part which has the same function, and duplication description is abbreviate | omitted.

  The USB cable according to the first embodiment will be described below with reference to FIGS. FIG. 2 is a diagram showing an outline of the USB cable 10 of this embodiment. FIG. 3 is a diagram showing a circuit configuration of the USB cable 10 of this embodiment. As shown in FIG. 2, the USB cable 10 of the present embodiment is a USB-microUSB conversion cable. The USB cable 10 has a configuration in common with a conventional USB-microUSB conversion cable, a terminal-side plug 3 connected to the cable 1 via a terminal-side housing 2 at one end of the cable 1, and the other end of the cable 1. And an AC side plug 8 connected to the cable 1 via the AC side housing 7. The terminal-side plug 3 is the above-described microUSB Type B plug and is connected to the load side, that is, the receptacle of the portable terminal 100 shown in FIG. 2, and the AC-side plug 8 is the above-mentioned USB standard A plug, 2, that is, the AC adapter 200, the PC 300, or the USB mobile power source 400 shown in FIG. 2. In addition to these, the USB cable 10 of this embodiment includes an antenna 4 formed of a conductive wire in the cable 1 and a reception amplifier 5 in the terminal-side housing 2.

  The antenna 4 is designed as a reception frequency band, for example, in a 200 MHz band used by Mobacas (registered trademark). The antenna line has an antenna length that is electrically a quarter wavelength or an odd multiple of the received frequency. By housing the antenna 4 in the same sheath as the other signal lines of the USB cable 10 and integrating them, the user can see only the same as a conventional USB-microUSB conversion cable, and the appearance is not impaired.

As described above, the reception amplifier 5 is built in the terminal-side housing 2 which is a microUSB housing. As shown in FIG. 3, the power supply of the reception amplifier 5 supplies power by branching the signal line from the _VBUS signal line. When the AC adapter 200, the PC 300, or the USB mobile power source 400 is connected to the AC side plug 8, power is supplied to the reception amplifier 5. As defined in the USB standard, + 5V is supplied from _VBUS . When the operating voltage of the receiving amplifier 5 is not 5V, the DC / DC converter 6 is disposed between the _VBUS signal line and the receiving amplifier 5 as shown in FIG. The ground (GND) of the receiving amplifier 5 can be branched from the GND signal line and used. The input terminal of the reception amplifier 5 is connected to the antenna 4 described above. The output terminal of the receiving amplifier 5 is connected to the ID terminal of the terminal side plug 3 (microUSB / Type B).

According to the USB cable 10 of the present embodiment, simultaneously with the charging of the mobile terminal 100, the broadcast wave received by the antenna 4 can be amplified by the reception amplifier 5 and supplied to the mobile terminal 100. Therefore, if the antenna 4 of the present embodiment and the antenna of the mobile terminal 100 originally have approximately the same gain, it is possible to improve the reception sensitivity of the mobile terminal for the broadcast wave for the mobile terminal by the gain of the reception amplifier 5. Alternatively, when the antenna originally provided in the mobile terminal 100 is a rod antenna, the reception sensitivity of the mobile terminal for the broadcast wave for the mobile terminal can be improved without extending the rod antenna. Further, according to the USB cable 10 of the present embodiment, even if any of the AC adapter 200, the PC 300, and the USB mobile power source 400 is not connected to the AC side plug 8 (when not charging), the terminal side plug 3 and the portable terminal If 100 microUSB receptacles are connected, power required for the operation of the reception amplifier 5 can be obtained from the microUSB port ( _VBUS signal line) of the mobile terminal 100, and reception sensitivity can be improved. According to the USB cable 10 of the present embodiment, compared with the earphone conversion cable with an antenna and the prior art shown in Patent Document 1, the reception sensitivity of the indoor broadcast for portable terminals can be improved.

