Abstract: An array antenna is provided with a feeding line including a first branch line and a second branch line, and a coupling line. Radiating elements provided for the first branch line are disposed on one side of the first branch line. Radiating elements provided for the second branch line are disposed on a side of the second branch line that is opposite to the one side. A distance from a coupling part, in which the first and second branch lines couples with the coupling line, to a radiating element that is closest to the coupling part out of the plurality of radiating elements provided for the first branch line is greater than a distance from the coupling part to a radiating element that is closest to the coupling part out of the plurality of radiating elements provided for the second branch line, by (2n?1)?/2 in electrical length.

Abstract: An array antenna is provided with a feeding line including a first branch line and a second branch line, and a coupling line. Radiating elements provided for the first branch line are disposed on one side of the first branch line. Radiating elements provided for the second branch line are disposed on a side of the second branch line that is opposite to the one side. A distance from a coupling part, in which the first and second branch lines couples with the coupling line, to a radiating element that is closest to the coupling part out of the plurality of radiating elements provided for the first branch line is greater than a distance from the coupling part to a radiating element that is closest to the coupling part out of the plurality of radiating elements provided for the second branch line, by (2n?1)?/2 in electrical length.

Abstract: An array antenna is provided with: a feeding line; and a plurality of radiating elements, wherein the feeding line has a part whose length corresponds to (2n?1)/4 (wherein n is a natural number) times as long as a wavelength, in electrical length, from a reflection end of said feeding line, wherein the part is wider than another part that is on an input end side with respect to the part.

Abstract: An array antenna device includes a plurality of antenna elements arranged to include a first antenna element arrangement in which antenna elements are arranged at element intervals having predetermined periodicity and a second antenna element arrangement in which antenna elements are arranged at element intervals having predetermined periodicity different from the periodicity in the first antenna element arrangement. The array antenna device includes a control unit configured to remove erroneous detection caused by a grating lobe based on a comparison of a detection result by an array antenna of the first antenna element arrangement and a detection result by an array antenna of the second antenna element arrangement.

Abstract: A DS-SS radar 10 detects an object in such a way that a code generator 21, an oscillator 32, and an antenna 24 repeatedly send a sending signal modulated with a predetermined-frequency code generated by the code generator 21, an A/D converter 45 samples the code, included in the reflected wave of the sending signal reflected by an object, with a sampling period lower than the period of the code, and a correlator 46 calculates the correlation between the reference code, generated by re-arranging the code from the code generator 21 at an interval of Nsp, and the sampling data converted by the A/D converter 45.

Abstract: A radar apparatus includes a change amount calculation section for obtaining, for each of a plurality of peaks of a first spectrum belonging to the same group, a peak value at the present point in time and calculating the difference between the peak value and a peak value obtained before the present point in time; a ratio calculation section for comparing the obtained difference with a predetermined difference threshold and calculating a ratio of the number of peaks whose differences are greater than the difference threshold to the number of all the peaks belonging to the same group; and a pedestrian determination section for determining that the object is a pedestrian when the calculated ratio is greater than a predetermined ratio threshold and at least one of peaks belonging to the same group differs from the remaining peaks in terms of the sign of the difference.

Abstract: An array antenna device includes a plurality of antenna elements arranged to include a first antenna element arrangement in which antenna elements are arranged at element intervals having predetermined periodicity and a second antenna element arrangement in which antenna elements are arranged at element intervals having predetermined periodicity different from the periodicity in the first antenna element arrangement. The array antenna device includes a control unit configured to remove erroneous detection caused by a grating lobe based on a comparison of a detection result by an array antenna of the first antenna element arrangement and a detection result by an array antenna of the second antenna element arrangement.

Abstract: A vehicle radar apparatus includes an antenna board provided with an antenna unit configured to transmit and receive a radio wave on one side surface, a high-frequency circuit being provided on the surface of the antenna board and configured to generate the radio wave to be transmitted and perform processing of the received radar wave, and a case configured to accommodate the antenna board and the high-frequency circuit. The case includes a cover portion that is provided so as to cover the surface side of the antenna board. The cover portion includes a transmission portion configured to transmit the radio wave, and a heat conduction portion having a thermal conductivity higher than a thermal conductivity of the transmission portion. The heat conduction portion is configured to be in contact with the high-frequency circuit directly or via an indirect member.

