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1 results

  • Q-band cross-coupled dielectric resonator filter using TM mode for satellite application

  • Ambrish Ghadiya, Shilpi Soni, Keyur Trivedi
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 10 / Issue 2 / March 2018
    Published online by Cambridge University Press:
    13 February 2018, pp. 235-241

  • A new structure of Q-band filter comprising rectangular high-permittivity dielectric resonators (DR) operating at TM11δ mode is introduced. The resonator shows high-quality factor (Q) and wide spurious free window compared with other technologies available at Q-band for realizing filters. Low permittivity ceramic material (quartz) is used as a support for holding DR at the center of the cavity. An eight-pole cross-coupled band-pass filter having a bandwidth of 225 MHz at 38.5 GHz was realized. Resonant coupling structure is introduced to realize cross-coupling in filter. The resonator assemblies were optimized precisely to achieve effective linear frequency drift over temperature of the order of 2 ppm/°C. The filter also survived severe sine and random vibration test for satellite application.