Radio communications device with slot antenna
A wireless communication device, slot technology, applied in slot antennas, antenna supports/installation devices, antennas, etc., can solve the problems of not easy to small antenna broadband radiation, not easy, large volume, etc.
Inactive Publication Date: 2006-06-07
KONINKLIJKE PHILIPS ELECTRONICS NV
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- Application Information
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Problems solved by technology
For example, to achieve such a bandwidth through PIFA requires a considerable volume, because there is a direct relationship between the bandwidth of a patch antenna and its volume, but with the current trend towards small mobile phones, it is not easy to obtain such a volume
Therefore, it is not easy to achieve effective broadband radiation from the small antennas in today's wireless terminals because of the above limitations
[0004] Another problem with known antenna arrangements for wireless terminals is that these antenna arrangements are usually unbalanced and therefore strongly coupled to the terminal housing
Method used
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Embodiment Construction
[0028] Our co-pending international patent application WO 02 / 13306 (applicant's reference number PHGB0100056) discloses an antenna arrangement in which the housing of a wireless terminal, or another ground conductor forming part of the terminal, is passed through a suitable matching network is fed and acts as an effective broadband radiator. The entire content of this application is incorporated herein by reference.
[0029] Roughly, the combination of an antenna and a wireless terminal (eg a mobile telephone handset) can be seen as a symmetrical dipole antenna. figure 1 This model shows the impedance seen by a transceiver in a wireless handset at its antenna feed point in transmit mode. The first arm 102 of the asymmetric dipole antenna represents the impedance of the antenna and the second arm 104 represents the impedance of the handset, both of which are driven by a source 106 . As shown, the impedance of such a device is substantially equivalent to the sum of the impedan...
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A wireless communication device, such as a mobile phone or Bluetooth device, comprising a ground conductor (302) incorporating a slot (304), and means (308) for coupling a transceiver to the slot, thereby enabling the ground conductor to function as an antenna . Such an arrangement enables effective radiation performance to be derived from a much smaller volume than known antenna arrangements. In one embodiment, the ground conductor (302), slot (304), and transceiver are integrated in a module (206) suitable for connection to another ground conductor providing most of the antenna area. The other ground conductor is usually a printed circuit board ground plane or a mobile phone handset. Matching and broadband circuits can be conveniently incorporated into the modules. By changing the area of the connection between the module and another conductor, the resonant frequency of the gap (304) can be modified.
Description
technical field [0001] The present invention relates to a wireless communication device comprising a ground conductor and a transceiver, and further to a wireless communication device comprising such a device. Background technique [0002] Wireless terminals, such as mobile telephone handsets, typically include either an external antenna, such as a normal mode helical or meander line antenna, or an internal antenna, such as a Planar Inverted-F Antenna (PIFA) or the like. [0003] Such an antenna is small (relative to the wavelength), so it is narrowband due to the fundamental limitations of small antennas. However, cellular wireless communication systems typically have 10% or more of the bandwidth. For example, to achieve such a bandwidth through PIFA requires a considerable volume, because there is a direct relationship between the bandwidth of a patch antenna and its volume, but with the current trend towards small mobile phones, it is not easy to obtain such a volume . ...
Claims
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IPC IPC(8): H01Q1/24H01Q13/10H01Q13/16H01Q9/04H01Q1/38
CPCH01Q1/243H01Q9/0421H01Q13/10H01Q13/106H01Q13/16
Inventor K·R·博伊尔A·J·M·德格劳夫R·希尔P·J·马西
Owner KONINKLIJKE PHILIPS ELECTRONICS NV