1N4007's have been used in high voltage discrete NLTLs.
Anritsu use NLTLs in theire VNA samplers:
Even Ceramic capacitors have been tried:
Bruce
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On 25 July 2018 at 13:56 Mark Kahrs <mark.kahrs@...> wrote:
I hate to disagree with Jose, but there have been a fair number of papers
on constructing NLTLs --- some even using discrete diodes.
If you'd like to read a review of the patents, may I refer you to this
short paper? I know the author personally.
Patents and Microwave Measurements-Nonlinear Transmission Lines [TCC
Tidbits] <>
<>IEEE Microwave Magazine
<>
Year: 2016, Volume: 17, Issue: 7
<>
Pages: 78 - 81
On Tue, Jul 24, 2018 at 1:00 PM, Craig Sawyers <
c.sawyers@...> wrote:
FWIW non-linear optical methods are used to compress the length of laser
light pulses. Somewhat
analogous to NLTL's, but at 10^14Hz.
Craig
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ed
Breya via Groups.Io
Sent: 24 July 2018 17:32
To: [email protected]
Subject: Re: [TekScopes] Homemade tunnel diodes
Jose said:
"Not many people seem to have made DIY NLTL, let alone samplers based on
it."
This is probably true, because NLTLs usually have lots of stages, so can
get very big and
complicated
before you get remarkable compression. For simplicity and effectiveness,
a single SRD/varactor of
the
right type, in the right circuit environment, is pretty hard to beat for
straight up impulse
generation or
frequency multiplication. A whole bunch of them cascaded can form a
NLTL, with its edge-
enhancement and wide BW. As always, it depends on the particulars of the
application.
I don't think there's a need for a "modern" replacement for the
SRD/varactor. It's a common RF
part -
not at all an obsolete technology. Nowadays there are alternatives for
many applications, by using
fast
active devices capable of appropriate edge speeds.
Ed
