JP4704324B2 - Earphone antenna device and wireless communication terminal connected to the device - Google Patents

Description

  The present invention relates to a dipole antenna device, an earphone antenna device, and a wireless communication terminal connected to the device, which can be used by connecting to a terminal device having a wireless communication function, and in particular, a pair of antenna devices includes an antenna coaxial cable. The present invention relates to a dipole antenna device, an earphone antenna device, and a wireless communication terminal connected to the device.

  Conventionally, an earphone antenna integrally formed so as to have an earphone or headphone function and an antenna function is used in a portable radio terminal, a portable TV receiver, and a radio communication terminal device equipped with a radio and a TV function. ing.

  For example, Patent Document 1 discloses a configuration as shown in FIG. 15 as the earphone antenna. In the earphone antenna described above, the central conductor (inner conductor) 924 of the coaxial cable 926 drawn out from the wireless communication terminal device is extended from the end of the shield wire (outer conductor) 925, and the drawn center conductor 924 and the shield wire 925 are used. The sleeve antenna structure is excited.

  With this configuration, the earphone antenna 900 is obtained by superimposing the audio signal and the high-frequency signal received by the antenna.

  In the above configuration, in the earphone antenna 900, the audio signal cable and the antenna cable are shared.

  Specifically, the center conductor 924 of the coaxial cable 926 is directly connected to one signal line 921 a of the earphone 910. The center conductor 924 is connected to the other signal line 921b of the earphone 910 via a capacitor 960 that has high impedance in the frequency band of the audio signal and low impedance in the frequency band of the high-frequency signal.

Further, the shield line 925 of the coaxial cable 926 is connected to one signal line 921b of the earphone 910 via a high-frequency choke 916 that has low impedance in the frequency band of the audio signal and high impedance in the frequency band of the high-frequency signal. Has been.
JP 2005-64742 A (published March 10, 2005)

  In the earphone antenna as described above, the audio signal and the high frequency signal received by the antenna are separated by a capacitor and a high frequency choke coil.

  With the recent increase in the speed of digital circuits, noise (noise) generated by the wireless communication terminal device main body, such as the CPU and the operation clock of the digital circuit, ranges from a low frequency to a high frequency. As a specific frequency, it has a very wide band ranging from several hundred kHz to several GHz, and is a noise source such as a received electromagnetic wave.

  Noise directly radiated from these wireless communication terminal devices affects the antenna cable as noise, or noise from the audio signal cable to the wireless communication terminal device.

  In order to suppress the influence of the noise, it is not sufficient to separate the noise component signal by the capacitor or the choke coil as described above. The conventional earphone antenna described above has a problem that it is greatly affected by electromagnetic noise from the wireless communication terminal device, and the reception sensitivity of the antenna is deteriorated.

  The present invention has been made in view of the above-described problems of the related art, and its purpose is that the earphone antenna device (or an antenna device having a similar configuration) has a configuration that uses only a capacitor and a choke coil as in the related art. An object of the present invention is to provide a technique capable of more effectively avoiding the influence of electromagnetic wave noise from a wireless communication terminal device and effectively improving the reception sensitivity of an antenna.

  As a result of intensive studies in view of the above problems, the present inventor has provided an antenna that has been shared with a pair of earphone cables in the earphone antenna device independently of the earphone cable, and one antenna for the pair of earphone cables. By connecting a single antenna coaxial cable to a pair of antennas, low-frequency to high-frequency noise radiated from a wireless communication terminal device or riding on a voice signal cable The present invention has been found to be not only less susceptible to the influence of propagating noise than in the past, but also applicable to the configuration of an antenna device alone that does not have the function of an earphone device. It came to complete.

  In order to solve the above-described problems, an earphone antenna device according to the present invention can be used by connecting to a terminal device having a wireless communication function, and the earphone antenna in which the earphone device and the antenna device are integrated. An earphone cable that is connected to a pair of left and right earphone units and supplies an audio signal to the earphone unit, one end is connected to the terminal device, and the other end is the two earphone cables A pair of cord-like antenna elements provided in a state of being insulated from each earphone cable and being integrated with the earphone cable, One end is connected to the terminal device, the other end is connected to the pair of antenna elements, and is insulated from the audio common cable And an antenna coaxial cable provided in an integrated state with the audio common cable, the earphone cable includes a signal line and a ground line, and the ground line of the earphone cable is connected to the earphone cable. By connecting to the ground line of the antenna coaxial cable via a high-frequency choke coil, the ground line for the antenna element and the ground line for the earphone unit are shared.

  The earphone antenna device according to the reference of the present invention can be used by connecting to a terminal device having a wireless communication function in order to solve the above-described problem, and earphone units are connected to the left and right sides of the support unit, respectively. An earphone antenna device in which an earphone device and an antenna device are integrated, each connected to the earphone unit and supplying an audio signal to the earphone unit, and one end connected to the terminal device A voice common cable connected to the two earphone cables at the other end, and further insulated from each of the earphone cables and in a state along the support portion. A pair of antenna elements provided along the left and right earphone parts from the center of the support part, and one end connected to the terminal device, and the other And an antenna coaxial cable that is connected to the pair of antenna elements, insulated from the audio common cable, and integrated with the audio common cable. Includes a signal line and a ground line. By connecting the ground line of the earphone cable to the ground line of the antenna coaxial cable via a high-frequency choke coil, the ground line for the antenna element and the earphone part are connected. It is characterized by sharing the ground line.

  Furthermore, in order to solve the above-described problem, the earphone antenna device according to the present invention can be used by connecting to a terminal device having a wireless communication function, and earphone units are connected to the left and right sides of the support unit, respectively. An earphone antenna device in which an earphone device and an antenna device are integrated, each connected to the earphone unit and supplying an audio signal to the earphone unit, and one end connected to the terminal device A voice common cable connected to the two earphone cables at the other end, and further insulated from each of the earphone cables and in a state along the support portion. A pair of antenna elements provided along the left and right earphones from the center of the support, and one end connected to the terminal device, the other An antenna coaxial cable provided with an end portion connected to the pair of antenna elements, insulated from the voice common cable, and integrated with the voice common cable; The coaxial cable includes a signal line and a ground line, and at least one of these lines is directly or indirectly connected to at least one of the antenna elements, and further includes a power supply means and a received signal amplifier. The power supply means supplies power to the received signal amplifying means, and the received signal amplifying means amplifies the received signals input from a pair of antenna elements and performs the unbalanced balance conversion. Output to the unbalanced terminal of the instrument.

Furthermore, in order to solve the above-mentioned problem, the earphone antenna device according to the present invention can be used by connecting to a terminal device having a wireless communication function, and the earphone device and the antenna device are integrated. An earphone antenna device, each connected to a pair of left and right earphone units, an earphone cable for supplying an audio signal to the earphone unit, one end connected to the terminal device, and the other end connected to the two A pair of cord-like antenna elements provided in a state of being insulated from each of the earphone cables and integrated with the earphone cable. One end is connected to the terminal device, the other end is connected to the pair of antenna elements, and is independent of the audio common cable. In state, and is characterized in that an antenna coaxial cable which is provided in the state of being integrated with the audio common cable.

  According to the above invention, the pair of string-like antenna elements and the earphone cable that supplies the audio signal to the pair of left and right earphone units are integrally formed in an electrically insulated state. The antenna coaxial cable connected to the pair of antenna elements and the audio common cable connected to the two earphone cables are integrally formed in an electrically insulated state.

  For this reason, since it becomes the structure which provides separately the track | line which comprises an audio | voice cable and an antenna, the influence of the electromagnetic wave noise from a radio | wireless communication terminal device can be suppressed.

