Hello Jack,
Did you already check if your Power Amplifier is well grounded ?
In case you have an inductance between both, I can imagine ground noice to
occur.
Best Regards,
Cor Coolen
HW - MR
Philips Medical Systems
To:
<si-list@xxxxxxxxxxxxx>
cc: (bcc: Cor
Coolen/BST/MS/PHILIPS)
Subject: [SI-LIST] Where
and how the Ground Noise Come from?
<wenjie-jack.yu@xxxxxxxx Classification:
m>
Sent by:
si-list-bounce@freelists
.org
02/03/03 08:22 AM
Please respond to
wenjie-jack.yu
Dear All,
In the Mobile Phone, we have large GND noise (about 500mV) in the GSM =
900Mhz Power level 5 (about 2Watt power from antenna). And the noise =
happened in the GSM burst.=20
But this noise decrease with the Power Amplifier Level decrease.
So I want to ask where and how this noise come? its caused by Antenna =
Mismatch? Or the Shield have some leakage?=20
And how to decrease this noise?
> Best Regards,
> Jack
>=20
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