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1987 Vol. 9, No. 4
Display Method:
1987, 9(4): 289-298.
Abstract:
A fast convergent series---Chebyshev-Bessel series for representing the radiation integral ofphysical optics is constructed. It can be effectively applied to analyse the radiation fields ofreflector antennas.
A fast convergent series---Chebyshev-Bessel series for representing the radiation integral ofphysical optics is constructed. It can be effectively applied to analyse the radiation fields ofreflector antennas.
1987, 9(4): 299-308.
Abstract:
The normalized cut-off frequencies of Eypq and Expq modes for image waveguide arc investigated by EDC method. A generalized mode chart for image waveguide is given. It is useful for determining the first-order higher mode and single mode region and c...
The normalized cut-off frequencies of Eypq and Expq modes for image waveguide arc investigated by EDC method. A generalized mode chart for image waveguide is given. It is useful for determining the first-order higher mode and single mode region and c...
1987, 9(4): 309-316.
Abstract:
A method based on the method of lines which discretizes a partial differential equation (PDE) into a system of ordinary differential equations (ODEs) is presented. A difference scheme with an error of O(h4) is introduced and a simple method for deter...
A method based on the method of lines which discretizes a partial differential equation (PDE) into a system of ordinary differential equations (ODEs) is presented. A difference scheme with an error of O(h4) is introduced and a simple method for deter...
1987, 9(4): 317-322.
Abstract:
The conditions for four lower modes existing in an insular dielectric waveguide are given. The parameters which affect the propagation properties Of the insular dielectric waveguide are selected optimally by the improved Orthogonal Array Table (OAT)....
The conditions for four lower modes existing in an insular dielectric waveguide are given. The parameters which affect the propagation properties Of the insular dielectric waveguide are selected optimally by the improved Orthogonal Array Table (OAT)....
1987, 9(4): 323-334.
Abstract:
In this paper, a new algorithm called incremental matrix algorithm for calculating sensitivities of network functions is presented. By use of this algorithm, both difference and differential sensitivity can be calculated. The algorithm can be used in...
In this paper, a new algorithm called incremental matrix algorithm for calculating sensitivities of network functions is presented. By use of this algorithm, both difference and differential sensitivity can be calculated. The algorithm can be used in...
1987, 9(4): 335-347.
Abstract:
A new method of calculating the large-chang sensitivity--hybrid matrix method is proposed. This method, is based on the hybrid matrix equation of the linear m-port network with controlled sources. It can be used for the circuits containing VCVS and C...
A new method of calculating the large-chang sensitivity--hybrid matrix method is proposed. This method, is based on the hybrid matrix equation of the linear m-port network with controlled sources. It can be used for the circuits containing VCVS and C...
1987, 9(4): 348-358.
Abstract:
The role of calcium oxide in the barium aluminate and that of calcium oxide and scandium oxide both doped in the impregnated barium aluminate cathode are analytically studied. The results indicate that there are common consitituents, i.e. 2BaO CaO Al...
The role of calcium oxide in the barium aluminate and that of calcium oxide and scandium oxide both doped in the impregnated barium aluminate cathode are analytically studied. The results indicate that there are common consitituents, i.e. 2BaO CaO Al...
1987, 9(4): 359-363.
Abstract:
For this probe, the beam spot diameter of the primary electron beam is 50-100m, the primary beam current is lower than 10-7A, and the energy of the primary electron (Ep) can be varied from 200 eV to 3 keV.By use of this probe, the secondary emission ...
For this probe, the beam spot diameter of the primary electron beam is 50-100m, the primary beam current is lower than 10-7A, and the energy of the primary electron (Ep) can be varied from 200 eV to 3 keV.By use of this probe, the secondary emission ...
1987, 9(4): 364-367.
Abstract:
This paper introduces the design and the manufacture of a new type gas discarge gun for the cathode luminescent instrument. It contains the decision of the operating model, the design of the discharge gun and the measurements of the gun performance. ...
This paper introduces the design and the manufacture of a new type gas discarge gun for the cathode luminescent instrument. It contains the decision of the operating model, the design of the discharge gun and the measurements of the gun performance. ...
1987, 9(4): 368-370.
Abstract:
Four classes of constant weight codes which can meet the Johnson upper bound and two classes of constant weight codes which are greater than the Graham lower bound are given in this paper.
Four classes of constant weight codes which can meet the Johnson upper bound and two classes of constant weight codes which are greater than the Graham lower bound are given in this paper.
1987, 9(4): 371-374.
Abstract:
It is important that the powermeter errors will exert a tremendous influence on the measuring accuracy of six-port reflector. To estimate this influence is very difficult. In this paper, Monte Carlo simulation analysis is used. As a practical example...
It is important that the powermeter errors will exert a tremendous influence on the measuring accuracy of six-port reflector. To estimate this influence is very difficult. In this paper, Monte Carlo simulation analysis is used. As a practical example...
1987, 9(4): 375-379.
Abstract:
A microwave polar interferometer using four-probe principle is presented, in which four-probe system is replaced by two T-junction waveguides in series with a tunable phase shifter between them. The interferometer is specially suitable for measuring ...
A microwave polar interferometer using four-probe principle is presented, in which four-probe system is replaced by two T-junction waveguides in series with a tunable phase shifter between them. The interferometer is specially suitable for measuring ...
1987, 9(4): 380-384.
Abstract:
Some new formulas for calculating the far zone field of antenna of any length excited by horizontal electric and magnetic sources on the infinite metallic elliptic and hyperbolic cylinders are presented. As an example, the radiation patterns for a st...
Some new formulas for calculating the far zone field of antenna of any length excited by horizontal electric and magnetic sources on the infinite metallic elliptic and hyperbolic cylinders are presented. As an example, the radiation patterns for a st...
