Why are current dish satellite receivers smaller in diameter? What are the parts of a satellite dish?
2007-07-21 04:43:30 · 4 answers · asked by edgarec17 1 in Science & Mathematics ➔ Astronomy & Space
C band has a frequency of about 5 GHz and requires a bigger dish.
Ku band has a frequency of about 12 GHz and only needs the smaller dish.
Both frequencies are still in use with satellites today, but the Ku band is used more for the direct to home market.
Higher frequency is easier to focus and carries more energy.
A satellite receiver is basically a radio telescope. It uses a parabolic reflector (metal dish) to focus radio energy just like an optical telescope uses a mirror to focus light. A receiver is put at the focal point to pick up the signal. The dish must be pointed at the satellite to pick up the signals just like a telescope must be pointed at the Moon to see the Moon.
2007-07-21 05:05:36 · answer #1 · answered by campbelp2002 7 · 0⤊ 0⤋
I'm in th UK so can't be sure, Possibly they have turned up the power on the satellite so dish doesn't need to be so big, as for parts of the dish, theres the LNB which is at the end where the wire connects, the lnb arm the bit the lnb is attached to, reflector is the actual dish part and I think thats about it
2007-07-21 04:48:11 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The focus is better . The LNA or LNB have higher gain and a lower noise figure.
2007-07-21 04:54:52 · answer #3 · answered by JOHNNIE B 7 · 0⤊ 0⤋
Look up some of the specialist tv and satellite mags !!!!
2016-05-19 03:05:02 · answer #4 · answered by ? 3 · 0⤊ 0⤋