The earphone antenna device according to the reference of the present invention can be used by connecting to a terminal device having a wireless communication function in order to solve the above-described problem, and earphone units are connected to the left and right sides of the support unit, respectively. An earphone antenna device in which an earphone device and an antenna device are integrated, each connected to the earphone unit and supplying an audio signal to the earphone unit, and one end connected to the terminal device A voice common cable connected to the two earphone cables at the other end, and further insulated from each of the earphone cables and in a state along the support portion. A pair of antenna elements provided along the left and right earphone parts from the center of the support part, and one end connected to the terminal device, and the other And an antenna coaxial cable that is connected to the pair of antenna elements, is insulated from the voice common cable, and is integrated with the voice common cable. Yes.

  According to said invention, it is provided with a pair of antenna element provided along the left and right earphone part from the center part of the said support part along the support part connected to the right and left earphone part. The antenna coaxial cable connected to the pair of antenna elements and the audio common cable connected to the two earphone cables are integrally formed in an electrically insulated state.

  For this reason, since it becomes the structure which provides separately the track | line which comprises an audio | voice cable and an antenna, the influence of the electromagnetic wave noise from a radio | wireless communication terminal device can be suppressed.

In the earphone antenna device according to the reference of the present invention, the antenna element is preferably formed in a string shape or a plate shape.

  Thereby, the antenna element is formed in accordance with the shape of the support portion. When these antenna elements are formed on a plate conductor having a width of about 3 mm to 20 mm or a conductor line having a diameter of 1 mm or more, it is easy to obtain good gain and bandwidth as an antenna.

Moreover, in the earphone antenna device according to the reference of the present invention, it is preferable that the support part includes a length adjusting part that adjusts the length of the support part.

  Accordingly, the size of the earphone antenna device can be adjusted, and the earphone antenna device can be fixed at an appropriate position of the user.

In the earphone antenna device according to the reference of the present invention, it is preferable that the support portion and the earphone portions provided on the left and right sides are surrounded and a spacer is provided along the support portion.

  Thereby, a space can be formed between the earphone antenna device and the user's head by the spacer, and the user's head and the antenna element are not brought into close contact with each other. Therefore, good reception characteristics can be obtained.

The earphone antenna device according to the reference of the present invention further includes power supply means, and the power supply means preferably supplies power to the left and right antenna elements from the central portion of the support portion.

  This makes it possible to use various antenna elements that require power feeding, such as plate-like antenna elements. That is, it is possible to configure an antenna that receives signals with high sensitivity while reducing the influence of the human body.

In the earphone antenna device according to the reference of the present invention, the antenna coaxial cable includes a signal line (signal conductor) and a ground line (ground conductor), and at least one of the string-like antenna elements includes It is preferable that at least one of each line is connected directly or indirectly.

In the earphone antenna device according to the reference of the present invention, the antenna coaxial cable includes a signal line and a ground line, and at least one of these lines is directly or indirectly connected to at least one of the antenna elements. Are preferably connected.

  Thereby, since the string-like antenna element is connected to the terminal device by the antenna coaxial cable, the line from the wireless communication terminal that radiates noise to the antenna element can be connected while suppressing the influence of noise.

In the earphone antenna apparatus according to the reference of the present invention, an unbalanced balance converter (balun) is further provided between the pair of antenna elements and the antenna coaxial cable, and the signal line of the antenna coaxial cable and The ground line is connected to the unbalanced terminal of the unbalanced balanced converter, while the pair of antenna elements are respectively connected to the balanced terminals of the unbalanced balanced converter so that each line of the antenna coaxial cable is paired with the pair of antennas. It is preferable to be indirectly connected to the element.

  As a result, the pair of antenna elements and the antenna coaxial cable are connected by an unbalanced balance converter (balun), and are connected to the terminal device by the antenna coaxial cable, so that the line from the wireless communication terminal that emits noise to the antenna element Can be connected with less influence of noise.

  Furthermore, the balanced / unbalanced converter has a band-pass characteristic and functions as a filter that suppresses transmission of frequency components outside the intended transmission band. Therefore, low-frequency components and high-frequency components other than the band to be transmitted as a received signal. Noise (noise) can be suppressed.

The earphone antenna device according to the reference of the present invention further includes power supply means and reception signal amplification means, and the power supply means supplies power to the reception signal amplification means, and the reception signal amplification means. However, it is preferable that the reception signals input from the pair of antenna elements are amplified and output to the unbalanced terminals of the unbalanced / balanced converter.

  As a result, the received signal input from the antenna element is amplified and then output to the unbalanced terminal of the unbalanced / balanced converter, so that the influence of the noise on the line from the wireless communication terminal that emits noise to the antenna element is suppressed. be able to.

In the earphone antenna device according to the reference of the present invention, the signal line of the antenna coaxial cable is directly connected to one of the pair of antenna elements, and the ground line of the antenna coaxial cable is directly connected to the other antenna element. It is preferable.

  Thereby, since the string-like antenna element is connected to the terminal device by the antenna coaxial cable, the line from the wireless communication terminal that radiates noise to the antenna element can be connected while suppressing the influence of noise.

  Further, since the pair of antenna elements are directly connected to the coaxial cable, it is not necessary to use the balance-unbalance converter, and the configuration can be made at low cost.

In the earphone antenna device according to the reference of the present invention, the earphone cable includes a signal line and a ground line, and the ground line of the earphone cable is connected to the ground line of the antenna coaxial cable via a high-frequency choke coil. By connecting, it is preferable to share the grounding line for the antenna element and the grounding line for the earphone unit.

  As a result, the ground line of the earphone cable is connected to the ground line for the antenna element via the high-frequency choke that suppresses the transmission of the high-frequency signal, and the ground line for the antenna element and the ground line for the earphone unit can be shared. it can. With this configuration, the wiring can be simplified and the configuration can be further reduced.

Further, in the earphone antenna device according to the reference of the present invention, a connection terminal is provided at an end of the integrated audio common cable and antenna coaxial cable on the side connected to the terminal device. Is preferred. The connection terminal may be configured to be provided independently for each of the audio common cable and the antenna coaxial cable, or provided as one multipolar connector connected to both the audio common cable and the antenna coaxial cable. It is good also as a structure.

  Thereby, since the audio common cable and the antenna coaxial cable are connected by the connection terminal, they can be used in combination with various wireless communication terminals. The wireless communication terminal may be a device that performs wireless communication using, for example, a removable wireless communication module.

  When the connection terminals for the audio common cable and antenna coaxial cable and the terminal equipment are provided independently, the audio signal at the connection terminal and the received signal and wiring are different, so there is no need to separate wavelength bands. The baseband part noise from the wireless communication terminal included in the wireless communication terminal is difficult to be transmitted.

  In addition, when the connection terminal between the voice common cable and the antenna coaxial cable and the terminal device is provided as one multipolar connector and connected to both the voice common cable and the antenna coaxial cable, It can be connected to and disconnected from a communication terminal with a single insertion / extraction, making it easy to use.

Further, in the earphone antenna device according to the reference of the present invention, the pair of string-like antenna elements are not integrated with the earphone antenna, but are accommodated in an insulating covering body having an outer shape that can be mounted on any equipment object. In this case, the insulation covering may have a strap-like outer shape.

Furthermore, in the earphone antenna device according to the reference of the present invention, the pair of antenna elements is not integrated with the earphone antenna, but is housed in an insulation covering body having an outer shape that can be mounted on an arbitrary object to be equipped. It may be provided in a state independent of the cable, and in this case, the insulating covering may have a strap-like outer shape.

  As a result, the earphone antenna device can be mounted on an arbitrary object to be equipped, or can be semi-fixed for ease of use depending on the shape of the insulator. Furthermore, if it is a strap-like outer shape, it can be easily hung on an object to be equipped or a neck of a human body.

A dipole antenna device according to a reference of the present invention is an antenna device that can be used by connecting to a terminal device having a wireless communication function in order to solve the above-described problem. An antenna coaxial cable connected to the antenna element, an unbalanced balance converter (balun) provided between the pair of antenna elements and the antenna coaxial cable, and a pair of string-like antenna elements Is characterized by comprising at least a flexible line.

  According to said invention, a pair of string-like antenna element which consists of a flexible track | line is connected with the antenna coaxial cable via the unbalanced balance converter (balun), and comprises the dipole antenna.

