What does the science say? - Brigham Young University
What does the science say? - Brigham Young University
What does the science say? - Brigham Young University
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<strong>What</strong> <strong>does</strong> <strong>the</strong> <strong>science</strong> teach us?<br />
• Line-‐of-‐sight propaga0on<br />
– frequency dependent components in link budget<br />
• Mul0path propaga0on<br />
– earth bounces as a func0on of frequency<br />
– impact of antenna gain padern<br />
– scadering as a func0on of frequency<br />
• Tracking<br />
• Line-‐of-‐sight propaga0on: rain, atmospheric adenua0on, and o<strong>the</strong>r<br />
(e.g., cable, connector, etc.) are higher at C-‐band, <strong>the</strong> rest is “a<br />
wash” for same dish size and receiver noise figure.<br />
• Mul0path propaga0on is a lidle less severe at C-‐band, but changes<br />
more rapidly for <strong>the</strong> same transmider velocity.<br />
• Tracking: ini0al acquisi0on is harder, steady-‐state tracking<br />
performance depends on control loop parameters.<br />
• Steady-‐state tracking performance can be beder in mul0path-‐<br />
prone areas.<br />
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