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design mobile flash sticker antenna? diode antenna LED? - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


guest
Post subject: design mobile flash sticker antenna? diode antenna LED? Posted: Wed Jul 20, 2005 9:09 am
I want to know how the flash sticker antenna are made? The flash antenna which you can buy and stick at the outside (cover) of your mobile and which flash when you have got a mobile call (size about 2cmx1cm).It looks that the antenna is meander like and serie connected with 2 diodes and then in serie with LED:s, in a closed loop on one layer.

How is the antenna designed? Is it an monopole or what and which frequency is it designed for 1800MHz etc? How to make the antenna so small and broadband allowing an LED or something to be connected and feeded? How is the antenna matched?

What output voltage for a circuit like this could you expect (single diode)?

I would appreciate as much information as possible about the antenna design etc for being able to make a similar circuit.



Posted  11/12/2012
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