A low-cost microwave rotary joint

Pekka Eskelinen*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)


A simple and cheap coaxial microwave rotary joint covering frequencies from 1 to 21 GHz is described. Measured typical insertion loss is 0.7 dB, return loss stays better than 10 dB and the rotating torque requirement is 26 mNm. Maximum variation of attenuation as a function of rotating angle is 0.5 dB. Operation up to 37 GHz has been tried with loss values around 2 dB, typical.

Original languageEnglish
Title of host publication2014 International Radar Conference, Radar 2014
ISBN (Electronic)9781479941957
Publication statusPublished - 12 Mar 2014
MoE publication typeA4 Article in a conference publication
EventInternational Radar Conference - Lille, France
Duration: 13 Oct 201417 Oct 2014


ConferenceInternational Radar Conference
Abbreviated titleRadar


  • ball bearings
  • microwave connectors
  • microwave measurements
  • microwave transitions
  • radar components
  • rotary joint

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