Designing Bipolar Transistor Radio Frequency Integrated by Allen A Sweet B.S. M.S. Ph.D.

By Allen A Sweet B.S. M.S. Ph.D.

Radio frequency built-in circuits (RFICs) are a massive a part of present day instant communications units and infrastructure. An RFIC layout process regarding state-of-the-art bipolar applied sciences (GaAs HBT or SiGe HBT) has won acceptance between engineers as a result of its skill to maximise functionality; although, it's been mostly neglected in specialist reference books. This booklet fills the space, delivering practitioners a close therapy of this more and more very important subject. From discussions of key functions (Bluetooth, UWB, GPS, WiMax) and architectures...to in-depth insurance of fabrication applied sciences and amplifier design...to a glance at functionality tradeoffs and creation charges, this ebook palms engineers with entire layout knowledge for his or her tough paintings within the box.

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Extra resources for Designing Bipolar Transistor Radio Frequency Integrated Circuits (Artech House Microwave Library)

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The most straightforward way to accomplish this is to use a circuit called a polyphase network. This network has a single input but two outputs, one of which is phase-shifted relative to the other input by exactly 90º. 7. A simple single-section, low- or high-pass filter of the type discussed in Chapter 6 may also be used to generate a 90º phase shift between two LO signals in an I/Q downconverting mixer. 8, and the use of a digital frequency divider circuit, which naturally can produce several outputs in various phase configurations by using digital techniques.

The maximum anticipated data rate is 70 Mbps. It is possible that users who are not located in “line of sight” from a base station antenna tower may have to accept lower data rate as a necessary trade-off for achieving a usable signal-to-noise ratio to produce an acceptable bit-error rate. WiMax is still in its infancy as far as hardware development is concerned. There is great potential for RFIC development in support of WiMax. In fact, WiMax may become the number one driver of RFIC development at frequencies above 10 GHz.

This means it is possible to choose the first IF frequency to be high in order to simplify the design of the image filter and, at the same time, to choose the second IF frequency to be low in order to allow the channel-select filter to be simple, inexpensive, and effective as the ultimate determiner of the channel bandwidth and interference rejection. The double-conversion superheterodyne receiver is truly the gold standard of all communications receiver architectures, and it has remained in this enviable position for many years.

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