Vol. 117
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2023-06-09
Design of High-Performance Parallel-Connected Filters Using Chained Filtering Functions
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Progress In Electromagnetics Research M, Vol. 117, 105-118, 2023
Abstract
This paper presents a design of high-performance parallel-connected filters using the Chained filtering function. The filtering functions enable the placement of multiple return loss zeros at the same frequency, resulting in reduced sensitivity to fabrication tolerance and design complexity compared to traditional Chebyshev counterparts. To demonstrate the feasibility of this technique, a new filtering function (FN) based on Chained filtering function is derived, and prototypes of fourth and sixth-degree Chained function filters in a parallel-connected topology are designed and fabricated. The overall size of the filters is 2.5 cm x 4 cm (fourth degree) and 2.5 cm x 5 cm (sixth degree). The measured insertion and return losses are 2.833 dB and 16.150 dB (fourth degree), and 2.674 dB and 18.074 dB (sixth degree). The achievable selectivity of the filters is 78.17 (fourth degree) and 89.68 (sixth degree). This design technique can serve as a useful tool for filter design engineers in terms of implementation.
Citation
Francis Emmanuel Chinda, Socheatra Soeung, Muhammad Sani Yahya, Sovuthy Cheab, and Huzein Fahmi Hawari, "Design of High-Performance Parallel-Connected Filters Using Chained Filtering Functions," Progress In Electromagnetics Research M, Vol. 117, 105-118, 2023.
doi:10.2528/PIERM22112506
http://www.jpier.org/PIERM/pier.php?paper=22112506
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