[SI-LIST] R: WiFi / GPS Antenna Placement

From: "gianguida@xxxxxxxx" <gianguida@xxxxxxxx>
To: <ajaypal.singh@xxxxxxxxxxxx>, SI LIST <si-list@xxxxxxxxxxxxx>
Date: Mon, 22 Apr 2013 15:29:52 +0200 (CEST)
Hi Ajaypal,
this is a little bit different from a classical signal integrity problems
Whenever you place antennas on a structure you should expect effects like:
1. pattern distortion
2. inter-antenna copling
3. near field effects

All these effect can be modeled using a 3D simulator or 2.5 D isf the structure 
is planar, personally I work as senior AE for Antenna Design Framework that is 
an em simulator used
by industries in space application and I deal daily mainly with antennas placed 
on large platform oor with small antennas placed in close proximity

From the description of your problem I am sure that you will be able to model 
it with a standard em simulator.

Hope this helps
Giancarlo

P.S if you need more information on antenna coupling or pattern distortion you 
can contact me offline




----Messaggio originale----
Da: ajaypal.singh@xxxxxxxxxxxx
Data: 22-apr-2013 12.41
A: "SI LIST"<si-list@xxxxxxxxxxxxx>
Ogg: [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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[SI-LIST] R: WiFi / GPS Antenna Placement

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