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WO2010095356A1 - Récepteur de télévision - Google Patents

Récepteur de télévision Download PDF

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Publication number
WO2010095356A1
WO2010095356A1 PCT/JP2010/000354 JP2010000354W WO2010095356A1 WO 2010095356 A1 WO2010095356 A1 WO 2010095356A1 JP 2010000354 W JP2010000354 W JP 2010000354W WO 2010095356 A1 WO2010095356 A1 WO 2010095356A1
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WO
WIPO (PCT)
Prior art keywords
antenna
television receiver
antennas
horizontally polarized
diagram showing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2010/000354
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English (en)
Japanese (ja)
Inventor
高井均
長谷和俊
静谷治
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Panasonic Corp
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Panasonic Corp
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Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of WO2010095356A1 publication Critical patent/WO2010095356A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof

Definitions

  • the present invention relates to a television receiver that receives a television broadcast in an indoor or indoor diffuse reflection environment.
  • indoor or indoor television receivers that are not restricted by the wall antenna terminal receive broadcast waves with indoor antennas, so-called indoor antennas, and connect the indoor antennas to the television receivers with antenna wires and view It is common to do.
  • FIG. 22A shows a first example of a conventional antenna.
  • the antenna 600 has an 8-shaped antenna element 610 inside, and a reflector 620 on the back surface of the antenna element 610.
  • an antenna that is small but has a directivity narrowed in a single direction to obtain an antenna gain (see Patent Document 1).
  • Patent Document 1 a mode is also disclosed in which the antenna 600 is installed indoors, the antenna 600 is connected to a television receiver with a cable, and viewing is performed indoors.
  • FIG. 22B in indoor 670 or indoor reception, the electric field strength is reduced due to intrusion transmission loss of radio waves into the building, and good reception is difficult.
  • a second example of a conventional antenna has a structure 710 that looks like a paraboloid as shown in FIG. 23A. As shown in FIGS. 23B and 23C, a groove 720 is provided on the back surface of the structure 710 that looks like a paraboloid. Further, an antenna element 730 as shown in the front view of FIG. 23D and the side view of FIG. 23E is housed. With such a configuration, an indoor antenna has been disclosed in which a depression of a side directivity characteristic is reduced and a directivity characteristic is weakened on the contrary, as compared with an 8-shaped directivity characteristic of a normal dipole (see Patent Document 2).
  • Patent Document 2 also discloses the idea of switching the above-described modified dipole and rod antenna 740 with a switch 750 and using the better reception state at the place where the switch is placed.
  • FIG. 24A shows a third example of a conventional antenna.
  • the television receiver 800 is an integrated body of a television receiver body 830 including a display unit 810 and a keyboard 820.
  • an indoor antenna 821 is built in the keyboard 820.
  • the indoor antenna 821 controls the voltage applied to the varactor diodes loaded on the parasitic elements before and after the power supply element of the indoor antenna 821.
  • the direction of directivity can be appropriately controlled (see Patent Document 3).
  • Such a method can be integrated with the cable between the antenna and the television receiver omitted, so that it is preferable from the viewpoint of freestyle because of high mobility.
  • a dipole 910 deformed into a rectangular ring shape as shown in FIG. 25 and a monopole antenna 920 deformed into an L-shape are combined, and a better antenna is switched and selected.
  • Diversity antennas for outdoor and on-vehicle mobile environments have been proposed (see Patent Document 4).
  • the dipole 910 deformed into a rectangular ring shape can receive horizontal polarization and can obtain a substantially omnidirectional directional characteristic, unlike the figure 8 of a normal dipole, while receiving horizontal polarization.
  • the monopole antenna 920 transformed into an L-shape can receive not only the horizontal polarization component but also the vertical polarization component at the vertical rising portion.
  • Patent Document 2 or Patent Document 4 when the directivity is expanded by deforming the element, or both the vertically polarized wave and the horizontally polarized wave are added in addition to the deformation and inclination of the element. Can receive radio waves of various directions and polarizations.
  • the antenna gain in an arbitrary direction and an arbitrary polarization is reduced as a whole, the reception situation cannot be improved after all.
  • Patent Document 2 or Patent Document 4 even in a conventional configuration in which a better antenna is selected and switched among a plurality of antennas, in a semi-fixed use style, different fluctuations are generated unlike in the case of movement. The improvement effect as the diversity used cannot be expected. Therefore, when the arrival wave power is dispersed in various arrival directions and polarizations, the reception power of all the antennas cannot be effectively used after all. As a result, there is a problem that the reception situation is not improved so much.