  Next, the USB cable 20 according to the second embodiment will be described with reference to FIG. FIG. 4 is a diagram showing an outline of the USB cable 20 of this embodiment. Similar to the USB cable 10 of the first embodiment, the USB cable 20 of the present embodiment has the same configuration as the conventional USB-microUSB conversion cable, the cable 1, the terminal-side housing 2, the terminal-side plug 3, the AC-side housing 7, An AC side plug 8 is provided. The terminal side plug 3 is a microUSB / TypeB, and the AC side plug 8 is a standard A plug. In addition to these, the USB cable 20 of the present embodiment includes an antenna 4 that protrudes independently from the terminal-side housing 2 so as to branch from the cable 1, and a reception amplifier 5 in the terminal-side housing 2. As shown in FIG. 4, in addition to the features of the USB cable 10 of the first embodiment, the USB cable 20 of the present embodiment is arranged independently without the antenna 4 being integrated with the signal lines, power lines, etc. in the cable 1. It is characterized by that. The circuit configuration of the USB cable 20 of this embodiment is the same as the circuit configuration of the USB cable 10 of the first embodiment shown in FIG.

  According to the USB cable 20 of the present embodiment, the noise superimposed on the cable 1 can be avoided by separating the cable 1 and the antenna 4, and regardless of the position of the AC power source, the notebook PC, or the USB mobile power source. The antenna 4 can be moved so that the broadcast wave for mobile terminals can be received more. As a result, the reception sensitivity of the mobile terminal for broadcast waves for mobile terminals can be further improved.

Next, the USB cable 30 according to the third embodiment will be described with reference to FIGS. FIG. 5 is a diagram showing an outline of the USB cable 30 of this embodiment. FIG. 6 is a diagram showing a circuit configuration of the USB cable 30 of this embodiment. The USB cable 30 of the present embodiment is characterized in that a _VBUS signal line and a GND signal line are used as antennas without providing a separate antenna line unlike the USB cable 10 of the first embodiment. As shown in FIG. _6, the first parallel resonator 32-1 to _{V BUS} signal line and GND signal line, inserting a second parallel resonator 32-2, respectively. The V _BUS signal line is bifurcated at a location electrically separated from the load side end of the first parallel resonator 32-1 by a quarter of the wavelength of the desired reception frequency band or an odd multiple thereof, to the microUSB of _{V BUS} terminal via the inductor 33, the other is connected to the input terminal of the receiving amplifier 5 via a capacitor 34-1, the output terminal of the reception amplifier 5 microUSB of the ID terminal via the capacitor 34-2 Connected to. With respect to the GND signal line, the third parallel resonator 32-2 is electrically connected to the third parallel resonator 32-2 at a location that is electrically separated by a quarter of the wavelength of the desired reception frequency band or an odd multiple of the wavelength. The parallel resonator 32-3 is connected to the power supply side end, and the third parallel resonator 32-3 has a load side end connected to the GND terminal of the microUSB. A signal line branched from the load side end of the inductor 33 of the V _BUS signal line is connected to the power supply terminal of the reception amplifier 5 via the DC / DC converter 6 (only when step-down and step-up are necessary), and the third A signal line branched from the load side end of the parallel resonator 32-3 is connected to the GND terminal of the reception amplifier 5. Furthermore, the load side end of the first parallel resonator 32-1 and the load side end of the second parallel resonator 32-2 are connected in high frequency via the capacitor 31-1 in a desired frequency band. Then, the power supply side end of the third parallel resonator 32-3 and the two branches of the _VBUS signal line are connected in high frequency via the capacitor 31-2 in a desired frequency band. All the resonance frequencies of the parallel resonators are set to be in a desired reception frequency band. The inductance value of the inductor 33 is set to have a sufficiently large impedance in a desired reception frequency band. The capacitance values of the capacitors 31-1 and 31-2 are set so as to have a sufficiently small impedance in a desired frequency band. The inductor 33 can be replaced with a parallel resonator.

  The USB cable 30 of the present embodiment functions as an antenna even if a signal line for a receiving antenna that is separately required in the first and second embodiments is not provided.

