JP4186765B2 - Earphone integrated antenna and portable wireless electronic device - Google Patents

Description

  The present invention is, for example, an earphone-integrated antenna that is used over a user's neck to receive television broadcasts and the like in various frequency bands in a good state, a portable television receiver and an information terminal device including the antenna, and the like. The present invention relates to a portable wireless electronic device.

  A wireless electronic device, for example, a television receiver (hereinafter abbreviated as a television receiver) receives a television broadcast transmitted from a broadcasting station by an antenna, broadcasts an image on a monitor, and outputs an audio signal from a speaker. Output. The TV receiver is currently provided in Japan with a 90 MHz to 108 MHz band (1ch to 3ch) and a 170 MHz to 222 MHz band (4ch to 12ch) VHF (Very High Frequency) broadcast radio wave and a 470 MHz to 770 MHz band (13ch to 62ch). UHF (Ultra High Frequency) broadcast radio waves are received by an antenna.

  For example, in a portable liquid crystal television receiver, a rod antenna housed in a casing so as to be freely drawn out is used as an antenna. However, in such a liquid crystal television receiver, since the rod antenna cannot obtain a high sensitivity characteristic with respect to a horizontally polarized television broadcast radio wave, a countermeasure such as a long axis or a booster is provided. Therefore, the liquid crystal television receiver has problems that it is unusable and enlarges the entire apparatus.

  On the other hand, in the conventional television receiver, in order to solve the above-described problem of the rod antenna, for example, an audio signal or an acoustic signal (collectively referred to as an audio signal in this specification) is connected to the receiver body. There has also been proposed an antenna having diversity characteristics using two reproduced earphone cords (see, for example, Patent Document 1). Also, a conventional television receiver has been proposed in which an antenna is configured by combining an earphone cord and an external antenna (see, for example, Patent Document 2).

  However, these television receivers also have a problem that, for example, a ghost is generated in a color broadcast received image due to the low antenna efficiency and the directivity of the earphone cord antenna, resulting in poor display image quality. In addition, the television receiver has a problem that reception characteristics become unstable due to the influence of the human body because the earphone cord antenna is used by fitting the earphone into the ear hole. Furthermore, the TV receiver has a problem that it is difficult to obtain satisfactory reception characteristics although the earphone cord antenna must receive radio waves in a wide band of VHF broadcast and UHF broadcast.

  For example, in Patent Document 3, the above-described problem of the earphone cord antenna is solved to have a good reception characteristic for a wide-band radio wave, and the characteristic change due to a change in inductance or capacitance due to the influence of the human body is suppressed and stabilized. A loop antenna is disclosed in which reception characteristics are obtained. However, since such a loop antenna is also configured separately from the earphone, an antenna cord configured separately from the earphone cord is required, and there is a problem that the structure becomes complicated.

Japanese Patent Laid-Open No. 7-7441 JP 7-307694 A JP-A-10-84209

  By the way, with regard to television broadcasting, there is a trend to unify the UHF band from the above-described VHF band and UHF band to the UHF band through the implementation of digital terrestrial broadcasting. For this reason, in a television receiver, the antenna only has to receive a broadcast wave in a relatively narrow band, and the reception band can be narrowed. However, the television receiver is provided with an antenna that can obtain the high-quality received image by solving the above-described various problems in the rod antenna and the earphone cord antenna even when the reception band is narrowed. It has not reached.

  Accordingly, the present invention has been proposed for the purpose of providing an earphone-integrated antenna suitable for use in a portable television receiver or the like that suppresses the influence of the human body and stably receives broadband broadcast waves and the like. It is. In addition, the present invention has been proposed for the purpose of providing a portable wireless electronic device provided with such an earphone-integrated antenna so as to obtain a high-quality received image.

  An earphone-integrated antenna according to the present invention that achieves the above-described object includes a balun that converts impedance from a balanced transmission mode to an unbalanced transmission mode, a first loop antenna line, a second loop antenna line, and a first audio signal transmission line. And a second audio signal transmission line, a first earphone line and a second earphone line, a first ground line and a second ground line, a first earphone and a second earphone, and attached to a portable wireless electronic device. Thus, radio waves in different frequency bands are received by the first loop antenna line and the second loop antenna line.

  The first loop antenna line is connected at both ends to a terminal on the balanced transmission mode side of the balun and has resonance characteristics with respect to radio waves in the first frequency band. The second loop antenna line is connected at both ends to the balanced transmission mode side terminal of the balun, has resonance characteristics with respect to radio waves in the second frequency band lower than the radio waves in the first frequency band, and has a wavelength due to inductance loading. The length is shortened so that the line length is substantially the same as that of the first loop antenna line. Each of the first audio signal transmission line and the second audio signal transmission line is connected to the audio signal output source at one end side, and the first audio signal cutoff element or the second audio signal cutoff element is connected to the balun at the other end side. Are connected to either one of the first loop antenna line or the second loop antenna line connected via the first high-frequency signal blocking element or the second high-frequency signal blocking element, An audio signal is supplied to each one of the loop antenna lines. The first earphone line and the second earphone line are branched via a third high-frequency signal cutoff element or a fourth high-frequency signal cutoff element at a predetermined length position from the connection portion with the balun with respect to each one of the loop antenna lines. The first earphone or the second earphone is connected to the other loop antenna line via the fifth high-frequency signal cutoff element or the sixth high-frequency signal cutoff element. The first ground line and the second ground line are respectively branched from the other loop antenna line, and are respectively connected to the balanced transmission mode side terminal of the balun via the seventh high frequency signal cutoff element and the eighth high frequency signal cutoff element, respectively. Connected to ground.

  In the earphone integrated antenna according to the present invention configured as described above, radio waves in the first frequency band are received by the first loop antenna line, and radio waves in the second frequency band are received by the second loop antenna line. . In the earphone-integrated antenna, these received radio waves are input to the balanced transmission mode side of the balun, impedance conversion is performed, and transmitted to the high-frequency signal processing unit via, for example, a coaxial cable connected to the unbalanced transmission mode side. To do. In the earphone-integrated antenna, the high-frequency signal transmitted through the first loop antenna line and the second loop antenna line is converted into the first audio signal transmission line and the second audio signal transmission line or the first earphone line by each high-frequency signal blocking element. In addition, entry to the second earphone track or the ground track is prevented.

