thanks so much for all this great information! I just talked to a colleague from engineering and we will give this design a try!
We were also wondering if there is a way to create variation in the signal frequency so that we can identify individuals. For example... (read more)
I work for a UK company that makes (amongst other things) tracking and surveillance technology. Usually we sell this technology to law enforcement and other agencies that have a use for this type of thing.
We want to do something philanthropic and thought that our equipment and... (read more)
Hi, you can contact Telenax, they buil GPS-IRIDIUM-BLUETOOTH+VHF units, these are simple to configure it and to use them also. you don't need to do field work, only to retrieve the unit when you use drop off or to recapture the animal using VHF.
... (read more)
Two suggestions coming through over twitter:
A good start is to reduce your reciever's gain as far as possible.
Hopefully you can snuff out the antenna's rear lobe that way. Headphones really help there too.... (read more)
Here is another TEG that looks promising.
Texas Instruments bq25570 Ultra Low Power
Harvester Power Management IC