Modeling, design, fabrication, and performance of rectangular μ-coaxial lines and components

D. S. Filipovic, Z. Popovic, K. Vanhille, M. Lukic, S. Rondineau, M. Buck, G. Potvin, D. Fontaine, C. Nichols, D. Sherrer, S. Zhou, W. Houck, D. Fleming, E. Daniel, W. Wilkins, V. Sokolov, J. Evans

Research output: Contribution to journalConference articlepeer-review

49 Scopus citations


A miniature non-uniform copper-air rectangular coaxial line with the inner conductor supported by periodic dielectric straps is demonstrated. The overall height of the line is 310μm with the outer conductor cross-section being 250μm×250μm. The measured loss is 0.22dB/cm at 26GHz, while the isolation between two parallel lines with a center-to-center separation of 700μm is better than 60dB. Several quasi-planar components are designed and fabricated on the same wafer, and presented here are a branch-line hybrid and a transmission line resonator. The through and coupled port transmissions for the hybrid at 26GHz are -3.25dB and -3.35dB respectively, with phase misbalance below 0.2°. The transmission line resonator has an unloaded Q-factor of 110 at 25 GHz.

Original languageEnglish (US)
Article number4015187
Pages (from-to)1393-1396
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
StatePublished - 2006
Event2006 IEEE MTT-S International Microwave Symposium Digest - San Francisco, CA, United States
Duration: Jun 11 2006Jun 16 2006


  • Branch line hybrid
  • Coaxial line
  • Computer aided design
  • Transmission line resonator

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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