  In the earphone integrated antenna, audio signals supplied from the audio signal output source to the first audio signal transmission line, the second audio signal transmission line, and the ground line are respectively transmitted to the first loop antenna line or the second loop antenna line. Supplied and transmitted. In the earphone-integrated antenna, the audio signal is transmitted to the first earphone line or the second earphone line branched from the first loop antenna line or the second loop antenna line via the respective audio signal separation elements. Output from the first earphone or the second earphone. In the earphone integrated antenna, the first loop antenna line and the second loop antenna line are connected to the connection portion between the first audio signal transmission line and the second audio signal transmission line and the first earphone line or the second earphone line. An audio signal transmission line is formed together with a high-frequency signal transmission line between the first ground line or the branch part with the second ground line via the branch / connector.

  The portable wireless electronic device according to the present invention that achieves the above-described object includes an earphone-integrated antenna unit, a coaxial cable that is connected to an unbalanced transmission mode side terminal of a balun, and transmits a high-frequency signal. Is composed of a device main body unit to be connected. In portable wireless electronic devices, the antenna unit connected to the device main unit via a coaxial cable is attached to a suspension belt or head that hangs the device main unit from the user's neck and listens to audio output from the earphone. Also used as a strap. In the portable wireless electronic device, the antenna unit has a balun for impedance conversion from a balanced transmission mode to an unbalanced transmission mode, a first loop antenna line, a second loop antenna line, a first audio signal transmission line, and a second audio signal. A transmission line; a first earphone line; a second earphone line; a first ground line; a second ground line; a first earphone and a second earphone; and a first loop antenna line and a second loop antenna line. Receive radio waves in different frequency bands.

  The portable wireless electronic device displays and outputs a video based on a video signal output from the signal processing unit, a signal processing unit that processes a high-frequency signal, and a receiving circuit unit that is connected to a coaxial cable at least. And a sound signal output unit that outputs the sound signal output from the signal processing unit to the first sound signal transmission line and the second sound signal transmission line.

  The antenna unit has a resonance characteristic for radio waves in the first frequency band with the first loop antenna line connected to the balanced transmission mode side terminal of the balun, and the second loop antenna line is on the balanced transmission mode side of the balun. Both ends are connected to the terminal, have resonance characteristics with respect to radio waves in the second frequency band lower than the first frequency band, and have the same length as the first loop antenna line by shortening the wavelength by inductance loading. It is assumed that the track length. The antenna unit includes a first audio signal transmission line and a second audio signal transmission line, one end side of which is connected to the audio signal output source and the other end side with respect to the balun. The first high-frequency signal blocking element or the second high-frequency signal blocking element is connected to either the first loop antenna line or the second loop antenna line connected via the signal blocking element, respectively. An audio signal is supplied to each one of the loop antenna lines. The antenna unit includes a third high-frequency signal blocking element or a fourth high-frequency signal blocking element at a predetermined length position from the connection part of the first earphone line and the second earphone line to the balun with respect to each one of the loop antenna lines. Is connected to the first earphone or the second earphone, and is connected to the other loop antenna line from the earphone via the fifth high-frequency signal cutoff element or the sixth high-frequency signal cutoff element. . In the antenna unit, the first ground line and the second ground line are respectively branched from the other loop antenna line and in the vicinity of the terminal on the balanced transmission mode side of the balun, respectively, the seventh high-frequency signal cutoff element or the eighth high-frequency signal cutoff It is connected to the ground through the element.

  In the portable wireless electronic device according to the present invention configured as described above, the radio wave of the first frequency band is received by the first loop antenna line of the antenna unit, and the second frequency band is received by the second loop antenna line. Receive radio waves. In portable wireless electronic devices, these received radio waves are input to the balanced transmission mode side of the balun of the antenna unit, impedance conversion is performed, and the device main body unit is connected via a coaxial cable connected to the unbalanced transmission mode side. Is transmitted. In the portable wireless electronic device, the received radio wave transmitted through the first loop antenna line and the second loop antenna line is converted into a first audio signal transmission line, a second audio signal transmission line, and a first earphone by each high-frequency signal cutoff element. The line and the second earphone line or the first ground line and the second ground line are prevented from entering.

  In portable wireless electronic devices, signal processing of received radio waves is performed in the device main body, and an image is displayed on the monitor based on the video signal output from the signal processing unit and the first audio signal transmission of the antenna unit Audio signals are output to the line, the second audio signal transmission line, the first ground line, and the second ground line, and supplied to the first loop antenna line and the second loop antenna line. In the portable wireless electronic device, the audio signal is separated from the first loop antenna line and the second loop antenna line into the first earphone line and the second earphone line via the audio signal separation element, respectively. And the second earphone. In the portable wireless electronic device, high-frequency noise from the first and second earphones is prevented from entering the first loop antenna line and the second loop antenna line by the high-frequency signal blocking elements.

  According to the earphone-integrated antenna according to the present invention configured as described above, the first loop antenna line and the second loop antenna line having resonance characteristics with respect to radio waves in different frequency bands are partially voiced. By integrating the radio wave receiving function and the earphone line function together with functioning as a signal transmission line, the wireless device body can be miniaturized and improved in usability. According to the earphone-integrated antenna, radio waves of different frequency bands are received by the first loop antenna line and the second loop antenna line having high antenna characteristics, respectively, so that radio waves with high characteristics are received. According to the earphone integrated antenna, the first loop antenna line and the second loop antenna line are separated from each other in the high frequency signal region with respect to the first earphone and the second earphone that are directly attached to the human body. As a result, the influence of high-frequency signal noise from the human body side is reduced, and stable antenna characteristics can be obtained. In addition, according to the earphone integrated antenna, since the first loop antenna line and the second loop antenna line receive radio waves at positions separated from the apparatus main body, there is an influence of high-frequency signal noise from the apparatus main body side. As a result, stable antenna characteristics can be obtained.

  Further, according to the portable wireless electronic device according to the present invention configured as described above, the first loop antenna line and the second loop antenna line having resonance characteristics with respect to radio waves in different frequency bands are used for transmission of audio signals. By having the antenna unit that combines the radio wave receiving function and the line function of the earphone together with the line, the miniaturization and the usability can be improved. According to the portable wireless electronic device, radio waves of different frequency bands are received by the antenna unit through the first loop antenna line and the second loop antenna line having high antenna characteristics, so that high characteristic radio wave reception is performed. . According to the portable wireless electronic device, the first loop antenna line and the second loop antenna line of the antenna unit are separated in the high frequency signal region from the first earphone and the second earphone that are directly attached to the human body. Therefore, the influence of high frequency signal noise from the human body side is reduced, and stable antenna characteristics can be obtained. According to the portable wireless electronic device, since the radio wave is received at a position where the first loop antenna line and the second loop antenna line of the antenna unit are separated from the device main body, high frequency signal noise from the device main body side is received. The influence is reduced and stable antenna characteristics can be obtained.

