I doubt they will want to make that kind of change. The antenna appears to be printed on the circuit board. Lots of work and cost to change that. It probably won’t be legal either unless you still had to take the device apart to change it. Can’t be “user upgradable” I bet.
I had some really crude ideas. Here are a couple. I also thought we might be able to create some kind of wave guide. None of these would be legal due to ERP per se. I don’t think the yagi design would work with straight elements. The reflector in particular but you should get the general idea.
EDIT: I am assuming we are the units ground in standard operation. Similar to a handheld transceiver of most other types. Someone correct me if they know differently.
