Band-stop filter with suppression of requested number of spurious stopbands
Апстракт
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%.
Кључне речи:
Band-stop filter / Suppression of spurious stop-bands / MicrostripИзвор:
International Journal of Microwave and Wireless Technologies, 2017, 9, 5, 995-1002Издавач:
- Cambridge Univ Press, Cambridge
Финансирање / пројекти:
- Алгоритми и софтвер за симулације у фреквенцијском и временском домену RF подсистема и електромагнетских сензора у ICT (RS-MESTD-Technological Development (TD or TR)-32005)
DOI: 10.1017/S1759078716001070
ISSN: 1759-0787
WoS: 000400963000004
Scopus: 2-s2.0-84988411005
Институција/група
IHTMTY - 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 . .