超高周波の研究について
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I. ON THREE PHASE ANTENNA This paper explains the antenna excited by 3-phase wave and contains the following items : 1. Fundamentals. (1) Characteristics of 3-phase antenna. (2) Excitation by 3-phase source. (3) Excitation by single phase source. (4) Arrangement of elements. 2. Antenna with Elements. arranged transversely and axially (1) Antenna with nondirective elements. (2) Antenna with elements arranged transversely (3) Antenna with elements arranged axially. (4) Shift of radiation beam by phase modulation 3. Antenna with Elements arranged symmetrically (1) Symmetrical 3-phase antenna (2) Unsymmetrical 3-phase antenna 4. Three Phase Receiving Antenna (1) Y antenna. (2) Bird's toes antenna. (3) Rake antenna. 5. Radiation Impedance of Three Phase Antenna. 6. Gain of Three Phase Antenna. References. II. ON SOME DWARF AND NOVEL ANTENNAS Those which require limited space and weight, such as aircrafts, automobiles, trains and ships, are in need of equipping with antennas light and compact. This paper describes some antennas which have elements shortened in length using folded, solenoidal or toroidal elements and dense in arrangement. The followings are the items contained by this paper. 1. Fundamentals. 2. Antenna with elements of equal length excited (a) in same phase (b) in alternate phase and (c) in polyphase. 3. Antenna with elements of unequal length excited (a) in same phase (b) in alternate phase (c) by travelling wave in normal order and (d) by travelling wave in alternate order 4. Screen antenna. 5. Ladder antenna. 6. Star antenna. 7. Sun antenna and its combined antenna References. III. ON SOME ULTRA HIGH FREQUENCY OSCILLATOR GIRCUiTS. This paper describes the experimental results on some U. H. F. oscillator circuits and contains the following items : 1. circuit with distributed constants consisting of parallel wires or rectangular, sinusoidal elliptic or circular parallel plates connected to (a) anode and grid (b) anode and cathode (c) grid and cathode (a) three electrodes of oscill ator valve i.e. Huth Kuhn circuit and (e) experimental results of examples. 2. B type circuit where grid of valve is connected to B source through biasing high resistance for the sake of simplifying circuit connections. 3. Conductor core circuit which has a coil with copper core instead of ferromagnetic core. 4. Earthed anode circuit where anode of valve is earthed through capacitance to avoid the effect of anode stray capacitance and danger of d.c. high volage shock. 5. U. H. F. three phase circuit which generates three phase oscillation. 6. Simple and convenient U. H. F. wave meter which is avairable to measure wave lengths ranging from 90 to 270 cms. References.
- 山形大学の論文
- 1951-10-01