  Hereinafter, a portable liquid crystal television receiver (hereinafter simply referred to as a liquid crystal television) 1 shown in the drawings as an embodiment of the present invention will be described in detail. As shown in FIG. 1, the liquid crystal television 1 includes a device main body 2, a coaxial cable 3 connected to the device main body 2 at one end, a matching box 4 connected to the other end of the coaxial cable 3, The loop antenna part which has the 1st loop antenna track | line 6 and the 2nd loop antenna track | line 7 which mention the detail pulled out from the matching box 4 via the guide holder 5 later, and comprises the strap hung on the neck of the user P 8 is provided. The liquid crystal television 1 includes a pair of left and right first audio signal separation boxes 9 and second audio signal separation boxes 10 provided at predetermined length positions from the matching box 4 in the loop antenna unit 8, and these first audio signal separation boxes. 9 and the second audio signal separation box 10, respectively, a first earphone line 11 and a second earphone line 12 drawn out in a loop, and a first earphone 13 provided on the first earphone line 11 and the second earphone line 12, and A second earphone 14 is provided.

  The liquid crystal television 1 receives each channel radio wave of the VHF broadcast and each channel radio wave of the UHF broadcast by the loop antenna unit 8, displays the video of the received broadcast on the liquid crystal monitor 15 provided in the device main body 2, and outputs an audio signal or an acoustic signal. Etc. (hereinafter collectively referred to as audio signals) are reproduced and output from the first earphone 13 and the second earphone 14. The liquid crystal television 1 has a rechargeable battery built in the device main body 2 and is used in a portable manner. The liquid crystal television 1 is turned on / off by an operation unit 16 that omits details provided on the housing of the device main body 2. Operation, channel switching operation, volume adjustment operation, etc. are performed. The liquid crystal television 1 is configured to perform function switching or the like by appropriately selecting an icon or the like displayed on the screen of the liquid crystal monitor 15 although details are omitted.

  As shown in FIG. 2, the liquid crystal television 1 has an input / output switching circuit unit 17 that receives a high-frequency signal received by, for example, the loop antenna unit 8 and outputs an audio signal. A tuner circuit unit 18 that receives a high frequency signal from the input / output switching circuit unit 17 and selects a predetermined channel set by the operation unit 16 and converts it into an intermediate frequency signal, and an intermediate frequency output from the tuner circuit unit 18 And a signal processing circuit unit 19 that processes the signal and outputs a video signal and an audio signal. Note that the liquid crystal television 1 processes the two types of received radio waves with a tuning circuit because the loop antenna unit 8 has reception characteristics for two types of radio waves as will be described in detail later.

  The liquid crystal television 1 includes a liquid crystal driving circuit unit 20 to which a video signal output from the signal processing circuit unit 19 is input in the device main body 2, and a driving signal based on the video signal output from the liquid crystal driving circuit unit 20. As a result, the liquid crystal monitor 15 is driven to perform a predetermined video display. The liquid crystal television 1 is provided with an audio signal amplification circuit unit 21 to which an audio signal output from the signal processing circuit unit 19 is input in the apparatus main body 2, and an audio signal output from the audio signal amplification circuit unit 21 is input. The signal is output to the loop antenna unit 8 via the output switching circuit unit 17.

  In the liquid crystal television 1, an audio signal is supplied to the matching box 4 via the coaxial cable 3, and is supplied to the first loop antenna line 6 or the second loop antenna line 7 of the loop antenna unit 8 in the matching box 4. And transmitted. In the liquid crystal television 1, the audio signal is transmitted from the first loop antenna line 6 or the second loop antenna line 7 to the first audio signal separation box 9 and the second audio signal separation box 10 in the first earphone line 11 and the second earphone line. 12 is supplied to the first earphone 13 and the second earphone 14 and reproduced and output. In the liquid crystal television 1, a left audio signal is output from the first earphone 13 and a right audio signal is output from the second earphone 14.

  It should be noted that the liquid crystal television 1 is provided with various circuit configurations provided in the conventional liquid crystal television as well as the basic configuration circuit described above. The liquid crystal television 1 not only receives broadcast radio waves, but also includes a large capacity information storage means such as a hard disk, for example, so as to store various types of information and, if necessary, the liquid crystal monitor 14, the first earphone 13 and the second earphone. You may make it output from the earphone 14. FIG. The liquid crystal television 1 includes a power source unit that can be connected to an external power source such as a commercial power source or a car battery together with a secondary battery, and power is supplied to each unit from the power source unit.

  In the liquid crystal television 1, the loop antenna portion 8 is connected to the device main body 2 via the coaxial cable 3 as described above. As the coaxial cable 3, for example, a cable having a line impedance of 75Ω and a line length of about 700 mm which is convenient for the user P to use the distance between the device main body 2 and the loop antenna unit 8 is used. As shown in FIG. 3, the coaxial cable 3 includes a high-frequency signal line 22 that transmits a radio wave (high-frequency signal) received by the loop antenna unit 8 to the device main body 2 side and inputs it to the input / output switching circuit 17, and an input / output switching circuit. The first audio signal line 23 for transmitting the left audio signal and the second audio signal signal line 24 for transmitting the right audio signal, which supply the audio signal output from 17 to the matching box 4, and the ground line 25 are coaxial. It consists of a multicore cable.

  The liquid crystal television 1 can use the coaxial cable 3 to connect the device main body 2 and the loop antenna unit 8 with the minimum number of cables, thereby reducing the size, weight, cost, or handling. Become figured. In addition, since the liquid crystal television 1 has a slightly increased hardness due to the increase in the number of cores, the high-frequency signal line 22, the ground line 25, and the audio signal signal lines 23 and 24 are provided as separate cables as necessary. Of course, the main body 2 and the loop antenna unit 8 may be connected.

  As shown in FIG. 3, the coaxial cable 3 is drawn from the device body 2, and the other end of the high-frequency signal line 22 is mounted on a circuit board 26 provided in the matching box 4. Connected to the side. In the coaxial cable 3, the first audio signal line 23 is connected to the first audio signal pattern 28 formed on the circuit board 26, and the second audio signal line 24 is connected to the second audio signal pattern 29. The coaxial cable 3 is connected to a ground pattern 30 in which a ground line 25 is formed on a circuit board 26 with a large area.

