| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Back reflection-type surface-acoustic-wave light modulator using an optical modulation method and optical modulation method | JP5322888 | 1988-03-07 | JP2678456B2 | 1997-11-17 | 寛 下田平; 雅也 名波; 幸一郎 宮城 |
| 122 | Spread spectrum demodulator | JP237092 | 1992-01-27 | JPH0559991U | 1993-08-06 | 美紀 高久 |
| (57)【要約】 【目的】 構成部品の特性のバラツキ等の影響によりＦ
ｉｎｅ／Ｃｏａｒｓｅモード間で相関点が一致しない場合に信号ディレイを調整し、受信信号を適切に復調することで正確なトラッキングを可能にするスペクトラム拡散復調装置を得る。 【構成】 ０／π復調コード発生部と直交０／π復調コード発生部のＦｉｎｅモード出力にそれぞれ遅延器を接続し、モード間で相関点が一致しない場合に信号ディレイを調整する。 【効果】 ＣｏａｒｓｅモードとＦｉｎｅモードで相関点が一致しない場合、各復調コード発生部のＦｉｎｅモード出力に接続した遅延器でモード間の相関点を一致させことができるため、適切なトラッキングが可能となる。 |
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| 123 | Liquid crystal base composite material having enhanced microwave double refractivity | JP21247091 | 1991-08-23 | JPH04245803A | 1992-09-02 | KUUN CHIENGU RIMU; JIEI DEIBITSUDO MAAJIRAMU; ANNA EMU RATSUKUNAA; RUROI JIEI MIRAA |
| PURPOSE: To change the microwave refractive index of a phase modulation medium by preparing a microwave phase modulation cell and controllably aligning grains and liquid crystal dispersed into the phase modulation medium. CONSTITUTION: The microwave phase modulation cell 31 is provided with a microwave waveguide 32. An internal cavity 34 in the waveguide 42 is filled with a composite material dispersing conductive long grains into liquid crystal. A polarized microwave beam is led through the waveguide 32 and entered into the waveguide 32 through a window 35. The refractive index of the composite medium in the waveguide 32 about the microwave beam is controlled by adjusting voltage V1, V2. The phase speed of the microwave is changed in accordance with the change of voltage and the refractive index of the medium in the phase modulation cell 31 is also changed. COPYRIGHT: (C)1992,JPO | ||||||
| 124 | Phase modulation of microwave by liquid crystal | JP21246991 | 1991-08-23 | JPH04234202A | 1992-08-21 | KUUN CHIENGU RIMU; JIEI DEIBITSUDO MAAJIRAMU; ANNA EMU RATSUKUNAA; RUROI JIEI MIRAA |
| PURPOSE: To obtain a compact and inexpensive phase modulation method by forming a microwave phase modulation cell and leading a microwave energy beam through the cell to control the alignment of liquid crystal and change the refractive index of a phase modulation medium. CONSTITUTION: The inside of a cavity 26 formed in a waveguide is filled with a phase modulation medium consisting of a liquid crystal and a pair of opposed electrodes 32 and a pair of opposed magnetic poles 38 are formed on the side faces of the waveguide 22 to form a microwave phase modulation cell 20. When a microwave energy beam is led into the waveguide 22 in a microwave propagation direction 34 and voltage V1 between the electrodes 32 and the voltage V2 of a winding around the magnetic pole 30 are changed, the alignment of the liquid crystal is changed and the microwave refractive index of the phase modulation medium is also changed. Thus the phase modulation of a microwave can be compactly and inexpensively executed by using the double refraction by the microwave. COPYRIGHT: (C)1992,JPO | ||||||
| 125 | Microwave vector modulator | JP17897291 | 1991-06-25 | JPH04233806A | 1992-08-21 | BERUNARUDO IYOZEFU RAITSU |
| PURPOSE: To provide a reflection-type microwave vector modulator having a small loss which is used for matching of a microwave load and can handle a large quantity of energy. CONSTITUTION: This microwave vector modulator 4 provided with an adjustable reflection means which adjustably reflects at least a part of incident microwave radiation obtains adjustable reflection by semiconductor surfaces 18, 19, 20, and 21 irradiated by light emitting means 24, 25, 26, and 27. A microwave load matching device provided with this vector modulator and an orthogonal phase detector prevents reflection from penetrating receiver branches. COPYRIGHT: (C)1992,JPO | ||||||
| 126 | Apparatus for reflecting radio wave | JP33935389 | 1989-12-27 | JPH03199990A | 1991-08-30 | OZAKI CHOJIRO |
