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RF front end P. Gorham UH

A N I T A. RF front end P. Gorham UH. highpass. In band, ~0.3dB over most of band, 3db at 180MHz, <-60dB 110MHz. lowpass. New spec, best of the lot at -60dB 1610 MHz (Iridium). Component sequence. Antenna --> low loss cable (LMR400 or Heliax), ~1m: expect <30K from cable & connectors

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RF front end P. Gorham UH

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  1. A N I T A RF front endP. GorhamUH

  2. highpass • In band, ~0.3dB over most of band, 3db at 180MHz, <-60dB 110MHz

  3. lowpass • New spec, best of the lot at -60dB 1610 MHz (Iridium)

  4. Component sequence • Antenna --> low loss cable (LMR400 or Heliax), ~1m: • expect <30K from cable & connectors • Into noise diode -20dB coupler, ==> -0.3dB? ==> • ~30K, incl connectors • Bandpass filters: • -0.3 - -0.8 dB ==> 50K • Coupler thru SMA & minibend into LNA. LNA ==> • ~80-100K, incl. Connectors • Design requirement is therefore 200K, goal 150K.

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