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1. 发明专利

JPS63292748A MODULATION CIRCUIT 失效
公开(公告)号：JPS63292748A
公开(公告)日：1988-11-30
申请号：JP12772387
申请日：1987-05-25
申请人： YAGI ANTENNA , HITACHI LTD
发明人： MORIFUJI MOTOYOSHI , KANEKO YOICHI , TERADA MATSUAKI , FUKUZAWA JUNJI
IPC分类号： H03C1/58 , H04L27/00 , H04L27/36
摘要： PURPOSE:To prevent the spread of a spectrum by providing a gate circuit decoding a base band pulse signal and a low pass filter so as to easily realize the multi-level modulation of the amplitude and phase. CONSTITUTION:The titled circuit is provided with a ring modulation circuit 41 modulating a carrier signal based on two kinds of base band pulse signals S1, S2, a gate circuit 42 applying multi-level modulation to the phase and amplitude of a carrier signal in response to the combination of the base band pulse signals S1, S2 and a low pass filter 43 provided between the ring modulation circuit 41 and the gate circuit 42. Thus, the multi-level modulation of the phase and amplitude including the on/off control of the carrier signal is realized with a simple constitution and the spread of spectrum of the carrier signal after modulation is prevented.

2. 发明专利

JPS63290424A SYNCHRONIZING SIGNAL GENERATING CIRCUIT 失效
公开(公告)号：JPS63290424A
公开(公告)日：1988-11-28
申请号：JP12529087
申请日：1987-05-22
申请人： YAGI ANTENNA , HITACHI LTD
发明人： MORIFUJI MOTOYOSHI , KANEKO YOICHI , TERADA MATSUAKI , FUKUZAWA JUNJI
IPC分类号： H03L7/08 , H03K5/00 , H04L7/02 , H04L7/033
摘要： PURPOSE:To obtain a stable synchronizing signal even when an external input data including jitter is supplied by using a low pass filter so as to integrate the phase change, and relaxing the control of a VCO. CONSTITUTION:An external input data B is supplied to a differentiation circuit 101 and a D FF 109. The differentiation circuit 101 generates a differentiating pulse at the leading and trailing edges of the input data B, supplies it to a 1st frequency dividing circuit 104 as a reset pulse to allow the circuit 104 to output a signal A having the same period as the input data B. The signal A is subject to phase comparison with a signal C from a 2nd frequency divider circuit 108 by a phase comparing circuit 105 and its phase error is inputted to a control terminal of the VCO 107 via an integrating circuit 106. In such a case, the change in an output voltage D2 is made slow by the operation of the integrating circuit 106 and even when an external input data including jitter is supplied, a stable synchronizing signal is obtained.

3. 发明专利

JPH05251916A 失效
公开(公告)号：JPH05251916A
公开(公告)日：1993-09-28
申请号：JP4535592
申请日：1992-03-03
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , TAMURA KAZUHIKO
IPC分类号： H01Q1/22
摘要： PURPOSE:To allow an antenna system for, e.g. automotive use to be mounted either outside or inside and to obtain a sufficient sensitivity without providing a rod-like projection part. CONSTITUTION:Coupling coils 7, 8 whose diameter is shorter than the width of front pillars 4, 10 are arranged closely to the front pillars 4, 10 of a passenger car 9 in the range of an incoming electromagnetic field of a received signal wave by arranging adjacently their coil faces so as to be intersected orthogonaly with the face of the pillars, and a high frequency signal is induced in the coupling coils 7, 8 with a magnetic field generated on the pillar surface in parallel attended with the high frequency current flowing to the front pillars 4, 10, then no rod antenna is protruded to the surface of the car body, the car body itself is used for a radiator with small sized and simplified structure and the reception performance with high sensitivity is obtained.

