Patent ID: 7027004

Claim:
A broadband omnidirectional antenna comprising: an antenna element in the form of a monopole, the antenna element projecting from a base plate and arranged such that it is electrically conductively isolated from the base plate, the antenna element having at least a first antenna section which widens conically or at least partially conically away from the base plate at a foot point, the base plate having a recess in the area of the foot point, the antenna element comprising a first coupling element and a second coupling element, the first coupling element comprising a rod-like structure, the second coupling element comprising a tubular structure, whereby the first coupling element is inserted into the second coupling element, the first coupling element projecting from the base plate and being isolated from the base plate, the first coupling element being electrically connectable with a feed line, the second coupling element being electrically connected with the antenna element, said first and second coupling elements providing a series or capacitive inner conductor line coupling, the second coupling element being positioned within the antenna element first antenna section.