DIVERSITY ANTENNA FOR COMMUNICATIONS EQUIPMENT FOR MOBILE TELEPHONE UNIT

摘要

PROBLEM TO BE SOLVED: To provide a diversity antenna for communications equipment for moving a mobile telephone unit, capable of performing satisfactory receiving, regardless of the polarization state. SOLUTION: Since this diversity antenna for communications equipment for moving object is provided with two helical antennas 10 and 11, arranged mutually vertically and a high frequency changeover switch 12 for alternatively switching two helical antennas 10 and 11, satisfactory receiving is enabled regardless of the polarization state.