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

Mohsen Amirian, Gholamreza Karimi*, Ali Lalbakhsh, Mohammad Sajad Bayati

*Corresponding author for this work

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Abstract A compact differential band pass filter with asymmetric parallel-coupled lines (APCL) and center frequency of 5.6 GHz is proposed in this paper. The APCL suppresses unwanted RFID signals by introducing a fully tunable notched band at 6.8 GHz. By combining the concept of transmission matrix with modal analysis and extracting a novel model for symmetric three parallel coupled lines (SPCL), role of each resonant frequency is clearly explained. Measurement results in the differential mode show a pass band from 3.1 to 8.1 GHz and a wide stop band from 9.1 to 16 GHz with attenuation of more than 20 dB. In addition, S21 in common mode is lower than -10.5 dB over the pass band.

Original languageEnglish
Article number3856
Pages (from-to)869-874
Number of pages6
JournalMicroelectronics Journal
Volume46
Issue number9
DOIs
Publication statusPublished - 5 Aug 2015
Externally publishedYes

Keywords

  • Asymmetric parallel-coupled lines
  • Common mode suppression
  • Differential bandpass filter
  • Notch band
  • Ultra-wideband

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