This book presents the theory, analysis, and design of multiband
dual-function microwave and millimeter-wave CMOS radio frequency
integrated circuit (RFIC) filter-switches capable of simultaneous
switching and filtering, which are relevant for advanced multiband
RF systems. Typical microwave and millimeter-wave switches are
designed only for switching purposes without considering frequency
selectivity or filtering. A separate filter is normally needed to
be used with a switch to provide a filtering function. This
conventional design approach hence leads to higher insertion loss,
larger size and higher cost for RF systems. RF systems operating
over multiple bands provide numerous advantages and offer more
capabilities for communications and sensing than their single-band
counterparts. A concurrent multiband system enables one single
system to be used over multiple bands simultaneously, leading to
optimum size, cost, and power consumption, together with ease of
system implementation. Truly concurrent multiband systems require
many components to work on multiple bands simultaneously, including
concurrent multiband switches. Microwave and millimeter-wave
integrated circuits using silicon-based CMOS (or related BiCMOS)
RFICs are less expensive and better suited to direct integration
with digital ICs than those using III-V compound semiconductor
devices. CMOS RFICs are also small and offer low power consumption,
making them suitable for portable battery-operated systems.
Accordingly, CMOS RFICs are very attractive for RF systems and are
the principal choice for commercial wireless markets. The content
is divided into six chapters, the first four of which describe and
address band-pass, high-pass, and low-pass filters, as well as
multiband band-pass filters, the fundamentals of switches, and
various switch architectures including single-pole single-throw
(SPST), single-pole double-throw (SPDT), transmit/receive (T/R),
and ultra-high-isolation switches, the fundamentals and models of
MOSFETs used in the design of switches, and the essentials of CMOS
RFIC design needed for the filter-switches presented in this book.
In turn, the fifth chapter presents the core of the book, namely
the design, simulation, and measurement of various CMOS dual-band
dual-function SPDT and T/R switches capable of concurrent switching
and filtering, as examples to illustrate the design of multiband
dual-function filter-switches. These components operate in two
different frequency bands centered at approximately 40 and 60 GHz
and 24 and 60 GHz. Lastly, a summary and conclusion are provided in
Chapter 6.
General
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