  • JP 2008-118353 A Japanese Patent No. 2675973 Japanese Patent No. 3847301 Japanese Patent No. 3165465
  • a television receiver of the present invention is a television receiver that receives broadcast waves from a broadcasting station that transmits polarized waves in a predetermined direction in an indoor room, and includes a chassis body, two or more horizontally polarized antennas, One or more vertically polarized antennas, a synthesis unit, and a demodulation unit are provided. Two or more horizontally polarized antennas receive horizontally polarized waves attached to the chassis body. One or more vertically polarized antennas receive vertically polarized waves attached to the chassis body.
  • the synthesizer synthesizes three or more signals received by two or more horizontally polarized antennas and one or more vertically polarized antennas by adjusting the phase so that the carrier wave phases overlap and performing weighting.
  • the demodulation unit demodulates the signal synthesized by the synthesis unit.
  • the two or more horizontally polarized antennas are arranged so that the directional radiation patterns are complementary to each other.
  • the signal-to-noise ratio of the received signal is positively increased by combining and utilizing incoming waves from any direction on the horizontal plane for both horizontal and vertical polarization components. This enables better and more stable TV viewing.
  • FIG. 1A is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1B is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1A is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 1B is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 2A is a diagram showing
  • FIG. 3 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 4 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 5 is a block diagram showing an internal configuration of the combining unit of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 6 is an internal configuration diagram of the combining unit of the television receiver according to Embodiment 1 of the present invention.
  • FIG. 7 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8A is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8D is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver in Embodiment 2 of the present invention.
  • FIG. 8B is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8C is a diagram showing a directional radiation pattern on the horizontal plane of the antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 8D is a diagram showing a directional radiation pattern
  • FIG. 9 is a diagram showing a directional radiation pattern obtained by superimposing directional radiation patterns on the horizontal plane of each antenna of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 12 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver according to Embodiment 2 of the present invention.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 12 is a conceptual diagram
  • FIG. 14 is a conceptual diagram showing an antenna configuration of another example of a television receiver according to Embodiment 2 of the present invention.
  • FIG. 15 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 16 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 18 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of the television receiver in Embodiment 2 of the present invention.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of the television receiver in Embodiment 2 of the present invention.
  • FIG. 20 is a conceptual diagram showing an antenna configuration of another example of a television receiving apparatus according to Embodiment 2 of the present invention.
  • FIG. 21 is a conceptual diagram showing an antenna configuration of the television receiver according to Embodiment 3 of the present invention.
  • FIG. 22A is a conceptual diagram showing a conventional first antenna configuration.
  • FIG. 22B is a conceptual diagram showing a first conventional antenna configuration.
  • FIG. 23A is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23B is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23C is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23D is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 23E is a conceptual diagram showing a conventional second antenna configuration.
  • FIG. 24A is a conceptual diagram showing a conventional third antenna configuration.
  • FIG. 24B is a conceptual diagram showing a conventional third antenna configuration.
  • FIG. 25 is a conceptual diagram showing a conventional fourth antenna configuration.
  • FIG. 1A and 1B are conceptual diagrams showing an antenna configuration of television receiving apparatus 100 in the present embodiment.
  • FIG. 1A shows a projection view from the front of the television receiver 100.
  • FIG. 1B shows a projection view of the television receiver 100 from an oblique rear side.
  • the television receiver 100 includes a display unit 150, a support unit 103, a chassis main body 102, three antennas including a monopole antenna 191, a dipole antenna 192, and a sleeve antenna 193 as an antenna unit 190 attached to the chassis main body 102. It has.
  • the three antennas of the antenna unit 190 are arranged as follows. That is, the monopole antenna 191 is disposed perpendicular to the horizontal plane, the dipole antenna 192 is disposed parallel to the horizontal plane, the sleeve antenna 193 is parallel to the horizontal plane, and is disposed perpendicular to the dipole antenna 192. It has become.
  • the antenna unit 190 has an arrangement in which the elements of these three antennas are orthogonal to each other.
  • the sleeve antenna 193 is a kind of dipole antenna composed of a ⁇ / 4 long central conductor of a feeding coaxial line and a ⁇ / 4 long coaxial outer conductor whose tip is open.
  • FIG. 2A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191.
  • FIG. 2B is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192.
