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Band-stop filter with suppression of requested number of spurious stopbands

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2017
2259.pdf (602.8Kb)
Authors
Nešić, Dušan
Kolundzija, Branko M.
Article (Published version)
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Abstract
Design method for band-stop filters (BSFs) that suppress a requested number of spurious bandstops and reduce ripples in the passbands below similar to 1 dB is proposed. BSF is designed in a form of a cascade of cells, each consisting of steps of equal electrical length, where the number of steps is used to control the number of suppressed spurious bandstops. Analytical formulas are developed that enable initial design of BSF for a given central frequency, depth, and bandwidth of the stopband. Varying the minimum characteristic impedances of initial cells, through an optimization using circuit simulation, the ripples in passbands are reduced below similar to 1 dB. Using the proposed theory, three filters in microstrip technology, with suppression of 3, 5, and 7 spurious stopbands respectively, were designed, fabricated, and measured. Good agreement between simulated and measured results has been observed. The proposed design can be recommended for filters having broad stop bandwidths, b...etween 40 and 100%.

Keywords:
Band-stop filter / Suppression of spurious stop-bands / Microstrip
Source:
International Journal of Microwave and Wireless Technologies, 2017, 9, 5, 995-1002
Publisher:
  • Cambridge Univ Press, Cambridge
Funding / projects:
  • Algorithms and software for frequency-domain and time-domain simulations of RF subsystems and electromagnetic sensors in ICT (RS-32005)

DOI: 10.1017/S1759078716001070

ISSN: 1759-0787

WoS: 000400963000004

Scopus: 2-s2.0-84988411005
[ Google Scholar ]
1
1
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/2261
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Nešić, Dušan
AU  - Kolundzija, Branko M.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2261
AB  - Design method for band-stop filters (BSFs) that suppress a requested number of spurious bandstops and reduce ripples in the passbands below similar to 1 dB is proposed. BSF is designed in a form of a cascade of cells, each consisting of steps of equal electrical length, where the number of steps is used to control the number of suppressed spurious bandstops. Analytical formulas are developed that enable initial design of BSF for a given central frequency, depth, and bandwidth of the stopband. Varying the minimum characteristic impedances of initial cells, through an optimization using circuit simulation, the ripples in passbands are reduced below similar to 1 dB. Using the proposed theory, three filters in microstrip technology, with suppression of 3, 5, and 7 spurious stopbands respectively, were designed, fabricated, and measured. Good agreement between simulated and measured results has been observed. The proposed design can be recommended for filters having broad stop bandwidths, between 40 and 100%.
PB  - Cambridge Univ Press, Cambridge
T2  - International Journal of Microwave and Wireless Technologies
T1  - Band-stop filter with suppression of requested number of spurious stopbands
VL  - 9
IS  - 5
SP  - 995
EP  - 1002
DO  - 10.1017/S1759078716001070
ER  - 
@article{
author = "Nešić, Dušan and Kolundzija, Branko M.",
year = "2017",
abstract = "Design method for band-stop filters (BSFs) that suppress a requested number of spurious bandstops and reduce ripples in the passbands below similar to 1 dB is proposed. BSF is designed in a form of a cascade of cells, each consisting of steps of equal electrical length, where the number of steps is used to control the number of suppressed spurious bandstops. Analytical formulas are developed that enable initial design of BSF for a given central frequency, depth, and bandwidth of the stopband. Varying the minimum characteristic impedances of initial cells, through an optimization using circuit simulation, the ripples in passbands are reduced below similar to 1 dB. Using the proposed theory, three filters in microstrip technology, with suppression of 3, 5, and 7 spurious stopbands respectively, were designed, fabricated, and measured. Good agreement between simulated and measured results has been observed. The proposed design can be recommended for filters having broad stop bandwidths, between 40 and 100%.",
publisher = "Cambridge Univ Press, Cambridge",
journal = "International Journal of Microwave and Wireless Technologies",
title = "Band-stop filter with suppression of requested number of spurious stopbands",
volume = "9",
number = "5",
pages = "995-1002",
doi = "10.1017/S1759078716001070"
}
Nešić, D.,& Kolundzija, B. M.. (2017). Band-stop filter with suppression of requested number of spurious stopbands. in International Journal of Microwave and Wireless Technologies
Cambridge Univ Press, Cambridge., 9(5), 995-1002.
https://doi.org/10.1017/S1759078716001070
Nešić D, Kolundzija BM. Band-stop filter with suppression of requested number of spurious stopbands. in International Journal of Microwave and Wireless Technologies. 2017;9(5):995-1002.
doi:10.1017/S1759078716001070 .
Nešić, Dušan, Kolundzija, Branko M., "Band-stop filter with suppression of requested number of spurious stopbands" in International Journal of Microwave and Wireless Technologies, 9, no. 5 (2017):995-1002,
https://doi.org/10.1017/S1759078716001070 . .

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