Development of EQM (engineering qualified model) local oscillator for Ka-band satellite transponder

Keun Kwan Ryu, Moon Que Lee, In Bok Yom, Seong Pal Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A low-phase-noise engineering qualified model (EQM) local oscillator (LO) has been developed for a Ka-band satellite transponder. A voltage controlled dielectric resonator oscillator (VCDRO) is designed using a high-impedance inverter coupled with a dielectric resonator to improve the phase-noise performances. This EQM LO was made as an environmental experiment for space application and applied to a Ka-band satellite transponder of the EQM level. The LO has harmonic suppression characteristics above 53 dBc and output power of 14.0 dBm ± 0.77 dB over the temperature range of -15+65°C. The phase noise characteristics are exhibited as -102.33 dBc/Hz at 10 KHz and -114.33 dBc/Hz at 100-KHz offset frequencies, respectively.

Original languageEnglish
Pages (from-to)198-200
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number3
StatePublished - 5 Feb 2004


  • EQM
  • Ka-band satellite transponder
  • Local oscillator
  • Phase noise


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