TECHGuru

An antenna is an electrical component, which acts as the coupling between a guided electrical signal and an unguided medium, typically between a coaxial cable and free space. The antenna transforms electrical signals into electromagnetic waves or radio waves. An antenna is basically an array of conductor (elements), electrically connected to the receiver or transmitter. The terminal antenna is external; either a retractable rod, or to make it smaller, folded together into a coil or helix. The terminal antenna design has witnessed a remarkable revolution in the past few years. Terminal antennas market are exclusively single ended, i.e. the reference terminal is the ground plane or chassis. Therefore, terminal antennas should in principle be compatible with coaxial cables, where the coaxial shield is soldered to the chassis metal and the center conductor is attached to the feed terminal. Conventionally, terminal antennas are designed based on the simple often unrealistic criteria, inclu...