QUESTION

asked ago by
Antennas choice and PCB requirements
HI,

We are developing a 2.5G ski tracker, what antenna and GPS would you recommend for a PCB size of 50 mm x 40 mm?

I see from you online selection that the efficiency is reduced with such a small PCB?

Please log in or register to answer this question.

1 Answer

answered ago by
Hi Pete,

Sinica or Agosti will work well on a PCB of these dimensions. Best performance would be Sinica placed in the centre of the long edge.
Many Thanks

Steve
commented ago by
Thanks Steve,

Your specifications document shows efficiency below a 60mm long PCB is 45%, is 50mm PCB much worse for the Sinica?

Also what cellular antenna would you propose and it’s best position relative to the Sinica?
commented ago by

Hi Pete,

I would expect the efficiency to be around 35% on this size PCB. However, we've found that when connected to our GNSS module this efficiency would translate to a good CN level. 

For the cellular antenna, it depends on which bands you require and whether you require certification. Typically, Pharaoh would be the best fit for 4G on small PCBs. Please see suggested layout below. 

Many Thanks

Steve

commented ago by
Thanks Steve,

We are using 2.5G edge on the 900 band. Also a quectel BG95 chip. what would work best? Also how far away from batteries should we look to keep both antennas?
commented ago by
Hi Pete,

Pharaoh would be the best antenna here. Typically we would recommend a 10mm gap between antenna and battery/other reflective/conductive parts, however it may be possible less clearance will still work - in order to judge this we would need to see PCB layout and 3D drawings. We offer a free design review service and our FAEs can help you integrate our products to get the best possible performance.

Many Thanks

Steve
commented ago by
Thanks Steve,

Your SR4L049 - L is it any good on such a small PCB?

Meet the moderators

Steve Bradburn

Senior Antenna Engineer at Antenova With over 25 years’ experience in manufacturing, test and design, Steve has a wealth of RF and measurement knowledge across many industry sectors.

Yu Kai Yeung

Antenna Engineer at Antenova Yu Kai is an antenna expert with over 10 years of experience in the design and testing of antennas. He has experience helping customers with certification testing, combined with his knowledge of RF measurement procedures.

download-guide-image

Antennas: The Comparison Guide

Find the perfect antenna for your project

Download
...