So it is no surprise that hams like [jmharvey] will build an antenna ... build is on a universal circuit board, [jmharvey] used Eagle to lay out the circuit as though it were a PCB.
We have all seen Printed Circuit Board (PCB) antennas: those squiggly bits of traces on PCBs connected often to a Bluetooth, WiFi or other wireless communication chip. On modules like for the ...