Abstract: The present invention is provided with a high frequency module comprising a multilayered substrate, a power amplifier IC mounted on the upper surface of the multilayered substrate, first and second filters disposed substantially directly below the power amplifier IC in an inner layer of the multilayered substrate, and coupling-reducing ground vias disposed between the first filter and the second filter. At least the first filter is disposed substantially directly below the power amplifier IC. The coupling-reducing ground vias double as thermal vias for dissipating heat generated by the power amplifier IC.

Abstract: The present invention is provided with a high frequency module comprising a multilayered substrate, a power amplifier IC mounted on the upper surface of the multilayered substrate, first and second filters disposed substantially directly below the power amplifier IC in an inner layer of the multilayered substrate, and coupling-reducing ground vias disposed between the first filter and the second filter. At least the first filter is disposed substantially directly below the power amplifier IC. The coupling-reducing ground vias double as thermal vias for dissipating heat generated by the power amplifier IC.

Abstract: A method and system for detecting information relating to the location of a radio IC tag, using an interrogator unit. In one implementation of such method and system, a radio IC tag is securely attached to a fixed object, and a mobile object that has an interrogator unit moves into communication range with the radio IC tag. As the interrogator unit sends radio waves to the radio IC tag, the radio IC tag existing in the communication range sends reflected waves to the interrogator unit. When the interrogator unit receives the reflected waves, it detects and demodulates the reflected waves. The interrogator unit then reads information relating to the location of the radio IC tag as the information stored in the radio IC tag.

Abstract: It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable communication with a small fading effect.

Abstract: A method and system for detecting information relating to the location of a radio IC tag, using an interrogator unit. In one implementation of such method and system, a radio IC tag is securely attached to a fixed object, and a mobile object that has an interrogator unit moves into communication range with the radio IC tag. As the interrogator unit sends radio waves to the radio IC tag, the radio IC tag existing in the communication range sends reflected waves to the interrogator unit. When the interrogator unit receives the reflected waves, it detects and demodulates the reflected waves. The interrogator unit then reads information relating to the location of the radio IC tag as the information stored in the radio IC tag.

Abstract: A cordless telephone system including a cordless telephone handset arranged to store or wirelessly transmit a captured image without having a large capacity of secondary battery built-in. The cordless telephone handset includes an imaging section, a secondary battery, a wireless section for transmission of images captured by the imaging section, a storage section for storing images captured by the imaging section, and a power supply circuit that supplies (i) secondary battery power to the imaging section, wireless section, and storage section, and (ii) power required for recording or wireless-transmission of the captured image, to the imaging section, wireless section, and storage section during the time when the secondary battery is charged by a battery charger.

Abstract: It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable communication with a small fading effect.

Abstract: The present invention provides an antenna for radio communication equipment used as an antenna for portable radio equipment or the like which has been required to be downsized.

Abstract: To make it possible to easily carry out registration of a mutual ID number (ID) in a slave telephone set in cordless telephone device by only operating a switch or buttons, in the cordless telephone device according to the present invention, a sound generating element and a sound receiving element located closer and opposing to each other when the slave telephone set is set on a cradle of the master telephone set are provided in the master telephone set and the slave telephone set respectively, and ID signal sound is transferred between the two elements, so that even an ordinary user can carry out the ID registration requiring very complicated operations in the conventional technology without fail.

Abstract: A selective call signal detection circuit comprises a channel free/busy state detection circuit for scanning a plurality of communication channels to determine their respective free/busy states, a present-time channel free/busy state memory circuit for temporarily storing channel free/busy detection signals resulting from the aforementioned scanning of communication channels, a past-time channel free-busy state memory circuit for receiving into storage therein in the subsequent channel scanning cycle the channel free/busy detection signals of the previous scanning cycle formerly stored in the aforementioned present-time channel free/busy state memory circuit, and a comparison circuit for comparing the signals from the aforementioned present-time past-time channel free/busy state memory circuits thereby discriminating between a selective call signal addressed to a given receiving station and selective call signals addressed to other receiving stations.