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On Miniaturization and Performance Improvement of Planar Wideband Bandpass Filters Without Coupled Lines
Date
2009-10-01
Author
Alicioglu, Bulent
Yıldırım, Nevzat
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Two classical approaches are compared in various respects for the design of wideband planar BPF's without parallel coupled lines, namely, BPF's designed by pole placement with contributing Unit Elements (UE) and inverter coupled resonator filters designed from LP prototypes. It is shown that the circuit obtained by direct BP synthesis is a special case of inverter coupled filter with inverters converted into single Unit Elements. It is also shown that if the inverters are converted into odd number of UE's then they become contributing UE's which can be used to improve skirt slopes considerably. For transversal size reduction and reshaping the stopband response, equivalent circuits of all-stub resonators are derived by starting from distributed element resonator models. The techniques are applied on a Unit Element coupled all-stub resonator BP filters resulting in wide spurious free stopbands with reduced size.
Subject Keywords
Noncommensurate filters
,
Planar filters
,
Microstrip filters
,
Miniaturized filters
,
Quasi lumped filters
URI
https://hdl.handle.net/11511/55159
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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BibTeX
B. Alicioglu and N. Yıldırım, “On Miniaturization and Performance Improvement of Planar Wideband Bandpass Filters Without Coupled Lines,” presented at the 37th European Microwave Conference, Rome, ITALY, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55159.