On Tue, 12 Aug 2003 00:02:09 GMT, Zknb wrote:
> On Mon, 11 Aug 2003 05:22:03 -0000, Jimchip
><> wrote:
>
>>On Sun, 10 Aug 2003 22:39:19 -0500, Richard wrote:
>>[snip]
>>
>>> How can it work if it's not connected to the antenna or even the phone?
>>
>>Oh St00pid, you don't know what you're talking about.
>>
>>[snip]
>>--
>>Think 'inductive loop'.
>
> Think again...
I don't need to think again...you're including my sig, which was an
offhand comment on St00pid's "How can it work if it's not connected to
the antenna", not necessarily the original question. I could have said
"Think WiFi" and it would have suited *my* purposes.
Perhaps you want to give your theory to the original poster.
>
> But lets take a little theory for a ride...
>
> Your cell phone antenna is a vertically polarized omni-directional
> antenna, the most simple antenna design.
>
> Complex antenna designs often have parasitic elements. One reflector
> and any number of directors not physically connected to the driven
> element.
>
> These parasitic elements improve gain because they are sized and
> placed at PRECISE multiples of the antenna center frequency.
You're describing a Yagi.
> How precise can you put that sticker on the back of your phone...
>
> Another thing, when you add elements to an antenna you also change the
> receiving (and transmitting) pattern. You get high gain at the front
> but very reduced gain (less gain than with no elements) at the rear.
>
> You no longer have an omni-directional antenna.
>
> For a cell phone this would be a very bad thing unless you are always
> standing in the same spot and pointing the same direction.
I don't have a cell phone so the 'you' is misapplied.
--
"I give up, you don't want to see that there is a difference between
being in something and being in something that is attached to, a part
of, ruled by and/or owned by something that is in a different location
to where you are."
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