Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Optis Wireless Technology, LLC

Panasonic Intellectual Property Corporation of America

Kentaro Miyano

Katsuaki Abe

Akihiko Matsuoka

Yoichi Nakagawa

Yoshifumi Hosokawa

Takaaki Kishigami

Noriaki Saito

Masaki Nobuoka

Naoya Ryoki

Yasuyuki Naito

Yoshio Koyanagi

Akihiko Ishibashi

Masahiro Mimura

Tomoya Urushihara

Makoto Hasegawa

Takenori Sakamoto

Takehiro Asahi

Junji Sato

Takashi Fukagawa

Hiroshi Ohno

Ippei Kanno

Akio Ueta

Satoshi Tsukamoto

Kiyomichi Araki

Youichi Nakagawa

Kyohei Fujimoto

Naoto Yanagita

A ScAlMgOmonocrystalline substrate that is highly cleavable and that does not easily cause cracking in the GaN film id grown on the substrate and a method for manufacturing such a ScAlMgOmonocrystalline substrate are provided. The ScAlMgOmonocrystalline substrate has a crystal oxygen concentration of 57 atom % or less as measured by inductively coupled plasma atomic emission spectroscopy analysis.

ScAlMgO4 monocrystalline substrate, and method of manufacture thereof

A RAMOsubstrate that does not easily crack during or after the formation of group III nitride crystal includes a single crystal represented by general formula RAMO(wherein R represents one or more trivalent elements selected from the group consisting of Sc, In, Y, and lanthanoid elements, A represents one or more trivalent elements selected from the group consisting of Fe(III), Ga, and Al, and M represents one or more divalent elements selected from the group consisting of Mg, Mn, Fe(II), Co, Cu, Zn, and Cd). The RAMOsubstrate has a crystal plane with a curvature radius r of 52 m or more, and a square value of correlation coefficient &#x3c1; of 0.81 or more. The curvature radius r is calculated as an absolute value from X-ray peak position &#x3c9;i and measurement position Xi after the measurements of X-ray peak positions &#x3c9;i at a plurality of positions Xi lying on a straight line passing through the center of the RAMOsubstrate. The correlation coefficient &#x3c1; is a measure of correlation between &#x3c9; and measurement position Xi.

[object Object]

A wavelength conversion device including a cavity that includes an RAMOcrystal having a single crystal represented by a first general formula of RAMO, a laser crystal, and a mirror, in which in the first general formula, R represents one or a plurality of trivalent elements selected from the group consisting of Sc, In, Y, and lanthanoid elements, A represents one or a plurality of trivalent elements selected from the group consisting of Fe (III), Ga, and Al, and M represents one or a plurality of divalent elements selected from the group consisting of Mg, Mn, Fe (II), Co, Cu, Zn, and Cd.

Wavelength conversion device

Provided herein is a wavelength converter capable of producing shorter wavelengths by wavelength conversion than in related art. A wavelength converter of the present disclosure includes: a first layer formed of a single crystal represented by general formula RAMO; and a second layer formed of a single crystal represented by the general formula RAMOand having a direction of polarization reversed 180&#xb0; from a direction of polarization of the first layer, wherein, in the general formula, R represents one or more trivalent elements selected from the group consisting of Sc, In, Y, and a lanthanoid element, A represents one or more trivalent elements selected from the group consisting of Fe(III), Ga, and Al, and M represents one or more divalent elements selected from the group consisting of Mg, Mn, Fe(II), Co, Cu, Zn, and Cd.

Wavelength converter

A radio communication apparatus capable of alleviating a burden in setting a transmission format and suppressing increases in the scale of the apparatus. In this apparatus, space multiplexing adaptability detection section detects space multiplexing transmission adaptability for divided bands obtained by dividing a communication band to which Ns subcarrier signals belong in multicarrier transmission and to which a plurality of subcarrier signals belong, and outputs the detection results. Transmission format setting section sets a transmission format when carrying out radio transmission based on the detection results from space multiplexing adaptability detection section.

Transmission apparatus and transmission method using a plurality of divided frequency bands in a communication band

An object is to provide a high-quality ScAlMgOsingle crystal and a device. The ScAlMgOsingle crystal includes Sc, Al, Mg, and O, in which the atomic percentage ratio of Mg to Al, Mg/Al (atom %/atom %), as measured by an inductively coupled plasma emission spectrometric method, is more than 1 and less than 1.1.