4. 发明专利

JPH0546173B2 失效
公开(公告)号：JPH0546173B2
公开(公告)日：1993-07-13
申请号：JP2588487
申请日：1987-02-06
申请人： YAGI ANTENNA
发明人： TAKAHASHI AKIRA , MORIFUJI MOTOYOSHI , KANEKO YOICHI
IPC分类号： H02H9/04

5. 发明专利

JPH05121930A PLANE ANTENNA 失效
公开(公告)号：JPH05121930A
公开(公告)日：1993-05-18
申请号：JP27771191
申请日：1991-10-24
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI
IPC分类号： H01Q3/26 , H01Q13/08 , H01Q21/06 , H01Q21/26
摘要： PURPOSE:To uniformize the excitation of a radiation element over a broad band by extending plural microstrip line feeders radially from a center feeding point, branching the feeders in parallel toward the circumference resulting in increasing number of the feeders thereby reducing the length of the feeders. CONSTITUTION:Strip line feeders 1, 3, 5, 8, 10 with a narrow width and strip line feeders 2, 4, 9, 11 with a wide width at an interval of 1/2 wavelength are installed. Then microstrip antenna arrays 14, 15 whose radiation is set in response to the difference from the width of the feeders are connected in parallel as two branches from the feeders' side at a phase difference of 180 deg. with a deviation of 1/2 wavelength. Thus, the difference from the line width of each radiation unit is increased as the point is remoter than the feeding side. Then the travelling wave series feeding system is adopted and the feeders are arranged side by side at a phase difference of 180 deg. so that the narrow width feeder part is opposite to the wide width feeder part. As a result, the length of the feeders is reduced, the spurious radiation of the narrow width feeders is suppressed and the radiation element is uniformly excited in the direction of the feeding end.

6. 发明专利

JPH03101507A PLANER ANTENNA 失效
公开(公告)号：JPH03101507A
公开(公告)日：1991-04-26
申请号：JP23920789
申请日：1989-09-14
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , MINASE ATSUSHI , WAKAO YOSHIICHI , HIROHARA NAOYA
IPC分类号： H01Q21/06 , H01P5/02 , H01P5/12 , H01Q13/08 , H01Q21/24
摘要： PURPOSE:To improve the aperture efficiency by arranging two strip lines of split structure to separate layers above and under a ground conductor and applying electromagnetic coupling to 1st and 2nd slot lines with a coupling slot provided locally to the said conductor plate. CONSTITUTION:A trunk line feeder layer 14 supported on a ground conductor layer 10 is formed as a strip line form. Then an upper ground conductor layer 18 constituted by forming a conductor film 20 on a dielectric sheet 19 is supported onto the layer 14 via an insulator spacer 17. A strip line conductor 15 and a microstrip feeder line 24 are electromagnetically coupled with a coupling slot 28 provided to an upper ground conductor layer 18 being a common ground conductor. Since the length of the feeder to a radiation element via the coupling slot is decreased, even when the distance between the upper ground conductor layer and the radiation element layer is increased to make the characteristic of the radiation element wide, the radiation loss of the feeder is sufficiently reduced.

7. 发明专利

JPH02296401A ANTENNA SYSTEM 失效
公开(公告)号：JPH02296401A
公开(公告)日：1990-12-07
申请号：JP11766389
申请日：1989-05-11
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , WAKAO YOSHIICHI , KATO SEIJI , MINASE ATSUSHI
IPC分类号： H01P5/08
摘要： PURPOSE:To make the size of the system small and to attain a broad band system by leading a transmission signal inputted through a slit to a projection so as to attain signal radiation in the direction of the height of the said projection and the conductor hole side wall or the signal transmission to a waveguide. CONSTITUTION:A height (h) and a length (l) of a radiation ridge 8 are set a little longer than 1/4 of a transmission signal wavelength, a height H of a conductor hole 6 is set further larger than the 1/4 of the transmission signal wavelength and the lateral width W is set larger than 1/2 wavelength. That is, the upper aperture of the conductor hole 6 is a radiation aperture of an electromagnetic wave propagated to a radiator 5A while a modified ridge waveguide 5 is used as a feeder and the direction of an electric field of the radiating electromagnetic wave is coincident in the prolonged direction of a radiation ridge 8 and perpendicular to a bottom face 7 and the aperture in the conductor hole 6. The cut-off frequency in the radiator 5A is lower than the operating frequency. On the other hand, the width W of the conductor slot 3 of the modified ridge waveguide 5 is set sufficiently narrower than 1/2 wavelength and the cut-off frequency is increase more than the operating frequency.

