We live in a village outside Bratislava in Central Europe. This is prime agricultural land and there are infinite numbers of moles in the fields around us, so some will eventually stray into the garden. Once they are enjoying the good life in the village, it can be hard to convince them to relocate. I tried a few things and can now present here the 100 Horse Power Mole Eliminator : It costs nothing and it works. If you have an old lawn mower, garden tractor, or moped, that may be easier to move around and it produces more global warming badness, but a car starts with the press of a button and a couple of hose pipes clicked together, to go from the driveway to the far end of the yard, works well enough. The trick is to get all water out of the pipes before you start - lift it shoulder height and walk along the pipe a couple times. The exhaust of a modern car is not very hot and will not melt plastic, but I used a short piece of metal pipe since I really don't want goop stuck to
The 1700 to 2400 MHz band (M1 to M6) is a good band for the secondary control channel of air and ground robotic vehicles. Little radios made by Doodle Labs in Singapore are popular and this is an antenna solution specifically aimed at the Meshrider radios ( https://doodlelabs.com/products/mesh-rider-radios/nano/ ). These antennas will certainly also work well with Microhard in Calgary Canada Nano 2.4 GHz ( https://www.microhardcorp.com/n2420.php ) radios. I employed Ye Olde Fashioned technique of carving an antenna out of double sided board with a ruler and a scalpel, using copper tape for little optimization experiments and fixing the mistakes. Once one has the hang of it, it is possible to carve an antenna by hand in a day, vs waiting two weeks for a PCB factory. Etching it is good, if you have the chemicals and safety paraphernalia on hand and know what you are doing. With these 6 to 8 dBi antennas, you do not need a precision tracking system. Simply put them on a tripod a