专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS5992369A DIRECTION FINDER 失效
公开(公告)号：JPS5992369A
公开(公告)日：1984-05-28
申请号：JP20316482
申请日：1982-11-19
申请人： NIPPON ELECTRIC CO
发明人： TSUJI TADAO , ITOU SHINICHI , KAWAMURA SHIYOUICHIROU , YONEKURA MASAMICHI
IPC分类号： G01S3/30
摘要： PURPOSE:To reduce size and weight by radiating N radiation beams, selecting a couple of outputs corresponding to two radiation beams for direction detection among them, and comparing the amplitudes of received signals with each other and finding the direction. CONSTITUTION:Outputs of either independent directional antennas 1-8 arranged circularly are supplied to a selecting circuit 20 to select one couple of outputs of two adjacent antennas, which are sent to a direction detector and receiver 21. Then, the arrival angle of a radio wave is found from the amplitude ratio of the received signals. Further, the selecting circuit 20 switches the directional antennas 1-8 in order to perform direction finding over the entire circumference.

2. 发明专利

JPS58129376A RADAR SYSTEM 失效
公开(公告)号：JPS58129376A
公开(公告)日：1983-08-02
申请号：JP1348082
申请日：1982-01-29
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI , TANAKA AKIO
IPC分类号： H01Q21/29 , G01S7/36
摘要： PURPOSE:To maintain a large ratio of reception level of a subantenna with respect to the reception level in the side lobe region of a main antenna by automatically directing the beam of the subantenna to the incoming direction of a disturbing wave detected with a detector for the bearing thereof. CONSTITUTION:This is composed of main antenna receiving system comprising a main antenna 1 and a receiver 2, a subantenna receiving system comprising a subantenna 14 and a receiver 5, a disturbing wave bearing detector 13, a beam scanner 18, a phase shifter 15 and a direction tracker 17. The subantenna 14 is provided to scan the direction of beam with a phase shifter 15 and the beam is directed to the incoming direction of a disturbing wave with the driving of the phase shifter 15 by the beam scanner 18 detecting the direction thereof with the disturbing wave bearing detector 13. This can keep the gain of the subantenna so high with respect to the side lobe level in the incoming direction of the disturbing wave to improve the effect of suppressing side lobe.

3. 发明专利

JPS60117802A ELECTRONIC SCAN ANTENNA 失效
公开(公告)号：JPS60117802A
公开(公告)日：1985-06-25
申请号：JP22483483
申请日：1983-11-29
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI
IPC分类号： G01S7/02 , H01Q3/24 , H01Q3/26 , H01Q21/20 , H01Q25/00
摘要： PURPOSE:To reduce the deterioration of produced beams and also to improve the efficiency for production of narrow beams by arranging N faces of phase electronic scan type antenna radiation parts as if a part of a prescribed beam scan face were formed and exciting >=2 faces of antenna radiation parts to produce beams. CONSTITUTION:A high frequency signal supplied to an antenna input terminal 21 is led to an input terminal 17 of a variable power distributor 16. The input signal of the distributor 16 is delivered to output terminals 18 and 19 in a fixed power ratio and according to the scan angle of elevation of the antenna beam in a low elevation area and then to an output terminal 19 with full power in a high elevation area under the control of an external control signal. The output signals of distributor 16 thus distributed are led to antenna radiation parts 10 and 13 and supplied to an antenna input terminal 22 for phase control signal to form a prescribed distribution via a pedestal 20 supplied to an antenna input terminal 22 for phase control signal and under the control of the phase control signals supplied to control terminals 12 and 15 of the antenna radiation parts. Then radiation beams are formed at a prescribed angle of elevation.

