New Brochure on RF Test Cells Benchtop
ETS-Lindgren has released a new brochure on RF Test
Cells. The brochure presents detailed information, including
construction and capabilities, on a variety of standard and
custom benchtop systems for RF isolated measurement. Full
specifications and shielding data for each test cell is also
ETS-Lindgrens 5210 and 5220 Test Cell Series are typically
used for testing small wireless devices. Both series include
near field coupling devices and have interiors lined with
premium RF anechoic absorber on all six surfaces. Welded construction
and a dual latched, zero perimeter lid with finger stock provides
typical RF isolation of 80dB.
The 5230 Test Cell Series is an upright benchtop system for
testing larger sized DUTs. The welded construction offers
a progressive RF gasket compression mechanism with typical
RF isolation of 80dB. The zero perimeter door means that bigger
DUTs can be more easily placed inside and staged for testing.
With a typical RF isolation up to 120dB, the 5240 Series,
also an upright model, can be constructed of steel, aluminum
or copper panels. The door is a maximum performance DEI RF
sealing door with two toggle action-over-center draw latches.
Contact ETS-Lindgren, phone: (630) 307-7200, fax: (630) 307-7571,
e-mail: email@example.com, or visit: www.ets-lindgren.com.
EMI Gasket Catalog
Laird Technologies has a catalog outlining its full line of
copper beryllium strip metal gaskets, grounding products and
connector shields, along with load/compression data, shielding
effectiveness charts and numerous new product additions. Laird
manufactures EMI shielding, thermal interface and wireless
antenna products for computer, telecommunications, aerospace,
defense, medical, automotive and general electronics industries.
Contact Laird Technologies, phone: (800) 843-4556 or contact
RF and Microwave Power Amplifier Design
The main objective of this book, written by Andrei Grebennikov
(432 pages, $99.99), is to present all the relevant information
required to design RF and microwave power amplifiers. Included
are well-known and novel theoretical approaches and practical
design techniques as well as suggestions on design approaches
combining analytical calculations and computer aided design.
In Chapter 1, the two-port networks are introduced to describe
the behavior of linear and nonlinear circuits. Chapter 2 presents
widely used design techniques to analyze nonlinear power amplifier
circuits. In Chapter 3, all the necessary steps to provide
an accurate device modeling procedure, starting with the determination
of the small-signal equivalent circuit parameters, are described
and discussed. A variety of nonlinear models for MOSFET, MESFET,
HEMT and bipolar devices, including HBT, which are very prospective
for modern microwave integrated circuits of power amplifiers
and oscillators, are presented.
Chapter 4 covers impedance matching, which is very important
when designing power amplifiers. Chapter 5 describes the basic
properties of three- and four-port networks as well as a variety
of different combiners, transformers and directional couplers
for RF and microwave power applications. Chapter 6 presents
the fundamentals of power amplifier design, which is generally
a complicated procedure when it is necessary to provide simultaneously
accurate active device modeling, effective impedance matching
depending on the technical requirements and operating conditions,
stability in operation, and ease in practical implementation.
Chapter 7 includes details on the possible circuit solutions
to provide a high efficiency power amplifier operation based
on using different overdriven B, F and E classes of operation
or newly developed subclasses. Chapter 8 covers power amplifier
design based on a broadband concept that provides some advantages
when there is no need to tune the resonant circuit parameters.
Chapter 9 describes the different approaches to improve linearity
and efficiency of the power amplifiers in telecommunication
To order, contact: McGraw-Hill, 2 Penn Plaza, New York, NY
10121, phone: (212) 904-2000.
EMC Shortform Catalog
A new EMC shortform catalogue from Schurter contains details
of an assortment of power entry modules (with and without
filters), block filters, chokes, pulse transformers and power
stage driver modules.
The components and product information are designed to support
design engineers of single-phase and three-phase AC power
supplies and the like.
Presented with functional selector charts, type reference
and distribution information, as well as a clear structure,
the new shortform provides designers with quick access to
specific products of interest.
For information, visit www.schurter.com.
