Nokia Corporation

Filtronic Lk Oy

Pertti Vainikainen

Jani Ollikainen

Clemens Icheln

Juha Villanen

Sinasi Ozden

Claus H Jorgensen

Bjarne K Nielsen

Jari Petteri Holopainen

Outi Kivekäs

Jaakko Juntunen

Outi Kivek&auml;s

Bjame K Nielsen

An antenna arrangement including a partitioned ground plane including at least a first part and a second part that are interconnected by a component having a predetermined impedance; and an inductive coupling element positioned adjacent the component.

Antenna arrangement

An antenna module has a substrate, first and second coupling elements, and first and second resonant circuits disposed on the substrate. The first and second coupling elements are mounted to the substrate and particularly adapted to couple respective first and second frequency bands to a ground plane through respective first and second ports. The first resonant circuit has a plurality of components having electrical values selected so as to function as a band-pass filter within the first frequency band and to present a high impedance at least in the second frequency band. The second resonant circuit is coupled to the second port and has a plurality of components that have electrical values selected so as to function as a band-pass filter within the second frequency band and to present a high impedance at least in the first frequency band.

Quad-band coupling element antenna structure

There is provided a method of operating, a diversity antenna system and arrangement for a mobile station such as mobile phone having a general ground element, the diversity antenna arrangement including at least a pair of antenna elements. Each antenna element comprises a generally L-shaped radiating element, and a conductive leg portion being operatively coupled to the generally L-shaped radiating element.

Diversity antenna arrangement

The invention relates to a dielectric antenna, particularly suited to portable radio devices. The feed conductor () of the antenna is shaped so that it at the same time in itself serves as a radiator in the same frequency range as the dielectric resonator () of the antenna. The resonance frequencies of the feed conductor and the dielectric resonator are advantageously arranged to be so near to each other that there is formed a united operation band. The feed conductor is advantageously located on a surface () of the dielectric element. The structure may also include parasitic conductors. For the antenna according to the invention, there is obtained a larger bandwidth than for corresponding antennas of the prior art. Moreover, the air gaps between the feed conductor and the dielectric element are avoided, as well as resulting changes in the electric properties.

Dielectric antenna

A radio antenna comprising a tuning component, such as a transmission line, coupled to the radiating element for providing a frequency shift from the resonant frequency, and an adjustment mechanism for adjusting the frequency shift by effectively changing the length of the transmission line. The adjustment mechanism comprises one or more extension lines, and a switching mechanism, which can be closed to couple one or more of the extension lines to the transmission line. The tuning component can also be one or more lumped reactive elements.

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Helsinki, Finland

Pertti Vainikainen