Broadband Networks

Abstract

The sections in this article are Filter or Insertion Loss Problem in View of Broadband Matching Analytic Solution of the Broadband Matching Problem Modern Approaches to Broadband Matching Problems: CAD Techniques—Real Frequency Solutions

Immitance data modelling via linear interpolation techniques: A classical circuit theory approach

“…In this case, the total number of circuit elements would be 24 + 24 = 48. On the other hand, in this modelling problem, our ultimate goal is to design a matching network between antenna and a source (single matching [1,2]). The model may be required to determine the theoretical gain-bandwidth limitations of the antenna over a wide band.…”

“…In this regard, the circuit model with 48 elements would unnecessarily complicate the problem. Moreover, each Foster Section would also contribute to the transmission zeros of the matched system [1,2]. Therefore, the transmission zeros, which are introduced for the sake of the interpolation of the Foster Part, may be super uous and impose artiÿcial restriction on the bandwidth of the matched system.…”

“…For example, models are required to analyse the electrical behaviour of the physical devices such as gain bandwidth limitations, determination of the noise ÿgure merits or power delivering capabilities, etc. [1,2]. Similarly, computer aided simulation of the communication sub-systems printed on VLSI chips, employs various kinds of models for the non-linear active and passive devices as well as interconnects [3][4][5][6][7][8][9][10][11][12].…”

Stable Factorization of Strictly Hurwitz Polynomials

“…In many microwave communication system design, modeling and simulation problems, description of lossless two ports in one or two kinds of elements is essential [5]. In the design of microwave matching networks, amplifiers or in modeling passive one port devices such as antennas, lossless two ports are either described in terms of driving point immitance or reflectance functions [6,7].…”

“…In the design of microwave matching networks, amplifiers or in modeling passive one port devices such as antennas, lossless two ports are either described in terms of driving point immitance or reflectance functions [6,7]. The methods known as Real Frequency Techniques (RFT) are excellent tools for design and modeling [5,8]. Once the independent descriptive parameters are selected, numerical implementations of real frequency techniques demands the construction of strictly Hurwitz polynomials.…”