Abstract: Disclosed herein is a frequency modulated continuous wave (FMCW) radar. The FMCW radar includes: a transmission signal generator that generates a frequency-modulated transmission signal; a transmission signal sender that sends the transmission signal; a receiver that receives a reflected wave of the transmission signal; an adjuster that adjusts the amplitude and phase of a cancel signal, which cancels a leakage signal component in a received signal, in accordance with a variation in the frequency of the transmission signal; and a superimposer that superimposes the cancel signal over the received signal to cancel the leakage signal component.

Abstract: There is provided a panel member capable of restraining an increase in weight of a wing panel while restraining wasteful work in the manufacturing process, an aircraft main wing, and a method for forming the panel member. A wing panel 10 is formed with ridges 20 each having a dimension larger than the machining tolerance in the boundary portions between areas A1, A2, . . . . Therefore, the worker who handles the wing panel 10 can visually confirm the step portions of the areas A1, A2, . . . easily. Thereby, if a flaw or the like is found in the areas A1, A2, . . . , corrective actions can be properly taken on the actually existing flaw without mistaking the flaw for the step portion of the areas A1, A2, . . . .

Abstract: Disclosed herein is a frequency modulated continuous wave (FMCW) radar. The FMCW radar includes: a transmission signal generator that generates a frequency-modulated transmission signal; a transmission signal sender that sends the transmission signal; a receiver that receives a reflected wave of the transmission signal; an adjuster that adjusts the amplitude and phase of a cancel signal, which cancels a leakage signal component in a received signal, in accordance with a variation in the frequency of the transmission signal; and a superimposer that superimposes the cancel signal over the received signal to cancel the leakage signal component.

Abstract: A diversity reception circuit obtains a synthesized output based on signals received at a plurality of antennas. The diversity reception circuit includes a plurality of PLLs outputting respective local oscillation signals; a plurality of mixers converting respective received radio frequency signals to low frequency signals; and a switch circuit selecting any one of outputs of the PLLs and supplying the selected output to at least one of the mixers.

Abstract: An airframe panel for aircraft having stringers and ribs which enables reduction of the workload of the shimming operation includes a plurality of stringers provided on the inner surface of a lower skin along the spanwise direction of a wing, and a plurality of ribs provided along the chordwise direction of the wing. In a part of the panel in which a rib is provided, a flat support surface connects the two adjacent stringers. In another part of the panel in which no rib is provided, a stepped surface connects the two adjacent stringers where the stepped surface includes a thin-walled groove, and thick-walled bases to be connected to the stringers located at both sides of the groove.

Abstract: A diversity reception circuit obtains a synthesized output based on signals received at a plurality of antennas. The diversity reception circuit includes a plurality of PLLs outputting respective local oscillation signals; a plurality of mixers converting respective received radio frequency signals to low frequency signals; and a switch circuit selecting any one of outputs of the PLLs and supplying the selected output to at least one of the mixers.

Abstract: There is provided a wing panel having improved formability at the time when the wing panel is curvedly formed by the peen forming method, and an aircraft main wing provided with the said wing panel. For a stringer member 20, a base part 21 is formed, and the neutral axis position N in the cross-sectional direction is located on the wing panel 11 side from the center position C in the height direction of a web part 22. When the peen forming method is carried out by projecting metal shots to a portion near a flange part 23 in the tip end portion of the stringer member 20, the tensile strain developing in the portion near a flange part 23 acts in a state in which the moment length around the neutral axis position N is kept long.

Abstract: A diversity receiver includes a local oscillation (LO) signal generator that generates LO signals, each having a phase different from one other; a first frequency converter that includes a first switching mixer controlled by at least one of the LO signals and converts a frequency of a first input signal to generate a first output signal by combining the first input signal with the LO signals; a second frequency converter that includes logic circuits, each of which delivers a corresponding LO signal, and a second switching mixer controlled by an output of the logic circuits, and converts a frequency of a second input signal to generate a second output signal by combining the second input signal with the LO signals, each output of the logic circuits being activated or deactivated in accordance with a corresponding phase control signal; and a combiner that combines the first output signal from the first frequency converter and an output signal and the second signal from the second frequency converter.

Abstract: A diversity receiver includes a local oscillation (LO) signal generator that generates LO signals, each having a phase different from one other; a first frequency converter that includes a first switching mixer controlled by at least one of the LO signals and converts a frequency of a first input signal to generate a first output signal by combining the first input signal with the LO signals; a second frequency converter that includes logic circuits, each of which delivers a corresponding LO signal, and a second switching mixer controlled by an output of the logic circuits, and converts a frequency of a second input signal to generate a second output signal by combining the second input signal with the LO signals, each output of the logic circuits being activated or deactivated in accordance with a corresponding phase control signal; and a combiner that combines the first output signal from the first frequency converter and an output signal and the second signal from the second frequency converter.

Abstract: There is provided a panel member capable of restraining an increase in weight of a wing panel while restraining wasteful work in the manufacturing process, an aircraft main wing, and a method for forming the panel member. A wing panel 10 is formed with ridges 20 each having a dimension larger than the machining tolerance in the boundary portions between areas A1, A2, . . . . Therefore, the worker who handles the wing panel 10 can visually confirm the step portions of the areas A1, A2, . . . easily. Thereby, if a flaw or the like is found in the areas A1, A2, . . . , corrective actions can be properly taken on the actually existing flaw without mistaking the flaw for the step portion of the areas A1, A2, . . . .

