Patent ID: 7388555

Claim:
An adjustable-frequency two-element bowtie antenna, comprising: a support member; first and second hollow element support arms mounted to the support member and formed from a non-conductive material, the first and second element support arms each including first and second opposing segments extending in opposite directions from the support member, the first and second segments of each element support arm each including a first section extending outwardly from the support member, a curved transition section, and a second section extending in a direction towards and joining the second section of the other element support arm, the spacing between the first section of each segment of each element support arm increasing as a function of the distance from the support member; a length-adjustable conductive member disposed in each hollow element support arm; a first length adjuster coupled to the conductive members in the first and second segments of the first element support arm to configure a first antenna element; a second length adjuster is coupled to the conductive members in the first and second segments of the second element support arm to configure a second antenna element; and a coupling configured to receive a transmission-line electrically coupled to a pair of the conductive members comprising a driven element.