Patent ID: 6965353

Claim:
A multiple frequency band antenna comprising: a dipole antenna arranged on a straight line; and at least two extension elements extending outward of respective ones of opposing outer ends of said dipole antenna along said straight line; wherein: the length of said dipole antenna is determined to enable the multiple frequency band antenna to receive radio waves in a first frequency band, and the sum of the lengths of said dipole antenna and said two extension elements is determined to enable the multiple frequency band antenna to receive radio waves in a second frequency band lower than said first frequency band; said multiple frequency band antenna further comprises: first and second switch devices connected between respective ones of said two extension elements and associated ones of said outer ends of said dipole antennas; and control means operating, when a radio wave in said first frequency band is to be received, to selectively place said first and second switch devices in a first state in which said first and second switch devices are opened, a second state in which said first switch device is closed and said second switch device is opened, and a third state in which said first switch is opened and said second switch device is closed.