Since 2000, I have been creating custom
engineering- and science-themed crossword puzzles for the brain-exercising benefit
and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out
on whether or not this type of mental challenge helps keep your gray matter from
atrophying in old age, but it certainly helps maintain your vocabulary and cognitive
skills at all ages. A database of thousands of words has been built up over the
years and contains only clues and terms associated with engineering, science, physical,
astronomy, mathematics, chemistry, etc. You will never find a word taxing your knowledge
of a numbnut soap opera star or the name of some obscure village in the Andes mountains.
You might, however, encounter the name of a movie star ...
Anatech Electronics, an RF and microwave filter
company, has introduced a new line of suspended stripline and waveguide type RF
filters. Sam Benzacar wrote as part of
Anatech's June newsletter about his impressions of the IMS2019 trade show in
Boston. As you might guess, the main topic is 5G and the plethora of technologies
that stand to benefit from the incredible amount of bandwidth assigned to it over
many heretofore largely unused frequency bands. That is part of the challenge, and
the result will no doubt be the conquering of discouraging and difficult implementation
issues. Also included are a few news headlines related to Anatech's core business
of designing and manufacturing filters ...
The Moon Has a Smell.
"Antennas made of
carbon nanotube films are just as efficient as
copper for wireless applications, according to researchers at Rice University's
Brown School of Engineering. They're also tougher, more flexible and can essentially
be painted onto devices. The Rice lab of chemical and biomolecular engineer Matteo
Pasquali tested antennas made of 'shear-aligned' nanotube films. The researchers
discovered that not only were the conductive films able to match the performance
of commonly used copper films, they could also be made thinner to better handle
higher frequencies. At the target frequencies of 5, 10 and 14 gigahertz, the antennas
easily held their own with their metal counterparts ..."
"Researchers mixed two optical outputs of
a laser comb and modulated the result, then emitted this energy via an integrated
dipole antenna to create an RF signal in the 5-GHz band. We think of optical lasers
and microwaves as functioning in distinctly different regions and with disparate
modes within the broad electromagnetic spectrum. However, it doesn’t have to be
that way, as proven by numerous developments in integrated electro-optics. Now,
in a paper published in the Proceedings of the National Academy of Sciences with
the deceptively modest title 'Radio frequency transmitter based on a laser frequency
comb,' researchers from Harvard’s John A. Paulson School of Engineering and Applied
Sciences (SEAS) have demonstrated a laser that can emit encoded microwaves as wireless
RF si "