| PURPOSE: To obtain the reflecting quantity and reflecting direction of a radio wave corresponding to data by controlling the position of a radio wave absorbing screen controlling the reflecting quantity and direction to a radio wave level and that of a radio wave refracting filter changing the route of a radio wave. CONSTITUTION: A servo actuator 3 receives an input signal to be operated. This input signal is applied to an input circuit 9 at first from the outside of the apparatus and subsequently encoded by an encoder circuit 8. Next, the encoded signal is shaped in its waveform by a waveform shaping circuit 7 and modulated by a modulator 6 to be applied to an actuator 3. By this constitution, a radio wave absorbing screen 2 and a radio wave refracting filter 4 are rotated by the actuator 3 to be arranged at a desired position. The incident radio wave to a spherical dielectric radio wave lens 1 and the reflected radio wave from a reflecting plate 5 are partially or totally absorbed by the screen and further refracted by the filter 4 to obtain the reflecting quantity and direction of the radio wave corresponding to data to be transmitted. COPYRIGHT: (C)1991,JPO&Japio | ||||||
| 127 | Optical fsk optical frequency shift stabilizing circuit | JP19233788 | 1988-08-01 | JPH0241043A | 1990-02-09 | NAKANISHI KENJI; IWASHITA KATSU |
| PURPOSE: To make the optical frequency shift stable in the optical FSK modulation system by controlling a laser diode so that the frequency shift of the optical FSK signal is made coincident with the frequency of an electric or optical periodic filter. CONSTITUTION: An FSK signal light 21 obtained from a laser diode 15 is divided into two by a coupler 23. The one is extracted as an output signal light 25 and the other is subject to FM-AM conversion by a Mach Zender interferrometer 27 being an optical periodic filter. Then the two output lights from the interferrometer 27 are received by photodiodes 29 1, 29 2 and their difference signal is divided into two. The one is given to an optical path length control section 31 and the other is given to a mixer 35 through a DC interrupter 33. Then a mixer 35 multiplies a signal through the DC interrupter 33 with a digital electric signal 11, and the result is outputted, which is given to a programmable attenuator 37, where the amplitude of a digital electric signal 11 is controlled. COPYRIGHT: (C)1990,JPO&Japio | ||||||
| 128 | Rf modulator | JP9545588 | 1988-04-20 | JPH01268212A | 1989-10-25 | KAWASE TSUTOMU; FUKAI YOSHIHITO |
| PURPOSE:To easily obtain nonfluctuating stable amplitude and phase characteristics by constituting the title RF modulator by forming a transformer which is used as a modulating means by inserting an insulating plate and conductor plates only. CONSTITUTION:The transformer T2 used for the modulating means of this RF modulator is constituted by inserting the insulating plate 13 and conductor plates L2 and L3 into the hole of a magnetic core 6, with the insulating plate 13 being put between the conductor plates L2 and L3. Namely, the transformer T2 can be assembled easily by using the conductor plates L2 and L3 respectively put on both sides of the insulating plate 13 instead of the conventional example which is formed inserting a conductor coated with an insulating film into the hole of the magnetic core 6 and installing a winding around the conductor. Moreover, when the electric wiring is previously performed by using a main body of a printed circuit board, an RF modulator having no fluctuation in amplitude and phase characteristics can be formed. | ||||||
| 129 | Modulator of electromagnet wave | JP21822288 | 1988-08-31 | JPH01152432A | 1989-06-14 | DOMINIKU DERAKUURU; MISHIERU PAPIYUSHIYON; JIYANNPOORU POSHIYOOYU |