  For this reason, since the cable from the wireless communication terminal to the balance-unbalance converter is composed of the antenna coaxial cable, it is possible to connect the line from the wireless communication terminal that emits noise to the antenna element while suppressing the influence of noise. it can.

  Furthermore, the balanced / unbalanced converter has a band-pass characteristic and functions as a filter that suppresses transmission of frequency components outside the intended transmission band. Therefore, low-frequency components and high-frequency components other than the band to be transmitted as a received signal. Noise (noise) can be suppressed.

  Moreover, since a pair of string-like antenna element consists of a track | line which has flexibility, the shape of a dipole antenna can be changed as needed.

Further, in the dipole antenna device according to the reference of the present invention, the pair of string-like antenna elements are housed in an insulating covering body, and the insulating covering body has an outer shape that can be mounted on any equipment object. It is preferable to have it, and the said insulation coating body may have a strap-like external shape.

  Thereby, the dipole antenna device can be mounted on an arbitrary object to be mounted depending on the shape of the insulator, or can be semi-fixed for easy use. Furthermore, if it is a strap-like outer shape, it can be easily hung on an object to be equipped or a neck of a human body.

  In order to solve the above-described problem, a wireless communication terminal according to the present invention includes the above-described earphone antenna device.

In addition, a wireless communication terminal according to the reference of the present invention includes the earphone antenna device or the dipole antenna device described above in order to solve the above problems.

  According to the above invention, since the antenna provided in the wireless communication terminal is the above-described earphone antenna device or the above-described dipole antenna device, the wireless communication terminal that is not easily affected by noise from the wireless communication terminal and has excellent reception characteristics is provided. Can be provided.

  The wireless communication terminal of the present invention may be portable. By providing the earphone antenna device or the dipole antenna device described above, it is possible to carry a wireless communication terminal that is hardly affected by noise from the wireless communication terminal and has excellent reception characteristics.

  In order to solve the above-described problems, an earphone antenna device according to the present invention can be used by connecting to a terminal device having a wireless communication function, and the earphone antenna in which the earphone device and the antenna device are integrated. An earphone cable that is connected to a pair of left and right earphone units and supplies an audio signal to the earphone unit, one end is connected to the terminal device, and the other end is the two earphone cables A pair of cord-like antenna elements provided in a state of being insulated from each earphone cable and being integrated with the earphone cable, One end is connected to the terminal device, the other end is connected to the pair of antenna elements, and is insulated from the audio common cable And an antenna coaxial cable provided in an integrated state with the audio common cable, the earphone cable includes a signal line and a ground line, and the ground line of the earphone cable is connected to the earphone cable. By connecting to the ground line of the antenna coaxial cable via a high-frequency choke coil, the ground line for the antenna element and the ground line for the earphone unit are shared.

  The earphone antenna device according to the reference of the present invention can be used by connecting to a terminal device having a wireless communication function in order to solve the above-described problem, and earphone units are connected to the left and right sides of the support unit, respectively. An earphone antenna device in which an earphone device and an antenna device are integrated, each connected to the earphone unit and supplying an audio signal to the earphone unit, and one end connected to the terminal device A voice common cable connected to the two earphone cables at the other end, and further insulated from each of the earphone cables and in a state along the support portion. A pair of antenna elements provided along the left and right earphone parts from the center of the support part, and one end connected to the terminal device, and the other And an antenna coaxial cable that is connected to the pair of antenna elements, insulated from the audio common cable, and integrated with the audio common cable. Includes a signal line and a ground line. By connecting the ground line of the earphone cable to the ground line of the antenna coaxial cable via a high-frequency choke coil, the ground line for the antenna element and the earphone part are connected. It is characterized by sharing the ground line.

  Furthermore, in order to solve the above-described problem, the earphone antenna device according to the present invention can be used by connecting to a terminal device having a wireless communication function, and earphone units are connected to the left and right sides of the support unit, respectively. An earphone antenna device in which an earphone device and an antenna device are integrated, each connected to the earphone unit and supplying an audio signal to the earphone unit, and one end connected to the terminal device A voice common cable connected to the two earphone cables at the other end, and further insulated from each of the earphone cables and in a state along the support portion. A pair of antenna elements provided along the left and right earphones from the center of the support, and one end connected to the terminal device, the other An antenna coaxial cable provided with an end portion connected to the pair of antenna elements, insulated from the voice common cable, and integrated with the voice common cable; The coaxial cable includes a signal line and a ground line, and at least one of these lines is directly or indirectly connected to at least one of the antenna elements, and further includes a power supply means and a received signal amplifier. The power supply means supplies power to the received signal amplifying means, and the received signal amplifying means amplifies the received signals input from a pair of antenna elements and performs the unbalanced balance conversion. Output to the unbalanced terminal of the instrument.

Furthermore, the earphone antenna device according to the reference of the present invention is a pair of string-like antenna elements provided in a state of being insulated from each earphone cable and integrated with the earphone cable as described above. One end is connected to the terminal device, the other end is connected to the pair of antenna elements, and is insulated from the voice common cable and integrated with the voice common cable. And an antenna coaxial cable provided.

Further, as described above, the earphone antenna device according to the reference of the present invention is in a state of being insulated from each of the earphone cables and in a state along the support portion from the center portion of the support portion. In a state where a pair of antenna elements provided along the earphone part, one end is connected to the terminal device, the other end is connected to the pair of antenna elements, and insulated from the audio common cable And the antenna coaxial cable provided in the state integrated with the said audio | voice common cable is provided.

  Therefore, the audio cable and the line constituting the antenna are provided separately, and the line constituting the antenna is constituted by the antenna coaxial cable, so that the influence of electromagnetic noise from the wireless communication terminal can be suppressed. it can.

  That is, there is an effect that it is possible to provide an earphone antenna device that is not easily affected by low-frequency to high-frequency noise radiated from a wireless communication terminal or noise propagated on an audio signal cable.

As described above, the dipole antenna device according to the present invention includes a pair of string-like antenna elements, an antenna coaxial cable connected to the pair of antenna elements, and the pair of antenna elements and the antenna coaxial cable. An unbalanced balance converter (balun) provided between them is provided, and the pair of string-like antenna elements is composed of at least a flexible line.

  Therefore, since the line constituting the antenna is constituted by the antenna coaxial cable, it is possible to suppress the influence of electromagnetic noise from the radio communication terminal. Moreover, since a pair of string-like antenna element consists of a track | line which has flexibility, the shape of a dipole antenna can be changed as needed.

  That is, a dipole antenna device that is not easily affected by low-frequency to high-frequency noise radiated from a wireless communication terminal or noise that propagates on an audio signal cable and that can change the shape of the antenna as necessary. There is an effect that it can be provided.

  As described above, the wireless communication terminal of the present invention includes the earphone antenna device described above.

In addition, the wireless communication terminal according to the reference of the present invention includes the earphone antenna device or the dipole antenna device as described above.

  Therefore, there is an effect that it is possible to provide a wireless communication terminal that is not easily affected by low-frequency to high-frequency noise radiated from the wireless communication terminal and noise propagated on the audio signal cable.

[Embodiment 1]
An embodiment according to the present invention will be described below with reference to FIGS.

  FIG. 2 is a sketch of the earphone antenna device 100 and the wireless communication terminal 200 according to the present embodiment.

  The earphone antenna device 100 includes earphone units 111 and 112 and a cable 120. The wireless communication terminal 200 is assumed to be a portable TV, for example.

  In this embodiment, a portable TV is described as an example, but the wireless communication terminal 200 is not limited to this. The wireless communication terminal used in the present invention may be a terminal device having a wireless communication function, and a terminal device that receives various broadcasts other than TV can be suitably used. Further, the wireless communication terminal 200 is not limited to a portable type, and it goes without saying that it can be used even with various types of stationary terminal devices (for example, stationary TVs).

  The wireless communication terminal 200 includes a display 201 and a TV tuner 202.

