摘要:

AbstractThe design, fabrication, and performance of a Ka‐band, two‐stage, low‐noise hybrid amplifier (LNA) are discussed. The LNA's extremely wide‐band measured performance is state of the art with a gain exceeding 10 dB from 14 to 37 GHz and a noise figure less than 3 dB from at least 27 to

ISSN:0895-2477    

DOI:10.1002/mop.4650050102

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

年代:1992

数据来源: WILEY

摘要:

AbstractThe mixed transmission of digital and analog signals via single‐mode fiber has potential in future fiber‐optic systems. We have studied the effect of chirping of the baseband digital signal on the analog subcarrier channels using computer simulation. If the location of the subcarriers or the bias of the laser is selected properly, the SNR penalty due to chirping and cross talk will be less than 0.5

ISSN:0895-2477    

DOI:10.1002/mop.4650050103

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis article investigates the radiation characteristics of microstrip patch antennas located at arbitrary angular positions. The aperture method was employed to determine the radiated far field of the patch. A circular arrangement of the patch antennas was studied. The effect of the array configuration on the radiation characteristics are presented and analyzed.

ISSN:0895-2477    

DOI:10.1002/mop.4650050104

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis article introduces a model for high‐power microwave bipolar transistors and its associated parameter‐measuring strategy, whose inclusion of thermal phenomena in the dc characterization allows a good estimate of the device's thermal resistance to be obtained. This type of model provides important capabilities for solid‐state radar transmitter d

ISSN:0895-2477    

DOI:10.1002/mop.4650050105

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

年代:1992

数据来源: WILEY

摘要:

AbstractIn this study, the finite‐element method is used to simulate the steady‐state slider‐induced convection of the confined melt cavity. The flux distribution within the melt cavity is analyzed and the relative momentum transfers on the poly GaAs melt and GaAs‐melt interface are calculated for several kinds of cavity geometries. It is found that the amount of momentum transfer is related to the skew angle of the cavity, and therefore, proper choice of the cavity angle is

ISSN:0895-2477    

DOI:10.1002/mop.4650050106

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

年代:1992

数据来源: WILEY

摘要:

AbstractDenoting g(x + iy) = 1/αβ sn2(x + iy, k0) ‐ A/sn2(x + iy, k0) ‐ A/βA = 1 + α/1 ‐ α/βandk20= (1 ‐ α/β)/(1 + α)2we find an equipotential of constant electric intensity to form a new type of TEM transmission line for industr

ISSN:0895-2477    

DOI:10.1002/mop.4650050107

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

年代:1992

数据来源: WILEY

摘要:

AbstractThe second harmonic power generation efficiency (SHPGE) obtained under phase‐matching conditions in organic crystal‐cored fibers having different cladding materials have been investigated. It has been found that a very high SHGPE can be obtained under certain conditi

ISSN:0895-2477    

DOI:10.1002/mop.4650050108

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

年代:1992

数据来源: WILEY

摘要:

AbstractThe narrow beams with very low sidelobes are generated from an array of nonidentical elements. The array considered in the present work is found to be more advantageous than the array of identical elements in terms of main beamwidth and side‐lobe levels, excitation levels being uniform in both case

ISSN:0895-2477    

DOI:10.1002/mop.4650050109

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

年代:1992

数据来源: WILEY

摘要:

AbstractWe present certain novel characteristics of the radiation pattern of a chirostrip dipole antenna which consists of a short horizontal dipole antenna on a grounded chiral substrate. Chiral materials are characterized by constitutive relationsD= ϵeE+ iϵcBandH=B/μc+ iϵeE. In our theoretical analysis we show that the radiation pattern of a simple chirostrip horizontal dipole undergoes a rotation around the axis normal to the substrate and that this rotation depends on the value of the chirality iϵe. Applications of this novel antenna are menti

ISSN:0895-2477    

DOI:10.1002/mop.4650050110

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

年代:1992

数据来源: WILEY

摘要:

AbstractAnalytical expressions for the efficient computation of sensitivities with respect to fundamental periods in dynamic nonlinear characteristics under multitone excitation are presented. Almost‐periodic oscillations in the forced Van der Pol oscillator are computed to illustrate the capability and efficiency of the resulting harmonic balance techniqu

ISSN:0895-2477    

DOI:10.1002/mop.4650050111

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

年代:1992

数据来源: WILEY