HTS Microstrip Hybrid Couplers for Radio Astronomy C-Band Receivers

  title={HTS Microstrip Hybrid Couplers for Radio Astronomy C-Band Receivers},
  author={Guoyong Zhang and M. J. Lancaster and Neil Roddis},
  journal={2007 IEEE/MTT-S International Microwave Symposium},
Critical upgrades of microwave hybrid directional couplers with wideband specifications in C band receiver for e-MERLIN telescope array at Jodrell Bank Observatory, UK, are required to achieve extremely low insertion loss and a reduction in receiver size. A High temperature superconducting (HTS) 3-section tandem coupled-line 3dB hybrid coupler and an HTS Lange coupler with a bandwidth of 53% and 48.5%, respectively, were designed on MgO substrates. The measured performance agrees well with the… CONTINUE READING
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