Exclusive: Scalar ring and it's usage........
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06-03-2015, 08:32 AM
(This post was last modified: 06-03-2015 08:33 AM by SENTHIL KUMAR.)
Post: #1
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Scalar ring and it's usage........
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Scalar ring and it's usage.
The scalar ring assembly amplifies the signals which are arriving from the one specific satellite that is the most perfectly in line with a perpendicular beam to the center of an imaginary plane of the dish reflector. Signals from that satellite which strike the outer areas of the dish, where it might be less efficient for amplification, are reflected back to the dish by the scalar rings and refocused and concentrated better towards the throat of the waveguide of the LNBF or feedhorn. Otherwise weak signals will be amplified suffiiciently for the receiver to lock on to that signal and provide a more stable signal quality. signals coming from off the edges of the dish, I think that they also function to increase the efficiency of the outside portions of the dish for the desired signals. Signals hitting close to the middle of the dish (talking prime focus here) go into the throat of the feedhorn at a pretty direct angle, and don't have any problem, but signals coming from the edges of the dish are once again reflect to dish centre and back to feedhorn. Finally in satellite antennas, scalar rings are used to push the spread signal into the feed horn.
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The following 1 user Likes SENTHIL KUMAR's post: SatVijay |
07-03-2015, 08:57 AM
Post: #2
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Scalar ring and it's usage........
Senthil ... Good briefing pa..... It is useful to all and Pls post that link of satellite dictionary
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07-03-2015, 10:42 AM
Post: #3
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RE: Scalar ring and it's usage........
(06-03-2015 08:32 AM)SENTHIL KUMAR Wrote: <font color="red"><strong>Guests cannot see images and links in the messages. Please register to forum by clicking <a href="member.php?action=register">Register Here</a> to see images.</strong></font>OR Login to view.thanks dear senthil, there are two types of scalar rings, flat and conical, which of them used for offset dish and prime focus,and moreover how does the ridges/gap inner side of scalar ring is measured, is it (scalar ring size) proportionate to size of the dish or strength of signal we need to catch pls elaborate... if there is no ridges like shape of funal (i.s plain without circular ridges), will it bounce back and send it to feed horn throat ? |
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