ScAlMgO4 single crystal and device

A ScAlMgOsingle crystal substrate having less collapse of crystal orientation, and a method for producing the single crystal substrate. A ScAlMgOsingle crystal substrate is provided, wherein, when a center of the substrate is designated as coordinates (0,0) and a measurement beam width is set to 1 [mm]&#xd7;7 [mm] to conduct analysis according to an X-ray diffraction method at respective coordinate positions of (x,0) to (x,0) at an interval of 1 [mm] in an x-axis direction and (0,y) to (0,y) at an interval of 1 mm in a y-axis direction, wherein m and n are each an integer falling within the range so that the measurement beam is not stuck out from the substrate, a worst value of a full width at half maximum of a rocking curve at each of the coordinate positions is less than 20 [sec.].

ScAIMgOsingle crystal substrate and method for producing the same

A radio communication apparatus capable of alleviating a burden in setting a transmission format and suppressing increases in the scale of the apparatus. In this apparatus, space multiplexing adaptability detection section () detects space multiplexing transmission adaptability for divided bands (DB-to DB-Nd) obtained by dividing a communication band to which Ns subcarrier signals belong in multicarrier transmission and to which a plurality of subcarrier signals belong, and outputs the detection results (#1 to #Nd). Transmission format setting section () sets a transmission format when carrying out radio transmission based on the detection results (#1 to #Nd) from space multiplexing adaptability detection section ().

An RF receiver includes a variable gain amplifier which amplifies a received RF signal based on a gain control signal, a peak detector which determines a peak value of the amplified signal, a mixer which downconverts the amplified signal to a downconverted signal, and a control unit which determines whether or not an interfering signal other than an adjacent channel interfering signal is received. If the control unit determines that the interfering signal other than the adjacent channel interfering signal is received, the control unit generates the gain control signal so that the range of the peak value is a first range; otherwise, the control unit generates the gain control signal so that the range of the peak value is a second range. The upper and lower bounds of the second range are lower than the upper and lower bounds of the first range, respectively.

Radio frequency receiver and radio receiver

A sampling filter device wherein the filter characteristic is variable without using a control signal of a complicated waveform is provided. A sampling filter devicehas integration capacitorsand, an integration time adjustment section, and a plurality of switches, and. Input current is integrated in different time duration with one clock and is stored in the integration capacitorsandand charges stored in the integration capacitor from several clocks before to one clock before are added and the result is output. When charge is stored in the integration capacitorsandwith each clock, the integration time duration is changed, whereby it is made possible to weight and add output charge and the filter characteristic changes.

Sampling filter device

A multimode wireless communication apparatus that supports plural wireless communication systems and switches wireless communication systems to communicate. The apparatus includes a signal processor capable of switching wireless communication systems by plural manners; and a controller that directs to the signal processor a combination of manners of switching wireless communication systems according to a communication environment. The signal processor switches wireless communication systems according to the combination of manners of switching wireless communication systems directed from the controller.

Multimode wireless communication apparatus and wireless communication method

A wireless terminal involving small redundancy that can be reconfigured to a configuration compatible with a plurality of systems using the hardware resources compatible with one system is provided. A wireless terminalA is compatible with an OFCDM system and has a signal processing section, a synchronous detection section, etc. The signal processing sectionperforms Fourier transform when the wireless terminal is compatible with the OFCDM system; the signal processing sectionperforms Fourier transform and inverse Fourier transform compatible with an OFDM system when the wireless terminal is compatible with the OFDM system and a CDMA system. When the wireless terminal is compatible with the OFCDM system, the synchronous detection sectionuses taps used in the systems when the wireless terminal is compatible with the OFDM system and the CDMA system. When the wireless terminalA is placed out of the area in the OFCDM system, it is switched to a configuration compatible with the OFDM system and the CDMA system.

Wireless terminal and communication system switching method

A radio communication apparatus capable of alleviating a burden in setting a transmission format and suppressing increases in the scale of the apparatus. In this apparatus, space multiplexing adaptability detection section () detects space multiplexing transmission adaptability for divided bands (DB-to DB-Nd) obtained by dividing a communication band to which Ns subcarrier signals belong in multicarrier transmission and to which a plurality of subcarrier signals belong, and outputs the detection results (#to #Nd). Transmission format setting section () sets a transmission format when carrying out radio transmission based on the detection results (#to #Nd) from space multiplexing adaptability detection section ().

Growing community of inventors

Osaka, Japan

Kentaro Miyano