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1 results

  • A modified Jerusalem microstrip filter and its complementary for low phase noise X-band oscillator

  • Hamed Nimehvari Varcheh, Pejman Rezaei, Sina Kiani
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 15 / Issue 10 / December 2023
    Published online by Cambridge University Press:
    23 June 2023, pp. 1707-1716
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  • This article shows the design of two different low phase noise (LPN) planar X-band frequency oscillators using two various microstrip filters (MFs). These two MFs act as a frequency stabilization part in the loop of the microwave oscillator. The first one, the modified Jerusalem MF (MJ-MF), is based on the Jerusalem scheme. The second one, the complementary modified Jerusalem MF (CMJ-MF), is complementary of the MJ-MF. Finally, by employing the branchline coupler, the LPN MF oscillator is achieved. The MJ-MF (narrowband filter) LPN X-band oscillator operates at 8.17 GHz and denotes a phase noise (PN) of −161 dBc/Hz at 1-MHz frequency offset. The CMJ-MF (wideband filter) LPN X-band oscillator operates at 8.14 GHz and mentions a PN of −157 dBc/Hz at 1-MHz frequency offset.