Next, the USB cable 40 according to the fourth embodiment will be described in detail with reference to FIG. FIG. 7 is a diagram illustrating a circuit configuration of the USB cable 40 according to the fourth embodiment. In the USB cable 30 of the third embodiment, the V _BUS and GND signal lines are used as antennas. However, in the USB cable 40 of the present embodiment, the + Data signal line and the −Data signal line are antennas in addition to the V _BUS and GND signal lines. It is used as. As shown in FIG. 7, the USB cable 40 of the present embodiment is common with the USB cable 30 of the third embodiment, and capacitors 31-1, 31-2, first, second, and third parallel resonators 32-1. , 32-2 and 32-3, inductor 33, capacitors 34-1 and 34-2, reception amplifier 5, and DC / DC converter 6 only when step-down and step-up are necessary. In addition to this, in the USB cable 40 of the present embodiment, a fourth parallel resonator 42-4 is inserted with respect to the + Data signal line, and the desired electrical connection is made from the load side end of the fourth parallel resonator 42-4. The power supply side end of the fifth parallel resonator 42-5 is connected at a location separated by a quarter of the wavelength of the reception frequency band or an odd multiple of the wavelength. Regarding the -Data signal line, the sixth parallel resonator 42-6 is inserted, and from the load side end of the sixth parallel resonator 42-6, a quarter of the wavelength of the desired reception frequency band or its The power supply side end of the seventh parallel resonator 42-7 is connected at a place separated by an odd multiple.

  Furthermore, the load side end of the second parallel resonator 32-2 and the load side end of the fourth parallel resonator 42-4 are connected in high frequency via the capacitor 41-3 in a desired frequency band. The load side end of the fourth parallel resonator 42-4 and the load side end of the sixth parallel resonator 42-6 are connected in high frequency via the capacitor 41-5 in the desired frequency band. Is done. Further, the power supply side end of the third parallel resonator 32-3 and the power supply side end of the fifth parallel resonator 42-5 are connected in high frequency via the capacitor 41-4 in a desired frequency band. The power supply side end of the fifth parallel resonator 42-5 and the power supply side end of the seventh parallel resonator 42-7 are connected in high frequency via the capacitor 41-6 in the desired frequency band. Is done.

  As described above, the USB cable 40 of this embodiment includes at least two parallel resonators that resonate in a desired frequency band for each signal line, and the interval between the parallel resonators is electrically in the desired reception frequency band. The length is ¼ of the wavelength or an odd multiple of the wavelength, and the load-side end or power source end of the parallel resonator disposed on each signal line is connected in a high-frequency manner via a capacitor.

  According to the USB cable 40 of the present embodiment, all signal lines included in the conventional USB-microUSB conversion cable function as a receiving antenna in a desired frequency band as a whole, and prevent disturbance of the electromagnetic field due to other signal lines. And deterioration of the antenna gain can be suppressed.

  Next, the USB cable 50 according to the fifth embodiment will be described in detail with reference to FIG. FIG. 8 is a diagram illustrating a circuit configuration of the USB cable 50 according to the fifth embodiment. In the USB cable 40 of the fourth embodiment, all signal lines are used as antennas. However, the USB cable 50 of the present embodiment is characterized by using a shield as an antenna in addition to these. As shown in FIG. 8, the USB cable 50 of this embodiment is the same as the USB cable 40 of the fourth embodiment, 31-1, 31-2, 32-1, 32-2, 32-3, 33, 34- 1, 34-2, 41-3, 41-4, 41-5, 41-6, 42-4, 42-5, 42-6, 42-7, receiving amplifier 5, and step-down and step-up are required Only the DC / DC converter 6 is provided. In addition to this, the USB cable 50 of the present embodiment inserts an eighth parallel resonator 52-8 with respect to the shield, and electrically receives a desired reception frequency band from the load side end of the eighth parallel resonator 52-8. Is connected to the power supply side end of the ninth parallel resonator 52-9 at a location separated by a quarter of the wavelength or an odd multiple thereof.

  Furthermore, the load side end of the sixth parallel resonator 42-6 and the load side end of the eighth parallel resonator 52-8 are connected in high frequency via the capacitor 51-7 in a desired frequency band. The power supply side end of the seventh parallel resonator 42-7 and the power supply side end of the ninth parallel resonator 52-9 are connected in high frequency via the capacitor 51-8 in the desired frequency band. Is done.