4. 发明专利

JPS58162880A RADAR SYSTEM 失效
公开(公告)号：JPS58162880A
公开(公告)日：1983-09-27
申请号：JP4588582
申请日：1982-03-23
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI , KAWAMURA SHIYOUICHIROU
IPC分类号： G01S3/20 , G01S13/72 , G01S13/87
摘要： PURPOSE:To increase the number of the acquired data at every one rotation of an antenna and to eliminate the uncertainty in target bearings by plural beams, by adding beams of low gains in addition to the main beams of the antenna. CONSTITUTION:Beams 3 of low gain are added in the direction differing from the direction of the main beams 2 of an antenna rotating in a horizontal plane, in addition to said main beams 2. The amplitudes of the target data obtained successively are compared, whereby target bearings are determined.

5. 发明专利

JPS60180306A ELECTRONIC SCANNING ANTENNA 失效
公开(公告)号：JPS60180306A
公开(公告)日：1985-09-14
申请号：JP3652684
申请日：1984-02-28
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI
IPC分类号： G01S7/02 , H01Q3/24 , H01Q3/26 , H01Q3/40 , H01Q21/20 , H01Q21/22 , H01Q25/00
摘要： PURPOSE:To keep always the normality of an aperture efficiency and a radiation characteristic of a radiation beam over a prescribed scanning angular range by setting an electric field distribution at the irradiation aperture face formed with at least >=1 face of the irradiation aperture part corresponding to a prescribed designed electric field distribution. CONSTITUTION:The irradiating part consists of a radiating aperture section 9 including a feeding phase control circuit 5 and radiating elements 7-1-7-m1 and a radiating aperture section 10 including a feeding phase control circuit 6 and radiating elements 8-1-8-m2. A feeding circuit 11 is formed so as to feed a transmission signal to the radiating elements via directional couplers 14-1-14-m1, 15-1-15-m2, 16-1-16-m2 provided in a special interval relating to the signal wavelength in transmission lines 21, 22. When a signal inputted from a terminal 53 is inputted to a terminal 55 of the feeding circuit 11 by a signal switching circuit 12, both the aperture sections are contributed effectively by setting the coupling distribution of the directional couplers 14-1-14-m1 and 15-1-15-m2 to the transmission line 21 so that the aperture electric field distribution of the radiating aperture sections 9 and 10 is a prescribed electric field distribution.

6. 发明专利

JPS55132107A MICROSTRIP ANTENNA FOR CIRCULAR POLARIZED WAVE 失效
公开(公告)号：JPS55132107A
公开(公告)日：1980-10-14
申请号：JP3910179
申请日：1979-03-30
申请人： NIPPON ELECTRIC CO , INAGAKI NAOKI
发明人： INAGAKI NAOKI , ITOU SHINICHI
IPC分类号： H01Q13/08 , H01Q13/18 , H01Q13/20 , H01Q21/08 , H01Q21/24
摘要： PURPOSE:To make a circular polarized wave antenna thin by providing a microstrip line, bent periodically, with a conductor plate radiating element coupled electromagnetically with it. CONSTITUTION:Input power is transmitted through microstrip line 10 and in its process, it couples electromagnetically with rectangular radiation terminal 11-1 at coupling parts 12 and 13 to radiate a radio wave. In this case, coupling parts 12 and 13 differ in spatial direction by 90 degrees, so radiated radio waves are circular polarized waves. Here, the circular polarized waves can be obtained even when the bending angle of line 10 is set to any other angle than 90 degrees and the radiating element is changed in shape. Further, since line 10 is bent by every 1/2 wavelength and arrayed periodically, circular polarized waves radiated from radiating elements 11-1... are in phase in the direction perpendicular to dielectric substrate 3 and then added, thereby forming an array pattern. Thus, a circular polarized wave array pattern of thin structure can be formed.

