Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
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My Hobby Website:
difference between RFIC and RF/Microwave circuits - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
Twitter were overwhelmingly dominating online personal interaction, and RF Cafe
Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: Question: difference between RFIC and RF/Microwave
circuits Posted: Tue Feb 07, 2006 12:18 pm
What is the difference
between RFIC and just plain RF/Microwave circuits? I know one is integrated
circuit and one is just more traditional using surface mount(microstrip)
etc. But my main question is in what applications do you need RFICs
and when do you design just RF circuits.
Post subject: RFPosted: Wed Feb 08, 2006 12:07
RFIC -- active and passive devices integrated on chip -- hence
the name integrated circuit.
RF/Microwave -- USUALLY discrete
using transmission lines, discrete transistors.
Post subject: Posted: Thu Feb 09, 2006 2:34 am
Joined: Tue Dec 13, 2005 2:42 am
I feel no difference.
Post subject: Difference between RFIC and Microwave CircuitsPosted:
Thu Feb 23, 2006 8:15 am
Joined: Fri Feb
17, 2006 12:07 pm
Location: London UK
the size, but that comes about because of the high dielectric constant
used for RFICs. It means a wavelength in the material is physically
very short, so elements that should resonate can be tightly packed together
in an RFIC. The dielectric constant for typical microwave substrates
is 2.2 compared with 10 or 20 for RFICs.
The electric fields
are physically constrained by high e materials in RFICs, so circuit
element interaction is less of a problem, compared with Microwave stripline
circuits, in which layout is crucial to successful design.