  As described above, the USB cable 50 according to the present embodiment includes at least two parallel resonators that resonate in a desired frequency band in the shield, and the distance between the parallel resonators is electrically 1 / wavelength of the desired reception frequency band. 4 or an odd multiple thereof, and the load side end or power source end of the parallel resonator disposed in the shield is connected to other signal lines via a capacitor at high frequency.

  According to the USB cable 50 of the present embodiment, all signal lines and shields included in the conventional USB-microUSB conversion cable function as a receiving antenna in a desired frequency band as a whole, and electromagnetic fields generated by other signal lines are reduced. Disturbance can be prevented and deterioration of antenna gain can be suppressed.

Next, the USB cable 60 according to the sixth embodiment will be described in detail with reference to FIG. FIG. 9 is a diagram illustrating a circuit configuration of the USB cable 60 according to the sixth embodiment. The USB cable 60 of the present embodiment is characterized in that the parallel resonator in the USB cable 50 of the fifth embodiment is configured as parallel resonators 62-1 to 62-9 with variable resonance frequency. FIG. 9 is a diagram illustrating a circuit configuration configured as a modification of the fifth embodiment. However, the circuit configuration is not limited to this, and a circuit configuration in which the parallel resonator according to the third and fourth embodiments is replaced with a parallel resonator having a variable resonance frequency may be employed. . As shown in FIG. 9, the load side ends of the power source side parallel resonators 62-1, 62-2, 62-4, 62-6, 62-8 and the load side parallel resonators 62-3, 62- Let L be the electrical length between 5, 62-7 and 62-9. Here, the wavelength of the first received wave is λ ₁ and the wavelength of the second received wave is λ ₂ (where λ ₁ > λ ₂ ). Here, n = 1, 2, 3,..., M = 2, 3, 4,..., L = (2n−1) / 4 × λ ₁ , λ ₁ = (2m−1) × λ ₂ When this is true, L = (2n−1) × (2m−1) / 4 × λ ₂ . Accordingly, in this case, the electrical length L is 1/4 of the wavelength λ ₁ of the first received wave, or an odd multiple thereof, and at the same time an odd number of 1/4 of the wavelength λ ₂ of the second received wave. It is also twice as long. Therefore, in this case, a plurality of received waves satisfying the above-described conditions can be selected and received by tuning the resonance frequency of the parallel resonators 62-1 to 62-9.

  According to the USB cable 60 of this embodiment, since the parallel resonator has a variable resonance frequency, received waves in a plurality of frequency bands that satisfy a predetermined condition can be selected and received.

Next, the USB cable 70 according to the seventh embodiment will be described in detail with reference to FIG. FIG. 10 is a diagram illustrating a circuit configuration of the USB cable 70 according to the seventh embodiment. The USB cable 70 of this embodiment includes at least two parallel resonators that resonate in a desired frequency band f ₁ and _two parallel resonators that resonate in a desired frequency band f ₂ . 1/4 or odd multiple thereof in the wavelength of the frequency band f ₁ the electrical length between the parallel resonator that resonates at the frequency band f ₁ length Satoshi, likewise the electrical length between the parallel resonator that resonates at the frequency band f ₂ 1/4 or length of an odd multiple of the wavelength of the frequency band f _2. Furthermore, each signal line or the load side end of the parallel resonator arranged on the shield or the power supply end is connected to another signal line or shield via a capacitor at a high frequency. Note that the frequency band f ₁ and the frequency band f ₂ are different from each other.

