1. Field of the Invention
The present invention relates to a printed circuit board (PCB) antenna and, more particularly, to a PCB antenna capable of receiving four operating bands.
2. Description of Related Art
Recently, wireless communication products have gradually become a part of regular living. For example, mobile communication devices such as cell phones, have advanced to the “Third Generation” (3G) while ‘bluetooth’ products, providing great flexibility of PC devices etc, are becoming commonplace. The design of modem wireless communication products places great emphasis compactness, versatility, portability and aesthetics. However, when integrating a wireless communication product with a contemporary antenna, the size and appearance of the antenna seriously detract from the aesthetics of the communication product. Furthermore, the antenna can receive only a single band signal, which is not satisfactory. Currently, commercial wireless applications are approaching maturity, especially in reference to the computer information industry such that change from a wired network to a wireless network is well under way. However, in response to 2.4 GHz˜2.5 GHz/5.15 GHz˜5.25 GHz/5.25 GHz˜5.35 GHz/5.725 GHz˜5.85 GHz frequency bands being opened by the global wireless local network market, it has become necessary to integrate a number of different band antennas into a single wireless communication product. This integration will occupy too much space in the communication products and reduce convenience and reliability in use.
Therefore, it is desirable to provide an improved antenna to mitigate and/or obviate the aforementioned problems.