  Further, as shown in FIG. 3, a device that performs wireless communication using a detachable wireless communication module 203 may be used. The wireless communication module 203 includes a wireless communication function such as a TV tuner 202 and is configured to be detachable from a terminal device 200 ′ including a display device such as a display 201. With this configuration, for example, the terminal device 200 ′ can perform wireless communication by mounting the wireless communication module 203 on the terminal device 200 ′ that does not have a wireless communication function. The wireless communication module 203 and the terminal device 200 ′ may be connected by a well-known connection method such as USB connection, or connected to a connection bus dedicated to the device, for example, an expansion slot of a portable terminal. It is also good.

  The earphone antenna device 100 includes an antenna terminal 331a and an earphone terminal 332a at the tip of the cable 120. The wireless communication terminal 200 includes plug terminals 331b and 332b, and the antenna (RF) terminal 331a and the earphone terminal 332a of the earphone antenna apparatus 100 are connected to the plug terminals 331b and 332b of the wireless communication terminal 200. The

  In the present embodiment, the antenna terminal 331a and the earphone terminal 332a are configured independently of each other.

  Next, the configuration of the earphone antenna device 100 will be described with reference to FIG.

  The left and right earphone units 111 and 112 are electrically connected to the earphone terminal 332a by audio cables 121 and 122 that transmit audio signals. Further, the first antenna element 113 and the second antenna element 114 extending along the audio cables 121 and 122 (hereinafter simply referred to as “antenna element 113” or “antenna element 114” for convenience of explanation). ) And are provided.

  For example, if these antenna elements are conductor lines having a diameter of 1 mm or more, it is easy to obtain good gain and bandwidth as an antenna.

  The front ends of the antenna elements 113 and 114 are disposed along the audio cables 121 and 122, and the other ends of the antenna elements 113 and 114 are connected to a balanced terminal of the balanced / unbalanced converter 115. ing.

  At the unbalanced terminal of the balanced / unbalanced converter 115, the signal output is connected to the signal line 124 of the coaxial cable 126 and the ground output is connected to the ground line 125 of the coaxial cable 126.

  Received signals received by the antenna elements 113 and 114 are converted into an unbalanced mode by a balanced / unbalanced converter 115. The received signal is transmitted as a coaxial line from the balanced / unbalanced converter 115 to the antenna terminal 331a.

  On the other hand, in the audio cables 121 and 122, the ground line portions of the right audio cable 121 and the left audio cable 122 are electrically connected in the balanced / unbalanced converter 115 portion to form a common ground line, and are connected to the earphone terminal 332a. Connected. The audio cable 123 is composed of three cables: a right audio signal line, a left audio signal line, and a common ground line.

  The antenna elements 113 and 114 and the audio cables 121 and 122 are respectively covered with an insulator, and the antenna element 113 and the audio cable 121 and the antenna element 114 and the audio cable 122 are an insulator. Each is covered and integrated.

  Further, the coaxial cable 126 including the balanced / unbalanced converter 115 and the audio cable 123 for transmitting audio signals are each covered with an insulator, and then further covered with the insulator. These cables are integrated as described above, and are apparently configured integrally as one cable 120.

  Here, the lengths of the antenna elements 113 and 114 are determined by the operating area of the antenna.

  This length can be appropriately determined depending on, for example, the center frequency of the radio wave band to be used.

  For example, if the operating area of the antenna is a radio wave in the UHF band, specifically, if it is a TV broadcast in the vicinity of 470 MHz to 600 MHz, the lengths L1 and L2 of the antenna elements 113 and 114 are each ¼ of the wavelength. The length is about 15 cm. At this time, the antenna elements 113 and 114 are constituted by the conductor lines having the above lengths before the audio cables 121 and 122 are routed to the earphone part.

  If the antenna operating band is a radio wave in the VHF band, specifically, a radio wave in the vicinity of 250 MHz, the lengths L1 and L2 of the antenna elements 113 and 114 are about ¼ of the wavelength. Of about 30 cm. Also at this time, the antenna elements 113 and 114 are constituted by the conductor lines having the above-mentioned length by the way toward the earphone units 111 and 112 to which the audio cables 121 and 122 are branched.

  If the operating band of the antenna is the FM broadcast band, the lengths L1 and L2 of the antenna elements 113 and 114 are about 80 cm, which is about 1/4 of the wavelength. Also at this time, the antenna elements 113 and 114 are constituted by the conductor lines having the above-mentioned length by the way toward the earphone units 111 and 112 to which the audio cables 121 and 122 are branched.

  In this case, the earphone unit 111 or 112 may be configured with a conductor such as an aluminum metal plate, and the antenna elements 113 and 114 may be configured including the earphone unit 111 or 112.

  Moreover, as shown in FIG. 4, the earphone unit may be configured with a line made of an antenna element formed in a spiral shape, and the lengths L1 and L2 of the antenna element may be increased. FIG. 4 shows a configuration in which an antenna element 114a formed in a spiral shape is provided in the earphone unit 112a. In this case, for example, by forming the spiral antenna element 114a formed in the earphone part 112a by patterning with a metal line, it can be formed with high accuracy and reproducibility.

  In the embodiment described above, the antenna (RF) connection antenna terminal 331a and the audio signal output earphone terminal 332a of the earphone antenna apparatus 100 are configured independently of each other.

  Next, the operation of the earphone antenna device 100 in the present embodiment will be described with reference to FIG.

  In the earphone antenna device 100, the antenna element 113 and the antenna element 114 constitute a dipole antenna. The reception signals received by the antenna element 113 and the antenna element 114 are balanced signals, and are converted into coaxial mode (unbalanced signal) RF signals by the balanced / unbalanced converter 115. The converted RF signal is transmitted to the coaxial cable 126 and input to the TV tuner 202 of the wireless communication terminal 200 via the connector 331 to which the antenna terminal 331a and the plug terminal 331b are connected.

  The balanced / unbalanced converter 115 has a band-pass characteristic, and a frequency component outside the intended band for transmission functions as a filter for suppressing transmission.

  Specifically, the balanced / unbalanced converter 115 is known to be formed by configuring a transformer with a bridge type or ladder type constituted by an LC circuit, or a coil wound around a ferrite core. Yes.

  As the bridge-type or ladder-type balanced / unbalanced converter configured by the LC circuit, one having a bandpass characteristic having a narrow band characteristic of about 450 MHz to 700 MHz is known as an example. Further, in the above-described balanced / unbalanced converter formed by forming a transformer with a coil wound around a ferrite core, a transmission characteristic of about 100 MHz to 1 GHz is known.

  For example, as a noise component generated from the wireless communication terminal 200, noise due to a clock component from a digital circuit, etc. can be considered. However, the above noise can be attenuated.

  Further, by suppressing these noises of several tens of MHz, it is possible to reduce the noise in the component outside the reception band that is recombined with the wireless communication terminal 200. That is, it is possible to reduce the fundamental component of the noise generated from the digital circuit of the wireless communication terminal 200 and the harmonic component due to the non-linear action. As a result, there is an effect that noise in the antenna operating band can also be suppressed.

  In addition, it is known that the noise generated from the wireless communication terminal 200 has an excellent common mode noise component. For this reason, when the above-described balanced / unbalanced converter is used, in-phase noise components are easily coupled to the signal line and the ground line transmitted from the unbalanced circuit (the antenna circuit on the wireless communication terminal 200 side). However, since the anti-phase distribution is performed on the balanced circuit side (antenna feeding unit), it is possible to suppress the coupled noise due to the phase cancellation effect.

  Therefore, the balanced / unbalanced converter 115 according to the present embodiment can suppress noise (noise) of low frequency components and high frequency components other than the band to be transmitted as the received signal.

  The TV tuner 202 selects a received signal input by a channel selected by the user, demodulates, and generates a baseband signal, for example, in the same manner as a well-known TV receiver. As the baseband signal, a TV reception signal or an audio signal is extracted by, for example, digital signal processing, and is output from the display 201 or the speaker provided in the wireless communication terminal 200.

