Abstract: An antenna device for radio communications in a wearable device comprises a ground plate having an arc shape, a first antenna plate extending essentially parallel to the ground plate and connected thereto at a first end portion of the ground plate, the first antenna plate having a first feed terminal, and a second antenna plate extending essentially parallel to a the ground plate and connected thereto at a second end portion of the ground plate opposite to the first end portion of the ground plate, the second antenna plate having a second feed terminal. A gap is provided between the first antenna plate and the second antenna plate.

Abstract: An antenna device for radio communications in a wearable device comprises a ground plate having an arc shape, a first antenna plate extending essentially parallel to the ground plate and connected thereto at a first end portion of the ground plate, the first antenna plate having a first feed terminal, and a second antenna plate extending essentially parallel to a the ground plate and connected thereto at a second end portion of the ground plate opposite to the first end portion of the ground plate, the second antenna plate having a second feed terminal. A gap is provided between the first antenna plate and the second antenna plate.

Abstract: Exemplary embodiments are disclosed of switching arrangements for antenna devices. Exemplary embodiments are also disclosed of antenna arrangements and portable radio communication devices including such switching arrangements. An exemplary embodiment includes a switching arrangement for an antenna device operational in at least two frequency bands. In this example, the switching arrangement generally includes a switching device that is switchable into at least a first state and a second state. The switching device includes at least a first port, a second port, and a third port. The first port is connectable to an antenna device. The second port is connected to the first port in the first state. The third port is connected to the first port in the second state. The switching arrangement includes an inductor connected between the first port and ground.

Abstract: An exemplary embodiment of an antenna system includes a metal cover for a radio communication device and a complementary antenna. The metal cover includes front side part, a first back side part connected to the front side part through a top side part, and a second back side part connected to the front side part through a bottom side part. The bottom and top side parts are positioned at opposite ends of the front side part. The first and second back side parts are positioned essentially coplanar and distanced from each other by a gap. The front side part comprises a recess at the bottom side part and/or at the top side part in which recess the complementary antenna is positioned in.

Abstract: The present invention relates to an antenna device for a portable radio communication device adapted for receiving and/or transmitting radio signals in at least a first and a second operating frequency band, said antenna device comprising a half-loop radiating element, comprising a feeding portion and a grounding portion, and arranged to operate at FM frequencies. The antenna device comprises a capacitor at said feeding portion and an inductor at said grounding portion, and said half-loop radiating element is arranged to simultaneously with FM frequencies operate at frequencies at least ten times higher than FM frequencies, wherein said capacitor is arranged to short circuit said half-loop radiating element to ground for frequencies at least ten times higher than FM frequencies and said inductor is arranged to short circuit said half-loop radiating element to ground for FM frequencies.

Abstract: An exemplary embodiment includes an antenna arrangement for a portable radio communication device having a metal casing. The antenna arrangement generally includes a first antenna device and a second antenna device. The first antenna device comprises the metal casing and has a first radiating antenna pattern. The second antenna device has a second radiating antenna pattern. The second antenna device is outside the metal casing.

Abstract: Exemplary embodiments are disclosed of metal covers for radio communication devices. In an exemplary embodiment, a metal cover for a radio communication device generally includes a front side part and first and second back side parts. The first back side part is connected to the front side part through one of a top side part and a bottom side part. The second back side part is connected to the front side part through the other one of the top side part and the bottom side part. The top and bottom side parts are at opposite ends of the front side part. The first and second back side parts are generally coplanar and spaced apart from each other by a gap.

Abstract: Exemplary embodiments are disclosed of antenna arrangements for portable radio communication devices. In an exemplary embodiment, there is an antenna arrangement for a portable communication device having a metal casing. The antenna arrangement generally includes a front side part of the metal casing. A first back side part is connected to the front side part through a top side part of the metal casing. A second back side part is connected to the front side part through a bottom side part of the metal casing. The bottom and top side parts are positioned at opposite ends of the front side part. The first and second back side parts are positioned and distanced from each other by a gap.