  • FIG. 2C is a diagram showing a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the sleeve antenna 193.
  • FIG. 3 is a diagram showing a directional radiation pattern in which the directional radiation patterns on the horizontal plane of each antenna shown in FIGS. 2A, 2B, and 2C are superimposed.
  • the vertical polarization component as indicated by the dotted line, the signal from any direction can be received by the circular radiation pattern of the monopole antenna 191.
  • the horizontal polarization component as shown by the solid line, the 8-shaped radiation patterns of the dipole antenna 192 and the sleeve antenna 193 overlap to receive signals from any direction.
  • two dipole antennas 192 and sleeve antennas 193 are given as examples of horizontally polarized antennas
  • the present invention can be applied to two or more antennas.
  • one monopole antenna 191 is taken as an example, but the present invention can be applied to two or more antennas.
  • two or more vertically polarized antennas are arranged so that their directional radiation patterns are complementary to each other.
  • a larger number is preferable because the directivity pattern can be averaged in all directions.
  • the larger the number of antennas the more complicated the circuit configuration downstream of the antennas. Therefore, an appropriate number of antennas suitable for the purpose should be selected.
  • the television receiver 100 includes two or more horizontally polarized antennas that are attached to the chassis main body 102 and receive a horizontally polarized wave, that is, a dipole antenna 192 and a sleeve antenna 193. And one or more vertically polarized antennas that are attached to the chassis main body 102 and receive a vertically polarized wave, that is, a monopole antenna 191.
  • the horizontal polarization antenna is composed of two dipole antennas 192 and a sleeve antenna 193, and the vertical polarization antenna is composed of one monopole antenna 191. All of the vertically polarized antennas are orthogonal to each other.
  • FIG. 4 is a block diagram showing a circuit configuration of television receiver 100 in the present embodiment.
  • FIG. 5 is a block diagram showing an internal configuration of the synthesis unit 120 in FIG.
  • television receiver 100 includes low-noise amplifiers connected to monopole antenna 191, dipole antenna 192, and sleeve antenna 193 that are antennas of antenna unit 190. 111 to 113, a synthesis unit 120, a demodulation error correction unit 130, a video / audio decoding unit 140, a display unit 150, and a speaker unit 160.
  • the television receiver 100 amplifies the signals received by the monopole antenna 191, the dipole antenna 192, and the sleeve antenna 193 of the antenna unit 190 by the low-noise amplifiers 111 to 113 and synthesizes them by the synthesis unit 120. . Then, the television receiver 100 performs demodulation processing and error correction processing on the synthesized signal in the demodulation error correction section 130 and extracts it as a received information data sequence, and the video / audio decoding section 140 displays the video signal and audio signal as a display section 150. And output to the speaker unit 160.
  • the display unit 150 includes a display device such as a liquid crystal display or a plasma display and a driver circuit thereof, and draws and displays a received image from the received video signal.
  • the speaker unit 160 includes a speaker and a driving amplifier circuit thereof, and generates sound from the received audio signal.
  • the low noise amplifiers 111 to 113 are received by an amplifier having a low noise index immediately below the antenna in consideration of the low electric field strength environment of the broadcast radio waves received indoors or indoors and various noise radio waves mixed with the antenna integration. It is preferable to amplify radio waves in order to improve sensitivity. However, it may be omitted and the antenna and the combining unit 120 may be directly connected.
  • the combining unit 120 includes front end units 1211 to 1213, analog-digital (hereinafter abbreviated as “A / D”) conversion units 1221 to 1223, pilot extraction transmission path estimation units 1251 to 1253, phase It is composed of correction weighting units 1261 to 1263 and an addition / synthesis unit 127.
  • the synthesizing unit 120 shows an example of a configuration in the case of a single carrier system represented by the ATSC system which is a digital television broadcasting system such as the United States.
  • an 8-level residual sideband (VSB) amplitude modulation method is used as a modulation method in the case of the ATSC method.
  • the television signal modulated by this modulation method and received by each antenna of the antenna unit 190 is first converted to a low frequency band at the same time as the target signal is selected and amplified to an appropriate level by the front end units 1211-1213.
  • a / D converters 1221 to 1223 convert the digital signals.
  • the phase correction weighting units 1261 to 1263 adjust the phase so that the phases of the outputs overlap with each other using this signal as a pilot signal, and the addition / synthesis unit 127 Add and synthesize.