  In addition, the TV reception signal may be extracted from the wireless communication terminal 200 and displayed on an external display device, or the audio signal may be extracted from the wireless communication terminal 200 and reproduced.

  The audio signal can be taken out from the plug terminal 332b provided in the wireless communication terminal 200 via the connector 332, transmitted through the audio cables 121 and 122, and output from the left and right earphone units 111 and 112.

  In the conventional earphone antenna device, the audio cable and the electric wire constituting the antenna are the same line. For this reason, the noise of the wireless communication terminal device itself mixed in the sound output of the wireless communication terminal device, for example, the noise caused by the digital circuit propagates to the sound cable, and causes noise to the antenna elements constituting the antenna.

  In addition, some conventional earphone antenna devices are provided with a mechanism that separates the noise component signal by a capacitor or choke coil in order to suppress the influence of noise, but these mechanisms alone separate the above noise. It was insufficient to do. That is, the conventional earphone antenna described above has a problem in that it is greatly affected by electromagnetic noise from the wireless communication terminal device and the reception sensitivity of the antenna is deteriorated.

  In the earphone antenna device 100 according to the present embodiment, the antenna elements 113 and 114 and the coaxial cable 126 that transmit the reception signal, including the ground terminal, and the audio cable 123 that transmits the audio signal are separated by an insulator. The operation is performed using an independent line as an electric circuit.

  For this reason, it is difficult for low-frequency to high-frequency noise transmitted by the wireless communication terminal 200 transmitted through the plug terminal 332b of the wireless communication terminal 200 to be coupled to the coaxial cable 126 constituting the antenna.

  In addition, since the cable from the wireless communication terminal 200 to the balanced / unbalanced converter 115 is configured by the coaxial cable 126, the electric wire constituting the antenna is from the wireless communication terminal 200 that emits noise as described above. The antenna circuit can be kept away from noise. Since the noise radiated from the wireless communication terminal 200 is an electromagnetic wave in the near field from the frequency component (˜3 GHz), the magnitude of the noise is inversely proportional to the square and the third power of the distance from the wireless communication terminal 200. In order to reduce noise, it is effective to keep the antenna circuit away from the wireless communication terminal 200 because it has components.

  In the present embodiment, the earphone antenna device 100 can be held when the antenna portion is put on the neck, and the wireless communication terminal 200 can be held by a hand or the like near the abdomen or on the knee. By adopting the configuration as described above, the distance between the wireless communication terminal 200 and the antenna elements 113 and 114 can be secured by several tens of centimeters or more via a coaxial line.

  For this reason, the influence of noise can be reduced by moving the antenna circuit away from the wireless communication terminal 200 as described above.

  In addition, since the human body is held by hand or near the radio communication terminal 200 and the antenna elements 113 and 114, noise generated by the radio communication terminal 200 can be absorbed by the hand or the human body.

  Note that it is desirable to provide low-pass filter means for cutting a high-frequency signal of, for example, 100 MHz or higher, which is a TV broadcast wave frequency band, before the plug terminal 332b for outputting the audio signal of the wireless communication terminal 200. The low-pass filter means suppresses the noise generated by the wireless communication terminal 200 from being transmitted to the audio cable 123, thereby further suppressing the noise coupled to the antenna elements 113 and 114 or the coaxial cable 126 from the audio cable 123. Can be bigger.

  In radio communication terminal 200 according to the present embodiment, it is preferable that the ground line for the audio signal and the ground line for the antenna are configured independently.

  Further, the antenna terminal 331a and the earphone terminal 332a of the earphone antenna device 100 are integrally configured with a multi-pin connector 333 like the earphone antenna device 100a shown in FIG. 5, and the plug terminals 331b and 312b of the wireless communication terminal 200 are combined. Can be configured as a multi-pin connector (not shown) having a shape corresponding to the multi-pin connector 333.

  If the connection terminals are formed integrally with a multi-pin connector like the earphone antenna device 100a, it is not necessary to separately provide the antenna terminal 331a and the earphone terminal 332a, and the earphone antenna device 100a and the wireless communication by the user are not required. Since the connection with the terminal 200 can be performed by connecting and disconnecting the connector once, a more convenient configuration can be obtained.

  Further, the insulators of the cables 121 and 122 that transmit the left and right sounds may be branched, and the insulating unit 140 may be configured in a loop shape like the earphone antenna device 100b illustrated in FIG. Further, like the earphone antenna device 100b 'shown in FIG. 7, the insulating portion 141 may be formed in a string shape.

  By configuring the insulating portion 140 and the insulating portion 141 as described above, the earphone antenna device 100b or the earphone antenna device 100b ′ of the present embodiment can be easily put on the neck, or can be semi-fixed for easy use. Is also possible.

  Even in such an example, the earphone antenna device 100b or the earphone antenna device 100b 'according to the present embodiment includes the antenna element 113 and the antenna element 114 independently.

  In the earphone antenna device 100b or the earphone antenna device 100b ′, since the insulating portion 140 and the insulating portion 141 are configured in a loop shape or a string shape, the antenna elements 113 and 114 are formed in a loop shape to You may comprise in the part 140. FIG.

  As described above, in this embodiment, the antenna element 113 and the antenna element 114 may be integrated with the audio cable 121 and the audio cable 122, respectively, or provided in a state independent of the audio cable 121 and the audio cable 122. May be. In this case, the specific shapes of the insulating element 140 and the insulating part 140 that cover the antenna element 114 and the insulating part 141 are not particularly limited, and are appropriate depending on the use of the earphone antenna devices 100b and 100b ′, etc. Should be selected.

  In particular, in the case where a portable terminal device is used as the wireless communication terminal 200 as in the present embodiment, for example, a loop shape that is easy to hang around the neck in order to make it easy for the user to wear the earphone antenna device 100b. The strap-like outer shape can be obtained. Furthermore, other shapes known in the art can be used to make it easier to equip other than the neck, and an external shape that allows not only the user to wear but also any object can be used. You can also

  As described above, in the present invention, the antenna element 113 and the antenna element 114 are provided in an insulating covering body having an outer shape that can be mounted on an arbitrary object to be equipped (which may be a user or other object). It may be accommodated and provided in a state independent of the earphone cable.

  In addition, from the above configuration, one of the antenna elements 113 or 114 is connected to the signal line 124 of the coaxial cable 126 without using the balanced / unbalanced converter 115 and the other is connected to the ground line 125 of the coaxial cable 126. It is good also as a structure.

  In FIG. 8, the balanced / unbalanced converter 115 is removed from the earphone antenna device 100, the first antenna element 113 is connected to the ground line 125, and the second antenna element 114 is connected to the signal line 124. The antenna device 100c has been described.

  Since the antenna has a substantially symmetrical structure as shown in FIG. 8, even if the first antenna element 113 and the second antenna element 114 are connected to the signal line 124 and the ground line 125, respectively. Good.

  Further, a multi-pin connector 333 as shown in FIG. 5 may be provided, or a loop shape as shown in FIG. 6 or a string-like insulating portion 140 or insulating portion 141 as shown in FIG. 7 may be provided. Good.

  Even the earphone antenna device 100c configured as described above can operate as an antenna. In addition, since the balanced / unbalanced converter 115 is not required, the configuration can be simplified more easily at low cost.

  In other words, in the earphone antenna device according to the present invention, at least one of the signal line 124 and the ground line 125 of the coaxial cable 126 is connected to at least one of the first antenna element 113 and the second antenna element 114. If the operation as an antenna is enabled, the balanced / unbalanced converter 115 is not essential.

  Accordingly, in the present invention, as shown in FIG. 1 and the like, in the case of the earphone antenna device 100 including the balanced / unbalanced converter 115, the signal line 124 and the ground line 125 of the coaxial cable 126 are connected to the balanced / unbalanced converter. The signal line 124 of the coaxial cable 126 may be connected to the first antenna element 113 and the first antenna element 113 and the second antenna element 114 via 115, as shown in FIG. Alternatively, the first antenna element 114 and the second antenna element 114 may be directly connected to each other, and the ground line 125 may be directly connected to the other.