| PURPOSE: To obtain a modulator having a pass band wider than the pass band of a standard modulator for electromagnet waves in a medium IR range or far IR range by including a first layer between two layers of a second kind of semiconductor materials and forming all these layers in such a manner that the wave to be modulated and a control wave cross the all layers. CONSTITUTION: This quantum structure has the layer 2, M b of the first kind of the semiconductor material and the two layers 1 and 3, M a, of the second kind of the semiconductor material disposed on both sides of the layer 2. The width of the forbidden band of the layers 1 and 3 is E ga and the width E gb of the forbidden band of the layer 2 is narrower than the width E ga of the forbidden band. The difference in the width between these two forbidden bands is distributed between a transmission band and valency band at ratios approximate to 65% and 35%, respectively. The formation of the wells of the potential for the electrons in the transmission band and the formation of the wells for the holes in the valency bands are made possible by combining the layers of these three semiconductor materials having the widths of the different forbidden bands. As a result, the application to an optical device to be actively led in the range of the medium IR rays or far IR rays is made possible. COPYRIGHT: (C)1989,JPO | ||||||
| 130 | Fm modulation circuit | JP30027487 | 1987-11-30 | JPH01143406A | 1989-06-06 | ISHIKAWA TAKASHI |
| PURPOSE:To utilize effectively the band of a transmission line by applying FM modulation by a carrier having a frequency being a multiple of N with respect to a prescribed carrier, eliminating the lower side band and applying 1/N frequency division so as to exclude the disturbance due to the lower side band of the FM wave. CONSTITUTION:A video signal inputted from an input terminal 1 is modulated by a frequency being twice the prescribed carrier by an FM modulator 2. The lower side band in the video signal band of the FM signal modulated by the double frequency is eliminated by an HPF 3 and the carrier frequency is frequency-divided to 1/2 by a 1/2 frequency divider 4. Thus, the FM demodulation signal without being disturbed by the lower side band of the FM signal is obtained without modifying the prescribed constitution of the demodulation side devices. | ||||||
| 131 | JPS643086Y2 - | JP13461187 | 1987-09-04 | JPS643086Y2 | 1989-01-26 | |
| 132 | JPS6367891U - | JP13461187 | 1987-09-04 | JPS6367891U | 1988-05-07 | |
| 133 | Frequency modulation spectroscope using double frequency modulation and detection | JP18533987 | 1987-07-24 | JPS6347624A | 1988-02-29 | TOOMASU FURANSHISU GARAGAA; GEARII ROBAATO JIYANITSUKU; KURINTON BURATSUDOREE KAARISUR |
| 134 | Ultrasonic optical modulator | JP18233486 | 1986-08-01 | JPS6337314A | 1988-02-18 | KITAHARA TADASHI |
| PURPOSE: To modulate the intensity of a light beam by an arbitrary frequency by constituting the titled optical modulator, of an acousto-optical medium, the first and the second ultrasonic wave generating means, and an exciting means for generating the same ultrasonic traveling waves whose propagation directions are diametrically opposite to each other by exciting the first and the second ultrasonic wave generating means. CONSTITUTION: On the upper face of each ultrasonic transducer 1, 2, gold is vapor-deposited. By impressing a high frequency on electrodes 1a, 2a, a longitudinal ultrasonic wave is generated, and in an acoustic medium, ultrasonic beams of USW-1 and USW-2 are formed. Silver pate for forming an absorber layer 3 for preventing a reflection by absorbing the ultrasonic beam USW-1 is applied to a part opposed to the first ultrasonic transducer 1 of the second plane F 2. In the same way, silver paste for forming an absorber layer 4 for preventing a reflection by absorbing the ultrasonic beam USW-2 is applied a part opposed to the second ultrasonic transducer 2 of the first plane F 1. That is to say, by opposing the absorber layers, an ultrasonic resonator is not constituted between the first plane F 1 and the second plane F 2. COPYRIGHT: (C)1988,JPO&Japio | ||||||
| 135 | Responder and identification of moving body | JP15310386 | 1986-06-30 | JPS638578A | 1988-01-14 | MAKIMOTO MITSUO; ANDO AKIRO |
