Abstract: According to one embodiment, an antenna apparatus includes a plurality of amplifier circuits, a common drain control circuit, a gate control circuits, and an antenna controller. The common drain control circuit constitutes a control circuit common to the plurality of amplifier circuits, and controls a drain voltage of a field-effect transistor included in each of the amplifier circuits. The gate control circuits are provided for each amplifier circuit, and controls a gate voltage of the field-effect transistor. The antenna controller controls the common drain control circuit and the gate control circuits, and selectively operates the plurality of amplifier circuits by controlling an output of the gate voltage prior to the drain voltage.

Abstract: A circuit board device of the embodiment includes: a mount board having an electronic component and a printed circuit board having at least one surface where the electronic component is mounted; a heat path arranged to a position facing the mount surface of the mount board, a sheet arranged on the mount surface, and a resin portion arranged between the sheet and the heat path. A cavity surrounded by the sheet and the mount surface is formed in a step portion between the electronic component and the printed circuit board.

Abstract: According to one embodiment, an antenna apparatus includes a plurality of amplifier circuits, a common drain control circuit, a gate control circuits, and an antenna controller. The common drain control circuit constitutes a control circuit common to the plurality of amplifier circuits, and controls a drain voltage of a field-effect transistor included in each of the amplifier circuits. The gate control circuits are provided for each amplifier circuit, and controls a gate voltage of the field-effect transistor. The antenna controller controls the common drain control circuit and the gate control circuits, and selectively operates the plurality of amplifier circuits by controlling an output of the gate voltage prior to the drain voltage.

Abstract: An antenna unit includes an antenna substrate, a reflective plate, a receiver board, a transmitter board, a cooling plate and a connection interface. The reflective plate is disposed on an antenna element forming surface of the antenna substrate. The receiver board is disposed on a surface of the antenna substrate opposite to a surface facing the reflective plate, and has a receiver module to process a received signal. The transmitter board is disposed substantially parallel to a surface of the receiver board opposite to a surface facing the antenna substrate, and has a transmitter module to process a transmission signal. The cooling plate is disposed on a surface of the transmitter board opposite to the surface facing the receiver board and is configured to cool down heat generated by the transmitter module. The connection interface connects the transmitter board and the receiver board to transmit a signal therebetween.

Abstract: An antenna unit includes an antenna substrate, a reflective plate, a receiver board, a transmitter board, a cooling plate and a connection interface. The reflective plate is disposed on an antenna element forming surface of the antenna substrate. The receiver board is disposed on a surface of the antenna substrate opposite to a surface facing the reflective plate, and has a receiver module to process a received signal . The transmitter board is disposed substantially parallel to a surface of the receiver board opposite to a surface facing the antenna substrate, and has a transmitter module to process a transmission signal. The cooling plate is disposed on a surface of the transmitter board opposite to the surface facing the receiver board and is configured to cool down heat generated by the transmitter module. The connection interface connects the transmitter board and the receiver board to transmit a signal therebetween.

Abstract: A detection method that can measure a plurality of measured substances in a fluid test sample at the same time, easily perform qualitative analysis and quantitative analysis, and reduce measurement errors between excitation energies of the measured substances, and a microchemical system using the detection method. A probe light with a wavelength of 780 nm CW-oscillated from a probe light source 16 is irradiated on measured substances in a minute channel 1, excitation lights with wavelengths of 658 nm and 532 nm, respectively, are modulated into plurality of flashing excitation lights with frequencies 1 kHz and 1.2 kHz and a duty factor of 50% and irradiated on the measured substances in the minute channel 1, the probe light refracted by a thermal lens formed by the irradiated flashing excitation lights is detected with respect to individual frequency components at the same time, and a signal of the detected probe light is guided from a PD 21 to a PC 24 as a signal processing apparatus via an IV amplifier 22.