FreeLists / si-list / [SI-LIST] Re: Patch antenna

[Geoff Stokes <gstokes@xxxxxxxxx>]

Hello Neil

Having looked briefly at the inverted-F antenna a while ago, I found that
the bandwidth when matched increases with the conductor height above the
ground plane, also affected by overall size, assuming you are working at
less than around lambda/2, and the height is smaller still.  So for broader
bandwidth you need a larger antenna.  I suspect some use more complicated
shapes to provide more gradual impedance matching.

> -----Original Message-----
> From: neilmallik [mailto:neilmallik@xxxxxxxxxxx]
> Sent: 05 January 2004 19:48
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Patch antenna
> 
> 
> Hi all,
> 
> I have just designed a broadband patch antenna, which should be 
> resonant in the 5.1 - 5.8GHz range (IEEE802.11a). This was designed 
> in ADS.
> 
> I have fed the patch using impedance matching (lambda/4), and yet I 
> am not achieving a broadband bandwidth (expected). I have now lost 
> faith in ADS and in the design I am using.
> 
> Can anyone suggest any other patch designs which have broadband 
> characteristics in the in the IEEE802.11a region?
> 
> Any quick response is greatly appreciated.
> 
> Thank you.
> 
> Neil
> 
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