摘要:
An antenna device includes a round plug having a rotation mechanism section on one end thereof, where round plug is removably attached to a round jack arranged in an electronic apparatus; and a rod antenna element. In the antenna device, the rod antenna element is connected to the rotation mechanism section of the round plug and rotatable in a predetermined direction.
摘要:
A power supply device includes: a power supply unit configured to output the power of a mainframe; and a power transmission cable configured to supply the power output from the power supply unit to the mainframe via a connector; with the power transmission cable including a mainframe side high-frequency cutoff portion disposed between the power supply terminal of the connector, a power supply unit side high-frequency cutoff portion, which is disposed on the power supply unit side at a predetermined length from the connector, configured to restrict the length of a portion serving as an antenna, a first transmission line used for power supply to the mainframe via the mainframe side high-frequency cutoff portion, and a second transmission line to be connected to a tuner of the mainframe via the connector.
摘要:
A receiver apparatus includes: a main unit device; and a junction cable transmitting one or both of signal and electric power between the main unit device and an external device. The junction cable is a multicore coaxial cable having a plurality of core wire cables and a covered wire covering the plurality of core wire cables, and only the covered wire is cut locally so that the covered wire is divided into a main unit device-side covered wire and an external device-side covered wire. The main unit device transmits one or both of the signal and electric power by the core wire cable, and the main unit device-side covered wire or the core wire cable is connected to an antenna input port of a built-in tuner, and the main unit device receives a desired broadcast wave with the tuner using a high-frequency signal induced in the main unit device-side covered wire or the external device-side covered wire.
摘要:
An earphone antenna is provided in which two pairs of audio/high-frequency signal lines respectively corresponding to left and right earphone units are connected to a balun. The left and right earphone units are connected to terminals of the two pairs of audio/high-frequency signal lines remote from the balun via loading coils, respectively. The terminals of the two pairs of audio/high-frequency signal lines remote from the balun are further connected to each other by a pair of conductive lines via audio blocking means. The earphone antenna having such a structure can eliminate high-frequency adverse effects on a wireless device transmitted from a human body via an earphone.
摘要:
A reception device including a transmission part having transmission cables transmitting a signal and/or power of a main-body device, an antenna part provided along the transmission cables from main-body-device-side ends of the transmission cables to a point between the main-body-device-side ends and the other ends of the transmission cables so that a high-frequency-signal-transmission path is formed, a high-frequency-elimination circuit provided at the main-body-device-side ends, which eliminates entry of the high-frequency signal to the main-body device, and a tuner that connects one of ends of the antenna part, the end being provided on the main-body-device side, to an antenna-input terminal and that receives a broadcast wave falling within the first frequency band corresponding to the antenna part's length is provided. The other end of the antenna part is an open end.
摘要:
An earphone antenna is provided in which two pairs of audio/high-frequency signal lines respectively corresponding to left and right earphone units are connected to a balun. The left and right earphone units are connected to terminals of the two pairs of audio/high-frequency signal lines remote from the balun via loading coils, respectively. The terminals of the two pairs of audio/high-frequency signal lines remote from the balun are further connected to each other by a pair of conductive lines via audio blocking means. The earphone antenna having such a structure can eliminate high-frequency adverse effects on a wireless device transmitted from a human body via an earphone.
摘要:
An earphone antenna includes: earphone cords; an earphone portion; a coaxial cable; and a pin plug connector portion; wherein the earphone cords cooperate with a shielded line of the coaxial cable using a connection point with the coaxial cable as a feeding point to constitute an antenna for receiving RF signals; wherein conductor lines constituting a core wire of the coaxial cable form signal lines for transmitting audio signals and a ground line; and wherein the coaxial cable is connected with a separation-superimposition circuit portion which is mounted at a side of the pin plug connector portion or at a side of a wireless electronic device and acts to separate the RF signals and the audio signals and to superimpose the audio signals.
摘要:
In a liquid crystal TV receiver, when the pins (11 to 20) of the 10-pin connector plug (115) are soldered to the pins of the pin-plug connector (110) used for connection of the coaxial cable (60) used to transmit low-frequency and RF signals to a body (120) of the TV receiver, the conversion board is provided between the pins of the 10-pin connector plug (115) and pins of the pin-plug connector (110) and the rear-side pattern of the conversion board except for the pin insertion hole (10) in which the pin (20) to which the antenna signal line (9) is to be connected is to be inserted is formed as the grounding pattern to surround at least three sides of the pin insertion holes (134A, 135A and 132A) in which the audio signal pins (14 and 15) through which low-frequency signals such as audio signals are passed and the microphone pin (12) are to be inserted, respectively. Thus, the RF characteristic and suppression of audio noises are considerably improved.
摘要:
An earphone antenna includes an earphone cable having first signal lines; a shielded cable including a coaxial cable, a second signal line for audio signals and a grounding wire, the coaxial cable having a central conductor passing high frequency signals surrounded by an insulator and further surrounded by a first shield wire, the coaxial cable, the second signal line, and the grounding wire collectively being surrounded by a second shield wire; a multipin connector arranged on one end of the shielded cable an adapted to electrically connect the shielded cable to a radio apparatus; and a connection block interconnecting the other end of the shielded cable and the earphone cable. The connection block includes a balun for carrying out impedance and balanced/unbalanced mode transformation, and an audio signal transmission path formed by connecting the second signal line and the grounding wire, respectively, to the pair of first signal lines via a high frequency choke exhibiting low impedance for audio signals and high impedance for high frequency signals. By connecting the central conductor of the coaxial cable and the first shield wire to an unbalanced part of the balun, connecting the pair of first signal lines to one end of a balanced part of the balun via a capacitor exhibiting high impedance for audio signals and low impedance for high frequency signals, and connecting the other end of the balanced part of the balun to the second shield wire, a dipole antenna is formed by the earphone cable and the second shield wire.