1. ANITA SMEX Final Presentation 2-November-2004 1 RF front end P. Gorham UH A N I T A

2. ANITA SMEX Final Presentation 2-November-2004 2 highpass In band, ~0.3dB over most of band, 3db at 180MHz, <-60dB 110MHz

3. ANITA SMEX Final Presentation 2-November-2004 3 lowpass New spec, best of the lot at -60dB 1610 MHz (Iridium)

4. ANITA SMEX Final Presentation 2-November-2004 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.