Antenna arrangement for mobile radiotelephones

authored by

Achim Bahr, Dirk Manteuffel, Jose Marie Baro

Abstract

A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate and a radiator that is disposed at a distance essentially parallel to the earth plate and is conductively connected to the latter by one of its end regions, wherein, at a first (lower) resonant frequency of the antenna arrangement, a voltage minimum is present at the connection of the radiator to the earth plate and in the region of the other end (unsupported end) of the radiator a first voltage maximum is present, is characterized in that there is disposed between the radiator (3) and the earth plate (2) near the unsupported end of the radiator (3) a settable switch element (11) that is designed in such a way that it is capable of making a connection having a low impedance, and in that the point at which the switch element is connected to the radiator (3) is disposed in such a way that, with the switch element (11) set to conduct, the radiator (3) has a desired second resonant frequency that is higher than the first resonant frequency. It is advantageous that the entire or almost the entire radiator radiates in the two frequency ranges.

Organisation(s)

Institute of Microwave and Wireless Systems

External Organisation(s)

Alcatel-Lucent S.A.

Type

Patent

Publication date

27.12.2001

Publication status

Published

 

Details in the research portal "Research@Leibniz University"