[Steve C. Cripps]Advanced.Techniques.in.RF.Power.Amplifier.Design

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吐血推荐，射频功率放大器设计经典书籍，不容错过，赶紧下载！

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第2部分下载

charlijun

奉献了两本经典，终于可以看附件了。

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good.

semico_ljj

好，
Cover design by Gary Ragaglia
© 2002 ARTECH HOUSE, INC.
685 Canton Street
Norwood, MA 02062

semico_ljj

Preface
First of all, I should explain the title of this book. This is not really an
advanced book, but does cover topics which are generally of a less elementary,
or tutorial, nature than my first book. In RF Power Amplifiers for Wireless
Communications (RFPA, also published by Artech House), my overriding
goal was to present the subject material in a manner that is analytical but
hopefully still readable. Engineering literature has always bothered me. Both
books and technical journals seem to present everything couched in highlevel
mathematics which the majority of practicing engineers canít understand,
or at best donít have the time or inclination to decipher. There seems
to be an ìemperorís new clothesî situation about it all; make the subject as
difficult as possible, frequently much more difficult than it needs to be, and
you are almost assured of pious nods of approval in higher places. Lower
places, where most of us operate, offer a less reverent reception, but seem to
accept the situation nevertheless. The odd paper maybe progresses as far as
the fax machine or the filing cabinet, but then rests in peace and gathers dust.
I am encouraged, and very grateful, for the positive response to my modest
but radical attempts to change this situation in RFPA, and proceed with this
volume in very much the same spirit.
The intention is that this book can be regarded as a sequel to the first,
but can also be read in isolation. It would be appropriate, therefore, to restate
briefly some of the philosophy and goals that carry over. First and foremost,
the spirit of a priori design methods remains paramount. Simulation tools are
getting better all the time, but the advantages of performing symbolic analysis
using simplified models before engaging in number crunching are still
persuasive. Indeed, not being a particularly advanced mathematician myself
helps in that I feel it is easier to present readable symbolic analysis, rather
than the seemingly statutory unreadable stuff which abounds in the more
ìlearnedî literature.

semico_ljj

This book covers some new topics that barely got a mention in RFPA,
and takes some others which, although covered in the first book, deserve
more detailed treatment. Bipolar junction transistors (BJTs), for instance,
were barely mentioned in RFPA and with the advent of heterojunction bipolar
transistors (HBTs) and Silicon Germanium (SiGe) technology, things are
hotting up again for the BJT (pun somewhat intended). Chapter 1 revisits
the basics of Class AB operation, but with greater emphasis on BJT applications.
Microwave power amplifier applications also get a chapter of their
own, Chapter 7, in which an attempt is made to pull together some of the
techniques which were developed in the 1970s and 1980s for higher frequency
(> 2 GHz) broadband amplifier design, and which could easily come
back on stream again as wireless communications run out of bandwidth at
the low end of the microwave spectrum.
Other chapters pick up on some of the things that were introduced in
RFPA, but not wrung out to some readersí satisfaction. For all my enthusiastic
promotion on the Doherty and Chireix techniques in RFPA, these admirable
inventions still appear to remain firmly rooted in history and vacuum
tube technology. So Chapter 2 revisits these topics regarding especially their
potential role in the modern scene. This includes a more generalized analysis
of the Doherty PA and some simulation results on practical implementations.
The Chireix method continues to be a talking point and not much
else; Chapter 2 attempts to dig a little deeper into why this should be.
Chapter 3 takes up the theme of nonlinear effects in PAs, with a particular
emphasis on the problem of asymmetrical IM distortion, its causes
and possible remedies. This chapter also has some tutorial material on the
behavioral modeling of PAs and attempts to show that there is still much useful
life left in polynomials and Volterra series modeling methods. In particular,
the use of dynamic, rather than static, characterization methods are
discussed in relation to memory effects.
Linearization is, of course, an inescapable aspect of the modern PA
scene. Equally inescapable, it seems, is the growing impact of digital signal
processing (DSP) techniques in this area. Chapters 4, 5, and 6 cover the three
main linearization topics of feedback, predistortion, and feedforward. In
these chapters I find myself up against a burgeoning and already voluminous
literature, and also topics of current research which are engaging many
thousands of engineers all over the world. I have therefore not attempted to
cover each topic in an exhaustive manner. I have basically applied my statutory
methods of symbolic analysis using simplified models, and I believe
come up with some useful results and observations. Most of the material in
Chapters 4, 5, and 6 represents, I believe, at least a different angle on the subject
and as such is hopefully complementary to existing published accounts.
As a PA designer myself, one aspect which I have attempted to emphasize
throughout these three chapters is the need to redefine, and even to rethink,
the design of a PA which is to be used in any linearization system. This is an
aspect of the business which I feel has not been adequately considered, for
the logistical reason that PA linearization and PA design are frequently done
by different groups of people or different organizations.

