Mobile aerials

mobile aerials elektor june 1982 — 6-27 One of the biggest problems faced by breakers is which aerial system to choose, so that their transceiver will operate efficiently. This is a universal problem encountered by the whole spectrum of radio communication system users (HAMs, etc.). It is a fact of life that an aerial is probably the most vital part of any system. No matter what the quality or power rating, a transceiver will be made impotent by a badly designed or maladjusted aerial. Further restrictions are imposed on the designers when an aerial has to be mounted upon a vehicle. Unfortunately, because of practical and safety consider- ations the normal highly efficient static mobile coil to "make it long again". Three different types of loaded coil mobile antennas are possible. Figure la shows the BLC (Base Loaded Coil) and figure lb the CLC (Centre Loaded Coil) type. Both these designs are compact and reasonably short. Even though the rod is approximately 1 metre in length, ...