Thanks everyone for your suggestions. Looks like I'll be finding an
alternate supplier.

Cheers,
Zik

On 12/30/06, Russell McMahon <apptech@paradise.net.nz> wrote:
> > Does anyone have any experience with chip antennas? I'm designing a
> > handheld GPS as a commercial product and am keen on chip antennas
> > given their small size. I've been looking at these:
>
> No, but:
>
>
> There's a lot on Gargoyle.
> It seems that enough people make them that having someone who makes
> them supply you may be worthwhile.
> Also, eg the Freescale paper below suggest that alternatives MAY not
> be inferior
> in performance or cost.
>
> ______________________
>
> Here, surprisingly, is a free to view letter re a new (in 2002)
> meander line design
>
>         http://ma.icu.ac.kr/papers/2002_MOTL_meander.pdf
>
> ABSTRACT: This Letter proposes a novel antenna that has a small
> size and high gain features. The conventional chip antennas are made
> of
> very high dielectric materials that result in small size but
> inherently low
> radiation gain. Instead of using the dielectric materials, the
> proposed
> antenna has a small size while retaining high gain. The bandwidth and
> gain of this model, with antenna size 15 10 6 mm, have 9.0% (at
> 2.44 GHz, S11  10 dB) and 2.73 dBi, respectively. (c) 2002 Wiley
> Periodicals, Inc. Microwave Opt Technol Lett 34: 149-151, 2002;
> Published online in Wiley InterScience (www.interscience.wiley.com).
> DOI 10.1002/mop.10399
>
> _______________________________________________
>
> Here's an interesting Freescale application note (20 pages) with a
> slightly Zigbee focus.
>
> While it only provides a couple of actual application examples it
> briefly touches on a very large range of alternative antenna formats
> and their attributes. At the end is a partially described loop loop
> antenna which they say has superior gain to an equivalent chip
> antenna.
>
> Compact Integrated Antennas
> Designs and Applications for the MC1319x, MC1320x, and MC1321x
>
>         http://www.freescale.com/files/rf_if/doc/app_note/AN2731.pdf
>
> ___________________
>
> Kim YD, Kim HY, Lee HM (2005) Dual-band LTCC chip antenna design using
> stacked meander patch for mobile handsets. Microw. Opt. Technol. Lett.
> 45(4): 271-273
>
> ____________________
>
>
> This may be generally useful
>     GPS / GNSS biblioography 1998 - 2005
>     Superb resopirce for researchers and developers.
>     No data per se - but what people are doing
>     Here's the 2005 page
>            http://www.ngs.noaa.gov/CORS/GPS_Bibliography/GPS_bibliography_2005.html
>
> _________________________
>
> With Taiwanese companies like this making them (with a name brand name
> on this picture) it's arguably unlikely to be worthwhile buolding uour
> own
>
>         http://www.coxoc.com.tw/product/detail.asp?myid=396&title_name=Antennas
>
>
>         Home
> http://www.coxoc.com.tw/product/main.asp?titlename=Products
>
>
>
>         Russell::
>
>
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