  • the signal-to-noise ratio of the carrier wave signal that is a pilot signal is also detected by the pilot extraction transmission path estimation units 1251 to 1253, and the phase correction weighting units 1261 to 1263 also perform weighting in proportion to the value. It is more preferable to perform the so-called maximum ratio combining, in which the addition combining unit 127 adds and combines.
  • the level of the carrier signal that is a pilot signal may be used instead of the signal-to-noise ratio, or the level of the total signal may be used instead.
  • the ATSC signal is a wideband signal
  • the multipath transmission line often involves linear distortion with a disturbed frequency characteristic. Therefore, it is desirable that the pilot extraction transmission path estimation units 1251 to 1253 perform the estimation of the transmission path characteristics by using signal characteristics such as a specific information pattern in the ATSC signal.
  • the phase correction weighting units 1261 to 1263 correct the multipath transmission line distortion by multiplying the reciprocal of the transmission line estimation result simultaneously with the above phase correction and weighting, and add and combine them by the adder / synthesizer 127. More preferably, maximum ratio synthesis is performed.
  • the synthesizing unit 120 can obtain a combined signal for demodulation with a positively increased signal-to-noise ratio by correcting and adjusting each input signal well and adding and synthesizing. it can.
  • television receiving apparatus 100 in the present embodiment performs at least three antennas having element arrangements orthogonal to each other, and appropriately weights the received signals from these antennas by matching the carrier wave phases with each other.
  • phase correction weighting units 1261 to 1263 it is possible to perform demodulation by using the signal synthesized by the addition synthesis unit 127 and synthesized as a received signal.
  • the three antennas described above receive one or more vertically polarized antennas attached to the chassis main body 102 for receiving vertical polarized waves, and the horizontal polarized waves attached to the chassis main body 102. And two or more horizontally polarized antennas whose maximum gain directions are orthogonal to each other.
  • the signal-to-noise ratio of the received signal can be positively increased by using and synthesizing incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane. Therefore, in indoor or indoor reception, it is possible to obtain the maximum reception sensitivity at the place where it is placed and to perform better television viewing.
  • the composition unit 120 is configured in the case of a single carrier system typified by the ATSC system, which is a digital television broadcasting system such as the United States.
  • ATSC system which is a digital television broadcasting system such as the United States.
  • OFDM orthogonal frequency multiplexing
  • ISDB-T system and DVB-T system which are digital television broadcasting systems such as Japan and Europe, may be used.
  • combining section 120 includes front end sections 1211 to 1213, A / D conversion sections 1221 to 1223, guard interval (hereinafter abbreviated as “GI”) removal frequency control sections 1231 to 1233, Fast Fourier Transform (hereinafter abbreviated as “FFT”) units 1241 to 1243, pilot extraction transmission path estimation units 1251 to 1253, phase correction weighting units 1261 to 1263, and an adder / synthesizer 127.
  • This combining unit 120 is an example of a configuration in the case of an orthogonal frequency multiplexing (OFDM) system using a number of subcarriers typified by ISDB-T system and DVB-T system, which are digital television broadcasting systems such as Japan and Europe. Is shown.
  • OFDM orthogonal frequency multiplexing
  • the front end units 1211 to 1213 and the A / D conversion units 1221 to 1223 are the same as those described with reference to FIG.
  • Each received signal that has become a digital signal is first corrected by the GI removal frequency control units 1231-1233 using a guard interval signal or the like to correct a frequency shift, and an appropriate symbol timing is detected.
  • the signal information is arranged and adjusted and input to the FFT units 1241 to 1243.
  • the FFT units 1241 to 1243 decompose the received signals for each subcarrier and output them.
  • Pilot extraction transmission path estimators 1251 to 1253 extract pilot signals regularly inserted in advance on the transmission side in both the symbol direction and the subcarrier direction.
  • pilot extraction transmission path estimation sections 1251 to 1253 interpolate and extrapolate from these pilot signals to obtain the amplitude and phase of each subcarrier, and at the same time, transmission path characteristics subjected to linear distortion in the multipath transmission path.
  • Estimate Phase correction weighting sections 1261 to 1263 multiply multipath transmission line distortion by multiplying the reciprocal of the transmission path estimation result (frequency equalization), and adjust the phase so that the phases overlap between the corresponding subcarriers of each system.
  • the adder / synthesizer 127 adds and synthesizes each subcarrier.
  • the phase correction weighting units 1261 to 1263 also perform weighting, and the summing unit 127 adds and synthesizes so-called maximum ratio combining. Is more preferable.
