ANTENNAS, i.e. RADIO AERIALS

**Definition:** This place covers:

an electrical conductor or array of conductors that radiates signal energy (transmitting) or collects signal energy (receiving); it's a transducer between a guided electromagnetic wave e.g. in a coaxial cable, waveguide, stripline and an electromagnetic wave in free space; the reciprocity relation is valid; the antenna is a passive linear reciprocal device That part of a transmitting or receiving system that is designed to radiate or to receive electromagnetic waves.

**Limiting references (this place does not cover):** - Radiators or antennas for microwave heating -> H05B6/72