A Multiharmonic Absorption Circuit Using Quasi-Multilayered Striplines for RF Power Amplifiers

Yasuo Morimoto, Takeshi Yuasa, Tetsu Owada, Yukihiro Tahara, Hiroaki Miyashita, Moriyasu Miyazaki, Mohammad Memarian, Tatsuo Itoh

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A multiharmonic absorption circuit utilizing the quasi-multilayered striplines is presented. The circuit consists of a multiharmonic reflection filter, a broadband bandpass filter, and a termination. The novel quasi-multilayered striplines, which consist of alumina substrates stacked using solder balls, provide flexibility in the filter structure and realize low insertion loss at the fundamental frequency. The measured results of the fabricated filter exhibit an insertion loss of less than 0.47 dB at the fundamental operation frequency in C-band, as well as high absorption of the second, third, and fourth harmonics, thus outperforming existing solutions. In addition, the device is compact, with a size of only 0.21 λ0 × 0.39 λ0, where λ0 is the free space wavelength at C-band.

Original languageEnglish
Article number7605555
Pages (from-to)109-118
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number1
Publication statusPublished - 2017 Jan
Externally publishedYes


  • Multiharmonic absorption
  • quasi-multilayered striplines
  • substrate-stacked structure

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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