  • the level of each subcarrier may be used instead of the signal-to-noise ratio.
  • FIG. 7 is a conceptual diagram showing an antenna configuration of television receiver 320 according to Embodiment 2 of the present invention.
  • FIG. 8A, FIG. 8B, FIG. 8C, and FIG. 8D are figures which show the directional radiation pattern in the horizontal surface of each antenna.
  • FIG. 9 is a diagram showing a directional radiation pattern in a horizontal plane superimposed on the horizontal plane of each antenna.
  • FIG. 10 is a block diagram showing a circuit configuration.
  • the antenna configuration of FIG. 1A in Embodiment 1 is different from the antenna configuration of the television receiver 320 in this embodiment in that it can be moved instead of one sleeve antenna 193. That is, the monopole antennas 1911 and 1912 are arranged. That is, the antenna unit 1910 attached to the chassis main body 102 includes four antennas, a monopole antenna 191, a dipole antenna 192, and two monopole antennas 1911 and 1912. Note that the dipole antenna 192 may also be movable. Others are denoted by the same reference numerals as those in the first embodiment, and are the same as those described with reference to FIG.
  • FIG. 8A is a diagram showing a directional radiation pattern of a vertically polarized component in the horizontal plane of the monopole antenna 191.
  • FIG. 8B is a diagram illustrating a directional radiation pattern of a horizontally polarized wave component on the horizontal plane of the dipole antenna 192.
  • FIG. 8C is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1911.
  • FIG. 8D is a diagram showing a directional radiation pattern of a horizontal polarization component in the horizontal plane of the monopole antenna 1912.
  • the directional radiation pattern rotates to the left and right as shown in FIGS. 8C and 8D.
  • the monopole antennas 1911 and 1912 are swung up and down, the vertical polarization component can be received by these antennas while the directional radiation pattern on the horizontal plane is substantially unchanged.
  • the dipole antenna 192 is turned to the left and right while keeping parallel to the horizontal plane, the directional radiation pattern rotates to the left and right as shown in FIG. 8B.
  • the element of the dipole antenna 192 is swung upward or downward, a vertical polarization component can be received by these antennas with the directional radiation pattern on the horizontal plane substantially unchanged.
  • the television receiver 320 of this embodiment is characterized in that at least one of the two or more horizontally polarized antennas can move the direction.
  • FIG. 9 is a diagram showing a directional radiation pattern in the horizontal plane obtained by superimposing the directional radiation patterns in the horizontal plane of each antenna shown in FIGS. 8A, 8B, 8C, and 8D.
  • the two monopole antennas 1911 and 1912 are preferably arranged in parallel to the horizontal plane while maintaining orthogonality with the monopole antenna 191 arranged vertically.
  • Two dipole antennas 192 may be arranged while maintaining orthogonality, but the monopole antennas 1911 and 1912 are arranged in a horizontal plane with respect to the dipole antenna 192 as indicated by a solid line with respect to the horizontal polarization component. It is preferable to swing about 30 ° left and right in the orthogonal direction. As a result, in combination with the figure 8 radiation pattern of the dipole antenna 192, the signal from any direction can be efficiently received with respect to the horizontal polarization component more uniformly.
  • Some broadcast stations may transmit in vertically polarized waves.
  • the vertically polarized wave component in addition to the circular radiation pattern of the monopole antenna 191, as shown by the dotted line, this time, either one or both of the monopole antennas 1911 and 1912 are used. It is preferable to shake the dipole antenna 192 up and down while maintaining orthogonality. Further, the element of the dipole antenna 192 may be swung upward or downward. As a result, vertical polarization components can be received by these antennas, and more vertical polarization components can be received.
  • the chassis body 102 itself does not move, and the movable antenna, that is, the monopole antenna 1911 or the monopole antenna 1912 in the example of FIG.
  • the sharing of each antenna can be changed.
  • the monopole antennas 1911 and 1912 and the dipole antenna 192 are also used when the direct reception wave from the window or the like is significant as compared with the reflected scattered wave and the arrival direction of the radio wave is not universal and is slightly biased. Even if the television receiver 320 is placed in a place where it is difficult to receive in the place where it is difficult to receive, it is possible to move at least one of the directional radiation patterns intentionally. The advantage of being able to find out the reception status is born.
  • FIG. 10 is a block diagram showing a circuit configuration of the television receiver 320 according to Embodiment 2 of the present invention.
