Talk:Reflector (antenna)

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hello

i really appriciate the work being done this is really helpful in increasing knowledge..

just wanted to ask in REFLCTOR ANTENNA page...

why do reflector dont absorbs rays incident on it???

is reflector a conductor? if yes conductors are free of EM waves..

please update the information accordingly. by the use of reflector antenna there may be the powerloss occured. if the powerloss of the signals then the strength of it will decrease.then how will we get a noiseless&clear signal at the output.

thank you.

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Reply: [08/10/2012] There are many ways of looking at how reflector antenna reflects and radiates through its created aperture. The easiest way to understand it is through using Physical Optics (PO). Firstly yes the surface of the reflector is indeed conductive. Let's say in this case it is a perfect conductor with zero scattering and zero current density on the shadow side of the reflector. The main reflector is then feed EM wave from another antenna or aperture source. These EM waves then creates a current on the reflector. If these currents are then integrated over the surface of the reflector one ends up with a vector potential A. If this vector potential is then differentiated one will find the far field radiation pattern of the antenna.

There is indeed powerless but the beauty of the reflector system is that it radiates/receives (They are reciprocal just like all antennas) these waves in a parallel bundle and not isotropicly, thus providing very very good signal to noise ratios. Which is precisely why reflectors are used when dealing with very small signals with high possibility of noise like astronomy.

Regards — Preceding unsigned comment added by 196.210.147.75 (talk) 17:30, 8 October 2012 (UTC)

Antenna efficiency

The sentence on this in the article is at present meaningless - can it be improved in some way? — Preceding unsigned comment added by Historikeren (talk • contribs) 11:41, 25 October 2012 (UTC)

I agree. I'm also not sure if/how it specifically applies to a reflector.67.167.106.3 (talk) 17:25, 22 April 2013 (UTC)

Merge this page into

Do we need this page? There are already pages on Passive radiators, Parabolic reflectors, Parasitic elements, Reflectors, and all the other concepts referred to here. I suggest this page be merged into these others. --Chetvorno^TALK 16:45, 29 November 2010 (UTC)

Yes! Keep them separate. Parabolic reflector is about parabolae, largely at light wavelengths. Reflector is a disambig. Passive radiators and parasitic elements are sufficiently distinct and technically more complex that they'd breach WP:UNDUE to merge them in here. Andy Dingley (talk) 02:04, 3 December 2010 (UTC)

I'm not suggesting merging those pages here, I'm suggesting merging this page into the others. There are no WP:UNDUE issues. Also, the few forms of antenna reflectors mentioned in the article do not come anywhere near describing the variety of reflecting elements and surfaces used in modern antennas. To do so would be to duplicate a great deal of content already present in other articles. This topic simply does not merit a separate article. --Chetvorno^TALK 23:15, 3 March 2012 (UTC)