  As described above, in the present embodiment, the earphone antenna device shared by the earphone and the antenna has been described. However, as shown in FIG. 9, the earphone units 111 and 112 and the audio cables 121 and 122 for transmitting the audio are removed and hung around the neck. It may be configured as a string-like antenna device 101 to be used.

[Embodiment 2]
Another embodiment of the present invention will be described below with reference to FIGS.

  Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  The headphone antenna device 400 of the present embodiment has a shape in which the left and right earphones of the earphone antenna device are fixed by a support portion, and is a modification of the earphone antenna device. That is, in the headphone antenna apparatus 400 of the present embodiment, the left earphone unit 411 is connected to the left earphone support unit 441, the right earphone unit 412 is connected to the right earphone support unit 442, and the left earphone support unit 441 and the right earphone support are supported. The headphone part of the headphone antenna device 400 is formed by connecting the parts 442 to each other. The earphone parts 411 and 412 may be shaped to be inserted into the ear holes, or the earphone support parts 441 and 442 may be shaped to press and fix the ears from the left and right sides of the user's ears.

  The left earphone support portion 441 and the right earphone support portion 442 may be made of any material as long as it is a member that can fix the left earphone portion 411 and the right earphone portion 412 to the position of the ear. May be formed. In addition, the headphone antenna device 400 according to the present embodiment has a joint between the left earphone support unit 441 and the right earphone support unit 442 or between the earphone units 411 and 412 corresponding to the respective earphone support units 441 and 442. The support portion length adjusting portion 444 provided by a known method may be provided. The size of the headphone antenna device 400 can be adjusted by the length adjusting unit 444, and the headphone antenna device 400 can be fixed at an appropriate position of the user.

  Moreover, the headphone antenna apparatus 400 of the present embodiment is used by being connected to the wireless communication terminal 200 as in the first embodiment. In this embodiment, an example in which the wireless communication terminal 200 is a portable TV is described. However, the wireless communication terminal 200 is not limited to this as in Embodiment 1, and any terminal device having a wireless communication function may be used. Good.

  Further, the headphone antenna device 400 of the present embodiment includes the antenna terminal 431a and the earphone terminal 432a at the tip of the cable 420. These correspond to the antenna terminal 331a and the earphone terminal 332a of the first embodiment. Are connected to the plug terminals 331b and 332b of the wireless communication terminal 200.

  In the present embodiment, the antenna terminal 431a and the earphone terminal 432a are configured independently of each other. However, like the earphone antenna apparatus 100a shown in FIG. The plug terminals 331b and 312b of the terminal 200 may be configured as a multi-pin connector (not shown) having a shape corresponding to the multi-pin connector 333.

  Further, in headphone antenna apparatus 400 of the present embodiment, left earphone unit 411 and right earphone unit 412 are electrically connected to earphone terminal 432a by audio cables 421 and 422 for transmitting audio signals. In the headphone antenna device 400 of the present embodiment, the audio cables 421 and 422 are separated from the cable 420 and connected to the left earphone unit 411 and the right earphone unit 412. As shown in FIG. 11, the left earphone unit 411a And the right earphone unit 412a may be connected to the other earphone unit via one of the earphone units. FIG. 11 shows a configuration in which the audio cables 421 and 422 pass through the left earphone unit 411, and the right audio cable 422 passes through the left earphone unit 411, the left earphone support unit 441, and the right earphone support unit 442. The right earphone unit 412 is connected.

  Further, the first antenna element 413 and the second antenna element 414 (hereinafter simply referred to as “antenna element 413” or “antenna element 414” for convenience of explanation) are respectively connected to the left earphone support portion 441. A right earphone support 442 is provided. The antenna element 413 and the antenna element 414 are formed of a conductor line or a conductor plate. For example, if these antenna elements are on-plate conductors having a width of about 3 mm to 20 mm or conductor lines having a diameter of 1 mm or more, it is easy to obtain good gain and bandwidth as an antenna. Moreover, it can form according to the shape of the left and right earphone support parts 441,442. Further, the left and right earphone support portions 441 and 442 themselves may constitute left and right antenna elements 413 and 414, respectively. In this case, the left and right antenna elements 413 and 414 may be configured to be electrically insulated at the joint between the left and right earphone support portions 441 and 442.

  The tip of the antenna element 413 is disposed along the left earphone support 441, and the tip of the antenna element 414 is disposed along the right earphone support 442. The other ends of the antenna elements 413 and 414 are connected to the balanced terminal of the balanced / unbalanced converter 415. The balanced / unbalanced converter 415 may be provided near the connection portion between the left earphone support 441 and the right earphone support 442 as shown in FIG. Alternatively, the left and right earphone support portions 441 and 442, the left and right earphone portions 411 and 412, and the length adjustment portion 444 may be provided.

  At the unbalanced terminal of the balanced / unbalanced converter 415, the signal output is connected to the signal line 424 of the coaxial cable 426, and the ground output is connected to the ground line 425 of the coaxial cable 426. In FIG. 10, since the balanced / unbalanced converter 415 is provided near the connection portion between the left earphone support portion 441 and the right earphone support portion 442, the coaxial cable 426 includes the left earphone support portion 441 and the left earphone portion 411. The cable 420 is shown as being assembled with the audio cables 421 and 422 via the cable, but a known wiring arrangement change such as a structure via the right earphone support unit 442 is appropriately performed. Also good.

  Received signals received by the antenna elements 413 and 414 are converted into an unbalanced mode by a balanced / unbalanced converter 415. The received signal is transmitted as a coaxial line from the balanced / unbalanced converter 415 to the antenna terminal 431a.

  On the other hand, in the audio cables 421 and 422, the ground line portions of the left audio cable 421 and the right audio cable 422 are electrically connected to the balanced / unbalanced converter 415 to form a common ground line, and are connected to the earphone terminal 432a. Connected. The audio cable 423 includes three cables, a right audio signal line, a left audio signal line, and a common ground line.

  The antenna elements 413 and 414 and the audio cables 421 and 422 are covered with an insulator, respectively, and the antenna element 413 and the left audio cable 421, and the antenna element 414 and the right audio cable 422 are insulated. Each body is covered and integrated.

  Further, the coaxial cable 426 including the balanced / unbalanced converter 415 and the audio cable 423 for transmitting an audio signal are each covered with an insulator, and further covered with the insulator. These cables are integrated as described above, and are apparently configured integrally as one cable 420.

  Here, the lengths of the antenna elements 413 and 414 are determined by the operating area of the antenna, as in the first embodiment. For example, if the antenna operating area is a UHF band radio wave, the lengths L1 and L2 of the antenna elements 413 and 414 are about 15 cm, and if the antenna operating area is a VHF band radio wave, The lengths L1 and L2 of the antenna elements 413 and 414 are about 30 cm, respectively. If the operating area of the antenna is the FM broadcast band, the lengths L1 and L2 of the antenna elements 413 and 414 are about It is about 80 cm. Further, as in the first embodiment, the left earphone unit 411 or the right earphone unit 412 is configured by a conductor such as an aluminum metal plate, and the antenna elements 413 and 414 are configured including the left earphone unit 411 or the right earphone unit 412. Alternatively, as shown in FIG. 4, the left earphone unit 411 or the right earphone unit 412 may be configured with a line made of an antenna element formed in a spiral shape.

  In the headphone antenna device 400 of the present embodiment, a dipole antenna is configured by the antenna element 413 and the antenna element 414 as in the earphone antenna device 100 of the first embodiment. The antenna element 413 and the received signal received by the antenna element 414 are balanced signals, and are converted into coaxial mode (unbalanced signal) RF signals by the balanced / unbalanced converter 415. The converted RF signal is transmitted to the coaxial cable 426 and input to the TV tuner 202 of the wireless communication terminal 200 via the connector 331 to which the antenna terminal 431a and the plug terminal 431b are connected.