  • the internal configuration diagram of the combining unit 120 is exactly the same as the number of systems before the addition combining unit 127 of FIG. 5 or FIG.
  • the number of antennas that is, the number of systems can be increased arbitrarily, and the coverage of the polarization component and the directivity of each antenna constituting the antenna unit 190 has a reasonable overlap, but is universal. By sharing the distribution, better television viewing can be expected as the number increases.
  • the number of antennas is increased, and some antennas are movable in the horizontal or vertical direction according to the transmission wave of the horizontal polarization or the vertical polarization of the broadcasting station.
  • incoming waves from any direction of vertical polarization, horizontal polarization, and horizontal plane can be used and synthesized more efficiently. Therefore, the signal-to-noise ratio of the received signal in the television receiver 320 can be further increased, and in indoor or indoor reception, the maximum reception sensitivity can be obtained at a place where the television receiver 320 is placed, and better television viewing can be performed. .
  • the main body does not move as it is in the preferred location, and the sharing of vertical polarized waves, horizontal polarized waves, and directional radiation patterns with each antenna is changed.
  • the advantage of being able to find out the reception status of is born.
  • the above-mentioned advantages are achieved by taking advantage of redundancy by increasing the number of antennas from the minimum of three that can maintain the orthogonal relationship of each antenna and cover all directions of vertical polarization, horizontal polarization, and horizontal plane.
  • up to one or more movable antennas and any antenna may be movable.
  • Various types of antennas can also be applied. Below are some examples and benefits.
  • FIG. 11 is a conceptual diagram showing an antenna configuration of another example of the television receiver 321 according to Embodiment 2 of the present invention.
  • the television receiver 321 includes whip antennas 1941 and 1942.
  • Whip antennas 1941 and 1942 improve the reception performance by making the element length longer than 3/4 wavelength or the like, and are easy to realize mobility by using a flexible material.
  • the antenna radiation patterns of whip antennas 1941 and 1942 with longer element lengths are suppressed in the vertical direction, but on the other hand, the sensitivity of horizontal polarization in the horizontal plane is improved. Furthermore, since it extends downward, it has sensitivity to vertical polarization.
  • FIG. 12 is a conceptual diagram showing an antenna configuration of another example of television receiver 322 according to Embodiment 2 of the present invention.
  • the television receiver 322 includes sleeve antennas 1931 and 1932.
  • the sleeve antennas 1931 and 1932 do not use the chassis as a ground, unlike a monopole or a whip. Therefore, it is difficult to receive various noise signals generated from the main circuit, which is likely to be a problem with the antenna directly attached to the chassis main body 102. As a result, there is an advantage that it is easy to realize a television receiver 322 with higher sensitivity.
  • FIG. 13 is a conceptual diagram showing an antenna configuration of another example of the television receiver 323 according to Embodiment 2 of the present invention.
  • the television receiver 323 includes dipole antennas 1921 and 1922 at the left and right ends of the chassis main body 102, respectively. Since the dipole antennas 1921 and 1922 are balanced antennas that do not use the chassis as a ground, it is difficult to receive various noise signals generated from the body circuit, which are likely to cause problems with antennas directly attached to the chassis body 102. As a result, there is an advantage that it is easy to realize a television receiver 323 with higher sensitivity.
  • FIG. 14 is a conceptual diagram showing an antenna configuration of another example of television receiver 324 according to Embodiment 2 of the present invention.
  • the television receiver 324 is less likely to receive various noise signals generated from the main circuit by attaching the dipole antennas 1921 and 1922 to the upper and both shoulders of the chassis main body 102.
  • FIG. 15 is a conceptual diagram showing an antenna configuration of another example of television receiver 325 according to Embodiment 2 of the present invention.
  • the television receiver 325 includes V-type dipole antennas 1951 and 1952.
  • the television receiver 325 has an advantage of making it difficult to receive noise by changing the V-type dipole antennas 1951 and 1952 into modified V-type dipoles.
  • the television receiver 325 may distribute directivity between the left and right V-shaped dipole antennas 1951 and 1952, and may direct the directivity toward the outside of the chassis main body 102. By doing so, there is an advantage that a more sensitive television receiver 325 can be realized.
  • FIG. 16 is a conceptual diagram showing an antenna configuration of another example of television receiver 326 according to Embodiment 2 of the present invention.
  • the television receiver 326 includes circular loop antennas 1961 and 1962.