Abstract: A DS-SS radar 10 detects an object in such a way that a code generator 21, an oscillator 32, and an antenna 24 repeatedly send a sending signal modulated with a predetermined-frequency code generated by the code generator 21, an A/D converter 45 samples the code, included in the reflected wave of the sending signal reflected by an object, with a sampling period lower than the period of the code, and a correlator 46 calculates the correlation between the reference code, generated by re-arranging the code from the code generator 21 at an interval of Nsp, and the sampling data converted by the A/D converter 45.

Abstract: A radar apparatus includes a change amount calculation section for obtaining, for each of a plurality of peaks of a first spectrum belonging to the same group, a peak value at the present point in time and calculating the difference between the peak value and a peak value obtained before the present point in time; a ratio calculation section for comparing the obtained difference with a predetermined difference threshold and calculating a ratio of the number of peaks whose differences are greater than the difference threshold to the number of all the peaks belonging to the same group; and a pedestrian determination section for determining that the object is a pedestrian when the calculated ratio is greater than a predetermined ratio threshold and at least one of peaks belonging to the same group differs from the remaining peaks in terms of the sign of the difference.

Abstract: A radar device including: a reception antenna that receives radio waves, includes at least three antennas and is arranged so that the phase center points thereof form an isosceles triangle; an arrival direction detection unit that detects an arrival direction of the radio waves by a phase monopulse method; and a phase correction unit that corrects a phase difference between phases of radio waves respectively received by two adjacent antennas among the three antennas based on the relationship of the phases of the radio waves respectively received by the three antennas.

Abstract: Provided is an array antenna device which is capable of easily setting radiation coefficients of respective antenna elements and easily matching impedances. The array antenna device 1 according to the present invention comprises: a plurality of antenna blocks 4 provided on a front side of a dielectric substrate 3, wherein each of the plurality of antenna blocks 4 includes: a feed microstrip line 6; and an antenna element 2 connected to a middle part 61 of the feed microstrip line 6, wherein the feed microstrip line 6 has: the middle part 61; an input side impedance matching element 7 connected to the middle part 61 so as to be distant from the antenna element 2; and an output side impedance matching element 8 connected to the middle part 61 so as to be distant from the antenna element 2.

Abstract: A pulse radar apparatus, which includes transmitting means for transmitting a pulsed wave and receiving means for receiving a reflected wave of the transmitted wave transmitted by the transmitting means and calculates at least one of a relative distance and a relative speed with respect to an object based on a relationship between the wave transmitted by the transmitting means and the wave received by the receiving means, is provided with pulse width varying means for varying a pulse width of the wave transmitted by the transmitting means according to a position of a required detection range where calculation of the at least one of the relative distance and the relative speed with respect to the object is required.

Abstract: A radar device including: a reception antenna that receives radio waves, includes at least three antennas and is arranged so that the phase center points thereof form an isosceles triangle; an arrival direction detection unit that detects an arrival direction of the radio waves by a phase monopulse method; and a phase correction unit that corrects a phase difference between phases of radio waves respectively received by two adjacent antennas among the three antennas based on the relationship of the phases of the radio waves respectively received by the three antennas.

Abstract: To enable a user to perform a hypothetical simulation of the use of firefighting equipment so as to be able to experience operation of such firefighting equipment without using actual firefighting equipment, a manual provision system includes an information terminal device, and a server in which manual information pertaining to an article is recorded, the information terminal device and the server connected to each other through a network, the manual information for the article being scanned into the information terminal device from the server through the network so as to allow the manual information to be checked using the information terminal device. The article is a piece of firefighting equipment and the manual information is a hypothetical operation simulation for the firefighting equipment so as to enable learning the manual information by using the information terminal device to operate the hypothetical operation simulation.

Abstract: A digital broadcast is received by a receiving unit 5, and is output from a speaker 9. During a waiting time for changing-over of channels, or the like, a control unit 11 causes a holding sound generating unit 15 generate a holding sound as a waiting signal. The holding sound is an intermittent synthetic sound, whose pitch is shortened according to the remainder of the waiting time. In another embodiment, the channel selected by a user is received and output with one receiving unit, and at the same time, the channels other than the selected channel are received and stored with another receiving unit. During the waiting time due to the changing-over of channels, received signals of the selected channel are read out and output. A user can be informed of the content of a broadcast during the waiting time.