Abstract: A received is disclosed that is capable of improving reception sensitivity while avoiding an increase in circuit scale. The receiver includes: a multi-phase local oscillation signal generating section that generates a plurality of local oscillation signals of different phases; a phase selection signal generating section that generates a phase selection signal used to select a baseband signal of a predetermined phase based on a detection result of a reception level of a high-frequency signal; and a frequency converter that frequency-converts the high-frequency signal based on the plurality of local oscillation signals, that generates a plurality of baseband signals of different phases, and that selects a baseband signal from among the plurality of baseband signals based on the phase selection signal.

Abstract: A narrow prepreg sheet 20N is bonded along a ridge C, and wide prepreg sheet 20W is bonded to other portions, whereby the wide prepreg sheet 20W having no cut line is bonded to both side portions of the ridge C. In a portion in which a spar 10 is curved, the narrow prepreg sheet 20N is bonded in an axial direction of the spar 10 while divided into plural pieces, and a length of the narrow prepreg sheet 20N is adjusted according to a radius of curvature of the curved portion in the axial direction of the spar 10, whereby various radii of curvature are easily dealt with.

Abstract: A received is disclosed that is capable of improving reception sensitivity while avoiding an increase in circuit scale. The receiver includes: a multi-phase local oscillation signal generating section that generates a plurality of local oscillation signals of different phases; a phase selection signal generating section that generates a phase selection signal used to select a baseband signal of a predetermined phase based on a detection result of a reception level of a high-frequency signal; and a frequency converter that frequency-converts the high-frequency signal based on the plurality of local oscillation signals, that generates a plurality of baseband signals of different phases, and that selects a baseband signal from among the plurality of baseband signals based on the phase selection signal.

Abstract: In order to provide an airframe panel for aircraft having stringers and ribs which enables reduction of the workload of the shimming operation, an airframe panel for aircraft of the present invention includes a plurality of stringers 15 provided on the inner surface of a lower skin 13 along the spanwise direction of a wing, and a plurality of ribs 17 provided along the chordwise direction of the wing. In a part of the panel in which a rib 17 is provided, a flat support surface 15c connects the two adjacent stringers 15. In another part of the panel in which no rib 17 is provided, a stepped surface connects the two adjacent stringers 15 where the stepped surface includes a thin-walled groove 16, and thick-walled bases 15a to be connected to the stringers 15 located at both sides of the groove 16.

Abstract: There is provided a wing panel having improved formability at the time when the wing panel is curvedly formed by the peen forming method, and an aircraft main wing provided with the said wing panel. For a stringer member 20, a base part 21 is formed, and the neutral axis position N in the cross-sectional direction is located on the wing panel 11 side from the center position C in the height direction of a web part 22. When the peen forming method is carried out by projecting metal shots to a portion near a flange part 23 in the tip end portion of the stringer member 20, the tensile strain developing in the portion near a flange part 23 acts in a state in which the moment length around the neutral axis position N is kept long.

Abstract: A sampling filter device wherein the filter characteristic is variable without using a control signal of a complicated waveform is provided. A sampling filter device 105 has integration capacitors 130 and 131, an integration time adjustment section 180, and a plurality of switches 100, 101, 110, and 111. Input current is integrated in different time duration with one clock and is stored in the integration capacitors 130 and 131 and 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 capacitors 130 and 131 with each clock, the integration time duration is changed, whereby it is made possible to weight and add output charge and the filter characteristic changes.

Abstract: A vent stringer 20 is formed by a pair of ribs 21 rising in the direction perpendicular to an inner surface 11a of a wing panel 11, and a cover 22 provided in the tip end portions of the ribs 21. With rivets 23 unexposed to an outer surface 11b of the wing panel 11, a spark is prevented from occurring in a fuel tank 30, which is provided in a main wing 10, through the rivet 23 at the time of a lightning strike. Formed by being machined integrally with the wing panel 11, the rib 21 is formed with high accuracy so as to match the curved shape of the wing panel 11. The cover 22 has only to be formed by curving a strap member so as to match the shapes of the wing panel 11 and the ribs 21.

Abstract: In a receiver circuit, an analog signal processor frequency-converts an input high frequency signal into a baseband signal, and performs low pass filtering at a cutoff frequency below a desired-wave band. An ADC converts an output of the analog signal processor into a digital signal. A digital signal processor compensates an output of the ADC for a signal component in the desired-wave band which has been attenuated by the filtering operation of the analog signal processor.

Abstract: Provided are a direct sampling circuit and a receiver using a discrete time analog process and having a filter effect of a steep attenuation characteristic in a narrow-pass band without lowering a sampling rate. In a discrete time direct sampling circuit (13), the positive phase side and the inverse phase side are both sampled by a local signal for a differential current output of a differential voltage/current conversion unit (1011) and electric charge is accumulated in a charge sampling capacitor. The latest accumulated charge at the positive phase side and charge accumulated at the inverse phase side before a predetermined number of samples are combined with the charge accumulated in a history capacitor (1043) in the past. Thus, it is possible to realize equivalently high-degree FIR filter characteristic.

Abstract: There are provided a sampling filter that enables a filter characteristic to be adjusted flexibly, and a radio communication apparatus equipped with this sampling filter. A sampling filter apparatus (100) is equipped with four integration units (150-1 through 150-4) corresponding to the number of filter taps, and some of the integration units (150-1 through 150-4) include an integrator having an MEMS structure. By this means, a charge amount (accumulated charge amount) of a received signal integrated by an integrator can be adjusted by adjusting the capacity of an integrator having an MEMS structure. A received signal amount emitted from an integration unit can also be adjusted by adjustment of the integration amount of a received signal, enabling the filter characteristic of the sampling filter apparatus (100) to be adjusted flexibly.