摘要:

AbstractIn this article simple closed‐form are presented expressions to compute the diffraction loss of open resonators composed of spherical mirrors of circular cross‐section. These expressions, which are based on the numerical results of scalar theory, should be useful in designing mirror size for open resonators. Experiments are conducted at W band to demonstrate the accuracy of the expressions. © 1992 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650050902

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis article reports a new experimental design technique for GaAs FET frequency multipliers based on harmonic load‐pull measurements [1]. The choices of biasing point, input power level, and load impedances at the fundamental and harmonic frequencies are examined to optimize the conversion gain and the multiplier power efficiency. This technique was validated by designing a 2.5–7.5‐GHz frequency tripler, using the NE 71083 GaAs FET. The performance of the frequency tripler built in MIC technology was found comparable to the multiharmonic load‐pull results and simulation results. © 1992 John Wiley&S

ISSN:0895-2477    

DOI:10.1002/mop.4650050903

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

年代:1992

数据来源: WILEY

摘要:

AbstractWe have developed a computer‐efficient algorithm and the related CAD‐oriented software to calculate the transverse propagation delays in a GaAs/AlGaAs MODFET. The model has been used to study the dependence of these delays on the various MODFET parameters. The results can be utilized for the optimization of high‐speed circuits. © 1992 John Wiley&Son

ISSN:0895-2477    

DOI:10.1002/mop.4650050904

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

年代:1992

数据来源: WILEY

摘要:

AbstractA lumped capacitance equivalent circuit is used to characterize the asymmetric edge‐coupled microstrip discontinuity in the case in which the conducting strips are embedded in a multilayered anisotropic medium. The Galerkin method in the spectral domain is employed to determine the excess charge density on the strips of the discontinuity. Original results are provided for the general asymmetric discontinuity in conventional and suspended configurations. © 1992 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650050905

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

年代:1992

数据来源: WILEY

摘要:

AbstractSimulated and experimental data on mixer performance of semiconductor alloy ramp heterostructure diodes are presented. The results indicate that these devices are excellent candidates for use in microwave and millimeter‐wave mixer circuits. In addition, they possess several significant advantages over contending Schottky barrier diodes, the microwave industry workhorse for mixers and detectors. © 1992 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650050906

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

年代:1992

数据来源: WILEY

摘要:

AbstractA new technique for exciting 2 × 2 subarray of linearly tapered slot antennas (LTSAs) with coplanar waveguide (CPW) is presented. rf power is coupled to each element through a CPW‐to‐slotline transition by a coax‐to‐CPW in‐phase four‐way radial power divider. The transition and the power divider are coupled by a novel nonplanar CPW right‐angle bend. Measured results at 18 GHz show excellent radiation patterns and return‐loss characteristics. © 1992 Joh

ISSN:0895-2477    

DOI:10.1002/mop.4650050907

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

年代:1992

数据来源: WILEY

摘要:

AbstractA new calibration method for the four‐port reflectometer is presented and has been applied at Ka band. Some experimental results are given. They show that the present method has a simple and rapid calibration procedure and has the same measurement accuracy as the one in [1]. © 1992 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650050908

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

年代:1992

数据来源: WILEY

摘要:

AbstractA technique for continuous operation of a dual‐mode tunable laser with a compound grating‐grating external cavity is presented. Double‐wavelength operation is obtained. The two modes of the laser can be independently tuned to achieve mode spacing frequencies from 130 to 370 GHz. Possible ways to increase this range are also discussed. This technique may be useful for millimeter‐wave generation by optical mixing. © 1992 John Wiley&S

ISSN:0895-2477    

DOI:10.1002/mop.4650050909

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

年代:1992

数据来源: WILEY

摘要:

AbstractWe describe a simple, novel method for generating 1‐D phase profiles with variable optical path. 2‐D planar curves are used as input objects, and a narrow slit as a spatial filter. The output is a transparent structure with variable optical path difference. Experimental results are shown. © 1992 John Wiley&Sons,

ISSN:0895-2477    

DOI:10.1002/mop.4650050910

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

年代:1992

数据来源: WILEY

摘要:

AbstractThis design improves the authors' previous work by including losses in the nonlinear medium. Unlike other all‐optical switches, the nonlinear region for soliton interaction in this design is much shorter. This provides greater flexibility on the choices of nonlinear material as well as reduction of the threshold soliton power. The coupling between the signal and control beams is included in our numerical experiments. © 1992 John Wiley&Sons, I

ISSN:0895-2477    

DOI:10.1002/mop.4650050911

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

年代:1992

数据来源: WILEY