A Balanced Dual-Band BPF with High CM Suppression and Improved Selectivity

Autor:	Xiaowei Shi, Yue Haojie, Feng Wei
Rok vydání:	2019
Předmět:	Materials science business.industry 0202 electrical engineering electronic engineering information engineering Optoelectronics 020206 networking & telecommunications 02 engineering and technology Multi-band device Electrical and Electronic Engineering business Selectivity
Zdroj:	Frequenz. 73:261-265
ISSN:	2191-6349 0016-1136
DOI:	10.1515/freq-2018-0243
Popis:	In this paper, a balanced dual-band bandpass filter (BPF) is designed based on microstrip folded stepped impedance split ring resonators (SISRRs) and balanced microstrip/slotline transition structures. The center frequencies and the fractional bandwidths (FBWs) of the two differential-mode (DM) passbands can be tuned by changing the physical lengths of two SISRRs and the gaps between the two resonators, respectively. The balanced microstrip/slotline transition structures can achieve a wideband common-mode (CM) suppression. Moreover, the DM passbands are independent from the CM responses, which significantly simplifies the design procedure. In addition, due to 0-degree feed structure and cross coupling structure, more transmission zeros can be realized, which can improve the passbands selectivity greatly. In order to validate the design strategies, a balanced dual-band BPF centered at 2.47 GHz and 5.21 GHz was fabricated and a good agreement between the simulated and measured results is observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b561dc287d5f0506f931b465055de4f https://doi.org/10.1515/freq-2018-0243 Zobrazit plný text záznamu