Abstract: Exemplary embodiments are provided of antenna devices for portable radio communication devices. In an exemplary embodiment, an antenna device generally includes a metal cover. The metal cover generally includes a front side part, a first back side part connected to the front side part through a top side part, and a second back side part connected to the front side part through a bottom side part. The bottom and top side parts are positioned at opposite ends of the front side part. The first and second back side parts are distanced from each other by a slot. The first back side part comprises a feed point positioned at the slot and a ground point. The first back side part is fed through the feed point.

Abstract: Exemplary embodiments are provided of antenna devices for portable radio communication devices. In an exemplary embodiment, an antenna device generally includes a metal front side part. A first metal back side part is electrically connected to the front side part through a metal top side part. A second metal back side part is electrically connected to the front side part through a metal bottom side part. The bottom and top side parts are positioned at opposite ends of the front side part. The first and second back side parts are distanced from each other by a slot. The front side part is operable for electromagnetically screening the antenna device from a display means of the portable radio communication device.

Abstract: The present invention relates to an antenna device for a portable radio communication device adapted for receiving and/or transmitting radio signals in at least a first and a second operating frequency band, said antenna device comprising a half-loop radiating element, comprising a feeding portion and a grounding portion, and arranged to operate at FM frequencies. The antenna device comprises a capacitor at said feeding portion and an inductor at said grounding portion, and said half-loop radiating element is arranged to simultaneously with FM frequencies operate at frequencies at least ten times higher than FM frequencies, wherein said capacitor is arranged to short circuit said half-loop radiating element to ground for frequencies at least ten times higher than FM frequencies and said inductor is arranged to short circuit said half-loop radiating element to ground for FM frequencies.

Abstract: The present invention comprises an antenna device for a portable radio communication device operable in at least a first and a second frequency band. 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 for feeding and receiving radio frequency signals, a first ground plane portion arranged at a distance from the first radiating element, a second ground plane portion, and a controllable switch arranged between the first and second ground plane portion for selectively interconnecting or disconnecting the first and second ground plane portion.

Abstract: The present invention relates to a portable radio communication device operable in at least a first and a second frequency band, the antenna device comprises a first electrically conductive radiating element comprises a first feeding portion connectable to a feed device (RF) of the radio communication device for feeding and receiving radio frequency signals, a ground plane provided at a distance from the first radiating element, a DC-blocking device connecting the first electrically conductive radiating element and the ground plane at a first position, and a controllable switch connecting the first electrically conductive radiating element and the ground plane at a second position.

Abstract: The present invention relates to a metal cover (1) for a radio communication device. The metal cover (1) comprises a through non-conductive hole forming a slot (4; 10) through the metal cover (1), and a radio frequency feed (6, 7; 8, 9), wherein the radio frequency feed (6, 7; 8, 9) is arranged across the slot (4; 10) to feed the slot (4; 10) as a slot antenna for the radio communication device.

Abstract: An antenna device for a portable radio communication device adapted for receiving radio signals comprises an internal radiating element (10) comprising at least one feeding portion (21, 22) connected to a receiver circuit (40). The radiating element (10) comprises an electrical impedance (30) that is controllable in dependence on the desired frequency range of the received signals, wherein the feeding portion (21, 22) is connected to a feeding input (40a, 40b) on the receiver circuit and the control input of the controllable electrical impedance (30) is connected to an output (40c) on the receiver circuit (40) intended for the control of the VCO resonance frequency of the receiver circuit.

Abstract: The present invention comprises an antenna device for a portable radio communication device operable in at least a first and a second frequency band. 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 for feeding and receiving radio frequency signals, a first ground plane portion arranged at a distance from the first radiating element, a second ground plane portion, and a controllable switch arranged between the first and second ground plane portion for selectively interconnecting or disconnecting the first and second ground plane portion.

Abstract: The present invention relates to a portable radio communication device operable in at least a first and a second frequency band, the antenna device comprises a first electrically conductive radiating element comprises a first feeding portion connectable to a feed device (RF) of the radio communication device for feeding and receiving radio frequency signals, a ground plane provided at a distance from the first radiating element, a DC-blocking device connecting the first electrically conductive radiating element and the ground plane at a first position, and a controllable switch connecting the first electrically conductive radiating element and the ground plane at a second position.