Abstract: A radar apparatus according to an embodiment of the present invention includes an oversampler, a weight vector calculator, a meteorological parameter calculator, an error influence degree calculator, and an error reducer. The oversampler performs oversampling on a received signal to acquire a sampling signal. The weight vector calculator calculates a weight vector based on the sampling signal and a waveform information matrix. The meteorological parameter calculator calculates an estimated value of a meteorological parameter on an observation target based on the vector and the matrix. The error influence degree calculator selects a first observation target considering an estimated error included in the estimated value, or an error influence degree based on the estimated error. The error reducer subtracts an estimated error that the first observation target gives to an estimated value of a meteorological parameter on a second observation target, from the estimated value on the second observation target.

Abstract: A signal processing device in accordance with one aspect of the present invention includes a first signal processor, a second signal processor, and a signal generator. The first signal processor is configured to generate a first signal by signal processing based on a first window function, a reference signal, and a reception signal. The second signal processor is configured to generate a second signal by signal processing based on a second window function, the reference signal, and the reception signal. The signal generator is configured to generate a third signal based on at least the first signal and the second signal.

Abstract: According to one embodiment, there is provided a beam information generating device including: a distance calculator that calculates distances, from a receiver, along a plurality of reception beams formed by the receiver to a transmission beam, based on transmission beam information; and a beam width calculator that calculates beam widths of the reception beams based on the distances calculated by the distance calculator so as to restrain variations in volume enclosed by the transmission beam and the reception beams.

Abstract: According to an embodiment, a weather radar apparatus includes the following elements. The feature quantity calculator calculates, based on the weather information for the targets in an observation range, a feature quantity of each of the targets. The allocator performs transmit allocation in pulse unit or pulse pair unit to the targets based on the feature quantity. The allocation halt instruction unit instructs the allocator to halt transmit allocation to a target satisfying a certain condition. The beam controller generates a control signal to control a beam direction and transmit timing based on a result of the transmit allocation. The transmit signal generator generates a transmit signal based on the control signal. The array antenna transmits the transmit signal.

Abstract: According to one embodiment, there is provided a beam information generating device including: a distance calculator that calculates distances, from a receiver, along a plurality of reception beams formed by the receiver to a transmission beam, based on transmission beam information; and a beam width calculator that calculates beam widths of the reception beams based on the distances calculated by the distance calculator so as to restrain variations in volume enclosed by the transmission beam and the reception beams.

Abstract: The present invention includes: a transmitter/receiver 20 that transmits an FMCW modulated sweep signal at least twice; an FFT unit 32 that performs Fast Fourier Transform on the at least two sweep signals received in response to the transmission from the transmitter/receiver; and an MRAV processor 35a that calculates ranges and velocities of multiple targets by calculating beat frequencies corresponding to at least two sweeps by the transmitter/receiver based on the at least two sweep signals obtained by the Fourier Transform performed by the FFT unit, calculating velocities based on a frequency difference and a time difference of the calculated beat frequencies, and calculating ranges based on the calculated velocities and beat frequencies.

Abstract: The present invention includes: an antenna 10 including an element 11a for use in both transmission and reception that is divided into a first transmission/reception element and a second transmission/reception element, and an element 12a for reception only that is divided into a first only-reception element and a second only-reception element; a beam shaping unit 34 that divides an angle region to be observed into a plurality of regions, and forms transmission beams by using the respective elements of the antenna so that the divided angle regions are covered by the transmission beams, and in reception, sets aimed beam direction of each element of the antenna to be the same as that of the first transmission/reception element, and that of the second transmission/reception element, forms phase monopulse beam of ? and ? by using the first transmission/reception element and the first only-reception element, and the second transmission/reception element and the second only-reception element to cover each of the plu

Abstract: The present invention includes a transmitter/receiver 20 that transmits/receives an FMCW based sweep signal, a velocity grouping unit 36 that performs grouping of a target for each velocity range by a velocity of the target calculated based on the sweep signal from the transmitter/receiver, and a correlation tracking unit 37 that performs correlation tracking for each velocity group which is grouped by the velocity grouping unit.

