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GSM 1900 Patch Antenna help - RF Cafe Forums
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| Marc_in_NoCal
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Post subject: GSM 1900 Patch Antenna help
Posted: Tue Mar 18, 2008 6:50 pm
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Joined: Tue Mar 18, 2008
6:39 pm
Posts: 2 |
Hi, I am looking to buy this Patch Antenna
for my AT&T wireless cellphone:
http://www.hyperlinktech.com/web/1.9ghz ... a_8dbi.php
but, I know that ATT goes down to 1850,
but this Antenna is spec'ed to 1880. does anyone
know this Antenna is OK for ATT's high band GSM?
Or if not, does anyone has a suggestion
on similar Patch Antennas that would work for ATT's
high Band GSM service? thanks in advance
for any information, Marc
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RFBites |
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Post subject:
Posted: Sun Mar 23, 2008 6:30 pm
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Joined: Sun Mar 23, 2008
5:59 pm
Posts: 2
Location: Lafayette, CO
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Hi Marc,
You might want to request the VSWR
or Return Loss plots for this antenna from 1850
- 1990MHz from HyperLink. My guess is that the return
loss starts to get bad at the lower frequency, which
translates into a poor match for your power amplifier.
At it's worst, a poor match could cause your power
amplifier to fail due to a high VSWR. Other than
that, you will start to loose gain, and have a power
mismatch between your uplink and downlink.
Just a hunch, but if Hyperlink had the ability
to spec this antenna down to 1850, I'm sure they
would have done it, or they are really missing a
good market.
You may want to keep shopping
around.
Best Regards,
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nubbage |
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Post subject:
Posted: Tue Mar 25, 2008 6:06 am
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| General |
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Joined: Fri Feb 17, 2006
12:07 pm
Posts: 218
Location: London UK
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A simple patch antenna only has a bandwidth (VSWR <=
2:1) of 2%.
There are ways to broaden this by
overlaying patches that are isolated electrically,
and using resonant apertures etc, but I do not believe
Hyperlink equipment incorporates these ideas (yet)
as standard.
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Marc_in_NoCal |
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Post subject: thank you very much for these information. [nt]
Posted: Wed Mar 26, 2008 3:29 pm
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Joined: Tue Mar 18, 2008
6:39 pm
Posts: 2 |
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Posted 11/12/2012 |
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