Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Does AFN use RHCP or RHEP ?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Channel Hopper" data-source="post: 889363" data-attributes="member: 175144"><p><span style="font-size: 15px">Since most satellites do not have a ground footprint where the the two linear planes of transmission appear at 90 degrees to each other, the circular polarisations would logically follow. To depolarise them for entry into the throat of an LNB however is not within the bounds of a dielectric type, and you would almost certainly require a mechanical filtering system to achieve it.</span></p><p><span style="font-size: 15px"></span></p><p><span style="font-size: 15px"><strong>Elliptical polarization</strong></span></p><p><em>Elliptical polarization results when one of the two linear components in CP is greater amplitude than the other. The ratio of the two voltage amplitudes is called the axial ratio. When axial ratio is one, you have CP.</em></p><p><em></em></p><p> <em></em></p><p><em>One way to look at elliptical polarization is that <strong>the two components of circular polarization are not exactly 90 degrees apart</strong>.</em></p><p></p><p><em><a href="http://www.microwaves101.com/encyclopedia/polarization.cfm" target="_blank">http://www.microwaves101.com/encyclopedia/polarization.cfm</a></em></p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 889363, member: 175144"] [SIZE=4]Since most satellites do not have a ground footprint where the the two linear planes of transmission appear at 90 degrees to each other, the circular polarisations would logically follow. To depolarise them for entry into the throat of an LNB however is not within the bounds of a dielectric type, and you would almost certainly require a mechanical filtering system to achieve it.[B][/B] [B][/B] [B]Elliptical polarization[/B][/SIZE] [I]Elliptical polarization results when one of the two linear components in CP is greater amplitude than the other. The ratio of the two voltage amplitudes is called the axial ratio. When axial ratio is one, you have CP. One way to look at elliptical polarization is that [B]the two components of circular polarization are not exactly 90 degrees apart[/B].[/I] [I][url]http://www.microwaves101.com/encyclopedia/polarization.cfm[/url][/I] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Does AFN use RHCP or RHEP ?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top