  The balun 27 converts the balanced transmission mode on the loop antenna unit 8 side to the unbalanced transmission mode on the coaxial cable 3 side and has an impedance matching effect. Specifically, the balun 27 performs impedance conversion from a balanced transmission mode having a line impedance of 200Ω to an unbalanced transmission mode having a line impedance of 75Ω. The balun 27 has a ground terminal connected to the ground pattern 30 of the circuit board 26.

  The circuit board 26 has a first terminal land 31 and a second terminal land 32 to which the balanced transmission mode side terminal of the balun 27 is connected, and a first audio for each of the first terminal land 31 and the second terminal land 32. A third terminal land 35 and a fourth terminal land 36 connected through the signal blocking element 33 and the second audio signal blocking element 34 are formed. The circuit board 26 is connected to the third terminal land 35 and the fourth terminal land 36 via the first high-frequency signal blocking element 37 and the second high-frequency signal blocking element 38, respectively. 28 and the second audio signal pattern 29 are formed. A first terminal land 31 and a second terminal land 32 are connected to the circuit board 26 via a seventh high-frequency signal cutoff element 39a and an eighth high-frequency signal cutoff element 39b, respectively, and a ground terminal of the balun 27 is connected. A ground pattern 30 is formed.

  The first audio signal pattern 28 and the second audio signal pattern 29 are respectively a first audio signal transmission line 40 and a second audio signal transmission line 41 for transmitting an audio signal supplied from the device body 2 side via the coaxial cable 3. Configure. As described above, the first terminal land 31 and the second terminal land 32 are connected to the ground pattern 30 via the seventh high-frequency signal cutoff element 39a and the eighth high-frequency signal cutoff element 39b, respectively. Thus, the first ground line 42a and the second ground line 42b for transmitting the audio signal are configured.

  The loop antenna unit 8 is drawn out in a loop shape in a state where the first loop antenna line 6 and the second loop antenna line 7 are held from the matching box 4 by the guide holder 5 at an angle of about 90 °. The loop antenna unit 8 is connected to the first earphone line 11 and the second earphone line 11 via the first audio signal separation box 9 and the second audio signal separation box 10 from the middle of the first loop antenna line 6 and the second loop antenna line 7. The earphone track 12 is branched off.

  As shown in FIGS. 3 and 4, the first loop antenna line 6 is connected to the first terminal land 31 of the circuit board 26 at one end 6 a and pulled out from the matching box 4. The second audio signal separation box 10 is drawn into the matching box 4, and the other end 6 b is connected to the second terminal land 32 of the circuit board 26. The first loop antenna line 6 has both ends 6a and 6b on the circuit board 26 via the seventh high-frequency signal cutoff element 39a and the eighth high-frequency signal cutoff element 39, in other words, the first ground line 42a and Connected to the second ground line 42b.

  As shown in FIGS. 3 and 4, the second loop antenna line 7 is connected to the third terminal land 35 of the circuit board 26 at one end 7 a and pulled out from the matching box 4. The second audio signal separation box 10 is pulled into the matching box 4 and the other end 7 b is connected to the fourth terminal land 36 of the circuit board 26. The second loop antenna line 7 is connected to the balanced transmission mode side terminal of the balun 27 via the first audio signal signal blocking element 33 and the first terminal land 31 on the one end 7 a side. The second loop antenna line 7 is connected to the first audio signal transmission line 40 via the first high-frequency signal blocking element 37 on the one end 7a side. Furthermore, the second loop antenna line 7 is connected to the second audio signal transmission line 41 via the second high-frequency signal cutoff element 38 on the other end 7b side.

  The first loop antenna line 6 and the second loop antenna line 7 are high-frequency signal transmission lines between the matching box 4 and the first audio signal separation box 9 and the second audio signal separation box 10 as will be described in detail later. At the same time, a transmission line and a ground line for audio signals supplied from the device body 2 side are configured. That is, the first loop antenna line 6 constitutes a first combined transmission line 43 that also serves as a left audio signal ground line together with a high-frequency signal transmission line between the matching box 4 and the first audio signal separation box 9. To do. In addition, the first loop antenna line 6 constitutes a second dual-purpose transmission line 44 that also serves as a ground line for a right audio signal together with a high-frequency signal transmission line between the matching box 4 and the second audio signal separation box 10. To do.

  Further, the second loop antenna line 7 constitutes a third combined transmission line 45 that also serves as the transmission line for the left audio signal together with the transmission line for the high frequency signal between the matching box 4 and the first audio signal separation box 9. . The second loop antenna line 7 constitutes a fourth combined transmission line 46 that also serves as a transmission line for the right audio signal together with the transmission line for the high frequency signal, between the matching box 4 and the second audio signal separation box 10.

  As the first audio signal blocking element 33 and the second audio signal blocking element 34 described above, for example, a capacitor of 10 pF, size 1608 manufactured by Taiyo / Murata Manufacturing Co., Ltd. is used. The first audio signal cut-off element 33 is configured to connect the first combined transmission line 43 of the first loop antenna line 6 and the third combined transmission line 45 of the second loop antenna line 7 to the signal line and the ground line as described above. Separately, the drive coil of the first earphone 13 is driven. The second audio signal blocking element 34 includes the signal line and the ground line as described above by connecting the second combined transmission line 44 of the first loop antenna line 6 and the fourth combined transmission line 46 of the second loop antenna line 7 as described above. The drive coil of the second earphone 14 is driven separately.

  As the first high-frequency signal blocking element 37 and the second high-frequency signal blocking element 38, for example, ferrite beads of BLM18HD102SN1 and size 1608 manufactured by Murata Manufacturing are used. The first high-frequency signal cutoff element 37 and the second high-frequency signal cutoff element 38 are each in a low impedance mode for an audio signal in a 20 KHz band and pass the audio signal, and for a high-frequency signal, 1 kΩ or more The high-impedance mode has a function of blocking this high-frequency signal.

  The first high-frequency signal blocking element 37 cuts inflow of high-frequency signal components from the second loop antenna line 7 side with respect to the first audio signal transmission line 40. Further, the second high-frequency signal cutoff element 38 also cuts inflow of high-frequency signal components from the second loop antenna line 7 side with respect to the second audio signal transmission line 41. The first high-frequency signal cutoff element 37 and the second high-frequency signal cutoff element 38 act so that a stable reception function is achieved by cutting high-frequency noise to the device body 2 side via the transmission line of the audio signal. To do.

