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Ultra-Miniaturized Wideband Input-Absorptive Bandstop Filter Based on TFIPD Technology

  • Mengdan Kong
  • , Yongle Wu*
  • , Zheng Zhuang
  • , Weimin Wang
  • , Cong Wang
  • *Corresponding author for this work
  • Beijing University of Posts and Telecommunications
  • School of Electronics and Information Engineering, Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

This brief presents the ultra-miniaturized wideband input-absorptive bandstop filters with one and three transmission zeros using the thin film integrated passive devices (TFIPD) technology. It is based on a novel T-shape structure with lumped-element resonators and one resistor chained on the input port. The basic bandstop block composed of lumped-element resonators can be synthesized by the Chebyshev reflective prototype values ( g -parameters). In order to further expand the stopband bandwidth and improve the frequency selectivity, the series inductance and capacitance resonator (SICR) is loaded on the basic bandstop block, thus resulting in two extra transmission zeros. The chained resistor on the input port is used to absorb the input-signal power. For demonstration, the one-zero and three-zero design cases operating at 5 GHz are simulated, manufactured and measured, respectively.

Original languageEnglish
Article number9320547
Pages (from-to)2414-2418
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume68
Issue number7
DOIs
StatePublished - Jul 2021
Externally publishedYes

Keywords

  • Bandstop filter
  • input-absorptive
  • thin film integrated passive devices (TFIPD)
  • ultra-miniaturized
  • wideband

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