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Electronic apparatus with an antenna

Electronic apparatus with an antenna description/claims

This is a divisional patent application of copending application Ser. No. 11/534,524, filed, 22 Sep. 2006, entitled “Electronic Apparatus with an Antenna”. The aforementioned application is hereby incorporated herein by reference.

The present invention relates to an electronic apparatus with an antenna, its anti-jamming system and its method, and more particularly to an electronic apparatus that integrates an antenna with a casing to prevent the clock signal of a display module from interfering the electronic apparatus of a wireless communication module.

As wireless transmission technologies are well developed, wireless data receiving and transmission become basic functions of many electronic apparatuses. For example, a notebook computer can support the functions of transmitting many different wireless network signals including wireless local area network (WLAN) signals, wireless Bluetooth signals and digital television signals, etc. To receive these wireless signals at different bands, it is necessary to build many antennas in the notebook computer. Referring to FIG. 1 for the design of a traditional antenna of a notebook computer 1, the notebook computer 1 installs two detachable antennas 13, 14 around a screen 12 in a casing 11, and the size of the antennas 13, 14 is restricted by the limited available space around the periphery of the screen 12.

As to the radio frequency signals with a frequency of 2.4 GHz or 5 GHz, only a small antenna is sufficient. For example, the length of a dipole antenna with a primary frequency of 5 GHz is approximately equal to 3 cm, and the antenna with a primary frequency of 2.4 GHz is approximately equal to 6 cm. For signals with a lower frequency such as the very high frequency (VHF) signal (45 MHz˜300 MHz) or the ultra high frequency (UHF) signal (300 MHz˜900 MHz) of a digital television, the required length of the antenna is very long. For instance, the length of a dipole antenna with a primary frequency of 150 MHz is approximately equal to 100 cm, and the length of a planar inverted F antenna (PIFA) with a primary frequency of 150 MHz is approximately equal to 70 cm. As mentioned in these situations, it is quite difficult to install such a long detectable antenna into a notebook computer 1 in accordance with the prior art, and thus the notebook computer 1 requires a connecting device such as a SMB or MMCX connector to connect an external antenna 15 for receiving or transmitting a signal of a lower frequency. However, the use of an external antenna 15 not only bends or breaks the antenna easily due to collisions, but also causes inconvenience for users to carry and use the antenna.

As wireless communication applications become popular, various different portable electronic apparatuses are equipped with a wireless communication module. If the antenna is installed near a display device, the clock multiplication of the display device will interfere with signals within the operating band of the antenna, and thus lowering the wireless communication performance. For instance, a notebook computer comes with a GSM communication module, and its operating band falls in the range from 880 MHz to 915 Hz, and its antenna is installed in a display device casing of the notebook computer, and the clock of 70 MHz is adopted by the display device of the notebook computer for updating images, then the multiplication of the clock signal by 13 times (910 MHz) will interfere signals within the GSM operating band. If the electronic apparatus is equipped with only one kind of wireless communication module, then the aforementioned interference can be avoided by using a hardware circuit design. However, there are more and more wireless communication modules installed in an electronic apparatus, and one set of notebook computer may have a GSM communication module, a WCDMA communication module and a WLAN communication module at the same time. The band used for one kind of wireless communication module is different from the other, and the chance of having an interfered band is increased drastically, and the traditional hardware circuit design is no longer sufficient for preventing interferences.

In view of the shortcomings of the prior art, the inventor of the present invention based on years of experience in the antenna field to conduct experiments and modifications, and finally developed an electronic apparatus with an antenna, its anti-jamming system and its method to overcome the foregoing shortcomings.

The primary objective of the present invention is to provide an electronic apparatus with an antenna, its anti-jamming system and its method to improve the usable space of the antenna and prevent the signals within a band of the antenna from being interfered.

An electronic apparatus with an antenna in accordance with the present invention comprises a casing and an antenna. The antenna is composed of a patterned metal thin film and a carrier and provided for processing a wireless signal. The casing and antenna are made by injection molding.

In addition, the invention provides an antenna composed of a patterned metal thin film and a carrier for processing a wireless signal. The antenna and a casing of the electronic apparatus are made by injection molding.

Further, the invention provides a method for manufacturing a casing structure with an antenna, and such casing structure is applicable for an electronic apparatus. The method comprises the steps of: setting a patterned metal thin film on a carrier to form an antenna for processing a wireless signal; and placing the antenna into a mold for an injection process to form the casing structure.

The invention also provides an anti-jamming system applicable for an electronic apparatus, and the electronic apparatus includes a first module and a second module, and the first module processes a signal at a band, and the second module performs its operation according to a clock signal. The anti-jamming system comprises a detection module and a control module, and the detection module is provided for detecting an execution mode of the first module to produce a detection result, and the control module modulates a clock signal according to the detection result to prevent the multiplication of a clock signal from interfering with signals within this band.

The invention further provides an anti-jamming method applicable for an electronic apparatus, and the electronic apparatus includes a first module and a second module, and the first module processes a signal at a band and the second module performs its operation according to a clock signal. The method comprises the step of: detecting an execution mode of the first module to produce a detection result; and modulating a clock signal according to the detection result to prevent the multiplication of a clock signal from interfering with signals within this band.

In addition, the invention further provides an electronic apparatus with an antenna, comprising a wireless communication module, a display module, a detection module and a control module. The wireless communication module processes a signal at a band through an antenna. The display module has a clock generator for displaying an image according to a clock signal generated by the clock generator. The detection module is provided for detecting an execution mode of the first module to produce a detection result. The control module modulates the clock signal according to the detection result to prevent the multiplication of the clock signal from interfering with signals within this band.

To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and performance, we use preferred embodiments together with the attached drawings for the detailed description of the invention.

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