  The seventh high frequency signal cut-off element 39a and the eighth high frequency signal cut-off element 39b are also made of the above-mentioned ferrite beads made by Murata Manufacturing Co., Ltd., and become a high impedance mode of 1 kΩ or higher for high-frequency signals, respectively. By cutting inflow of the high frequency signal to the 2 ground line 42b side, it acts so that the stable receiving function is show | played. The seventh high-frequency signal blocking element 39a and the eighth high-frequency signal blocking element 39b pass the audio signal in the 20 KHz band to the first ground line 42a or the second ground line 42b, respectively, so that the first earphone 13 and the second earphone 14 And to be driven.

  In the first loop antenna line 6 and the second loop antenna line 7, the lengths of the matching box 4, the first audio signal separation box 9, and the second audio signal separation box 10 are about 370 mm, respectively. It is pulled out from the matching box 4 through the holder 5. The guide holder 5 is made of a member formed in a Y shape with a resin material with an opening angle set to 90 °, and the one end portions 6a and 7a of the first loop antenna line 6 and the second loop antenna line 7 from one side. While pulling out, the other ends 6b and 7b are pulled out from one side. The guide holder 5 separates the first loop antenna line 6 and the second loop antenna line 7 from the matching box 4 within a predetermined length range with a drawing angle of 90 ° from each other. The loop antenna line 6 and the second loop antenna line 7 have stable reception characteristics.

  The first loop antenna line 6 and the second loop antenna line 7 are branched through the first earphone line 11 via the first audio signal separation box 9 and the second audio signal separation box 10 as described above. Thus, the second earphone line 12 is branched. The first earphone line 11 includes a signal line portion 11a branched from the second loop antenna line 7 side, a first earphone 13 connected to the signal line portion 11a, and a first earphone 13 drawn from the first earphone 13. It consists of a ground line portion 11 b connected to the loop antenna line 6. The second earphone line 12 also has a signal line portion 12a branched from the second loop antenna line 7 side, a second earphone 14 connected to the signal line portion 12a, and the first earphone 14 drawn from the second earphone 14. It consists of a ground line portion 12 b connected to the loop antenna line 6.

  As shown in FIG. 1, the first earphone track 11 and the second earphone track 12 are arranged such that the first earphone 13 is in the left ear and the second earphone 14 is in the right ear in a state where the user P is hung on the neck. In consideration of convenience, the length of the first audio signal separation box 9 and the first earphone 13 and the length of the second audio signal separation box 10 and the second earphone 14 are about 150 mm. And As shown in FIG. 1, the first earphone track 11 and the second earphone track 12 are each connected to the earphones 13 and 14 as a single line by storing the signal line portion and the ground line portion in a protective tube or the like.

  In the first audio signal separation box 9 and the second audio signal separation box 10, only the audio signal is separated from the first loop antenna line 6 and the second loop antenna line 7, respectively, and the first earphone line 11 and the second earphone line are separated. 12 to flow. In addition, the first audio signal separation box 9 and the second audio signal separation box 10 have a high frequency using the user P as a medium by mounting the first earphone 13 and the second earphone 14 in the left and right ears of the user P. A stable reception characteristic is exhibited in the loop antenna unit 8 so that noise does not flow into the first loop antenna line 6 and the second loop antenna line 7 via the first earphone line 11 and the second earphone line 12. To do.

  In the first audio signal separation box 9 and the second audio signal separation box 10, as shown in FIG. 4, the third high frequency signal blocking element 47 to the sixth high frequency signal connected to the first earphone line 11 or the second earphone line 12 are provided. A signal blocking element 50 is provided. The third high frequency signal cutoff element 47 to the sixth high frequency signal cutoff element 50 are also made of Murata ferrite beads provided in the matching box 4 described above.

  The third high-frequency signal blocking element 47 is connected between the third combined transmission line 45 of the second loop antenna line 7 and the signal line portion 11a of the first earphone line 11, and the sound from the third combined transmission line 45 side. The audio signal is passed through the signal in the low impedance mode, and the high frequency signal is blocked for the high frequency signal. Therefore, the third high-frequency signal cutoff element 47 separates the audio signal from the third combined transmission line 45 of the second loop antenna line 7 and supplies it to the first earphone line 11. In addition, the third high-frequency signal cutoff element 47 cuts inflow of high-frequency noise from the first earphone line 11 side to the second loop antenna line 7.

  The fourth high-frequency signal blocking element 48 is also connected between the fourth combined transmission line 46 of the second loop antenna line 7 and the signal line portion 12a of the second earphone line 12, and the sound from the fourth combined transmission line 46 side. The audio signal is passed through the signal in the low impedance mode, and the high frequency signal is blocked for the high frequency signal. Therefore, the fourth high-frequency signal blocking element 48 separates the audio signal from the fourth combined transmission line 46 of the second loop antenna line 7 and supplies the audio signal to the second earphone line 12. The fourth high-frequency signal cutoff element 48 cuts inflow of high-frequency noise from the second earphone line 12 side to the second loop antenna line 7.

  The fifth high-frequency signal cutoff element 49 is connected between the first loop antenna line 6 and the ground line portion 11b of the first earphone line 11, and the first dual-purpose transmission line 43 side is in a low impedance mode state with respect to the audio signal. The sound signal is allowed to pass, and the high-frequency signal is blocked in the high impedance mode. Therefore, the fifth high-frequency signal cutoff element 49 connects the ground line portion 11b of the first earphone line 11 to the first ground line 42a via the first loop antenna line 6 and an audio signal flows through the first earphone line 11. Like that. The fifth high-frequency signal cutoff element 49 cuts inflow of a high-frequency signal from the first loop antenna line 6 side with respect to the first earphone line 11. Further, the fifth high-frequency signal cutoff element 49 cuts inflow of high-frequency noise from the first earphone line 11 side to the first loop antenna line 6.

  The sixth high-frequency signal cutoff element 50 is connected between the first loop antenna line 6 and the ground line portion 12b of the second earphone line 12, and the second combined transmission line 44 side is in a low impedance mode state with respect to the audio signal. The sound signal is allowed to pass, and the high-frequency signal is blocked in the high impedance mode. Therefore, the sixth high-frequency signal cutoff element 50 connects the ground line portion 12b of the second earphone line 12 to the second ground line 42b via the first loop antenna line 6 and an audio signal flows through the second earphone line 12. Like that. In addition, the sixth high-frequency signal cutoff element 50 cuts inflow of a high-frequency signal from the first loop antenna line 6 side with respect to the second earphone line 12. Furthermore, the sixth high-frequency signal cutoff element 50 cuts inflow of high-frequency noise from the second earphone line 12 side to the first loop antenna line 6.

