How does a ceiling antenna works?

kayaoo said:

hi all,
The ceiling antennas used in communicaion usually have a very wide E plane and a omni directional H plane which are all much wider than a simple P atch antenna. How are they realised?

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Element7k said:

Hi kayaoo,
can you give an example of the ceiling antenna so we can all investigate?

kayaoo said:

oh,That's what i want too. I search on the google but can not find a useful paper. Some of the ceiling antennas are stub monopoles. but Some of them have a very small height and can not be a simple monopole.here is a sample.
http://www.cushcraft.com/support/pdf/S2402PS12MMX.pdf

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mogwai said:

Another very peculiar antenna design is this one:

Code:

http://www.hubersuhner.com/sp-rf-ant-prod-db-spa_0859_360_4_10_v_en.pdf

Huber-Suhner Sencity Art Antenna

I have seen this model last March in Cebit-Hannover and the engineers at H&S told me the concept of the design is kept as an industrial secret

mogwai.

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Element7k said:

Hi,

this antenna was featured in Microwave Journal sometime ago (size quite big though) (I think sometime in summer 2003) and if I remember, it did give a quick explanation of how the antenna works. Basically, it is derived from a flat plate to obtain broadband response. It has something to do with the size of the gnd plane and the height and flare of the plate away from gnd. Also an article about a similar type but not bended antenna can be found if you search for author Max Ammann in the IEEE website (I think he wrote an article in the antenna and propagation magazine.

Cheers,
Element7k

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