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    • 1. 发明专利
    • JJTYPE ANTENNA
    • JPS558145A
    • 1980-01-21
    • JP8080878
    • 1978-07-03
    • MIZUTANI PURINTEKUSU KKTAKEMOTO HIROSHI
    • TAKEMOTO HIROSHI
    • H01Q1/12H01Q9/30H01Q9/32H01Q21/00H01Q21/20
    • PURPOSE:To secure an easy matching even with a big change of the antenna capacity with installation of the arrester circuit as well as the vertical attachment of both the radiation element of 3/4 wavelength and the matching element of 1/4 wavelength onto the metal basement to be earthed. CONSTITUTION:Both radiation element 29 of 3/4 wavelength and matching element 34 of 1/4 wavelength formed with the metal pipe of an appropriate diameter are attached vertically onto earthed metal basement 30 with a constant parallel space kept between the two elements. At the same time, feed matching element 31 and 34 formed by the metal pipe are attached to basement 30 via insulator 32 and a parallel space secured between. Furthermore, element 34 is attached to circular arc type slit 33 centering on element 29 formed on basement 30 via nut 35 in such way that the space can be adjusted to element 31. In such constitution, the steady non- directive radiation of the vertically polarization is obtained at the area of 1/2 wavelength of element 29. In addition, the degree of lightning arrest is increased since element 29 and 34 can be attached directly onto basement 30.
    • 5. 发明专利
    • DIELCTRIC QUARTER WAVELENGTH EXCITATION WAVEGUIDE BODY ANTENNA DEVICE
    • JPH0774530A
    • 1995-03-17
    • JP22024193
    • 1993-09-03
    • MIZUTANI PURINTEKUSU KKTAKEMOTO HIROSHI
    • TAKEMOTO HIROSHI
    • H01Q9/30
    • PURPOSE:To obtain an antenna device whose beam widths not only in a horizontal direction but also in a vertical direction are large and which is small-sized and light in weight by providing a waveguide body and a matching conductor. CONSTITUTION:When a waveguide body 5 is located in the almost spherical electric field formed by a dielectric quarter wavelength excitation antenna ANT, high frequency current is flowed to the inner peripheral surface of the waveguide body 5. The high frequency current is flowed also to the outer peripheral surface of the waveguide body 5, an electric field is generated in a right angle direction to the magnetic field generated on an outer peripheral surface and the electric field is radiated as an electromagnetic wave. The part of the electric field is reflected by the inner peripheral surface, resonance energy is increased by concentrating on the antenna and the electric field itself generated from the antenna is intensified. Further, a radiation electric field is enlarged to the whole vertical direction and a vertical radiation pattern becomes a cocoon shape. A conductor 6 which is electrically connected with the waveguide body 5 and extending in the opposite direction to the antenna and in parallel with a power feeding body 1 is provided, the unbalance of the flouing of high frequency current is eliminated and the antenna ANT is made to be matched.
    • 7. 发明专利
    • DIELECTRIC 1/4 WAVELENGTH-EXCITING ANTENNA
    • JPH05102720A
    • 1993-04-23
    • JP34490491
    • 1991-12-26
    • MIZUTANI PURINTEKUSU KKTAKEMOTO HIROSHI
    • TAKEMOTO HIROSHI
    • H01Q9/30
    • PURPOSE:To obtain a subminiature dielectric 1/4 wavelength-exciting antenna with high sensitivity and stability. CONSTITUTION:An outer circumferential electrode 2, a one end face electrode 3 and an inner circumferential electrode 4 are provided respectively on a part of an outer circumferential face of a dielectric-made cylinder 1, one end face and an inner circumferential face. Other part of the outer circumferential face is made to be dielectric part 5, and the length of the dielectric part 5 and the length of the outer circumferential electrode 2 are set to be a proper ratio. One end of a feeding conductor 6 having a proper diameter is connected to the center conductor 8 of a connection plug 7 and the other end of the feeding conductor 6 is connected and fixed to the inner circumferential electrode 4 with a fixing methallic fixture 10 so as to be coaxial to the inner circumferential electrode 4. Thus, the antenna is provided exclusively for the transmission/ reception to constitute the bidirectional simultaneous communication system.
    • 8. 发明专利
    • UHF BAND OSCILLATOR
    • JPH0354904A
    • 1991-03-08
    • JP19120089
    • 1989-07-24
    • MIZUTANI PURINTEKUSU KKTAKEMOTO HIROSHI
    • TAKEMOTO HIROSHI
    • H03B5/18
    • PURPOSE:To obtain a compact, light and highly stable UHF band oscillator by constituting the UHF band oscillator of a Colpitts oscillator using a microstrip line and a transistor(TR) respectively as a resonance circuit element and a base resonance circuit. CONSTITUTION:The variable voltage VV of a 10-revolution herical potentiometer VR2 whose voltage can be adjusted is connected to a through capacitor C9 and supplied to a varrier cap diode VD1 through resistor R2 resistor R1 U-shaped resonance circuit 4 to vary the capacity of the diode VD1. The helical potentiometer VR1 applies a proper voltage to the base of a TR TR1 to adjust the current of the collector. When voltage is applied to the collector through a high frequency choke coil RFC, serial resonation occurs through capacitor C1 element 4 diode VD1, oscillation voltage appears on a resistor R3 to be the emitter and the voltage is fed back to the collector through the capacitor C2 to oscillate the oscillator.