[SI-LIST] Re: WiFi / GPS Antenna Placement
- From: O Nithin Bharadwaj <nithin-bharadwaj@xxxxxxx>
- To: "ajaypal.singh@xxxxxxxxxxxx" <ajaypal.singh@xxxxxxxxxxxx>, SI LIST <si-list@xxxxxxxxxxxxx>
- Date: Mon, 22 Apr 2013 11:38:06 +0000
Hi Ajay,
Best thing would be to quantify with simulations. What is level of isolation
are you looking between the radio? Generally we expect it to be around -18 to
20 dB.
Also you should pay attention to radiation pattern of the antennae based on
intended area coverage.
GPS should be given higher priority because the signal strength will be very
low given to the atmospheric attenuation of satellite signals.
And regarding your question "... placement, we are thinking placing GPS
antenna on the bottom layer. Would
that help in improving the performance of antennas and avoiding
interference?"
make sure that no obstruction of components are present above the bottom layer,
especially metallic parts.
Warm regards,
Nithin
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Ajaypal Singh Sandhu
Sent: Monday, April 22, 2013 4:12 PM
To: SI LIST
Subject: [SI-LIST] WiFi / GPS Antenna Placement
Hi,
Our design contains two chip antennas for WiFi (2.4GHz, Wurth Electronics
7488930245) and GPS (Taiyo Yuden AH 316M157501). Due to space constraints, both
antenna are placed very close to each other.The center to center distance
between two antenna is around 14.5mm. I seek answer to the
following:
- What would be the affect of the such close placement of the antennas
on their performance? Is it permissible? Pls. clarify.
- We cannot increase the size of the PCB. One of the alternative
placement, we are thinking placing GPS antenna on the bottom layer. Would
that help in improving the performance of antennas and avoiding
interference?
Thanks in advance.
Regards,
Ajaypal Singh
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