Patent application number | Description | Published |
20080212552 | Multi-Band High Frequency Circuit, Multi-Band High-Frequency Component and Multi-Band Communications Apparatus - A high-frequency circuit comprising a switch circuit for properly switching the connection of an antenna terminal and four input/output terminals; a first received-signal output terminal being connected to a receiving circuit of a first communications system via a filter circuit; a second received-signal output terminal being connected to a receiving circuit of a second communications system via a filter circuit; a first transmitting-signal input terminal being connected to a transmitting circuit of a first communications system; and a second transmitting-signal input terminal being connected to a transmitting circuit of a second communications system via a power amplifier circuit, the high-frequency circuit further comprising a bandpass filter circuit disposed in any one or more paths between the antennas and the transmitting-signal input or received-signal output; and a detection circuit having a voltage detection terminal for monitoring the output power of the power amplifier circuits. | 09-04-2008 |
20090017772 | MULTIBAND HIGH-FREQUENCY CIRCUIT, MULTIBAND HIGH-FREQUENCY CIRCUIT DEVICE AND MULTIBAND COMMUNICATIONS APPARATUS COMPRISING SAME - A multiband high-frequency circuit comprising a first switch SPDT | 01-15-2009 |
20090201099 | MULTI-BAND HIGH-FREQUENCY CIRCUIT, MULTI-BAND HIGH-FREQUENCY CIRCUIT COMPONENT AND MULTI-BAND COMMUNICATION APPARATUS USING SAME - A multi-band high-frequency circuit for performing wireless communications among pluralities of communication systems having different communication frequencies, comprising a high-frequency switch circuit comprising switching elements for switching the connection of pluralities of multi-band antennas to transmitting circuits and receiving circuits; a first diplexer circuit disposed between the high-frequency switch circuit and transmitting circuits for branching a high-frequency signal into frequency bands of the communication systems; a second diplexer circuit disposed between the high-frequency switch circuit and receiving circuits for branching a high-frequency signal into frequency bands of the communication systems; the first and second diplexer circuits each comprising a lower-frequency filter circuit and a higher-frequency filter circuit, a bandpass filter circuit being used as the lower-frequency filter circuit in the second diplexer circuit, or disposed between the lower-frequency filter circuit in the second diplexer circuit and the receiving circuit, the high-frequency switch circuit comprising first to fourth ports, the first port being connected to a first multi-band antenna, the second port being connected to a second multi-band antenna, the third port being connected to the first diplexer circuit, and the fourth port being connected to the second diplexer circuit; and the switching elements being controlled in an ON or OFF state to select a multi-band antenna for performing wireless communications and to switch the connection of the selected multi-band antenna to the transmitting circuit or the receiving circuit. | 08-13-2009 |
20090206948 | MULTI-BAND HIGH-FREQUENCY CIRCUIT, MULTI-BAND HIGH FREQUENCY CIRCUIT COMPONENT AND MULTI-BAND COMMUNICATION APPARATUS USING SAME - A multi-band high-frequency circuit for performing wireless communications among pluralities of communication systems having different communication frequencies, comprising a high-frequency switch circuit comprising switching elements for switching the connection of pluralities of multi-band antennas to transmitting circuits and receiving circuits; a first diplexer circuit disposed between the high-frequency switch circuit and transmitting circuits for branching a high-frequency signal into frequency bands of the communication systems; a second diplexer circuit disposed between the high-frequency switch circuit and receiving circuits for branching a high-frequency signal into frequency bands of the communication systems; the first and second diplexer circuits each comprising a lower-frequency filter circuit and a higher-frequency filter circuit, a bandpass filter circuit being used as the lower-frequency filter circuit in the second diplexer circuit, or disposed between the lower-frequency filter circuit in the second diplexer circuit and the receiving circuit, the high-frequency switch circuit comprising first to fourth ports, the first port being connected to a first multi-band antenna, the second port being connected to a second multi-band antenna, the third port being connected to the first diplexer circuit, and the fourth port being connected to the second diplexer circuit; and the switching elements being controlled in an ON or OFF state to select a multi-band antenna for performing wireless communications and to switch the connection of the selected multi-band antenna to the transmitting circuit or the receiving circuit. | 08-20-2009 |