  That is, in the headphone antenna apparatus 400 according to the present embodiment, as with the earphone antenna apparatus 100 of the first embodiment, the antenna elements 413 and 414 and the coaxial cable 426 that transmit the received signal including the ground terminal, and the audio signal Is separated by an insulator and operates using an independent line as an electric circuit.

  For this reason, it is difficult for low-frequency to high-frequency noise transmitted by the wireless communication terminal 200 transmitted through the plug terminal 332b of the wireless communication terminal 200 to be coupled to the coaxial cable 426 constituting the antenna.

  Note that, like the headphone antenna device 401 shown in FIG. 11, a power feeding circuit 417 is provided in the left earphone support unit 441 or the right earphone support unit 442, and the antenna starts from the vicinity of the joint between the left earphone support unit 441 and the right earphone support unit 442. A configuration may be adopted in which power is supplied to the elements 413 and 414 and received. In FIG. 11, a power feeding circuit 417 is provided in the right earphone support portion 442. With this configuration, various antenna elements can be used as well as antenna elements such as a conductor line having a diameter of 1 mm or more and a plate conductor having a width of about 3 mm to 20 mm. That is, it is possible to configure an antenna that receives signals with high sensitivity while reducing the influence of the human body.

  Further, the power feeding circuit 417 may supply power to the balanced / unbalanced converter 415 in order to switch the reception bandwidth by adding a variable capacitance function using a diode. With this configuration, not only can the bandwidth be expanded, but also the power for operating the balanced / unbalanced converter 415 is supplied by a battery such as a button battery, so it is necessary to supply power from the coaxial cable 426. Disappear. For this reason, low-frequency to high-frequency noise and power supply noise transmitted from the wireless communication terminal 200 through the plug terminal 332b of the wireless communication terminal 200 are transmitted to the balanced / unbalanced converter 415 and the antenna elements 413 and 414 constituting the antenna. It becomes difficult to combine.

  Further, a reception signal amplification circuit 418 that amplifies the reception radio wave signal may be provided. The reception signal amplification circuit 418 is supplied with power from a power supply circuit 417. With this configuration, it is possible to amplify the received signal at a position away from the wireless communication terminal 200 and transmit the received signal to the wireless communication terminal 200. The influence of high-frequency noise and power supply noise can be reduced, that is, it can be amplified at a position away from the noise source of the terminal, so that the noise radiated from the main body terminal 200 to the space can be amplified without being amplified. The high frequency loss of the coaxial cable 426 can be compensated. Therefore, not only the transmission quality (reception sensitivity) and transmission efficiency of the received signal are improved, but also the coaxial cable 426 for transmission can be made thin. If the coaxial cable 426 or the like is made thin, the cable 420 used for the headphone antenna apparatus 400 can be made thin, and the convenience of carrying and carrying the headphone antenna apparatus 400 is improved.

  Further, like the headphone antenna device 401 shown in FIG. 11, the left earphone support unit 441 and the right earphone support unit 442 and the user's head, that is, below the left earphone support unit 441 and the right earphone support unit 442. A spacer 443 made of an insulating material may be formed.

  When the spacer 443 is formed between the left earphone support 441 and the right earphone support 442 and the user's head, the user's head and the antenna elements 413 and 414 of the headphone antenna device 401 are in close contact with each other. Disappears. The spacer 443 can be formed in any shape as long as it is formed so that the user's head and the left and right antenna elements 413 and 414 are not in direct contact with each other. For example, the thickness may be 1 cm or more. By providing the spacer 443 with a sufficient thickness, it is possible to enhance the user's feeling of wearing, and cables such as the audio cables 421, 422 and the coaxial cable 426 can be passed through the spacer 443. , Wiring can be put together.

  Further, since the spacer 443 is formed of an insulating material, the antenna elements 413 and 414 can be kept away from a configuration that causes radio wave interference such as a human body. Therefore, good reception characteristics can be obtained. For example, the spacer 443 is preferably formed of a dielectric material that transmits radio waves, and may be formed of, for example, vinyl or styrene resin.

  For example, when the spacer 443 is configured as described above with a thickness of about 2 cm, the receiving sensitivity of the antenna elements 413 and 414 is improved by 2 dB.

  In order to make it easy for the user to wear the headphone antenna device 400, for example, as shown in FIG. 12, a structure in which the head antenna antenna 400 is hung from both ears of the user to the back of the neck / back of the head may be employed. In the case where a terminal device such as a portable TV is used as the wireless communication terminal 200 as in the present embodiment, the user is inclined to look forward to the display 201 of the wireless communication terminal 200. There are many cases. When taking such a posture, the headphone antenna device 400 is likely to fall off the ear due to the weight of the headphone antenna device 400, and thus a hook that can be held on the ear may be formed.

  With this configuration, a space can be secured around the headphone antenna device 400 in the rear portion 460 (space portion) of the headphone antenna device 400.

  That is, a space part is formed between the left and right earphone support parts 441 and 442 and the length adjustment part 444 of the support part.

  Moreover, since the site | part in which the headphone antenna apparatus 400 touches a user can be decreased if comprised in this way, the antenna elements 413 and 414 can be kept away from the structure which becomes radio wave disturbances, such as a human body. Therefore, good reception characteristics can be obtained.

  Further, in the configuration shown in FIG. 12, since the user enters between the wireless communication terminal 200 and the headphone antenna device 400, noise generated in the wireless communication terminal 200 is absorbed by the user's body. Therefore, the headphone antenna device 400 is configured to be less susceptible to noise from the wireless communication terminal 200.

  In addition, giving priority to ease of use, as shown in FIG. 13, it may be structured to hang in an arch shape from both ears to the front neck portion and the jaw portion.

[Embodiment 3]
Another embodiment of the present invention will be described below with reference to FIG.

  Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the present embodiment, after the ground lines of the audio cables 121 and 122 described in the first embodiment form a common ground line, the coaxial cable 126 is connected via an inductor (high-frequency choke) 516 that suppresses transmission of a high-frequency signal. It is the structure connected to the grounding line 125.

  In the earphone antenna device 500 configured as described above, the ground line is configured to be shared by a circuit that transmits an audio signal and a circuit that transmits a reception signal. For this reason, it is necessary to separate the high frequency circuit (reception circuit) from the low frequency circuit (audio signal) using the inductor 516 as described above.

  However, in the configuration of the present embodiment, the audio cables 121, 122, and 523 transmit audio signals up to several tens of kHz, and the frequency at which the antenna elements 113 and 114 and the coaxial cable 126 that constitute the antenna are transmitted is 100 MHz. The above high-frequency signal is transmitted. Therefore, it is possible to remove high-frequency noise that is transmitted through the audio cables 121, 122, and 523 and that causes noise in the circuit constituting the antenna, relatively easily by the inductor 516.

  In general, as a circuit of the radio communication terminal 200, the ground line of the audio cable and the ground line of the antenna are often shared. By configuring the earphone antenna device 500 as described above, the ground line of the wireless communication terminal 200 can be shared by the audio cable and the antenna as in the past, so that the wiring of the circuit board of the wireless communication terminal 200 is remarkably easy. It becomes.

  In addition, the plug terminal of the earphone antenna device 500 in the configuration of the present embodiment is provided with a ground terminal 551 that wraps the tripolar plug coaxially with a tripolar plug for stereo earphones that has been widely used conventionally. In addition, a configuration like the four-pole terminal 550 can be adopted.

  By configuring as described above, the terminals of 552 and 553 used as the left and right signal lines of audio and the terminal of 554 used as the signal path of the antenna signal constitute the above three-pole terminal, and the ground terminal A ground line that shares the ground line of the audio signal and the ground line of the antenna can be connected to 551. Further, by configuring as described above, the earphone antenna device 500 sharing the ground line of the audio signal and the ground line of the antenna can be connected to the radio communication terminal 200 using the four-pole terminal 550.

