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1982 Vol. 4, No. 6

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Articles
A NEW mm WAVE GUNN OSCILLATOR PHASE-LOCKING METHOD
Chen Jin-Yuan
1982, 4(6): 325-330.
Abstract:
Reference [1] concluded that for the phase-locking of Gunn Oscillator, timing by varying the bias voltage on the diode is not a practical method. However the author of this paper successfully realized the 8mm (35 GHz) phase-locking standard fre-quenc...
THE RESEARCH ON SHORT BACKFIRE ANTENNA
Lin Chang-Lu, Song Xi-Ming
1982, 4(6): 331-336.
Abstract:
In this paper, a method of analysing the short backfire antenna is proposed. Using this method, a new type backfire antenna is developed. Its gain is about 2.5 dB higher than that of a normal short backfire antenna.
THE OVERVOLTAGE PROTECTION OF SILICON RECTIFIERS
Fan Yuan-Wu
1982, 4(6): 337-345.
Abstract:
In this paper, the causes and the suppression methods of the overvoltages in silicon rectifiers are described. The selection methods of the metal oxide, varistors are described also. These suppression methods are also useful to other semiconductor de...
THE NEGATIVE RESISTANCE BREAKDOWN EFFECT IN VVMOS POWER TRANSISTOR
Ji Chao-Ren, Xu Zhi-Ping, Zhao Guo-Zhu
1982, 4(6): 346-353.
Abstract:
VVMOS transistor is a new type of high frequency power MOS transistor with vertical channels at the surface of the V-groove. Like other MOSFET s, one of the important features is no secondary breakdown, However, these is negative resistance breakdown...
THE MODIFICATION OF THE METHOD FOR DESIGNING THE FILTER TYPE OUTPUT CIRCUIT OF BROADBAND KLYSTRONS AND THE CALCULATION OF GAP INTERACTION IMPEDANCE
Ding Yao-Gen, Zhu Yun-Shu
1982, 4(6): 354-364.
Abstract:
In this paper, we propose a new eriterion and a method for designing filter type output circuit of broadband klystrons. From this, we ean obtain an output section which satisfies the requirement of klystron designs, and have good impedance-band-width...
CYCLOTRON RESONANCE MASER OSCILLATOR
Liao Zheng-Jiu
1982, 4(6): 365-371.
Abstract:
In this paper, the electrodynamic system, working principle and characteristics of a few different kinds of CRM-oscillators have been analyzed and compared. The analysis shows that two-resonant cavity synchronous CRM-oscillator with external signal a...
THE PHYSICAL CHARACTERISTICS OF A SMALL SPHERICAL ABERRATION SEPTIER S ELECTROSTATIC LENS FOR ELECTRON OR ION BEAM FOCUSING
TU Li-Shan
1982, 4(6): 372-383.
Abstract:
As a small spherical aberration eleetrostatic lens Septier s lens has been proved to be an almost ideal structure by a number of experiments. This paper provides a meth-od of calculating all the physical characteristics of Septier s electrostatic len...
RAPID-MEASUREMENT OF PULSE EMISSION CURRENT AT THE INFLECTION POINT ON I-U CURVE OF THE THERMIONIC CATHODE
Yang Ling-Yun, Wang Shu-Shen
1982, 4(6): 384-389.
Abstract:
Pulse emission current at the inflection point on I-U curve of a thermionie eathode can be measured rapidly by means of a circuital technique. This method can prevent the eathode from suffering injury during the measurement. So that it can be used to...
A NEW EMPIRICAL FORMULA FOR CALCULATING THE TRANSITION TEMPERATURES OF A-15 SUPERCONDUCTORS
Zeng Qing-Lin
1982, 4(6): 390-392.
Abstract:
A new empirical formula for calculating the Tc, of A-15 supereonductors is presented and it reads: Tc=N TA/M1/2(rA/rB) (e/a), where Nnumber of atoms,N = 4 for A3B compounds; TA the superconductive transition temperature of the A element; Mthe. averag...
THE SAPPHIRE WINDOW FOR GYROTRON
Shi Shao-Ming
1982, 4(6): 393-396.
Abstract:
In this paper, a eircular-circular pillbox type sapphire window used in circullar waveguide transmitting system which consists of 8 mm band gyrotron oscillator is described.