[ 本帖最后由 semico_ljj 于 2007-1-26 10:23 编辑 ]

semico_ljj

I must make some comments on the patent situation in this field. This
book deals with a technology that has been the focus for much patent activity
over the years, and especially within the last decade or so. It seems that patents
are now being issued not just for specific implementations, or variations
of well-established techniques, but in some cases for the well-established
techniques themselves. This is a big headache for any company wishing to
enter into the wireless communications PA business, and poses a problem for
an author as well. To generate a comprehensive, exhaustive list of relevant
patents would be a task comparable to writing a whole new book. Indeed,
perhaps it is a book someone should write. My policy has been to refrain
completely from citing individual patents as references, other than one or
two historical ones. This avoids any conflict where opposing factions may be
claiming priority and only one gets the citation. It does not, however, avoid
the possibility that I may be describing, or proposing, something that has
been patented sometime, by somebody. I have tried in general throughout
this book to make the reader aware of the need to perform patent searches
in this business if a commercial product is being contemplated. I have also
made specific comments about the likelihood of patents in certain focused
areas. In general, I have included a few ideas of my own in most chapters
(usually under the subheading ìVariationsî). These suggestions are my own
independent ideas and do not represent any commercial products of which I
am aware. They have not, however, been subjected to any patent search.
Unlike the previous book, which had substantial continuity from chapter
to chapter, this book treats the numerous topics in a manner which does
not always fall into a seamless narrative. Such is the nature of ìmore
advanced topics.î This is, primarily, a theoretical book; for the most part
I am analyzing how things work, and developing a priori methods for
designing them. It is not a step-by-step guide on how to build RF power
amplifiers, advanced or otherwise. I believe that I am addressing topics which
RF designers, and especially those involved with RF power amplifiers, talk
about a lot amongst themselves. I therefore make no apologies for using more
words, and fewer equations, than in a conventional technical book.

semico_ljj

Selected Bibliography
The following books are recommended for further reading in related subject
areas not fully covered in this book.
Cripps, S. C., RF Power Amplifiers for Wireless Communications, Norwood, MA: Artech
House, 1999. Covers basic PA design at the circuit level and PA modes (referred to as RFPA
throughout this book).
Harte, L., and S. Prokup, Cellular and PCS/PCN Telephones and Systems, APDG Publishing,
1996. An introduction and technical overview of modern cellular communications systems.
Kennington, P. B., High Linearity RF Amplifier Design, Norwood, MA: Artech House, 2000.
A wide-ranging treatment of PA linearization topics.
Minnis, B. J., Designing Microwave Circuits by Exact Synthesis, Norwood, MA: Artech House,
1996. Detailed treatment of broadband microwave circuit synthesis methods.
Ojanper‰, T., and R. Prasad, Wideband CDMA for Third-Generation Mobile Communications,
Norwood, MA: Artech House, 1998. Introduction and comprehensive treatment of 3G
communications systems.
Pothecary, N., Feedforward Linear Power Amplifiers, Norwood, MA: Artech House, 1999.
Specific coverage of feedforward techniques, emphasis on practical system issues.

semico_ljj

References
[1] Smith, C. R., et al., ìThe Microwave Power Module: A Versatile RF Building Block
for High Power Transmitters,î Proc IEEE, Vol. 87, No. 5, May 1999, pp. 717ñ737.
[2] Brune, O., ìSynthesis of a Two-Terminal Network Whose Driving-Point Impedance
Is a Prescribed Function of Frequency,î J. Mathematics and Physics, Vol. 10, No. 3,
October 1931, pp. 191ñ236.
[3] Bode, H. W., Network Analysis and Feedback Amplifier Design, New York: Van Nostrand,
1945.
[4] Matthaei, G., L. Young, and E. Jones, Microwave Filters, Impedance Matching Networks,
and Coupling Structures, New York: McGraw-Hill, 1964.
[5] Minnis, B. J., Designing Microwave Circuits by Exact Synthesis, Norwood, MA: Artech
House, 1996.