USB cable 70 specifically the present _embodiment, the parallel resonators 72-1 which resonates at the frequency _{f 1} with respect to _{V BUS} signal line, by inserting the parallel resonators 73-1 which resonates at the frequency _{f 2,} the parallel Two branches are made from the load side end of the resonator 72-1 at a distance of 1/4 of the wavelength of the frequency band f ₁ or an odd multiple of the wavelength, and one is connected to the _VBUS terminal of the microUSB via the inductor 33, and the other Is connected to the microUSB ID terminal via the capacitor 34-1, the receiving amplifier 5, and the capacitor 34-2. Parallel resonator resonates at a frequency _{f 1} with respect to GND signal line 72-2, and insert the parallel resonators 73-2 which resonates at the frequency _{f 2,} from the load side end of the parallel resonator 72-2 of the frequency band _{f 1} power source side end of the parallel resonator 72-3 is connected which resonates at frequency f ₁ in 1/4 or length distant places of the odd multiple of the wavelength, frequency band f from the load side end of the parallel resonator 73-2 power source side end of the parallel resonator 73-3, which resonates at the frequency f ₂ at 1/4 or length distant places of the odd multiple of ₂ wavelengths are connected. A signal line branched from the load side end of the inductor 33 of the V _BUS signal line is connected to the power supply terminal of the reception amplifier 5 via the DC / DC converter 6 (only when step-down and step-up are necessary), and a parallel resonator. The signal line branched from the load side end of 73-3 is connected to the GND terminal of the reception amplifier 5. + Data signal parallel resonator resonates at a frequency _{f 1} with respect to line 72-4, and insert the parallel resonators 73-4 which resonates at the frequency _{f 2,} from the load side end of the parallel resonator 72-4 of the frequency band _{f 1} power source side end of the parallel resonator 72-5 is connected which resonates at frequency f ₁ in 1/4 or length distant places of the odd multiple of the wavelength, frequency band f from the load side end of the parallel resonator 73-4 power source side end of the parallel resonator 73-5, which resonates at the frequency f ₂ at 1/4 or length distant places of the odd multiple of ₂ wavelengths are connected. Parallel resonators 72-6 which resonates at the frequency _{f 1} with respect -Data signal lines, and insert the parallel resonators 73-6 which resonates at the frequency _{f 2,} the frequency band _{f 1} from the load side end of the parallel resonator 72-6 1/4 or the power supply side end of the parallel resonator 72-7, which resonates at the frequency f ₁ in the length distant places of the odd multiple of the wavelength is connected in a frequency band from the load side end of the parallel resonator 73-6 power source side end of the parallel resonator 73-7, which resonates at the frequency f ₂ at 1/4 or length distant places of the odd multiple of the wavelength of f ₂ are connected. Parallel resonator resonates at a frequency _{f 1} with respect to the shield 72-8, to insert the parallel resonators 73-8 which resonates at the frequency _{f 2,} from the load side end of the parallel resonator 72-8 of the wavelength of the frequency band _{f 1} 1/4 or the power supply side end of the parallel resonator 72-9, which resonates at the frequency f ₁ in the length distant places of the odd multiple thereof is connected, from the load side end of the parallel resonator 73-8 of the frequency band f ₂ power source side end of the parallel resonator 73-9, which resonates at the frequency f ₂ is connected at 1/4 or length distant places of the odd multiple of the wavelength.

The load-side end of the parallel resonator 72-1 and the load-side end of the parallel resonator 72-2 are connected in high frequency via the capacitor 31-1, and the load-side end of the parallel resonator 73-1 and the parallel resonator are connected. The load side end of 73-2 is connected in high frequency via the capacitor 71-1, and the two branches of the V _BUS signal line are the power source side ends of the parallel resonators 72-3 and 73-3, High frequency connection is made via the capacitor 31-2. The load-side end of the parallel resonator 72-2 and the load-side end of the parallel resonator 72-4 are connected in high frequency via the capacitor 41-3, and the load-side end of the parallel resonator 73-2 and the parallel resonator are connected. The load side end of 73-4 is connected in high frequency via the capacitor 71-2, the power source side ends of the parallel resonators 72-3 and 73-3 and the power source side of the parallel resonators 72-5 and 73-5. The ends are connected in high frequency via the capacitor 41-4. The load-side end of the parallel resonator 72-4 and the load-side end of the parallel resonator 72-6 are connected in high frequency via the capacitor 41-5, and the load-side end of the parallel resonator 73-4 and the parallel resonator are connected. The load side end of 73-7 is connected in high frequency via the capacitor 71-3, and the power source side ends of the parallel resonators 72-5 and 73-5 and the power source side of the parallel resonators 72-7 and 73-7. The ends are connected in high frequency via the capacitor 41-6. The load-side end of the parallel resonator 72-6 and the load-side end of the parallel resonator 72-8 are connected in high frequency via the capacitor 51-7, and the load-side end of the parallel resonator 73-6 and the parallel resonator are connected. The load side end of 73-7 is connected in high frequency via the capacitor 71-4, the power source side end of the parallel resonators 72-7 and 73-7 and the power source side of the parallel resonators 72-9 and 73-9. The ends are connected in high frequency via the capacitor 51-8.