| PURPOSE: To increase the service time of a portable responder with the realization of an amplitude modulator extremely low in the power consumption, by mounting a variable capacity diode on an oscillator connected to an antenna to vary oscillation frequency with voltage of a modulation signal. CONSTITUTION: An antenna 12 is connected to an oscillator 14 directly or through a connection path while a varactor diode 15 is mounted on the oscillator 14 to vary the oscillation frequency with voltage of a modulation signal and a nonmodulation wave to be inputted from the antenna 12 is subjected to an amplitude modulation to be reradiated. With such an arrangement, the capacitance across terminals of the varactor diode 15 varies with the voltage levels VH and VL at a modulation input terminal 19 but little current flows because of a reverse bias. In addition, the oscillation frequency varies with changes in the capacitance thereby allowing the impedance of the oscillator viewed from the antenna 12 to change to the position A for the voltage level VL and the position B for the voltage level VH as shown by the Smith's chart. COPYRIGHT: (C)1988,JPO&Japio | ||||||
| 136 | Control circuit of oscillating frequency | JP4412283 | 1983-03-18 | JPS59171330A | 1984-09-27 | SAITOU TAKESHI; NAGASHIMA TOSHIO |
| PURPOSE:To attain frequency control of an oscillator at a frequency band which is difficult to realize like a prescaler or the like by observing a reflected amount at a mixer input terminal of a single signal of a frequency band to control the oscillating frequency of the other frequency bands. CONSTITUTION:An RF signal inputted from an RF signal input terminal 1 is outputted from the 1st RF signal output terminal of a directional coupler 2 and inputted to a mixer 3. This RF signal is frequency-converted by an exciting signal from a frequency variable oscillator 4 of voltage control type, selected by a band pass filter 5 as an intermediate frequency signal and applied to a termination resistor 7 being a load. The sum of fRP and fOSC is fIF at an intermediate frequency signal output section of the mixer 3. That is, the reflection by the band pass filter 5 of the intermediate frequency signal is minimzed when the fOSC is changed to the fRF and the sum is the fIF. The level of the RF signal is minimized also in this case, the minimized level is detected by a detector 6 to control the oscillating frequency of the voltage controlled oscillator 4. | ||||||
| 137 | JPS5728220B2 - | JP10682776 | 1976-09-08 | JPS5728220B2 | 1982-06-15 | |
| 138 | JPS5535004B2 - | JP2597376 | 1976-03-10 | JPS5535004B2 | 1980-09-11 | |
| 139 | Light emitting element drive circuit | JP11774677 | 1977-09-30 | JPS5451452A | 1979-04-23 | FUJIWARA HARUO; MOTEGI MITSUHIRO |
| PURPOSE: To establish the light emitting element driving circuit with stable operation by a simple constitution, by providing the transistor TR and the light emitting element and by providing the circuit constitution in which either of TR or light emitting element is turned ON of OFF and the constant current absorbing section. CONSTITUTION: When the input signal of the input terminal In is at high level, TR1 is turned on, but the current flowed to the light emitting element LD is slight and most of the current is flowed to the constant current absorbing section TR3. When the input signal at low level, TR1 is turned OFF and the current of the constant current absorbing section TR3 is flowed to the element LD. Thus, with the input signal in high level, TR1 is turned ON and the element LD is turned OFF, and with the input signal of low level, TR1 is turned OFF and the element LD is turned ON, causing the input pulse signal into photo pulse signal. Thus, without fluctuating and increasing the power consumption the driving circuit for the light emitting element performing stable operation can be obtained COPYRIGHT: (C)1979,JPO&Japio | ||||||
| 140 | Light modulation system | JP13206076 | 1976-11-02 | JPS5356957A | 1978-05-23 | KUNIDA MASANORI |
| PURPOSE: To make it possible to measrure the response of a receiving system by modulation and inputting the reference coltage of automatic electric power control loop as the function signal together the pulse signal. COPYRIGHT: (C)1978,JPO&Japio | ||||||
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