Ok but I would think that once you have found one (see the links) and you have tested the RavPower
battery, you know what to supply. Frankly I don't see the use case for a battery that alternately can be
used and be charged, in an application like this.
Good point! Although if we would know exactly what to develop and sell months ago we probably could estimate winner lottery numbers too Also there are other constrains in the background like component sourcing, price, lead time, which makes decision matrix quite complex.
For EMI on the LNA, it would probably help a lot when you properly shield it. I am going to put the
LNA in a tinplate box when I have the parts for my outdoor antenna stup complete. That, and the
5m cable between antenna+LNA and the other parts will probably kill any EMI problems.
No! The un-shielded LNA picks up 5% noise the antenna from its nearfield picking up 95% noise as it's also in the proximity of the digital components. Although we using a narrow band pass SAW filter, it's really hard to filter out the in-band noise like the spurious of the ARM CPU VCO etc.
Again, it's called development cycles / iterations what might not spectacular from externally but we non stop making new PCB versions, testing them and improving them to provide you guys better and better devices.