Higher order lumped element absorptive lowpass and bandpass filter structures

Tae Hak Lee, Boyoung Lee, Young Sik Kim, Ke Wu, Juseop Lee

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Here, the authors present a class of lumped-element low-pass and bandpass absorptive filter circuits. To begin with, the authors discuss a new type of absorptive low-pass filter (LPF) structure that has an excellent impedance matching performance in both passband and stopband. This work provides low-pass prototype values for the proposed absorptive LPFs in terms of those for the conventional reflective filters, namely g-parameters, so that the new type of absorptive LPF can be designed in a straightforward manner. In addition, it is shown that traditional low-pass-to-bandpass frequency transformations can be applied to the absorptive low-pass prototype cases in the design of absorptive bandpass filters (BPFs). Second- and third-order LPF and BPFs are designed and measured to verify the new type of absorptive filter and its design method.

Original languageEnglish
Pages (from-to)1166-1173
Number of pages8
JournalIET Microwaves, Antennas and Propagation
Issue number8
Publication statusPublished - 2019 Jul 3

Bibliographical note

Funding Information:
This work was supported by the Korea Government (Ministry of Science and ICT) through the National Research Foundation of Korea under Grant NRF-2018R1A2B6006095.

Publisher Copyright:
© The Institution of Engineering and Technology 2019.

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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