  According to the USB cable 70 of the present embodiment, it is possible to receive received waves of two different frequency bands.

Next, the USB cable 80 according to the eighth embodiment will be described in detail with reference to FIG. FIG. 11 is a diagram illustrating a circuit configuration of the USB cable 80 according to the eighth embodiment. In the USB cable 80 of this embodiment, only the shield formed in the cable is used as an antenna. As shown in FIG. 11, in the USB cable 80 of the present embodiment, a parallel resonator 82-8 is inserted into the shield, and a desired reception frequency band is electrically connected from the load side end of the parallel resonator 82-8. The power supply side end of the parallel resonator 82-9 is connected at a location separated by a quarter wavelength or an odd multiple of the wavelength. Further, a branch point is provided at the power supply side end of the parallel resonator 82-9. The branch point is connected to the input terminal of the receiving amplifier 5 through the capacitor 34-1 and the output terminal of the receiving amplifier 5 is connected to the microUSB ID terminal through the capacitor 34-2. The signal line branched from the V _BUS signal line is connected to the power supply terminal of the reception amplifier 5 via the DC / DC converter 6 (only when step-down and boosting are necessary), and the signal line branched from the GND signal line is received. Connected to the GND terminal of the amplifier 5.

  According to the USB cable 80 of the present embodiment, the shield provided in the conventional USB-microUSB conversion cable can function as a receiving antenna in a desired frequency band.

Next, the USB cable 90 according to the ninth embodiment will be described in detail with reference to FIG. FIG. 12 is a diagram illustrating a circuit configuration of the USB cable 90 according to the ninth embodiment. Similar to the USB cable 80 of the eighth embodiment, the USB cable 90 of the present embodiment uses a shield formed in the cable as an antenna. In addition to this, the USB cable 90 of the present embodiment inserts a parallel resonator 92-1 with respect to the _VBUS signal line, and electrically receives a wavelength in a desired reception frequency band from the load side end of the parallel resonator 92-1. Is connected to the power supply side end of the inductor 93 at a place separated by a length of 1/4 or an odd multiple thereof. For the GND signal line, a parallel resonator 92-2 is inserted, and the length of the wavelength of a desired reception frequency band is electrically 1/4 from the load side end of the parallel resonator 92-2 or an odd multiple thereof. At a remote location, the power supply side end of the parallel resonator 92-3 is connected. The load side end of the parallel resonator 82-8 and the load side end of the parallel resonator 92-1 are connected in high frequency via the capacitor 91-1, and the load side end of the parallel resonator 92-1 and the parallel resonator are connected. The load side end of 92-2 is connected in high frequency via the capacitor 91-3. The power supply side end of the parallel resonator 82-9 and the power supply side end of the inductor 93 are connected in high frequency via the capacitor 91-2, and the power supply side end of the inductor 93 and the power supply side end of the parallel resonator 92-3 are connected to each other. Are connected in high frequency via a capacitor 91-4.

According to the USB cable 90 of the present embodiment, the V _BUS signal line, the GND signal line, and the shield included in the conventional USB-microUSB conversion cable function as a receiving antenna in a desired frequency band as a whole, and other signal lines Can prevent the disturbance of the electromagnetic field, and can suppress the deterioration of the antenna gain.