  • the television receiver 326 receives more various noise signals generated from the main body circuit by providing circular loop antennas 1961 and 1962 that are balanced antennas that do not use the chassis as a ground at a higher position of the chassis main body 102. It can be difficult. Therefore, there is an advantage that the television receiver 326 having high sensitivity can be easily realized.
  • FIG. 17 is a conceptual diagram showing an antenna configuration of another example of the television receiver 327 according to Embodiment 2 of the present invention.
  • the television receiver 327 includes rectangular loop antennas 1971 and 1972.
  • the television receiver 327 has advantages that the rectangular loop antennas 1971 and 1972 are balanced antennas that are resistant to noise, and that the protrusions to the rear and upward, which are difficult for users and aesthetics, can be reduced. Arise.
  • FIG. 18 is a conceptual diagram showing an antenna configuration of another example of television receiver 328 according to Embodiment 2 of the present invention.
  • the antenna terminals are closer to each other by taking the feed points of the rectangular loop antennas 1971 and 1972 upward as shown in FIG. 18 than taking the feed points of the rectangular loop antennas 1971 and 1972 downward. Can be placed.
  • this arrangement makes it possible to place a feeding point that becomes an antinode of current distribution at a high position, which is advantageous in obtaining a higher signal-to-noise ratio.
  • the rectangular loop antennas 1971 and 1972 are composed of linear elements having an overall length of approximately wavelength ⁇ , have a radiation pattern in the vertical direction of the rectangular loop surface, and the long side of the rectangle is up and down. Is suppressed.
  • the rectangular loop antennas 1971 and 1972 there is an advantage that the sensitivity of horizontal polarization in the horizontal plane is good.
  • FIG. 19 is a conceptual diagram showing an antenna configuration of another example of television receiver 329 according to Embodiment 2 of the present invention.
  • the television receiver 329 includes an offset dipole antenna 1923.
  • the offset dipole antenna 1923 has a configuration in which the feeding position of the upper dipole antenna 192 in FIG. 15 is modified, and the directivity of horizontal polarization is the same as that of a normal dipole. Further, since the feeding position of the offset dipole antenna 1923 is greatly separated from the monopole antenna 191, interference between the parallel feed line of the dipole and the monopole antenna 191 is eliminated, and the circular directivity is maintained. Further, in the television receiver 325 of FIG.
  • the television receiver 329 has an advantage of giving a degree of freedom to the selection of the feeding position in the upper part of the chassis main body 102.
  • FIG. 20 is a conceptual diagram showing an antenna configuration of another example of the television receiver 330 according to Embodiment 2 of the present invention.
  • the television receiver 330 has an L-shaped monopole antenna 1913.
  • the L-shaped monopole antenna 1913 is a linear antenna that is formed in an L-shape by opening the tip along the upper end portion of the chassis main body 102 and bending it near the feeding portion.
  • the L-shaped monopole antenna 1913 can receive vertically polarized waves generated in the chassis main body 102 and the linear portion, and its directivity is substantially circular.
  • the L-shaped monopole antenna 1913 is less likely to interfere with the dipole antenna 192 because the linear portions are parallel to each other.
  • the L-shaped monopole antenna 1913 there is an advantage that a degree of freedom is given to selection of a feeding position in the upper part of the chassis main body 102.
  • FIG. 21 is a conceptual diagram showing an antenna configuration of television receiving apparatus 331 according to Embodiment 3 of the present invention.
  • the television receiver 331 includes an antenna switching unit 170 and an external antenna connection terminal 180.
  • the external antenna connection terminal 180 can connect the outdoor antenna 210 or the indoor antenna 220 through the antenna cable 200.
  • the antenna switching unit 170 can switch between the external antenna connection terminal 180 and any one of the antennas attached to the chassis main body 102.
  • the present embodiment is different from the second embodiment in that an antenna switching unit 170 is provided and an external antenna connection terminal 180 and an antenna cable 200 are used instead of one system (here, the monopole antenna 1911).
  • the outdoor antenna 210 connected to the wall antenna terminal 205 can be connected.
  • the antenna cable 200 can be connected to the indoor antenna 220.
  • Others are the same as those described in the first and second embodiments, and thus will be omitted.
