Abstract: A high-frequency switch circuit common to a plurality of frequency bands includes a first high-frequency switch adapted to pass transmission signals and block received signals; and a demultiplexer. The high-frequency switch circuit passes one of the received signals of first and second frequency bands and blocks the other.

Abstract: An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced-balanced bandpass filters having different transmitting frequency bands, a first high-frequency switch being connected to an unbalanced port of the module, an unbalanced port of the first unbalanced-balanced bandpass filter, and an unbalanced port of the second unbalanced-balanced bandpass filter; a second high-frequency switch being connected to a first balanced port of the module, a first balanced port of the first unbalanced-balanced bandpass filter, and a first balanced port of the second unbalanced-balanced bandpass filter; a third high-frequency switch being connected to a second balanced port of the module, a second balanced port of the first unbalanced-balanced bandpass filter, and a second balanced port of the second unbalanced-balanced bandpass filter; and the first to third high-frequency switches being switched depending on a passing high-frequency signal,

Abstract: A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side circuit and a reception circuit in one of the plurality of transmitting and receiving systems, and a connection between the antenna side circuit and a reception circuit in the other of the plurality of transmitting and receiving systems, the high-frequency switch circuit comprising a first diode; a first distributed constant line; a second diode; a capacitor; a third diode; a second distributed constant line; and a fourth diode.

Abstract: A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and an antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side circuit and a reception circuit in one of the plurality of transmitting and receiving systems, and a connection between the antenna side circuit and a reception circuit in the other of the plurality of transmitting and receiving systems, the high-frequency switch circuit comprising a first diode, a second diode, and a distributed constant line, wherein a third diode is connected to the first and second diodes through the distributed constant line.

Abstract: A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a high frequency signal and a low frequency signal demultiplexed by the diplexer to a plurality of transmission/reception terminals, a first and a second low pass filter connected to a transmission path between the diplexer and the transmission terminal or between the first and the second switch circuit and the transmission terminal, and a notch filter provided between the diplexer and the first switch circuit or between the diplexer and the second switch circuit.

Abstract: A high-frequency module is connected to a transmitting circuit, a receiving circuit, and an antenna to control the connections between the transmitting circuit and the antenna and between the receiving circuit and the antenna. The module includes means for controlling transmitted signals, which includes a first phase-shift circuit and a high-frequency amplifier provided between the antenna and the transmitting circuit. The high-frequency amplifier and the first phase-shift circuit are integrated into a module composed of a plurality of dielectric layers.

Abstract: An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced-balanced bandpass filters having different transmitting frequency bands, a first high-frequency switch being connected to an unbalanced port of the module, an unbalanced port of the first unbalanced-balanced bandpass filter, and an unbalanced port of the second unbalanced-balanced bandpass filter; a second high-frequency switch being connected to a first balanced port of the module, a first balanced port of the first unbalanced-balanced bandpass filter, and a first balanced port of the second unbalanced-balanced bandpass filter; a third high-frequency switch being connected to a second balanced port of the module, a second balanced port of the first unbalanced-balanced bandpass filter, and a second balanced port of the second unbalanced-balanced bandpass filter; and the first to third high-frequency switches being switched depending on a passing high-frequency signal,

Abstract: A high-frequency switch circuit common to a plurality or frequency bands comprises a first high-frequency switch connected to first high-frequency signal input and output terminals and adapted to pass transmission signals of a first or a second frequency band and block received signals of the first and second frequency band; and a demultiplexer has a first high-frequency circuit which consists of a first phaser connected to the first terminal and a first bandpss filter succeeding to the first phaser, and a second high-frequency circuit which consists of a second phaser connected to the first terminal and a second bandpass filter succeeding to the second phaser.

Abstract: A high-frequency switch circuit common to a plurality of frequency bands includes a first high-frequency switch adapted to pass transmission signals and block received signals; and a demultiplexer. The high-frequency switch circuit passes one of the received signals of first and second frequency bands and blocks the other.

Abstract: A high-frequency switch module comprising one band-separating circuit and two switch circuits, the first switch circuit being connected to one circuit separated by the band-separating circuit, and the second switch circuit being connected to the other circuit thereof; the first switch circuit being a circuit for switching a transmission system and a reception system for a first transmitting and receiving system; and the second switch circuit being a circuit for switching a transmission system and a reception system for a second transmitting and receiving system and a transmission system and a reception system for a third transmitting and receiving system.

Abstract: A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side circuit and a reception circuit in one of the plurality of transmitting and receiving systems, and a connection between the antenna side circuit and a reception circuit in the other of the plurality of transmitting and receiving systems, the high-frequency switch circuit comprising a first diode; a first distributed constant line; a second diode; a capacitor; a third diode; a second distributed constant line; and a fourth diode.

