A multi-piece retractable radiotelephone antenna and associated communication method is employed to provide improved signal quality. The multi-piece antenna includes conductive windings, such as helical quadrafillar windings, disposed separately on two slidably cooperating substrate members. The antenna...http://www.google.fr/patents/US5907306?utm_source=gb-gplus-shareBrevet US5907306 - Retractable radiotelephone antennas and associated radiotelephone communication methods
Retractable radiotelephone antennas and associated radiotelephone ...