IEEE 802.11 Handbook
The IEEE, under its Standards Information Network, has published
a second edition of the IEEE 802.11 Handbook: A Designers
Authored by Bob OHara and Al Petrick, the new edition
provides the most up-to-date information available on the
IEEE 802.11 standard and its numerous amendments, including:
802.11d, P802.11e, 802.11F, 802.11g, 802.11h, 802.11i, 802.11j
and 802.11n. It provides a preface authored by Stuart J. Kerry,
chair of the 802.11 Committee, along with a detailed list
of abbreviations and acronyms.
The increasing need for mobility has spawned the greatest
growth in the use of wireless technology. As IEEE 802.11 equipment
moves into its second stage, the new handbook will help system
network architects, and hardware and software engineers stay
informed on the underlying technology that makes wireless
mobility a reality.
To order, visit http://shop.ieee.org/ieeestore.
NPL EMC Antenna Guide
The United Kingdoms National Physical Laboratory has
updated its Measurement Good Practice Guide: Calibration
and use of antennas, focusing on EMC applications. It
contains updates to address antenna calibration from 30Hz
to 40GHz. The guide covers monopole, loop, dipole, biconical,
log-periodic and horn antennas used in EMI emissions testing
in open area test sites and fully anechoic chambers.
The guide also covers the assessment of uncertainties in their
use for radiated-emission measurements based on EMC standards.
Expanded sections include those on horn and rod antennas,
with more detail on calibration methods and uncertainties
than in previous editions. New sections include TEM cells,
the calibration of loop antennas, and designing a ground plane.
The guide covers background to uncertainties in emission testing
and the use of antennas, background to the tuneable dipole
antenna, measurement of near-field strength, emission measurements
in screened rooms operating below cutoff, choosing the right
calibration, the role of a national standards laboratory for
antenna measurement, self-calibration using transfer standards,
and calibration intervals.
EE Times Updates List of 60 Emerging
The EE Times 60 Emerging Startups list, first published as
the Silicon Strategies 60 Emerging Startups in April 2004,
has been updated to version 3.0 to reflect the latest corporate,
commercial and technological conditions.
Some companies have dropped off the list, otherwise known
as The Silicon 60, because they have been acquired; some have
moved to an initial public offering of shares; and others
have moved beyond the list with the passage of time. Other
younger startups have been nominated to move off the EE Times
radar list and onto the main list.
In version 3.0, the magazines editors have selected
companies based on a mix of criteria including: technology,
intended market, maturity, financial position and investment
profile. Startups on the list include companies involved in
semiconductors, fab equipment, packaging, foundry, materials,
MEMS and EDA software.
Readers can nominate their own emerging startups for inclusion
on a future list. Nominations should be accompanied by a short
explanation of support. Send comments and nominations to Peter
Clarke (pclarke @cmp.com) or Mark Lapedus (firstname.lastname@example.org).
To view the list, visit www.eetimes.com.
2005 Could Be Breakthrough Year for
Broadband over powerline (BPL) technology may be primed
for real growth in 2005 and beyond across the United
States, according to a report by the New Millennium Research
Council (NMRC). Trials and actual commercial deployments of
BPL systems are on the rise, with over 20 projects in operation
in 2004 and more expected to come online in 2005. By one estimate,
roughly a quarter million homes in the United States already
had the opportunity to choose BPL services in 2004.
Entitled Powering the Broadband Market in 2005 and Beyond,
the NMRC publication asks: Is 2005 the year of BPL?
There are a number of signs that suggest this could be the
time the technology begins its emergence as a viable competitor
in the broadband market ... Today, electric utilities across
the country are deploying the necessary technology to provide
broadband and other advanced communications services, such
as Voice over Internet Protocol (VoIP), via the power lines
that connect to virtually every home and business. Many industry
watchers and representatives now believe BPL can dramatically
change the landscape of the broadband market, offering new
forms of competition and delivering high-quality service to
remote areas. During the past two years, the commercial and
media perspectives on BPL in the United States have evolved
from categorizing the technology as almost ready
to really here.
Though still in its early stages in the U.S., BPL technology
already is available in such places as sections of New York
City (ambient) and in what is the first city-wide commercial
BPL network in the United States in the suburban Washington,
D.C. community of Manassas, Virginia (Communication Technologies,
Inc., or COMTek). Both of the firms are profiled in the report.
For the full text of the NMRC report, visit: www.thenmrc.org.