Antenna device and portable radio communication device comprising such an antenna device

An antenna device for a portable radio communication device operable in at least a first and a second frequency band, the antenna device comprising:

• a first electrically conductive radiating element having a feeding portion connectable to a feed device of the radio communication device;
• a second electrically conductive radiating element having a grounding portion connectable to ground, said first and second radiating elements are generally planar and arranged at a predetermined distance above a ground plane;
• a controllable switch arranged between the first and second radiating elements for selectively interconnecting and disconnecting the radiating elements, the state of the switch being controlled by means of a control voltage input (VSwitch);
• a first filter arranged between the feeding portion and the control voltage input (VSwitch), wherein the first filter is arranged to block radio frequency signals;
• a high pass filter connected between said first and second radiating elements, which high pass filter allows RF signals to pass;
• a third radiating element together with a second control input (Vswitch2) connected to the third radiating element via a low pass filter, wherein the third radiating element is connected to the second radiating element by means of a second switch;
• and
• a second grounding portion arranged on the first radiating element which is connected to ground via a second high pass filter blocking DC signals, and
• a low pass filter arranged between the second radiating element and ground.

A portable radio communication device, comprising a generally planar printed circuit board and an antenna device connected to a feed device (RF) with electronic circuits provided for transmitting and/or receiving RF signals, and a ground device, wherein the antenna device comprises:

• a first electrically conductive radiating element having a feeding portion connectable to a feed device (RF) of the radio communication device;
• a second electrically conductive radiating element having a grounding portion connectable to ground;
• a controllable switch arranged between the first and second radiating elements for selectively interconnecting and disconnecting the radiating elements, a state of the switch being controlled by means of a control voltage input (VSwitch);
• a first filter arranged between the feeding portion and the control voltage input (VSwitch), wherein the first filter is arranged to block radio frequency signals;
• a high pass filter connected between said first and second radiating elements, which high pass filter provides an RF bridge between the first and second radiating elements and thereby allows RF signals to pass, so that the first and second radiating elements are operable as one single radiating element.