Abstract: A radio transmitting apparatus with a plurality of transmission units comprises a calculation unit configured to calculate, based on a data length of a transmission signal including a control signal and a data signal following the control signal, a transmission time required for transmitting the transmission signal and one or more transmission times corresponding to the number of one or more divisions of the transmission signal, and a signal generation unit configured to generate a signal supplied to at least one of the transmission units, using the transmission signal corresponding to a minimum transmission time of the one or more transmission times or the divisions of the transmission signal which correspond to the minimum transmission time.

Abstract: A highly reliable monolithic ceramic capacitor which has no structural defect, e.g. peeling, and which is not susceptible to water from the outside and a method for manufacturing the same are provided. A lead portion of an internal electrode is configured to have a shape provided with a taper-shaped portion in which the width gradually decreases with increasing proximity to the end surface of a ceramic element, and the shape of the end portion opposite to the lead portion of the internal electrode is adjusted to be substantially rectangular. Regarding a pair of internal electrodes facing each other with the ceramic layer therebetween, the internal electrodes are laminated while the positions thereof are displaced with respect to each other in order that a corner portion in the substantially rectangular portion of one internal electrode are located in the vicinity of, but outside the taper-shaped portion of the other internal electrode.

Abstract: A highly reliable monolithic ceramic capacitor which has no structural defect, e.g. peeling, and which is not susceptible to water from the outside and a method for manufacturing the same are provided. A lead portion of an internal electrode is configured to have a shape provided with a taper-shaped portion in which the width gradually decreases with increasing proximity to the end surface of a ceramic element, and the shape of the end portion opposite to the lead portion of the internal electrode is adjusted to be substantially rectangular. Regarding a pair of internal electrodes facing each other with the ceramic layer therebetween, the internal electrodes are laminated while the positions thereof are displaced with respect to each other in order that a corner portion in the substantially rectangular portion of one internal electrode are located in the vicinity of, but outside the taper-shaped portion of the other internal electrode.

Abstract: A monolithic ceramic capacitor includes a sintered ceramic compact having a core-shell structure, a plurality of internal electrodes arranged in and separated by the ceramic sintered compact so as to overlap in the thickness direction, and a plurality of external electrodes formed on the outermost faces of the ceramic sintered compact. In the core-shell structure, cores are composed of a particulate dielectric ceramic, and shells are formed on the cores and are composed of a material having a dielectric constant lower than that of the dielectric ceramic. The area ratio of the cores to the shells lies in a range of 7:3 to 3:7 in a cross-section of the sintered ceramic compact in an arbitrary direction. The core-shell structure can achieve further miniaturization and higher capacitance of the monolithic ceramic capacitor, in addition to superior temperature characteristics.

Abstract: The present invention provides a laminated ceramic capacitor having good temperature characteristics, and suitable for attaining miniaturization, large capacitance and low production cost besides having high reliability in the high temperature load test, wherein a plurality of inner electrodes are formed in a ceramic sintered body comprising a reduction resistant dielectric ceramic in which grains having a core-shell structure and grains having a homogeneous structure are mixed together, and wherein outer electrodes are formed on the outer surfaces of the ceramic sintered body, the area ratio between the total area of the grains having the core-shell structure and the total area of the grains having the homogeneous structure being adjusted within a the range of about 2:8 to 4:6 when a cross section is observed along an arbitrary direction of the ceramic sintered body.

