Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
That looks like a printed bottom-loaded antenna. I'm no expert, but I think a full-length 1/2-wave vertical dipole antenna might improve things if you want an omni-directional response, or a Yagi array if you want a directional response.
This is an arduino where I did something like this, this is a wifi device, so I was fortunate in that there is plenty of antenna's around for wifi frequencies, I just pinched one off an old router that already had a connector on the end.
I pulled the ant off the board and soldered on a socket, range is now 3x.
If your device is wifi you can do this, or you could build your own ant, but it can get tricky.