Ultra wideband bandpass filters with specified relative bandwidth-Reference-Cited by-同舟云学术

Ultra wideband bandpass filters with specified relative bandwidth

Published:2021-01-01 Issue:1-2 Volume:76 Page:9-16
ISSN:0016-1136
Container-title:Frequenz
language:en
Short-container-title:

Author:

Nesic Dusan¹,Milosevic Tomislav²,Kolundzija Branko³

Affiliation:

1. Centre of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade , Njegoseva 12 , Belgrade , Serbia

2. WIPL-D d.o.o. , Gandijeva 7 , 11073 Belgrade , Serbia

3. School of Electrical Engineering, University of Belgrade , 73 Bulevar kralja Aleksandra , 11020 Belgrade , Serbia

Abstract

Abstract Algorithm for the realization of the broad range of values of wide relative bandwidth (RBW) bandpass filter is introduced. Algorithm is based on periodic ideal cells each with short-ended stub. Theory is developed for a symmetrical cell with proportional transmission lines, nonuniform or uniform, in term of characteristic impedance. The theory is applied for the uniform transmission lines. Simple equation of the ratio between characteristic impendence of the short-ended stub and the characteristic impendences of the main lines is given for the broad range of RBW. Realizable filters are for the very wide RBW up to over 1.5 (150%). Technology is chosen in microstrip with vias for the short ends. It is without coupling, without defected ground structure (DGS) and only with a single layer. The procedure is tested on the fabricated filters for very wide RBW of 1.5 (150%). Agreement between measurements and simulations is excellent.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering

Link

https://www.degruyter.com/document/doi/10.1515/freq-2021-0034/pdf

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