Abstract: There is provided a highly reliable laminated ceramic electronic part in which delamination or crack can be suppressed from occurring during a sintering process even if a number of lamination of internal electrodes is increased and a thickness of the ceramic layer is reduced and which excels in thermal shock resistance. The laminated ceramic electronic part is constructed so as to satisfy the following requirements of that a thickness of the ceramic layer is 10 .mu.m or less; a number of lamination of the internal electrodes is 200 or more; a ratio of a thickness of the internal electrode to the thickness of the ceramic layer (thickness of internal electrode/thickness of ceramic layer) is 0.10 to 0.40; and a ratio of a volume of the internal electrode to a volume of the ceramic element (volume of internal electrodes/volume of ceramic element) is 0.10 to 0.30.

Abstract: An electronic apparatus system comprises an electronic apparatus body such as a portable computer, and an extension station for use in extending the functions of the electronic apparatus body. The extension station has a mount portion on which the electronic apparatus body is detachably mounted, a device storage section in which an extension device for extending the functions of the electronic apparatus body is removably stored, and an ejector for discharging the extension device from the device storage section. The ejector has an eject lever manually operable at the time of discharging the extension device. The eject lever has an operation section exposed to the mount portion. The extension station includes a rotatable cover which is held in a closed position by an extension portion of the cover which extends toward the mount portion of the extension body. The extension portion of the cover is located under the portable computer when the portable computer is mounted on the mounting portion.

Abstract: A portable electronic apparatus has a box-like case. The case includes a peripheral surface having a card insertion port formed therein. A circuit board is housed in the case. First and second card storage portions are respectively arranged on the upper and lower surfaces of the circuit board. The storage portions are arranged at the same position to oppose each other across the circuit board, and respectively have opening portions formed to oppose the card insertion port. A memory card is detachably housed in the first and second card storage portions through the insertion port and the opening portions. The memory card is arranged parallel to the circuit board when the memory card housed in the storage portions.

Abstract: A portable computer includes a box-like case having a front wall and an upper wall continuous to the front wall. A keyboard is arranged on the upper wall of the case, and a display unit is supported by the case. This display unit is rotatable between a first position where the display unit covers the keyboard and a second position where the display unit exposes the keyboard. The case is provided with a speaker which is situated on the front wall and visible from the outside of the case when the display is in either the first position or the second position.

Abstract: A portable electronic apparatus has a box-like case. The case includes a peripheral surface having a card insertion port formed therein. A circuit board is housed in the case. First and second card storage portions are respectively arranged on the upper and lower surfaces of the circuit board. The storage portions are arranged at the same position to oppose each other across the circuit board, and respectively have opening portions formed to oppose the card insertion port. A memory card is detachably housed in the first and second card storage portions through the insertion port and the opening portions. The memory card is arranged parallel to the circuit board when the memory card housed in the storage portions.

Abstract: An expanding apparatus 215 has a body case 216 having a bearing surface 219, and a second connector 227 provided on the body case. When a personal computer is placed on a bearing surface and moved to a connecting position, a first connector 207 provided on a rear surface of the personal computer is releasably connected with the second connector, and a spring-biased fixing member 170 of the expanding apparatus engages an engaging portion 92a of the computer so as to restrict the movement of the computer. An ejector mechanism includes an operating knob 280 and a pair of pushers 242a, 242b provided on both sides of the second connector, for pushing the rear surface of the computer so as to release the connection between the first and second connectors and to eject the computer from the connecting position.

Abstract: A personal computer includes a box-shaped body having a rear surface provided with a first connector. The box-shaped body is mountable on an expanding apparatus having a second connector, in a manner which joins the first and second connectors, to expand the functions of the personal computer. The expanding apparatus includes an ejector mechanism for pushing the box-shaped body away from the expanding apparatus so that the first and second connectors are disconnected. A lock mechanism locks the box-shaped body to the expanding apparatus when the first and second connectors are connected. An interlock mechanism unlocks the lock mechanism when the ejector mechanism is operated. The expanding apparatus includes a grounding mechanism which moves a metal fitting into contact with the box-shaped body when the first and second connectors are connected and moves the metal fitting out of contact with the box-shaped body when the first and second connectors are disconnected.