By Cam Nguyen, Meng Miao
This booklet provides the layout of ultra-wideband (UWB) impulse-based transmitter and receiver frontends, working in the 3.1-10.6 GHz frequency band, utilizing CMOS radio-frequency integrated-circuits (RFICs). CMOS RFICs are small, reasonable, low energy units, larger fitted to direct integration with electronic ICs compared to these utilizing III-V compound semiconductor units. CMOS RFICs are hence very appealing for RF structures and, in truth, the vital selection for advertisement instant markets.
The publication includes seven chapters. the 1st bankruptcy supplies an advent to UWB expertise and descriptions its suitability for top solution sensing and high-rate, short-range ad-hoc networking and communications. the second one bankruptcy presents the fundamentals of CMOS RFICs wanted for the layout of the UWB RFIC transmitter and receiver offered during this e-book. It contains the layout basics, lumped and allotted parts for RFIC, structure, post-layout simulation, and size. The 3rd bankruptcy discusses the fundamentals of UWB platforms together with UWB merits and functions, signs, easy modulations, transmitter and receiver frontends, and antennas. The fourth bankruptcy addresses the layout of UWB transmitters together with an summary of easy elements, layout of pulse generator, BPSK modulator layout, and layout of a UWB tunable transmitter. bankruptcy five provides the layout of UWB receivers together with the layout of UWB low-noise amplifiers, correlators, and a UWB 1 receiver. bankruptcy 6
covers the layout of a UWB uniplanar antenna. eventually, a precis and end is given in bankruptcy 7.
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Additional resources for Design of CMOS RFIC Ultra-Wideband Impulse Transmitters and Receivers
The positive impulse signal generated directly from the tunable impulse generator and the negative impulse signal emerged from the CMOS inverter are fed to the BPSK modulator. Depending on the external high- or low-level modulating signal Vctl , the positive (high-level modulation) or negative (low-level modulation) modulated impulse output of the BPSK modulator is sent to the pulse-shaping circuit. Finally, the modulated positive or negative monocycle pulse signal is produced at the output of the pulse-shaping circuit.
The pulse tune-ability also provides the highly desired diversity for UWB impulse transmitters (and hence UWB systems), enabling them to function across multi-band which leads to enhanced information of targets. Electronically tunable pulse generators are also desired for measurement equipment. Tuning ability is also useful for compensating possible circuit performance variations caused by potential variations of circuit fabrication processes such as CMOS processes as well as temperature changes.
25-µm in , the tuning duration range with constant pulse amplitude improves signiﬁcantly. It should note that the ﬁnal impulse signal generated generally consists of three parts: rising edge, tunable relative time offset, and falling edge, as shown at node C of Fig. 9. For impulses with very narrow pulse widths, only parts of the rising 44 3 UWB Impulse Transmitter Design Fig. 15 Measured and simulated impulse signals with tunable pulse duration and falling edges of the square waves are involved in the pulse formation, resulting in amplitudes much smaller than those for wider pulses.