Where not available, analysis such as Finite Element analysis were use for a large number of points and interpolated. Concerning accuracy: where available, exact solutions were used. It include plotting of various parameters. LineComp was developed to meet the need for transmission line and coupled transmission line analysis and synthesis. They are also dscussed in the book: Modern RF and Microwave Filter Design. Parfil and Elliptic are featured in an article in Microwaves & RF magazine, entitled “Software tool proves merit for filter design”. At lower frequencies, capacitors can be used for the cross coupling. Due to phase cancellation an elliptic type response is achieved from this filter design approach. Folding a filter so that rods or lines couple between internal rods is known as cross-coupling. Adding rods or lines which couple to the first and last filter rods provides two additional zeros to achieve the desired elliptic filter response. Elliptic includes design information for both cross-coupled and elliptic filters. Įlliptic provides design capability for elliptic filter frequency response. Companies who have purchased Parfil in the past, including major filter companies continue to purchase upgrade copies. Parfil has been sold to hundreds of companies worldwide and has been considered the most accurate design software available. Almost all of these designs can be done for a variety of media including microstrip, stripline, rectangular bar, round rod, shielded microstrip, and suspended substrate. It can design coupled coax line filters and high dielectric constant combline ceramic filters. Parfil has been significantly upgraded including capability for design of flat group delay filters and for designs with an intervening opening between rods. It also designs transmission line filters for low-pass, high-pass, band-pass and band-stop filters. Parfil designs parallel-coupled, interdigital, combline, hairpin, and bandstop filters. It also has an analysis program which can accept designs from the synthesis programs allowing for combining designed filters with other microstrip components as resistors, capacitors, amplifiers, etc. W aveCon offers a variety of synthesis programs for design of both coupled line filters and transmission line filters including programs for elliptic filters and cross-coupled filters. Refer to the specific hardware or target manual for information on these options. Software for Filter Design and Circuit and Analysis If you have installed external hardware or targets that interact with FDATool, you may see additional options in FDATool. Saving and Opening Filter Design Sessionsīelow is a brief introduction to the FDATool that will give you a better understanding of how it can be used.Setting the Filter Design Specifications.Opening the Filter Design and Analysis Tool.This chapter contains the following sections, which walk you through a typical filter design session using the FDATool: You can use FDATool as a convenient alternative to the command line filter design functions. FVTool, which can be launched from FDATool, provides a separate window for analyzing filters. FDATool also provides tools for analyzing filters, such as magnitude and phase response plots and pole-zero plots. FDATool enables you to quickly design digital FIR or IIR filters by setting filter performance specifications, by importing filters from your MATLAB workspace, or by directly specifying filter coefficients. The Filter Design and Analysis Tool (FDATool) is a powerful user interface for designing and analyzing filters. Note The Filter Design and Analysis Tool (FDATool) requires resolution greater than 640 x 480. Filter Design and Analysis Tool (Signal Processing Toolbox) Signal Processing Toolbox
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