摘要:

AbstractMode multiplexing, a method for transmitting two signals in one fiber without time‐ or wavelength multiplexing, is presented in theoretically and experimentally. It is shown that two mode‐coded channels can be launched and separated using optical directional couplers with enhanced mode selectivity combined with a simple signal processing unit. © 1993 John Wiley&sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650060202

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractA novel feeding arrangement allows the parabolic reflector to radiate efficiently without the need of any loads or terminations. Radiation characteristics were examined over a 10:1 bandwidth. © 1993 John Wiley&sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650060203

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractParasitic component effects on the gain of GaAs FETs are described. Numerical simulation shows that the frequency range of the unstable region (K<1) of an FET decreases as gate resistance, drain resistance, or source inductance increases, and as source resistance decreases. The increase of gate or drain resistance does not affect MSG but does reduce MAG. The increase of source inductance or resistance reduces MSG and MAG. The Mag degradation is due to the decrease of |y21/y12| for the source resistance and the increase of K for the other parasitics. These findings should be helpful in the design and analysis of microwave GaAs FETS. © 1993 John Wiley&sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650060204

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractWe propose a new technique to solve the integral equation for wave scattering by an axisymmetric inhomogeneity using the conjugate gradient (CG) method together with the fast Fourier‐Hankel transforms (FFHT). The method uses fast Hankel transform (FHT) and fast Fourier transform (FFT) requiring only O(N log N) floatingpoint operations per iteration and O(N) storage. © 1993 John Wiley&sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650060205

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn accurate method of measuring the complex permittivity of high‐loss liquids like water by use of a waveguide perturbation technique is presented. The sample taken in a thin capillary tube of low‐loss material is inserted in the S‐band waveguide cavity. Resonance frequency and frequency shift are measured with a H. P. network analyzer and the complex permittivity is calculated. This method is particularly useful in the case of high‐loss liquids. Another advantage of this method is that only a very small quantity of liquid is needed for the study. © 1993 John Wiley&s

ISSN:0895-2477    

DOI:10.1002/mop.4650060206

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn optical area‐coded scheme is proposed to implement three‐variable fuzzy logic based on the shadow‐casting technique on one stage. In particular, no thresholding device is required. Experimental results are also given. © 1993 John Wiley&son

ISSN:0895-2477    

DOI:10.1002/mop.4650060207

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractAn expression of the RCS of a partially coated scatterer to evaluate the effects of absorbent materials and the deviation from physical similarity between models and prototype for lack of requiring absorbent materials in model testing has been given. A comparison between theoretical and experimental values for a conducting cylinder partially coated with absorbent materials has shown good agreement. © 1993 John Wiley&sons, Inc

ISSN:0895-2477    

DOI:10.1002/mop.4650060208

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractHere we study electromagnetic properties of thin layers of novel pseudochiral synthetic materials, described by bianisotropic constitutive relations. Approximate boundary conditions are given to model plane layers and to simplify electromagnetic analysis. Properties of waves in a strip line on a two‐layer ferrite‐pseudochiral substrate are studied and examples of prospective uses of pseudochiral composites are suggested. © 1993 John Wiley&sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650060209

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractA new photodiode model for circuit simulation has been developed for use in feasibility and performance studies on silicon integrated fiber‐optical detector systems. The model includes optical absorption and signal current generation from three regions: surface layer, space charge layer, and substrate. This article describes the diode model and includes simulation results for an integrated silicon fiberoptic detector system with ECL outputs, useful for optical interconnect applications such as on‐board clock distribution. Results are included for both the diode itself, showing its multipole response and the complete circuit. © 1993 John Wiley&sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650060210

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractWe report on the design of a 45° incidence diplexer to be used in a millimeter‐wave radiometer. This equipment will be flown on a low‐orbiting satellite and should analyze the natural emissions of the Earth and the atmosphere in the bands around 90, 157, and 183 GHz. The diplexer has been realized with two grids of tripoles arranged in an equilateral triangular lattice and printed on both sides of a quartz slab. Experimental data are presented that are in good agreement with the theoretical predictions. © 1993 John Wiley&sons

ISSN:0895-2477    

DOI:10.1002/mop.4650060211

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY