What supplier? You need just a good drawing on the copper...and a VNA
to caracterise your "drawing".

Vasile

On 12/30/06, Zik Saleeba <zik@zikzak.net> wrote:
> 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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> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
>
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