摘要:

AbstractTransmission‐line cascades are shown to exhibit the properties of a generator and resonance detector for a class of nonsinusoidal microwave signals. In providing a strong analogy to a well‐known phenomenon in the sinusoidal domain, this generator‐resonator matching is suggestive of possible applications in communications‐systems tec

ISSN:0098-9886    

DOI:10.1002/cta.4490050402

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe continued fraction expansion of the ordinary Bessel polynomials is modified by replacing the complex frequency variablepbyp/(1+γp), where γ=⩾0. The resulting polynomials, when a reactance transformation is applied, are capable of providing bandpass filters with an approximately flat group delay respo

ISSN:0098-9886    

DOI:10.1002/cta.4490050403

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

年代:1977

数据来源: WILEY

摘要:

AbstractVarious methods for designing multidimensional digital filters exhibiting approximately circular, spherical or hyperspherical attenuation symmetry are discussed. It is shown how, by means of appropriate series expansions, symmetry requirements for filters with any number of dimensions can be fulfilled with arbitrary precision by adopting transformations of correspondingly increased degree. Some of these transformations are generalizations of the known McClellan transformation. Simple means for ensuring excellent symmetry at frequencies remote from the origin are presented.

ISSN:0098-9886    

DOI:10.1002/cta.4490050404

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

年代:1977

数据来源: WILEY

摘要:

AbstractA rational 2‐port model of a class of taperedLCandRClines which includes the exponential, hyperbolic, trigonometric and square, or Bessel, lines is presented. The model for the exponentialRCline (ERC), considered as an example, accurately describes the actual frequency and transient response for various values of taper factor over wide ranges of frequency and time. In anERCnotch network configuration, application of this model predicts the results very closely for various values of taper facto

ISSN:0098-9886    

DOI:10.1002/cta.4490050405

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

年代:1977

数据来源: WILEY

摘要:

AbstractForRC‐active filters of the ‘follow‐the‐leader’ feedback type, a synthesis procedure is presented that is suitable for application also to the general case in which differently tuned biquadratic functional blocks are used. Their losses can either be concentrated in one of the blocks, or given by a prescribed dis

ISSN:0098-9886    

DOI:10.1002/cta.4490050406

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

年代:1977

数据来源: WILEY

摘要:

AbstractSloped commensurate transmission‐line functions realizable with stubs and cascaded lines 1/8 wavelength long are presented. These functions may be applied to synthetizing matching networks required for slope compensation in microwave amplifiers. Examples for the broadband design of 7–14 GHz chip 1 μm gate f.e.t. and 4–8 GHz packaged f.e.t. amplifiers are

ISSN:0098-9886    

DOI:10.1002/cta.4490050407

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe building block for the new generalized immittance inverter is a 3‐port known as the active hybrid network. One of its ports is bidirectional, and matches a design admittance y0. The second port operates in the send, while the third port operates in the receive direction. The hybrid is constructed from an op‐amp and a 5‐port network composed of a few resistors and the design admittance y0. There are two versions of the hybrid: the voltage‐inverting (i.h.) and the noninverting hybrid (n.i.h.).The inverter consists of an i.h. and an n.i.h. connected at their unidirectional ports in a loop. The gyration admittances are actual driving‐point admittances in the circuit, namely the design admittances y0, y'0of the two hybrids. Such an inverter, when terminated at its output port by a load admittancey, will give at its input port an input admittance yin= y0y'0/y.Expressions are derived for theyparameters of the inverter at higher frequencies, thus accounting for the finite bandwidth of the op‐amp.Two special cases are particularly treated, and experimental results are obtained for them. The first is the case of the resistive gyrator, for which y0and y'0are pure conductances. The second is the case of the capacitive gyrator, for which y0and y'0are pure capacitive susceptances. The capacitive gyrator is used to produce the supercapacitor, or f.d.n.r., and the results of measurements on a number of f.d.n.r. network

ISSN:0098-9886    

DOI:10.1002/cta.4490050408

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

年代:1977

数据来源: WILEY

摘要:

AbstractWhen dealing with filters with very stringent specifications, even the best predistortion techniques fail, because they all deal only with the natural modes, on the assumption that the losses produce a performance degradation mainly in the passbands. A new technique is proposed that is shown to be also effective with stringent specifications.

ISSN:0098-9886    

DOI:10.1002/cta.4490050409

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

年代:1977

数据来源: WILEY

摘要:

AbstractRecently, a method has been developed by means of which canonic wave digital filters can be derived from originally noncanonic ladder wave digital filters. This method applies only to wave digital filters which are derived from pureLC‐ladder reference filters. In the paper, it is shown how noncanonic wave digital filters corresponding to reference filters containing unit elements can be transformed such that a canonic realization of these filters can be obtained as wel

ISSN:0098-9886    

DOI:10.1002/cta.4490050410

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe continuously equivalent realizability of 3rd‐order real symmetric paramount matrices is discusse

ISSN:0098-9886    

DOI:10.1002/cta.4490050411

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

年代:1977

数据来源: WILEY