20090207764 | HIGH-FREQUENCY CIRCUIT, HIGH-FREQUENCY DEVICE AND COMMUNICATIONS APPARATUS - A high-frequency circuit for wireless communications selectively using a first frequency band and a second frequency band lower than the first frequency band, comprising an antenna terminal; first and second transmission terminals to which transmitting signals in the first and second frequency bands are input; first and second receiving terminals from which received signals in the first and second frequency bands are output; a diplexer circuit for branching a first-frequency-band-signal path and a second-frequency-band-signal path; a switch circuit for switching a path for a transmitting signal and a path for a received signal; a low-noise amplifier circuit disposed between the switch circuit and the second receiving terminal for amplifying a received signal in the second frequency band; and first and second filter circuits disposed between the antenna terminal and the low-noise amplifier circuit in this order from the antenna terminal, both filter circuits passing a received signal in the second frequency band but blocking a frequency band lower than the second frequency band, and the band blocked by the first filter circuit being lower than the band blocked by the second filter circuit. | 08-20-2009 |
20110096705 | MULTIBAND HIGH-FREQUENCY CIRCUIT, MULTIBAND HIGH-FREQUENCY CIRCUIT DEVICE AND MULTIBAND COMMUNICATIONS APPARATUS COMPRISING SAME - A multiband high-frequency circuit comprising a first switch SPDT | 04-28-2011 |
Patent application number | Description | Published |
20100062727 | HIGH-FREQUENCY DEVICE AND COMMUNICATIONS APPARATUS - A high-frequency device having high-frequency-signal-treating circuits in and on a laminate substrate comprising pluralities of dielectric layers having conductor patterns, the high-frequency-signal-treating circuits having amplifier circuits and switch circuits; terminals including input and output terminals of high-frequency signals, the power supply terminals of the amplifier circuits and the power supply terminals of the switch circuits being formed on one main surface of the laminate substrate; power supply lines each having one end connected to each of the power supply terminals of the amplifier circuits and power supply lines each having one end connected to each of the power supply terminals of the switch circuits being formed on one dielectric layer to constitute a power supply line layer; a first ground electrode being arranged on the side of the main surface with respect to the power supply line layer, the first ground electrode overlapping at least part of the power supply lines in a lamination direction; a second ground electrode being arranged on the opposite side of the first ground electrode with respect to the power supply line layer, the second ground electrode overlapping at least part of the power supply lines in a lamination direction; and the high-frequency-signal-treating circuits being arranged on the opposite side of the power supply line layer with respect to the second ground electrode. | 03-11-2010 |
20100073108 | LAMINATED BANDPASS FILTER, HIGH-FREQUENCY COMPONENT AND COMMUNICATIONS APPARATUS COMPRISING THEM - A three-stage-resonator, laminated bandpass filter comprising electromagnetically coupled first to third resonator electrodes, adjacent first and second resonator electrodes and a third resonator electrode being different in a grounding direction, and a coupling-capacitor electrode extending over resonator electrodes. | 03-25-2010 |
20100157860 | HIGH-FREQUENCY CIRCUIT DEVICE, AND COMMUNICATIONS APPARATUS COMPRISING SAME - A high-frequency circuit device comprising at least first and second antenna terminals, at least first and second transmitting terminals for a first communications system, at least first and second receiving terminals for a first communications system, two or more switch circuits, and two or more filter circuits, the first transmitting terminal for the first communications system being connectable to the first antenna terminal, the second transmitting terminal for the first communications system being connectable to the second antenna terminal, the first receiving terminal for the first communications system being connectable to the first antenna terminal, and the second receiving terminal for the first communications system being connectable to the second antenna terminal. | 06-24-2010 |
20110110452 | HIGH-FREQUENCY CIRCUIT, HIGH-FREQUENCY DEVICE, AND COMMUNICATIONS APPARATUS - A high-frequency circuit comprising first and second antenna terminals, a transmitting terminal and first and second receiving terminals for first and second communications systems, and first and second switch circuits each having a common terminal and at least first and second switching terminals; the first antenna terminal being connected to a common terminal of the first switch circuit, the transmitting terminal for the first communications system being connected to the first switching terminal of the first switch circuit, the second antenna terminal being connected to a common terminal of the second switch circuit, the transmitting terminal for the second communications system being connected to the first switching terminal of the second switch circuit, each first receiving terminal for the first and second communications systems being connected to the second switching terminal of the first switch circuit via a first receiving-side multiplexer circuit, each second receiving terminal for the first and second communications systems being connected to the second switching terminal of the second switch circuit via a second receiving-side multiplexer circuit. | 05-12-2011 |