Patent ID: 6839033
Filing Date: 2005-01-04
Classification: H01Q

Abstract:
1. A multi-frequency antenna comprising: a first antenna for mobile wireless equipment comprising a whip antenna section that can be freely extended from and accommodated into a holder having a flange and capable of operating in a first frequency band in an extended condition; and an antenna top section fixed through an insulating joint at the tip of this whip antenna section and comprising a first coil element capable of operating in said first frequency band in a condition projecting from said holder when said whip antenna section is accommodated; and a second antenna for mobile wireless equipment comprising a ring-shaped cover having a through-hole formed substantially in the center thereof and a step formed in this through-hole such that the diameter below this step becomes smaller; and a second coil element capable of operating in a second frequency band; characterized in that said holder is fixed to the casing by inserting the same within said through-hole that is formed in said cover in said second antenna for mobile wireless equipment, and said first antenna for mobile wireless equipment and said second antenna for mobile wireless equipment are thereby both fixed to said casing on engagement of said flange of said holder with said step within said through-hole; and characterized in that the shape of said antenna top section is determined such that said first coil element and said second coil element are separated by at least a prescribed disfrance when said whip antenna section is accommodated.