  Next, the USB cable 1000 according to the tenth embodiment will be described in detail with reference to FIG. FIG. 13 is a diagram illustrating a circuit configuration of the USB cable 1000 according to the tenth embodiment. In the USB cable 1000 of the present embodiment, in addition to the configuration of the USB cable 90 of the ninth embodiment, the parallel resonator 102-1 is inserted with respect to the + Data signal line, and the electric power is supplied from the load side end of the parallel resonator 102-1. Is connected to the power supply side end of the parallel resonator 102-2 at a location that is 1/4 of the wavelength of the desired reception frequency band or an odd multiple of the wavelength, and the parallel resonator 102-3 is connected to the -Data signal line. And the power source of the parallel resonator 102-4 at a location electrically separated from the load side end of the parallel resonator 102-3 by a quarter of the wavelength of the desired reception frequency band or an odd multiple of the wavelength. Side ends are connected. The load-side end of the parallel resonator 92-2 and the load-side end of the parallel resonator 102-1 are connected in high frequency via the capacitor 101-1, and the load-side end of the parallel resonator 102-1 and the parallel resonator are connected. The load side end of 102-3 is connected in high frequency via the capacitor 101-3. The power supply side end of the parallel resonator 92-3 and the power supply side end of the parallel resonator 102-2 are connected in high frequency via the capacitor 101-2, and the power supply side end of the parallel resonator 102-2 and the parallel resonator are connected. The power supply side end of 102-4 is connected in high frequency via the capacitor 101-4.

  According to the USB cable 1000 of the present embodiment, all signal lines and shields included in the conventional USB-microUSB conversion cable function as a receiving antenna in a desired frequency band as a whole, and electromagnetic fields generated by other signal lines are reduced. Disturbance can be prevented and deterioration of antenna gain can be suppressed.

Claims (7)

A USB cable for connecting a load and a power source,
Insert two parallel resonators on each of at least two signal lines,
The electrical length between the two parallel resonators of each signal line is set to 1/4 of the wavelength of the desired reception frequency band or an odd multiple thereof.
The load side end of the parallel resonator on the power source side of each signal line is connected via a capacitor,
A USB cable in which a power supply side end of a parallel resonator on the load side of each signal line is connected via a capacitor. A USB cable for connecting a load and a power source,
Insert two parallel resonators with variable resonance frequency into each of at least two signal lines,
The load side end of the parallel resonator on the power source side of each signal line is connected via a capacitor,
A USB cable in which a power supply side end of a parallel resonator on the load side of each signal line is connected via a capacitor. A USB cable for connecting a load and a power source,
Two parallel resonators that resonate in the first frequency band are inserted in each of at least two signal lines,
Two parallel resonators that resonate in a second frequency band are inserted into each of the signal lines into which the parallel resonator is inserted, and
The electrical length between the parallel resonators resonating in the first frequency band of each signal line is set to ¼ of the wavelength of the first frequency band or an odd multiple thereof.
A USB cable in which the electrical length between parallel resonators resonating in the second frequency band of each signal line is set to 1/4 of the wavelength of the second frequency band or an odd multiple thereof. A USB cable for connecting a load and a power source,
Insert two parallel resonators into the shield,
A USB cable in which the electrical length between the two parallel resonators is ¼ of the wavelength of a desired frequency band or an odd multiple thereof. A USB cable for connecting a load and a power source,
USB cable with two parallel resonators with variable resonance frequency inserted in the shield. A USB cable for connecting a load and a power source,
Insert two parallel resonators that resonate in the first frequency band into the shield,
Insert two parallel resonators that resonate in the second frequency band into the shield,
The electrical length between the parallel resonators resonating in the first frequency band is set to 1/4 of the wavelength of the first frequency band or an odd multiple thereof.
A USB cable in which an electrical length between parallel resonators resonating in the second frequency band is set to ¼ of the wavelength of the second frequency band or an odd multiple thereof. The USB cable according to any one of claims 1 to 6,
The power supply side plug is a USB standard A plug,
The plug on the load side is a microB Type B plug,
A USB cable further comprising a reception amplifier for amplifying a reception wave and supplying the amplified reception wave to a load-side ID terminal.

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