Integrated antenna for mobile telephones

Abstract

An Integrated Antenna for Mobile Telephones A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate (2) and a radiator (3) which is arranged at a distance from and substantially in parallel to the earth plate (2) and at one of its end zones is conductively connected to the earth plate), wherein at a first (lower) resonant frequency of the antenna arrangement (1) a voltage minimum occurs at the connection point of the radiator to the earth plate (2) and a first voltage maximum occurs in the region of the other end (free end) of the radiator, and at a further, higher resonant frequency, a voltage minimum and a second voltage maximum occur respectively at the foresaid ends of the radiator (3), and that the region of the free end (6) of the radiator is capacitively coupled to another point (7) of the radiator such that the further resonant frequency is reduced relative to three times the value of the first resonant frequency when the foresaid capacitive coupling is present. It is advantageous that the entire surface area of the radiator is used in two frequency ranges and that only one single connection point to the radiator is required for the feed line.

Dependencies are inferred from the claim text.