The paper looks at Bluetooth as a system and considers the link budget requirements to initiate and maintain communication between two devices. Interference rejection by means of packet frequency hopped data including an explanation of the National Semiconductor LTCC module, which consists of a radio, baseband, filter, switch and balun. How an antenna can be integrated with this module followed by integration of the module within a typical mobile phone with consideration to maintaining RF isolation between the GSM and Bluetooth antennas and other difficulties such as size limitations and de-tuning. Different types of antennas are considered for different applications such as laptops, printers and the benefits of using larger antennas that are not restricted in the same way as mobile antennas.
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