  Note that the polarity of the pin of the 4-pole terminal 550 is not limited to the above-mentioned connection. For example, a 3-pole terminal is configured by the polarity used in the conventional stereo earphone, and the antenna signal path is connected to the ground terminal 551. You may connect.

  Further, as the connection terminal, a multi-pin connector 333 as shown in FIG. 5 may be used, or the antenna terminal 331a and the earphone terminal 332a may be separately configured as shown in FIG.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

  The present invention can be applied to a line in which a signal line for reception is laid together with a low-frequency signal line. In particular, the present invention can be applied to a dipole antenna device having a line on which an antenna and an audio cable are laid, an earphone antenna device, a wireless communication terminal connected to the device, and the like.

  Therefore, the present invention can be used not only in the field of manufacturing various antenna devices such as earphone antenna devices and dipole antenna devices and parts thereof, but also various wireless communication modules and wireless communication terminals including the antenna device. It can be applied to a wide range of fields.

It is a pictorial view illustrating one embodiment according to the reference of the earphone antenna device of the present invention. It is a sketch which shows one Embodiment which concerns on the reference of the earphone antenna apparatus and wireless communication terminal in this invention. Is a pictorial view showing an another embodiment according to the reference of the earphone antenna device and a radio communication terminal in the present invention, is a pictorial view of the wireless communication terminal of the wireless communication module 2 is detachably attached. It is a sketch which shows another embodiment which concerns on the reference of the earphone antenna apparatus in this invention, and is a sketch which shows another shape of the earphone part of the earphone antenna apparatus of FIG. It is a sketch showing another embodiment according to the reference of the earphone antenna device in the present invention, and is a modification of the connector portion of the earphone antenna device of FIG. It is a sketch showing another embodiment according to the reference of the earphone antenna device in the present invention, and is a modified example of a portion holding the earphone antenna device of FIG. It is a sketch showing another embodiment according to the reference of the earphone antenna device in the present invention, and is another modified example of a portion holding the earphone antenna device of FIG. It is a sketch showing another embodiment according to the reference of the earphone antenna device in the present invention, and is a modification of the antenna element connection method of FIG. It is a sketch which shows one Embodiment concerning the reference of the antenna apparatus in this invention. It is a sketch showing an embodiment of a headphone antenna device according to the present invention. It is a sketch which shows another one Embodiment of the headphone antenna apparatus in this invention. It is a sketch which shows one Embodiment of the headphone antenna apparatus in this invention, and is a sketch which shows the usage method of the headphone antenna apparatus of this invention. It is a sketch which shows another one Embodiment of the headphone antenna apparatus in this invention, and is a sketch which shows a mode that the headphone antenna apparatus hung in the user's back in FIG. 12 is used in front of a user. It is a sketch showing another embodiment of the earphone antenna device according to the present invention, and is a modification of the connection method for sharing the ground line of the antenna of FIG. 1 and the ground line of the audio cable. It is a sketch showing a conventional earphone antenna device.

DESCRIPTION OF SYMBOLS 100 Earphone antenna apparatus 100a Earphone antenna apparatus 100b Earphone antenna apparatus 100b 'Earphone antenna apparatus 100c Earphone antenna apparatus 101 Antenna apparatus (dipole antenna apparatus)
111 Earphone unit 112 Earphone unit 113 Antenna element 114 Antenna element 115 Balance / unbalance converter (balance / unbalance converter, balun)
120 cable 121 audio cable (earphone cable)
122 Audio cable (earphone cable)
123 Audio cable (Audio common cable)
124 signal line 125 ground line 126 coaxial cable (antenna coaxial cable)
140 Insulation part (insulation coating)
141 Insulation part (insulation coating)
200 Wireless communication terminal (terminal equipment)
200 'terminal device 203 wireless communication module 331 connector (connection terminal)
331a Antenna terminal (connection terminal)
331b Plug terminal (connection terminal)
332 connector (connection terminal)
332a Earphone terminal (connection terminal)
332b Plug terminal (connection terminal)
333 Multi-pin connector (connection terminal, multi-polar connector)
400 Headphone antenna device (earphone antenna device)
401 Headphone antenna device (earphone antenna device)
411 Earphone unit 412 Earphone unit 413 Antenna element 414 Antenna element 415 Balance / unbalance converter (balance / unbalance converter, balun)
417 Power supply circuit (power supply means)
418 Reception signal amplification circuit (reception signal amplification means)
420 Cable 421 Audio cable (earphone cable)
422 Audio cable (earphone cable)
423 Audio cable (Audio common cable)
424 Signal line 425 Ground line 426 Coaxial cable (antenna coaxial cable)
441 Left earphone support (support)
442 Right earphone support (support)
443 Spacer 444 Length adjustment unit 460 Rear portion 500 Earphone antenna device 516 Inductor (high-frequency choke coil)
523 Audio cable (Audio common cable)
550 4-pole terminal (connection terminal, multipolar connector)

Claims (5)

It is an earphone antenna device that can be connected to a terminal device having a wireless communication function and is integrated with an earphone device and an antenna device,
An earphone cable connected to each of the pair of left and right earphone units and supplying an audio signal to the earphone unit;
A voice common cable having one end connected to the terminal device and the other end connected to the two earphone cables;
Furthermore, a pair of string-like antenna elements provided in a state of being insulated from each earphone cable and being integrated with the earphone cable,
A state in which one end is connected to the terminal device, the other end is connected to the pair of antenna elements, is insulated from the voice common cable, and is integrated with the voice common cable. and an antenna coaxial cable provided with,
The earphone cable includes a signal line and a ground line,
An earphone antenna characterized by sharing a grounding line for an antenna element and a grounding line for an earphone unit by connecting the grounding line of the earphone cable to the grounding line of the antenna coaxial cable via a high-frequency choke coil apparatus. An earphone antenna device in which an earphone device and an antenna device, each of which is connected to a terminal device having a wireless communication function and is connected to the left and right of the support portion, are integrated,
An earphone cable connected to each of the earphone units and supplying an audio signal to the earphone unit;
A voice common cable having one end connected to the terminal device and the other end connected to the two earphone cables;
Further, a pair of antenna elements provided along the left and right earphone parts from the center part of the support part in a state of being insulated from each earphone cable and along the support part,
A state in which one end is connected to the terminal device, the other end is connected to the pair of antenna elements, is insulated from the voice common cable, and is integrated with the voice common cable. and an antenna coaxial cable provided with,
The earphone cable includes a signal line and a ground line,
An earphone antenna characterized by sharing a grounding line for an antenna element and a grounding line for an earphone unit by connecting the grounding line of the earphone cable to the grounding line of the antenna coaxial cable via a high-frequency choke coil apparatus. An earphone antenna device in which an earphone device and an antenna device, each of which is connected to a terminal device having a wireless communication function and is connected to the left and right of the support portion, are integrated,
An earphone cable connected to each of the earphone units and supplying an audio signal to the earphone unit;
A voice common cable having one end connected to the terminal device and the other end connected to the two earphone cables;
Further, a pair of antenna elements provided along the left and right earphone parts from the center part of the support part in a state of being insulated from each earphone cable and along the support part,
A state in which one end is connected to the terminal device, the other end is connected to the pair of antenna elements, is insulated from the voice common cable, and is integrated with the voice common cable. and an antenna coaxial cable provided with,
The antenna coaxial cable includes a signal line and a ground line,
At least one of these lines is connected directly or indirectly to at least one of the antenna elements,
Furthermore, it comprises power supply means and received signal amplification means,
The power supply means supplies power to the reception signal amplification means;
The earphone antenna apparatus , wherein the reception signal amplifying unit amplifies the reception signals input from a pair of antenna elements and outputs the amplified signals to the unbalanced terminals of the unbalanced / balanced converter . Wireless communication terminal comprising the earphone antenna equipment according to any one of claims 1-3. The wireless communication terminal according to claim 4 , wherein the wireless communication terminal is portable.

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