I recently came across a VHF locator tag used to find animals in the field. It operates on the 160MHz band. According to the user the locator range is some km line of sight (using Yagi antenna) and some hundred meters "in the jungle".
I disassembled the device and honestly was expecting a much larger antenna. Wavelength at 160MHz is about 1.8m, lambda/2 would be 90cm (dipole) and lambda/4 would be 45cm (monopole). But take a look at the antenna I found:
If pulled straight, the length of the handle is 55mm, the short wire 13mm and the long wire 34mm.
Can someone explain me how this antenna works with the length given? My understanding of an antenna so far is that only at a certain length proper RF transmission will happen.