  • an antenna switching unit 170 is provided so that an external antenna can be connected instead of one system. Therefore, when there is the wall antenna terminal 205 near or by adding the indoor antenna 220 near, the three antennas that are orthogonally arranged, as described in the first embodiment, the vertical / horizontal polarization, horizontal plane In addition to taking advantage of the incoming wave power around the inner circumference, the signals of the additional antennas can be added together. As a result, the signal-to-noise ratio of the received signal can be further increased, and better and more stable TV viewing can be performed.
  • the television receiver according to the present invention uses an incoming wave from any direction of a vertically polarized wave, a horizontally polarized wave, and a horizontal plane, regardless of where the antenna-equipped television receiver is placed at random in an indoor or indoor diffuse reflection environment. By combining them, the signal-to-noise ratio of the received signal can be positively increased. As a result, it is possible to perform better and more stable television viewing, which is useful as a television receiving device for viewing indoors or indoors in a free style.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Transmission System (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne un récepteur de télévision, comprenant : au moins deux antennes à polarisation horizontale fixées à un châssis principal et recevant des ondes à polarisation horizontale ; une antenne à polarisation verticale fixée au châssis principal et recevant des ondes à polarisation verticale ; un synthétiseur conçu pour régler les phases d'au moins trois signaux reçus par lesdites au moins deux antennes à polarisation horizontale et l'antenne à polarisation verticale de façon à faire se chevaucher les phases des ondes porteuses, et pour pondérer et synthétiser les signaux ; et un décodeur conçu pour décoder les signaux synthétisés par le synthétiseur. Lesdites au moins deux antennes à polarisation horizontale sont agencées de telle sorte que leurs diagrammes de directivité associés soient complémentaires, le processus de synthèse utilisant ainsi toutes les ondes incidentes issues de toutes les directions dans un plan horizontal ainsi que les ondes à polarisation verticale et à polarisation horizontale.
PCT/JP2010/000354 2009-02-18 2010-01-22 Récepteur de télévision Ceased WO2010095356A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-034955 2009-02-18
JP2009034955A JP2012094931A (ja) 2009-02-18 2009-02-18 テレビ受信装置

Publications (1)

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WO2010095356A1 true WO2010095356A1 (fr) 2010-08-26

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WO (1) WO2010095356A1 (fr)

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WO2018221188A1 (fr) * 2017-05-31 2018-12-06 株式会社オートネットワーク技術研究所 Dispositif d'antenne embarqué

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JP6099811B2 (ja) * 2013-04-28 2017-03-22 グッテル カンパニーリミテッドＧｏｏｄｔｅｌｌ． Ｃｏ．，Ｌｔｄ． 多重帯域アンテナ
US9912043B1 (en) * 2016-12-31 2018-03-06 Airgain Incorporated Antenna system for a large appliance
WO2019151202A1 (fr) * 2018-01-31 2019-08-08 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Dispositif de traitement de signal, procédé de traitement de signal, programme et corps mobile

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JP2003046422A (ja) * 2001-05-24 2003-02-14 Japan Telecom Holdings Co Ltd 基地局における移動通信方法、移動通信基地局装置および移動局装置
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JP2005341541A (ja) * 2004-04-28 2005-12-08 Sharp Corp アンテナ装置、アンテナシステム、及び放送受信装置
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JP2008160790A (ja) * 2006-06-08 2008-07-10 Advanex Inc 地上デジタル放送受信用アンテナ

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JP2000049672A (ja) * 1998-07-30 2000-02-18 Sharp Corp 無線送受信方法
JP2003046422A (ja) * 2001-05-24 2003-02-14 Japan Telecom Holdings Co Ltd 基地局における移動通信方法、移動通信基地局装置および移動局装置
JP2005123705A (ja) * 2003-10-14 2005-05-12 Sharp Corp テレビジョン受信機セット
JP2005311536A (ja) * 2004-04-19 2005-11-04 Toshiba Corp 無線装置
JP2005341541A (ja) * 2004-04-28 2005-12-08 Sharp Corp アンテナ装置、アンテナシステム、及び放送受信装置
JP2006101080A (ja) * 2004-09-29 2006-04-13 Brother Ind Ltd 無線タグ通信装置
JP2007214907A (ja) * 2006-02-09 2007-08-23 Sharp Corp ブースタ
JP2008160790A (ja) * 2006-06-08 2008-07-10 Advanex Inc 地上デジタル放送受信用アンテナ

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WO2018221188A1 (fr) * 2017-05-31 2018-12-06 株式会社オートネットワーク技術研究所 Dispositif d'antenne embarqué

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