摘要:
An earphone antenna has an earphone unit including an earphone, an earphone cable for supplying audio signals to the earphone, and a first pin jack connector portion on one end of the earphone cable, the earphone cable functioning as an antenna wire. The earphone antenna further includes a shielded cable having a coaxial core, an insulation-covered signal wire for audio signals, and a ground wire. The coaxial core has a center conductor for transmitting high frequency signals surrounded by an insulator and further surrounded by a shield wire. A multi-pole connector arranged on one end of the shielded cable is adapted to electrically connect the shielded cable to an electronic apparatus. A connection block connects the other end of the shielded cable to the earphone unit, the connection block including a circuit device for separating audio signals and high frequency signals, and a second pin jack connector portion for removably receiving the first pin jack connector portion to removably connect the earphone unit to the connection block.
摘要:
An earphone antenna in which a balun is connected to one side and the other side having an audio/high-frequency dual-function signal connecting the earphone unit via a loading coil and wireless equipment connected to the balun, the loading coil selecting low impedance for fundamental frequency and selecting to obtain high impedance for higher frequencies, in order to integrate earphone and antenna.
摘要:
An earphone antenna includes an audio signal transmission path formed by connecting a first shield wire of a coaxial cable to a ground, connecting a central conductor of the coaxial cable to a pair of first signal lines of an earphone cable via a capacitor which exhibits high impedance in a frequency range of audio signals and low impedance in a frequency range of high frequency signals, and connecting a second signal line and a grounding wire, respectively, to the pair of first signal lines via a high frequency choke which exhibits low impedance in the frequency range of audio signals and high impedance in the frequency range of high frequency signals. Connecting the second shield wire to the ground causes formation of a sleeve antenna by the earphone cable and the second shield wire.
摘要:
An antenna is realized by a simple mechanism without use of a dedicated antenna element. An antenna includes a first conductor 2b (2d) that has a first line length from a start point 4 to a folded point 3; and a second conductor 2b (2d) that has a second line length in a direction from the folded point 3 to the start point 4 and is electrically connected to the first conductor at the folded point 3. A first received signal with a first frequency is received with a first antenna length including both the first line length and the second line length. A second received signal with a second frequency is received with a second antenna length including only one of the first line length and the second line length.
摘要:
An antenna device receives broadcast waves with a sufficiently wide frequency band and sufficient gain by connecting wire material. The antenna device includes a power supply cord which can transmit power, a connecting portion, a high-frequency signal cable for extracting a high-frequency signal from the connecting portion, and a high-frequency blocking portion disposed in two places in the length direction of the power supply cord.
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:
A connecting device includes an audio signal plug to which an audio signal transmission cable including at least three lines can be connected, the audio signal plug including at least three plug terminals. The three plug terminals of the audio signal plug include first, second, and third plug terminals. The first plug terminal functions as a signal line in which a high-frequency signal is superimposed on an audio signal. The second plug terminal different from the first plug terminal functions as a ground for low-frequency and high-frequency. The third plug terminal different from the first and second plug terminals functions as a ground by capacitive coupling for the high-frequency, and has a function for transmitting a signal different from a signal of the first plug terminal for the low-frequency.
摘要:
A shielded cable includes an inner conductor, a first insulator, a first outer conductor, a second insulator, and a second outer conductor, which are coaxially disposed in this order from an inner side, and has an outer circumference coated by an insulation sheath.
摘要:
A connecting device includes an audio signal plug to which an audio signal transmission cable including at least three lines can be connected, the audio signal plug including at least three plug terminals. The three plug terminals of the audio signal plug include first, second, and third plug terminals. The first plug terminal functions as a signal line in which a high-frequency signal is superimposed on an audio signal. The second plug terminal different from the first plug terminal functions as a ground for low-frequency and high-frequency. The third plug terminal different from the first and second plug terminals functions as a ground by capacitive coupling for the high-frequency, and has a function for transmitting a signal different from a signal of the first plug terminal for the low-frequency.
摘要:
An antenna device includes: a shielded cable having a first connection portion on one end side and a second connection portion on the other end side; and an antenna element which is connected to the second connection portion of the shielded cable, wherein the shielded cable includes an inner conductor, a first insulator, a first outer conductor, a second insulator, and a second outer conductor, which are coaxially disposed in this order from an inner side, and is covered at its outer circumference by an insulation sheath, the first connection portion of the shielded cable is formed such that the inner conductor is supplied with power and the first outer conductor is connected to a ground, and in the second connection portion of the shielded cable, the first outer conductor is connected to the antenna element, and the inner conductor is connected to the second outer conductor.