  As shown in FIG. 4, the first audio signal separation box 9 and the second audio signal separation box 10 include a third audio signal blocking element 51 and a fourth audio signal blocking element 52 connected to the first loop antenna line 6. And a fifth audio signal cutoff element 53 and a sixth audio signal cutoff element 54 connected to the second loop antenna line 7 are provided. The third audio signal blocking element 51 to the sixth audio signal blocking element 54 are capacitors having a capacitance of 10 pF similar to the capacitors made by Taiyo / Murata Manufacturing Co., Ltd. provided in the matching box 4 described above. The third audio signal blocking element 51 to the sixth audio signal blocking element 54 are provided between the first audio signal separation box 9 and the second audio signal separation box 10, and the first loop antenna line 6 and the second loop antenna line 7. So that no audio signal is transmitted.

  The third audio signal blocking element 51 cuts the left audio signal transmitted through the first combined transmission line 43 of the first loop antenna line 6 so as not to flow into the second combined transmission line 44 side. The fourth audio signal blocking element 52 cuts the right audio signal transmitted through the second dual-purpose transmission line 44 of the first loop antenna line 6 so as not to flow into the first dual-purpose transmission line 43 side. The fifth audio signal blocking element 53 cuts the left audio signal transmitted through the third combined transmission line 45 of the second loop antenna line 7 so as not to flow into the fourth combined transmission line 46 side. The sixth audio signal blocking element 54 cuts the right audio signal transmitted through the fourth combined transmission line 46 of the second loop antenna line 7 so as not to flow into the third combined transmission line 45 side.

  By the way, in Japan, programs of 90 MHz to 108 MHz band, 170 MHz to 222 MHz band VHF broadcast, and 470 MHz to 770 MHz band UHF broadcast are provided. A portable television or the like is equipped with an antenna having wide-area characteristics capable of receiving broadcast waves in these frequency bands in good condition, but requires an antenna length of about 1λ to 1.5λ as a loop antenna. . In a portable television or the like, for example, since the wavelength λ of a radio wave in the 100 MHz band is about 3 m, a real length loop antenna cannot be used as it is.

  The loop antenna unit 8 has resonance characteristics with respect to radio waves in different frequency bands, and the first loop antenna line 6 and the second loop antenna line 7 receive each channel radio wave of VHF broadcast and each channel radio wave of UHF broadcast. . As will be described later, the second loop antenna line 7 is loaded with an inductance to shorten the wavelength of the loop antenna part 8, so that the length of the loop antenna part 8 is substantially the same as that of the first loop antenna line 6. Configure the strap body to hang. In the loop antenna unit 8, the first loop antenna line 6 and the second loop antenna line 7 constitute a dual-purpose transmission line that transmits an audio signal together with a high-frequency signal in each partial region as described above.

  As described above, the loop antenna unit 8 is provided with the first loop antenna line 6 and the second loop antenna line 7 having resonance characteristics with respect to radio waves in different frequency bands, so that the band is widened. The loop antenna unit 8 is configured such that the first loop antenna line 6 has resonance characteristics with respect to a broadcast radio wave having a fundamental frequency of 200 MHz with an antenna length of 1λ. The loop antenna unit 8 has a second loop antenna line 7 that is loaded with inductance by the first loading coil 55 and the second loading coil 56 and shortens the wavelength. It is configured.

  The loop antenna unit 8 uses the first and second loop antenna lines 6 and 6 of the UHF broadcast band using harmonic excitation (third harmonic, fifth harmonic, and seventh harmonic) of 100 MHz and 200 MHz. 7 and receive. The loop antenna unit 8 includes a first loop antenna line 17 and a second loop antenna line 18 having a length between the first audio signal separation box 9 and the second audio signal separation box 10 of about 400 mm. The length is set so that the user P can use it by hanging it on the neck.

  The first loading coil 55 and the second loading coil 56 are connected to the second loop antenna line 7 in the first audio signal separation box 9 and the second audio signal separation box 10, respectively, as shown in FIG. The first loading coil 55 is provided in the second loop antenna line 7 so as to be located between the branch point of the first earphone line 11 and the fifth audio signal blocking element 53. The second loading coil 56 is provided in the second loop antenna line 7 so as to be located between the branch point of the second earphone line 12 and the sixth audio signal blocking element 54. The first loading coil 55 and the second loading coil 56 each have an inductance of 3 μH in the 100 MHz band.

  As described above, the loop antenna unit 8 holds the first loop antenna line 6 and the second loop antenna line 7 through the guide holder 5 at a predetermined opening angle and pulls them out from the matching box 4. Since the loop antenna unit 8 is hung on the neck of the user P between the first audio signal separation box 9 and the second audio signal separation box 10, the first loop antenna line 6 and the second loop antenna line 7 in this part. Is held so that it does not come into contact with the user P, and the user P is not uncomfortable and is mechanically protected.

  That is, the loop antenna unit 8 is formed by connecting the first loop antenna line 6 and the second loop antenna line 7 with an insulating resin material having flexibility between the first audio signal separation box 9 and the second audio signal separation box 10. It is sealed with a strap body 57 to be molded. As shown in FIG. 5, the strap body 57 is formed into a thin belt shape, and holds the first loop antenna line 6 and the second loop antenna line 7 at a predetermined facing distance that can improve the characteristics of each other.

  In the liquid crystal television 1 configured as described above, the first earphone line 11 branched from the first audio signal separation box 9 and the second audio signal separation box 10 while the user P hangs the strap body 57 on the neck. The second earphone track 12 is extended and the first earphone 13 and the second earphone 14 are respectively attached to the left and right ears as described above. In the liquid crystal television 1, as shown in FIG. 1, the device main body 2 is suspended from the strap body 57 via the coaxial cable 3 and positioned in front of the chest.

  In the liquid crystal television 1, a television broadcast radio wave is received by the loop antenna unit 8, and the received radio wave is transmitted to the device main body 2 via the coaxial cable 3. In the liquid crystal television 1, as described above, the loop antenna unit 8 includes the first loop antenna line 6 that resonates with the fundamental frequency of the 200 MHz band and the second loop antenna line 7 that resonates with the fundamental frequency of the 100 MHz band. . Therefore, the liquid crystal television 1 efficiently receives broadcast waves in a wide band from VHF broadcast to UHF broadcast.

  In the liquid crystal television 1, the received radio wave received by the loop antenna unit 8 is input from the first loop antenna line 6 or the second loop antenna line 7 to the device main body 2 via the balun 27 and the coaxial cable 3, and predetermined in each unit. Signal processing is performed. In the liquid crystal television 1, a power-on operation, a tuning operation, a volume operation, or the like is performed by the operation unit 16 of the device main body 2, an image is displayed on the liquid crystal monitor 15, and the first earphone 13 and the second earphone 14 are used. Right and left audio signals are reproduced and output.

