Design of a dual‐band bandpass filter with a wide stopband. Issue 10 (1st May 2013)

• Record Type: Journal Article
• Authors: Tang, C.‐W.; Lu, H.X.; Tseng, C.T.
• Is Part Of: Electronics letters. Volume 49:Issue 10(2013)
• Page Start: 661
• Page End: 662
• Publication Date: 2013-05-01
• Subjects: band‐pass filters -- low‐pass filters; wide‐stopband dual‐band bandpass filter design -- modified coupled line‐low‐pass filters -- open stubs -- transmission zeros -- passband bandwidth; band‐pass filters -- low‐pass filters; wide‐stopband dual‐band bandpass filter design -- modified coupled line‐low‐pass filters -- open stubs -- transmission zeros -- passband bandwidth; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.0253
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A novel wide‐stopband dual‐band bandpass filter with a modified coupled line and lowpass filters is proposed. The modified coupled line is realised with two open stubs added to the conventional coupled line's open ends. With this proposed circuit, additional transmission zeros will appear around two passbands. Moreover, these predictable transmission zeros can be utilised to tune the two passbands' bandwidths. Furthermore, with the lowpass filter embedded, located at the input/output port, a wide stopband can be obtained. Finally, agreement between measurement and the theoretical prediction validates the proposed structure.