- Antenna geometry (length) chosen such that the incoming RF signal frequency is a resonant frequency i.e. a strong signal is picked up
Linear polarization
- Most basic antenna design
- Examples: monopole, sleeved dipole, Yagi
Circular polarization
- Less angular dependency
- More receiver gain with more coils
- TX and RX antenna need to have the same polarization (left: LHCP, or right: RHCP)