8. 发明专利

JPH01269302A PLANE ANTENNA 失效
公开(公告)号：JPH01269302A
公开(公告)日：1989-10-26
申请号：JP9903988
申请日：1988-04-21
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , MINASE ATSUSHI , WAKAO IICHI
IPC分类号： H01Q21/06 , H01Q9/04
摘要： PURPOSE:To reduce a circuit loss due to a feeder line, and to increase antenna gain by providing the end part of a waveguide circuit and the boundary wall surface of a conductor substrate with a slot opening part, and electromagnetic- coupling the slot opening part and a strip line, and simultaneously, making a connection part be of minimum thickness. CONSTITUTION:A feeder layer conductor pattern is printed and formed on the insulating material sheet 14 of a feeder line layer 7 together with a large number of coupled radiation elements 15. The circular patch-shaped radiation element 15 is provided with notched parts 16, 16 at a conductor circumferential part, and is power-supplied from the strip line 17, and generates a circularly polarized wave. The slot opening part 4 is formed into a slender groove shape at a position away from the position directly below the antenna radiation element, and thus, the waveguide and the strip line can be electromagnetic-coupled without disturbing an antenna arrangement. Further, the strip line whose line width of the open end part of a strip line connecting part is increased so that length from the open end of the strip line to the slot opening part of the maximum current can be shortened is connected to a feeding strip line 25.

9. 发明专利

JPS62261256A DIGITAL PLL DEMODULATOR 失效
公开(公告)号：JPS62261256A
公开(公告)日：1987-11-13
申请号：JP10519086
申请日：1986-05-08
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , MORIFUJI MOTOYOSHI , KOYAMA KATSUTO
IPC分类号： H04L27/152 , H03L7/06 , H04L27/14
摘要： PURPOSE:To execute the high speed of a transient response, to decrease a code waveform distortion and to stabilize a direct current reproducion by making coincident the average frequency of two reference signals and the average frequency of an FSK wave input signal and selecting the difference in the frequency of two reference signals to 1.1-1.5 times of the modulating frequency transition of the FSK wave input signal. CONSTITUTION:Oscillators 4 and 5 to function as a reference signal source respectively give the reference signal of a high frequency fH and the reference signal of a low frequency fL to a gate circuit 3. For an FSK wave input signal received by an input terminal 1, a logical calculation is executed at the section of the rectangular feeding- back signal from a frequency-dividing device 6 by an exclusive 'or' circuit 2, a phase comparing signal is outputted and given to a gate circuit 3 and an output terminal 7. The gate circuit 3, when the phase comparing signal is a high level, gives the output signal of the oscillator 4 to the frequencydividing device 6, and when the signal is a low level, gives the output signal of the oscillator 5 to the frequency-dividing device 6. The average frequency of two reference signals and the average frequency of the FSK wave input signal are made coindident and the difference in the frequency of two reference signals is selected to 1.1-1.5 times of the modulating frequency transition of the FSK wave input signal.

10. 发明专利

JPH0546172B2 失效
公开(公告)号：JPH0546172B2
公开(公告)日：1993-07-13
申请号：JP2255787
申请日：1987-02-04
申请人： YAGI ANTENNA
发明人： KANEKO YOICHI , MORIFUJI MOTOYOSHI , TAKAHASHI AKIRA , ISOTANI MASAHARU , NOGUCHI TAIICHIRO
IPC分类号： H02H9/06 , H02H9/04

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