Antenna for flat radio device

An internal antenna for a flat radio device having a signal ground,the antenna comprising:

• a monopole-type base element with a feed conductor, wherein said base element has a first branch and a second branch, between which branches being an electromagnetic coupling to set the ratio of the fundamental resonating frequency and its nearest harmonic of the base element such that the fundamental resonating frequency falls into frequency range of a first radio system and said nearest harmonic falls into frequency range of a second radio system;
• a parasitic element functioning as an auxiliary radiator;
• and
• a single matching element connected between the parasitic element and the signal ground to optimize antenna matching.

An internal antenna for a flat radio device having a signal ground, the antenna comprising:

• a monopole-type base element with a feed conductor;
• a parasitic element functioning as an auxiliary radiator;
• and
• a single matching element connected between the parasitic element and the signal ground to optimize antenna matching, wiherein the matching element is a wound conductive wire.

A radio device having a signal ground and an internal antenna, comprising:

• a monopole-type base element with a feed conductor;
• a parasitic element functioning as auxiliary radiator;
• and
• a single inductive matching element connected between the parasitic element and the radio device signal ground to optimize antenna matching.

A radio device having a signal ground and an internal antenna, comprising:

• a monopole-type base element with a feed conductor;
• a parasitic element functioning as an auxiliary radiator;
• a single matching element connected between the parasitic element and the radio device signal ground to optimize antenna matching;
• and
• the radio device having a first part and a second part such that these parts can be turned on a hinge one upon another, said antenna being located within the first part.

An internal antenna for a flat radio device having a signal ground, the antenna comprising:

• a monopole-type base element including a feed conductor;
• a parasitic element functioning as an auxiliary radiator;
• a single matching element connected between the parasitic element and the signal ground to optimize antenna matching;
• and
• the flat radio device includes a circuit board;
• wherein the base element and the parasitic element are substantially on top of one another as viewed along the direction of the normal of said circuit board.