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DINO Communications

DINO Communications. Considerations 3 antenna ideas Bent dipole Monopole Helix Timeline. Considerations. We only have a certain diameter surface to work with which rules out certain antennas (parabolic, etc.)

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DINO Communications

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  1. DINO Communications • Considerations • 3 antenna ideas • Bent dipole • Monopole • Helix • Timeline

  2. Considerations • We only have a certain diameter surface to work with which rules out certain antennas (parabolic, etc.) • We will not be able to encase an antenna in the internal structure of the satellite (horn, etc.) • Deployment of antennas • Budget

  3. Bent Dipole Antenna • Characteristics • 1.22dB (for this bent dipole simulation), however gain can improve to approximately 7dB. • 60 deg x 60 deg (typical half-power beam width, will vary with angle of dipole) • Frequency limits (3MHz to 500MHz) • Linear Polarization

  4. Bent Dipole Antenna • Bent Dipole with increased angle from wave propagation axis (z) • Provided a gain of 4.9dB • As angle was increased from z axis, worked up to a gain of approximately 7dB. However a certain point the dB gain decreased as bent dipole looked more like a dipole

  5. Monopole Antenna • Characteristics • -18dB gain along z axis and 2.3dB gain along y axis (for this monopole antenna) • 45 deg x 360 deg (typical half-power beam width) • No frequency limits • Linear polarization

  6. Helix Antenna • Characteristics • 10dB (typical gain) • 50 deg x 50 deg (typical half-power beam width) • 100 MHz to 3GHz (frequency limit) • Circular polarization • If used, special attention will need to be made as to the angle and position of a helix antenna on the satellite.

  7. Timeline • Rough link power budget by 11-22. Will help find required gain for our satellite antennas. • With gains approximated for satellite antennas, work on design of antennas by 12-6. • Write up of full antenna plan containing link power budget and 1st prototype antennas. (?)

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