摘要:
The present invention relates to an antenna device for a portable radio communication device, wherein the antenna device comprises an elongated radiating element (1) configured to, in a first state, work as an electric resonant monopole antenna and to, in a second state, work as a magnetic resonant half-loop antenna.
摘要:
A multi-band antenna device (10) for a portable radio communication device comprises a parasitic element (14) and a radiating element (12) including a feeding section (16), a length varying section (18) and first and second dual band sections (20, 22). The feeding section (16) stretches along the parasitic element (12). The length varying section (18) is further distanced from the parasitic element (14) than the feeding section (16) and includes a first and a second parallel branch (24, 26) as well as a switch (SW) The first branch (24) is shorter than the second branch (26) for providing resonance in a first frequency band while the second branch provides resonance in a second frequency band. The first and second dual-band sections (20, 22) together provide resonance in a third frequency band.
摘要:
It is presented an antenna device for a mobile communication terminal comprising: a radiating element and a connection point on the radiating element. The radiating element comprises at least one section arranged at a position which comprises an area of the radiating element with an electric field which is, when the antenna device is in use, stronger than an average electric field of the radiating element. Furthermore, the at least one section is arranged closer to a ground plane of the mobile communication terminal than other parts of the radiating element, and the at least one section is essentially parallel to the ground plane. A corresponding mobile communication terminal is also presented.
摘要:
The present invention relates to an antenna device for a portable radio communication device (20), wherein the antenna device comprises a main radiating element (1) and a diversity radiating element (2). The main antenna radiating element (1) is configured to be positioned in a first position and the diversity radiating element (2) is configured to be positioned in a second position of the portable radio communication device (20), wherein a user unlikely positions his fingers at the first and second positions at the same time.
摘要:
A quad-band antenna device (10) for a portable radio communication device comprises an electrically conductive radiating element (11) having an electrical length selected to provide resonance in a first set of frequency bands frequency band. The element includes a first elongated section (12, 13, 14) having a first edge (22, 23, 24) and a second section (15) having a second edge (25, 26, 27) and being joined to the first section via an interconnecting section (16), which second edge (15) faces, is displaced from and stretches along the first edge. In this way a gap (G1, G2, G3) is formed between the first and second sections. The dimensions of this gap are selected to provide resonance of the first electrically conductive radiating element in a second set of frequency bands.
摘要:
The present invention relates to an antenna arrangement for a portable radio communication device, such as a mobile phone, and a portable radio communication device comprising such an antenna arrangement. The antenna arrangement is characterized in that a first connection portion (14, 15; 19, 20; 22, 23, 24, 25) has a first segment extending between a flexible antenna element (10) and a connection device (11) and a second connection portion (14, 15; 19, 20; 22, 23, 24, 25) has a second segment extending between the flexible antenna element (10) and the connection device (11), such that the sum of the extensions is constant irrespectively of mounting displacement of the flexible antenna element (10) on a support structure (9). (Fig. 6)
摘要:
An antenna device for a portable radio communication device adapted for receiving radio signals a first radiating element (10) and a second radiating element (20). A filter and amplifier stage (30) interconnects the first radiating element and a receiver device for radio signals. By operating in two modes, wherein the second radiating element (20) is connected and disconnected, respectively, an antenna device can operate depending on operating conditions and user preferences.
摘要:
An antenna device for a portable radio communication device comprises a radiating element (10), a filter stage (20) connected to the radiating element, and an amplifier stage (30) connected to the filter stage and connectable to a receiver device for radio signals (40). By providing an amplifier stage that is not unconditionally stable, an antenna device having advantageous characteristics is achieved.
摘要:
An antenna device for a portable radio communication device adapted for receiving radio signals comprises a radiating element (10) and an amplifier stage (30) with a transistor (31) with a gate, a source, and a drain, said transistor having a minimum noise figure below 1 dB and a gain above 15 dB in the first operating frequency band. The source of the transistor is connected directly to ground. By providing a transistor with these characteristics in this way, stable operation is achieved with high gain amplification.
摘要:
The present invention relates to a multiple-turn loop antenna arrangement comprising a multiple-turn loop element (1) arranged in a first layer and a ground plane element (2) arranged in a second layer, wherein the first and second layers are arranged in parallel and the multiple-turn loop element (1) is arranged on top of the ground plane element (2), and wherein the ground plane element (2) comprises slots (3, 4; 5) interrupting eddy currents in the ground plane element (2), which would short signals in the multiple-turn loop element (1).