  In the liquid crystal television 1, the audio signal output from the input / output switching circuit unit 17 of the device body 2 is sent to the first audio signal transmission line 40 and the second audio signal transmission line 41 of the loop antenna unit 8 through the coaxial cable 3. And supplied respectively. In the liquid crystal television 1, the left audio signal in the loop antenna unit 8 is the first audio signal transmission line 40 -the first high-frequency signal cutoff element 37 -the third terminal land 35 -the second loop antenna line 7 (the third combined transmission). Line 45) -first audio signal separation box 9 (third high-frequency signal blocking element 47) -first earphone line 11 (signal line part 11a) -first earphone 13-first earphone line 11 (ground line part 11b)- First audio signal separation box 9 (fifth high frequency signal blocking element 49) -first loop antenna line 6 (first combined transmission line 43) -first ground line 42a-seventh high frequency signal blocking element 39a-ground pattern 30 The first earphone 13 is driven and output by the loop.

  Further, in the liquid crystal television 1, the right audio signal is, in the loop antenna unit 8, the second audio signal transmission line 41 -the second high-frequency signal blocking element 38 -the fourth terminal land 36 -the second loop antenna line 7 (fourth). Dual-purpose transmission line 46) -second audio signal separation box 10 (fourth high-frequency signal blocking element 48) -second earphone line 12 (signal line portion 12a) -second earphone 14-second earphone line 12 (ground line portion 12b) ) -Second audio signal separation box 10 (sixth high frequency signal cutoff element 50) -first loop antenna line 6 (second dual-purpose transmission line 44) -second ground line 42b-eighth high frequency signal cutoff element 39b-ground pattern The second earphone 14 is driven and output by 30 loops.

  In the liquid crystal television 1, as described above, the first loop antenna line 6 and the second loop antenna line 6 that have resonance characteristics with respect to radio waves in different frequency bands and have the same length by shortening the wavelength by inductance loading on one side. By providing the loop antenna line 7, the broadband characteristics of the loop antenna unit 8 can be achieved. In the liquid crystal television 1, the first loop antenna line 6 and the second loop antenna line 7 also serve as audio signal transmission lines for transmitting audio signals to the first earphone 13 and the second earphone 14. As a result, the number of codes can be reduced to improve usability. Further, in the liquid crystal television 1, the troublesome code processing is further reduced by using the loop antenna unit 8 also as a strap body for hanging around the neck.

  In the liquid crystal television 1, in the loop antenna unit 8, a high-frequency signal and an audio signal transmission line are provided by appropriately providing a high-frequency signal blocking element and an audio signal blocking element in the first loop antenna line 6 and the second loop antenna line 7. We are trying to carve out. Further, the liquid crystal television 1 has a structure in which the device main body 2 and the loop antenna portion 8 are separated by being connected via the coaxial cable 3. Therefore, in the liquid crystal television 1, the loop antenna unit 8 reduces the influence of the high-frequency signal noise, exhibits stable reception characteristics, and performs high-quality output.

  In the liquid crystal television 1 shown as the above-described embodiment, the second loop antenna line 7 is set as the audio signal supply side and the first loop antenna line 6 is set as the ground side. It is not a thing. For example, the liquid crystal television 1 may be configured such that the first loop antenna line 6 is on the audio signal supply side and the second loop antenna line 7 is on the ground side. Moreover, the liquid crystal television 1 may be configured such that the functions of the first loop antenna line 6 and the second loop antenna line 7 are interchanged on the left and right.

  In the liquid crystal television 1, the strap body 57 is hung on the neck of the user P, but may be used as a headset that is worn on the head of the user P, for example. In the liquid crystal television 1, in this case, the length of the strap body 57 and the lengths of the earphone lines 11 and 12 are appropriately set.

  In the above-described embodiment, the liquid crystal television 1 is shown. However, it is needless to say that the liquid crystal television 1 can be applied to, for example, a portable information terminal (PDA) having a television tuner function. The loop antenna unit 8 includes the first loop antenna line 6 that resonates with the fundamental wavelength of the 200 MHz band and the second loop antenna line 7 that resonates with the fundamental frequency of the 100 MHz band. A pair of loop antenna lines that resonate with a radio wave in a band is used, whereby the specification characteristics of each element are appropriately selected.

It is explanatory drawing of the use condition of the liquid crystal television shown as embodiment of this invention. 1 is a configuration block diagram of a liquid crystal television. It is a block diagram of the configuration of the loop antenna unit. It is a circuit block diagram of a loop antenna part. It is a principal part perspective view of a strap body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LCD television, 2 apparatus main body, 3 coaxial cable, 4 matching box, 5 guide holder, 6 1st loop antenna track, 7 21st loop antenna track, 8 loop antenna part, 9 1st audio | voice signal separation box, 10 2nd Audio signal separation box, 11 1st earphone line, 12 1st earphone line, 13 1st earphone, 14 2nd earphone, 15 liquid crystal monitor, 16 operation section, 17 input / output switching circuit section, 18 tuner circuit section, 19 signal processing Circuit part, 20 Liquid crystal drive circuit part, 21 Audio signal amplifier circuit part, 22 High frequency signal line, 23 First audio signal line, 24 Second audio signal line, 25 Ground line, 26 Circuit board, 27 Balun, 28 First audio Signal pattern, 29 Second audio signal pattern, 30 Ground pattern, 31 First terminal land, 32 Second terminal land, 33 1 audio signal blocking element, 34 second audio signal blocking element, 35 third terminal land, 36 fourth terminal land, 37 first high frequency signal blocking element, 38 second high frequency signal blocking element, 39a seventh high frequency signal blocking element, 39b 8th high frequency signal cutoff element, 40 1st audio | voice signal transmission line, 41 2nd audio | voice signal transmission line, 42a 1st ground line, 42b 2nd ground line, 43 1st combined transmission line, 44 2nd combined transmission line, 45 Third shared transmission line, 46 Fourth shared transmission line, 47 Third high frequency signal blocking element, 48 Fourth high frequency signal blocking element, 49 Fifth high frequency signal blocking element, 50 Sixth high frequency signal blocking element, 51 Third voice Signal blocking element, 52 4th audio signal blocking element, 53 5th audio signal blocking element, 54 6th audio signal blocking element, 55 1st loading coil, 56 2nd rhode Coil, 57 strap body

Claims (9)

