Dear Electronics Marketer,
The editors of RF Design posed six questions to six panelists on the topic of
system
level
verification of RF circuits at the at IEEE MTT-S International
Microwave
Symposium, June
14th, 2006.
Their responses have been compiled in the cover feature of September
RF Design and
offers a compelling read to over 40,000 loyal readers of
RF Design. In essence,
the panel
discusses pros and cons of various
methods that enable system-level
verification of RF
circuits, a topic of
utmost concern as engineers weigh the trade-off between fidelity and
speed.
The panelists include Colin Warwick of
The MathWorks; Juergen Hartung of
Cadence
Design Systems; Niranjan
Kanaglekar of Agilent Technologies;
Jan Niehof of Philips
Research Laboratories;
Ray Arkiszewski of RF Micro
Devices and Yasunori Miyahara of
Matsushita Panasonic.
Equally compelling are the three additional feature articles on Tx/Rx
Technology,
Software
Radio and Time & Frequency.
For a glimpse into the future of RFID, the September issue of Emerging
Wireless
Technology
is an issue no one will want to miss. While RFID is
NOT a new
technology,
a range of
developments in the areas of tags, readers
and applications
are now
garnering increased
industry attention. This issue will
examine some of those
recent technological developments
in the area of RFID,
including areas such
as standards efforts, wireless mesh and wireless
microsensors.
Your ad in this issue assures you that you will reach the readers at the
moment
they
are seeking solutions for their next generation designs.
Best regards,
Judy Miller
Associate Publisher
212-204-4246
Design Tools
Dueling dualities: How to best marry time-domain system-level verification
with
frequency-domain RF circuit simulations?
This article is a "virtual panel" discussion, based on an actual panel presented
at
IEEE
MTT-S International Microwave Symposium, June 14th 2006.
RF Design posed six questions to six panelists on the topic of system-level
verification
of RF circuits. Their responses have been compiled in this article. In
essence, the panel
discusses pros and cons of various methods that enable
system-level verification of RF
circuits. For instance, what methods offer a
useful trade-off between fidelity and speed?
Tx/Rx Technology
Reducing the design complexity of next-generation handsets:
Closed and Open Loop Polar Techniques
The original technical standard for GSM has evolved in recent years to now
include
multimode operation, the addition of RF bands, and the inclusion of
the EDGE modulation
format — which effectively triples the transmission rate
while using the same bandwidth.
Because EDGE also introduces amplitude
modulation variation as compared to the earlier
constant-envelope GMSK
modulation format, EDGE radio architectures must deliver better
spectral
purity and modulation quality in order to deliver the necessary linear performance.
The use of Polar Loop transmitter technology has solved this challenge and is
most effective
when implemented as a closed loop system. in this article, Jennifer
Chou, Skyworks
Solutions, Inc.,
discusses the many available Polar Loop technology
options that are used
for various EDGE systems, including direct launch conversion
transmitter (DCT), small signal
polar loop (sometimes called “Polar Lite”), and
large signal open polar loop. And compares
them to the more effective, large
signal closed polar loop solutions which deliver the best
overall system performance
and ease of manufacturing.
Software Radio
Mitigating interference to maximize spectral efficiency in 3G/4G networks
With the advent of data applications, and multiplicity of communications protocols,
interference is a big challenge for wireless carriers. Consequently, mitigating
interference
to maximize spectral efficiency and improve network throughput is
constantly on the minds
of operators and handset makers. Tom Cullen,
TensorComm, describes a novel interference
cancellation technology (ICT),
comprising an ASIC/core hardware and DSP based software,
that cancels
interference from all traffic channels, and from all interfering sources for 2.5G, 3G
and 4G networks. It improves carriers’ existing infrastructure and spectrum by
50% or more by
enhancing operator's data rates, capacity and coverage on existing
and emerging wireless
networks. In addition, the article presents field tests
conducted in conjunction with major wireless
networks and handset vendors.
And shows how easily ICT can be integrated into existing handset technology
without form factor changes or RF redesign.
Time & Frequency
Design and performance of precision TCXO’s
Ever since the advent of quartz crystals as frequency control devices, there has
been an on-going
quest to improve their temperature stability. This article, provided
by Steve Fry, Greenway
Industries, Inc., begins with a brief review of the history of
crystal oscillator temperature compensation
and will then concentrate on the present
state-of-the-art in TCXO technology and the associated
crystal resonators. The
current mixed-mode ASIC’s which perform the temperature compensating function
will be described. Presently achievable performance parameters and characterization
will then
be presented
including: static frequency stability vs. temperature,
perturbations
and micro-jumps,
hysteresis, aging, short term stability
and
phase noise. Future
trends will also
be examined.
Emerging Wireless Technology
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This issue examines some of the recent technological developments in the area
of RFID.
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Radio, Emerging
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