Abstract: A high-frequency switch circuit is provided for switching a connection between a common transmission circuit and an antenna side circuit in a plurality of transmitting and receiving systems. The high-frequency switch includes a connection between the antenna side circuit and a reception circuit in one of the plurality of transmitting and receiving systems, and a connection between the antenna side circuit and a reception circuit in the other of the plurality of transmitting and receiving systems, the high-frequency switch circuit comprising a first diode, a second diode, and a distributed constant line, wherein a third diode is connected to the first and second diodes through the distributed constant line.

Abstract: A high-frequency module is connected to a transmitting circuit (TX), a receiving circuit (RX) and an antenna (ANT) to control the connections between the transmitting circuit (TX) and the antenna (ANT) and between the receiving circuit (RX) and the antenna (ANT). The module comprises means (2) for controlling transmitted signals, which includes a first phase-shift circuit (5) and a high-frequency amplifier (4) provided between the antenna (ANT) and the transmitting circuit (TX). The high-frequency amplifier (4) and the first phase-shift circuit (5) are integrated into a module composed of a plurality of dielectric layers.

Abstract: A high-frequency module is connected to a transmitting circuit (TX), a receiving circuit (RX) and an antenna (ANT) to control the connections between the transmitting circuit (TX) and the antenna (ANT) and between the receiving circuit (RX) and the antenna (ANT). The module comprises means (2) for controlling transmitted signals, which includes a first phase-shift circuit (5) and a high-frequency amplifier (4) provided between the antenna (ANT) and the transmitting circuit (TX). The high-frequency amplifier (4) and the first phase-shift circuit (5) are integrated into a module composed of a plurality of dielectric layers.

Abstract: A multi-band antenna switch circuit including a diplexer connected to an antenna terminal for demultiplexing signals of different passing bands, a first and a second switch circuit for switching a high frequency signal and a low frequency signal demultiplexed by the diplexer to a plurality of transmission/reception terminals, a first and a second low pass filter connected to a transmission path between the diplexer and the transmission terminal or between the first and the second switch circuit and the transmission terminal, and a notch filter provided between the diplexer and the first switch circuit or between the diplexer and the second switch circuit.

Abstract: A high-frequency switch circuit common to a plurality or frequency bands comprises a first high-frequency switch connected to first high-frequency signal input and output terminals and adapted to pass transmission signals of a first or a second frequency band and block received signals of the first and second frequency band; and a demultiplexer has a first high-frequency circuit which consists of a first phaser connected to the first terminal and a first bandpss filter succeeding to the first phaser, and a second high-frequency circuit which consists of a second phaser connected to the first terminal and a second bandpass filter succeeding to the second phaser.

Abstract: A high-frequency module is connected to a transmitting circuit (TX), a receiving circuit (RX) and an antenna (ANT) to control the connections between the transmitting circuit (TX) and the antenna (ANT) and between the receiving circuit (RX) and the antenna (ANT) The module comprises means (2) for controlling transmitted signals, which includes a first phase-shift circuit (5) and a high-frequency amplifier (4) provided between the antenna (ANT) and the transmitting circuit (TX). The high frequency amplifier (4) and the first phase-shift circuit (5) are integrated into a module composed of a plurality of dielectric layers.

Abstract: A multilayered frequency separator comprising a plurality of insulating layers, and having at least two notch circuits. The notch circuit is constituted by pattern electrodes formed on interfaces of each of the insulating layers which construct the multilayer structure, and comprises a capacitor component connected to an inductance component. The multilayered frequency separator is suitably used for branching the frequency bands for dual-band handy phone.

Abstract: A strip line-type high-frequency element constituted by a laminate including a first ground conductor electrode substrate 2; a substrate 3 having a first strip line electrode 3a of less than one turn having a through-hole round electrode 3e; a substrate 4 having a second strip line electrode 4a of one or more turns having a through-hole electrode 4f; a substrate 5 having a third strip line electrode 5a of one or more turns having a through-hole round electrode 5e; a substrate 6 having a fourth strip line electrode 6a of less than one turn having a through-hole electrode 6f; a second ground conductor electrode substrate 7; and a protective substrate 8, wherein the through-hole round electrode 3e of the first strip line electrode 3a is connected to the through-hole electrode 4f of the second strip line 4a to form a first line, and the through-hole round electrode 5e of the third strip line electrode 5a is connected to the through-hole electrode 6f of the fourth strip line 6a to form a second line, one of the fi