A balun for impedance conversion from balanced transmission mode to unbalanced transmission mode;
A first loop antenna line connected at both ends to the balanced transmission mode side terminal of the balun and having resonance characteristics with respect to radio waves in a first frequency band;
Both ends are connected to the balanced transmission mode side terminal of the balun, have resonance characteristics with respect to radio waves in the second frequency band lower than the radio waves in the first frequency band, and shorten the wavelength by loading the inductance. A second loop antenna line having substantially the same length as the first loop antenna line,
The first loop antenna line having one end connected to the audio signal output source and the other end connected to the balun via the first audio signal blocking element or the second audio signal blocking element, or the above Each of the second loop antenna lines is connected to one of the loop antenna lines via the first high-frequency signal cutoff element or the second high-frequency signal cutoff element, and an audio signal is supplied to each one of the loop antenna lines. A first audio signal transmission line and a second audio signal transmission line;
Each one of the loop antenna lines branches from the connection portion with the balun at a predetermined length position via a third high-frequency signal blocking element or a fourth high-frequency signal blocking element, and the first earphone or the first A first earphone line and a second earphone line respectively connected to the two earphones and connected to the other loop antenna line from the earphones via the fifth high-frequency signal cutoff element or the sixth high-frequency signal cutoff element,
A first ground line branched from each of the other loop antenna lines and connected to the ground via a seventh high-frequency signal cutoff element and an eighth high-frequency signal cutoff element in the vicinity of the balanced transmission mode side terminal of the balun; Composed of a second ground line,
The first loop antenna line and the second loop antenna line are divided between the connection portion of the first audio signal transmission line or the second audio signal transmission line and the first earphone line or the second earphone line. An earphone-integrated antenna comprising an audio signal transmission line together with a high-frequency signal transmission line between the first ground line or the branching portion with the second ground line via a connecting portion.   The earphone-integrated antenna according to claim 1, wherein the first frequency band radio wave and the second frequency band radio wave are a 100 MHz frequency band radio wave and a 200 MHz frequency band radio wave.   A pair of third audio signal blocking elements located on the distal end side of each branch / connecting portion of the first earphone line and the second earphone line, the first loop antenna line and the second loop antenna line; The earphone integrated antenna according to claim 1, wherein a fourth audio signal blocking element, a fifth audio signal blocking element, and a sixth audio signal blocking element are provided.   The first loop antenna line and the second loop antenna line are connected to each other within a flexible strap body between the respective branching / connecting portions of the first earphone line and the second earphone line. The earphone-integrated antenna according to claim 1, wherein the antenna is sealed with a gap. A circuit board on which the balun is mounted; and a first terminal land and a second terminal land to which the balanced transmission mode side terminal of the balun is connected, and the first terminal land and the second terminal land. A third terminal land and a fourth terminal land connected via the first audio signal blocking element and the second audio signal blocking element, and the first high frequency with respect to the third terminal land and the fourth terminal land. A first audio signal transmission pattern and a second audio signal transmission pattern, which are connected via a signal cutoff element and the second high-frequency signal cutoff element, respectively, and constitute the first audio signal transmission line and the second audio signal transmission line; The ground pattern in which the first terminal land and the second terminal land are connected via the seventh high-frequency signal blocking element and the ground terminal of the balun is connected. There is formed,
The one loop antenna line is connected at both ends to the third terminal land and the fourth terminal land, and the other loop antenna line is connected at both ends to the first terminal land and the second terminal land. 2. The earphone according to claim 1, wherein a signal line and a ground line of a coaxial cable are connected to the unbalanced transmission mode side terminal, the first audio signal transmission pattern, the second audio signal transmission pattern, and the ground pattern. Integrated antenna. A matching box for accommodating the balun and pulling out the first loop antenna line and the second loop antenna line in a loop shape,
2. The earphone integrated antenna according to claim 1, wherein the first loop antenna line and the second loop antenna line are drawn with a drawing angle of approximately 90 °. A balun for impedance conversion from a balanced transmission mode to an unbalanced transmission mode, a first loop antenna line connected at both ends to the balanced transmission mode side terminal of the balun and having resonance characteristics with respect to radio waves in a first frequency band; Both ends are connected to the terminal on the balanced transmission mode side, have resonance characteristics with respect to the radio wave in the second frequency band lower than the radio wave in the first frequency band, and the wavelength is shortened by the inductance loading so as to reduce the wavelength. A second loop antenna line having substantially the same length as the loop antenna line, one end side of which is connected to the audio signal output source, and the other end side of the first audio signal blocking element or the second to the balun. The loop antenna of either the first loop antenna line or the second loop antenna line connected via an audio signal blocking element A first audio signal transmission line and a second audio signal, which are respectively connected to the signal line via a first high-frequency signal cutoff element or a second high-frequency signal cutoff element and supply an audio signal to each one of the loop antenna lines. The transmission line and each one of the loop antenna lines are branched from the connecting portion of the balun at predetermined length positions via a third high-frequency signal cutoff element or a fourth high-frequency signal cutoff element, and the first A first earphone line and a second earphone line connected to the earphone or the second earphone, respectively, and connected to the other loop antenna line from the earphones via the fifth high-frequency signal cutoff element or the sixth high-frequency signal cutoff element, respectively. Branching from the other loop antenna line and in the vicinity of the balanced transmission mode side terminal of the balun. An antenna portion of the earphone integral is composed of a first ground line and a second ground line connected to the ground through the seventh RF signal blocking element and the eighth high-frequency signal blocking element, respectively,
A coaxial cable that is connected to the unbalanced transmission mode side terminal of the balun and transmits a high-frequency signal and an audio signal;
At least a receiving circuit unit to which the coaxial cable is connected, a signal processing unit that performs signal processing on the high-frequency signal, a monitor unit that displays and outputs video based on the video signal output from the signal processing unit, and the signal processing An audio signal output unit that outputs the audio signal output from the unit to the first audio signal transmission line and the second audio signal transmission line;
A portable wireless electronic device comprising:   The said antenna part is equipped with the said 1st loop antenna track | line and the said 2nd loop antenna track | line which have a resonance characteristic with respect to the radio wave of a 100-MHz frequency band, and a 200-MHz frequency band. Portable wireless electronic devices. The antenna unit connects the first loop antenna line and the second loop antenna line between the branching / connecting parts of the third audio signal transmission line and the fourth audio signal transmission line facing each other. In a flexible strap body with a predetermined interval,
8. The portable wireless electronic device according to claim 7, wherein the strap body constitutes a strap portion to be attached to a user's neck or head.

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