A dual-notched band bandpass filter using embedded fold-slots

2012 ◽  
Author(s):  
Mongkol Meeloon ◽  
Matinee Rattarasarn ◽  
Sarawuth Chaimool ◽  
Prayoot Akkaraekthalin
Keyword(s):  
Bandpass Filter ◽  
Notched Band

A compact UWB bandpass filter with a notched band using a multistubs loaded resonator

2016 ◽  
Vol 27 (1) ◽  
pp. e21054
Author(s):  
Ting Zhang ◽  
Fei Xiao ◽  
Jingfu Bao ◽  
Xiaohong Tang
Keyword(s):  
Bandpass Filter ◽  
Notched Band

Fractal-based triangular bandpass filter with a notched band for interference rejection in wideband applications

Circuit World ◽  
2019 ◽  
Vol 45 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Karthie S. ◽  
Salivahanan S.
Keyword(s):  
Communication Systems ◽  
Bandpass Filter ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Low Cost ◽  
Area Network ◽  
Interference Rejection ◽  
Content Type ◽  
Notched Band ◽  
Low Cost Substrate

Purpose This paper aims to present the design of a novel triangular-shaped wideband microstrip bandpass filter implemented on a low-cost substrate with a notched band for interference rejection. Design/methodology/approach The conventional dual-stub filter is embedded with simple fractal-based triangular-circular geometries through various iterations to reject wireless local area network (WLAN) signals with a notched band at 5.8 GHz. Findings The filter covers a wide frequency band from 3.1 to 8.8 GHz and has a fractional bandwidth of 98 per cent with the lower passband of 57.5 per cent and upper passband of 31.6 per cent separated by a notched band at 5.8 GHz. The proposed wideband prototype bandpass filter is fabricated in FR-4 substrate using PCB technology and the simulation results are validated with measurement results which include insertion loss, return loss and group delay. The fabricated filter has a sharp rejection of 28.3 dB at 5.8 GHz. Measured results show good agreement with simulated responses. The performance of the fractal-based wideband filter is compared with other wideband bandpass filters. Originality/value In the proposed work, a fractal-based wideband bandpass filter with a notched band is reported. The conventional dual-stub filter is deployed with triangular-circular geometry to design a wideband filter with a notched band to suppress interference signals at WLAN frequency. The proposed wideband filter exhibits smaller size and better interference rejection compared to other wideband bandpass filter designs implemented on low-cost substrate reported in the literature. The aforementioned wideband filter finds application in wideband wireless communication systems.

Compact differential bandpass filter with a narrow notched band using APCL structure suitable for UWB application

2015 ◽  
Vol 46 (9) ◽  
pp. 869-874 ◽  
Author(s):  
Mohsen Amirian ◽  
Gholamreza Karimi ◽  
Ali Lalbakhsh ◽  
Mohammad-sajad Bayati
Keyword(s):  
Bandpass Filter ◽  
Notched Band
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