Premium
Design and implementation of inverse legendre microstrip filter
Author(s) -
Kant Rajni,
Gupta Nisha
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30225
Subject(s) - chebyshev filter , legendre polynomials , passband , stopband , mathematics , inverse , elliptic filter , legendre function , associated legendre polynomials , mathematical analysis , low pass filter , filter (signal processing) , prototype filter , control theory (sociology) , topology (electrical circuits) , electronic engineering , band pass filter , computer science , engineering , geometry , classical orthogonal polynomials , combinatorics , gegenbauer polynomials , orthogonal polynomials , control (management) , artificial intelligence , computer vision
The inverse Legendre filter response is derived and its property is analysed by providing the magnitude specifications in the passband and stopband. The inverse Legendre function requires the identical order n as its Legendre counterpart. A quantitative comparison is carried out between Chebyshev, inverse Chebyshev, Legendre and inverse Legendre to show the improved characteristics of the inverse Legendre filters depending on specifications and criteria. The inverse Legendre filter shows maximally flat characteristic in the passband and in comparison to other filters, it exhibits improved group delay characteristics. Finally, the filter is implemented in microstrip low pass configuration and a prototype model of the proposed filter configuration is developed and measured. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:69–73, 2017