VHF/UHF antenna for nanosatellite
VHF/UHF antenna for nanosatellite
(OP)
i want to design UHF/UHF antenna for nanosatellite. specific frequency use is 144-146 MHz for VHF and 430-440 MHz for UHF. Anyone can give me some advise or formula to calculated it,what type of material and type of antenna suitable to used. the dimension for satellite is 30cm X 30cm X 30cm. Thanks





RE: VHF/UHF antenna for nanosatellite
Have you browsed the AMSAT website ?
Also, Google the 'Oscar' and RS-... satellites.
RE: VHF/UHF antenna for nanosatellite
1) does the antenna need to fit onto your satellite and lay flat against a 30x30 cm face? or can it extend outside of your volume. If it's mounted on your surface, how thick can it be, how heavy also?
2) antenna pattern shape? if the satellite spins, is this antenna suppose to be omni-directional. What's the Antenna Polarization? linear or circular?
3) Material depends partly on your satellite orbit location, LEO, MEO, GEO, etc.
Wavelength in inches is 11,803/Frequency in MHz.
Hence you have 82 inches at the low end and 27 inches for the high freq.
At 144 Mhz, that's an 0.15 wavelength antenna. That will be much more difficult to design than the higher frequency antenna.
If you can have these antennas pop up or uncoil, then little wire antennas or VE1BLL's tape measure shape would make life easy and low cost.
kch
RE: VHF/UHF antenna for nanosatellite
this is more information about the antenna i want to design.
1) the antenna will extend outside of the satellite and will deploy after it reach at orbit.
2)Antenna pattern shape is in omni-directional because we use 3-stability axis.
3)the antenna polarization still don't consider but maybe we'll use vertically polarization or horizontally polarization waves.
4) satellite will be located at LEO orbit at 600 km from earth.
if i want to use dipole for my antenna it is suitable to use Flexible steel tape?. to calculate the length Flexible steel tape can i use this formula 2952V/FMhz (1/4 wavelength)
v= coaxial cable velocity factor
may u give suggestion website that i can find more about Flexible steel tape propeties and price of this material?
RE: VHF/UHF antenna for nanosatellite