7. 发明专利

JPS5549001A ELECTRONIC SCANNING ANTENNA 失效
公开(公告)号：JPS5549001A
公开(公告)日：1980-04-08
申请号：JP12323778
申请日：1978-10-05
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI , NISHIMURA TAKASHI
IPC分类号： H01Q3/38
摘要： PURPOSE:To attain an easy and smooth beam scan at a high speed with excellent approximation to a wave surface by increasing and decreasing the phase shifting value of an electronic phase scanning antenna using a discrete phase shifter on a minimum unit. CONSTITUTION:A linear phased array antenna of a radar system, etc., using a discrete phase shifter consists of radiating elements 1-1-1-N, discrete phase shifters 2-1-2-N, power distributor 3, beam controller 4, etc. A beam assignment direction realized at the time of leading phase 11-1 applied to element 1-1 and lagging phase 11-1' applied to element 1-19 is represented by 12-1, and those in respective steps at the time phases 11-2-11-6 and 11-2'-11-6' applied to elements 1-2-1-6 and 1-18-1-14 are by 12-2-12-6. Then, a unit of phase shifting is a minimum unit determined by a phase-shifter discrete degree, e.g. phi=2pi/2 =pi/8 in case of a fourbit phase shifter.

8. 发明专利

JPS5518958A ELECTRONIC SCANNING RADAR 失效
公开(公告)号：JPS5518958A
公开(公告)日：1980-02-09
申请号：JP9194778
申请日：1978-07-26
申请人： NIPPON ELECTRIC CO , GOTOU NAOHISA
发明人： IZUMITANI TOSHIYUKI , ITOU SHINICHI , YOKOYAMA HIROSHI , GOTOU NAOHISA
IPC分类号： H01Q3/26 , G01S7/02 , G01S13/44 , H01Q3/30 , H01Q21/22 , H01Q25/00
摘要： PURPOSE:To shorten the beam scanning time, while holding the accuracy of an elevation, by setting a proper shift in a phase shifter so that the beam shape is expanded substantially in a Gauss shape. CONSTITUTION:In order to realize the vertical voer area 21 which is required for radar for scanning a pencil beam, in a low elevation region having the maximum covering distance, this region is covered with beams 40-1, 40-2 and so on having such beam width as are determined as small as possible by the aperture of an antenna. A high elevation region having short covering distance is made to have its beam width expanded as much as possible for the antenna gain so that the beam spacings are also expanded proportionally. As a result, a shift is set properly in a phase shifter by the command of a beam controller 11 so that the beam shape is formed into that of a Gauss function. As a result, the angle calculation can be simplified by the interporation of the beams, and the number of the beams in a vertical plane is reduced to shorten the scanning time.

9. 发明专利

JPS5331991A ELECTRON SCANNING RADAR 失效
公开(公告)号：JPS5331991A
公开(公告)日：1978-03-25
申请号：JP10690476
申请日：1976-09-06
申请人： NIPPON ELECTRIC CO
发明人： ITOU SHINICHI
IPC分类号： H01Q3/26 , G01S7/02 , G01S13/42
摘要： PURPOSE:Scanning time within coverage is reduced and data rate is largely increased only by changing the radar operation command from an electronic computer while the constitution of the antenna unit is kept simple.

10. 发明专利

JPS5585108A ANTENNA FOR CIRCULAR POLARIZED WAVE 失效
公开(公告)号：JPS5585108A
公开(公告)日：1980-06-26
申请号：JP15953078
申请日：1978-12-21
申请人： NIPPON ELECTRIC CO , GOTOU NAOHISA
发明人： GOTOU NAOHISA , ITOU SHINICHI
IPC分类号： H01Q13/10 , H01Q21/00
摘要： PURPOSE:To establish the antenna producing the circular polarized wave without deterioration of performance and with simple construction, by selecting the slope of the straight line slot shaped on the side wall of rectangular waveguide and the position. CONSTITUTION:At the side wall of the rectangular waveguide 2 having the power feeding section 1, the slots 5, 6 narrow and with a slope of 45 deg. and -45 deg. to the tube axis taking the two points A, B in the distance of 1/4 wave length in-tube wave length as the center are provided. The emitted electric field from the slots 5, 6 like these is almost equal to the direction vertical to the side wall and has the phase difference of 90 deg., allowing to obtain the circular polarized wave as the synthesized electromagnetic waves. Futher, by locating a plurality of antennas 10 having the phase shifter 30 and termination resistance 20 and different in the slot position by 1/2 wave length alternately, the planer array antenna can be constituted.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式