Am 01.09.21 um 19:42 schrieb Mike Monett:
Conventional samplers for home brewers usually go to 1 GHz. The SD-32
sampler for the Tektronix 11801C mainframe goes to 50 GHz. The HP 110GHz
oscilloscope costs around $1.3 Million USD, with a 10-bit resolution. Very
impressive.
I have a HP54750 sampling mainframe, the sampling plug-ins up to 50 GHz
54752A and differential TDR Agilent 54754A. Quite a lot of bang per buck
how our military colleges would formulate it. The plug-ins do also work
in newer mainframes.
I have invented a new sampling technology that promises 160 GHz bandwidth,
yet is affordable to home experimenters. If you can afford an IPhone or
IPad, you can afford this sampler.
This technology is not pie-in-the-sky. I made a basic 5 GHz version for the
University of Ludwigshafen, Germany, and they were very pleased with the
results. I am attaching images of the response compared to a
Tektronix 1502 TDR and the pcb as proof.
This was the first prototype, and I have made significant improvements
since then.
I have two questions for the time-nuts group:
1. where would a sampler with this bandwidth be useful?
You said it yourself: wideband scopes, TDRs, phase detectors for
frequency synthesizers, or spectrum/network analyzers. The 5G and
upcoming 6G cell phone world is your oyster. :-) And car radar @ 70 GHz.
The cost projection seems optimistic given that a female-female coax
connector barrel for 50 GHz easily costs a few hundred $$. Have you
ordered your recent edition of the Keysight ADS software, with the right
options?
There is a Google sponsored prototype chip design program. Not exactly
the newest process but you might get a 10 GHz single chip solution from it.
2. where can I find signal sources at these frequencies to check the
response?
I have made a design with a ADF5356 synthesizer chip that goes to 12
GHz, but the chip has a frequency doubler and the fundamental
suppression is a joke. A bad one.
<
https://ez.analog.com/rf/f/q-a/536893/adf5356-doubts-about-bleeding-current-programming
>
430 views, no answers, let alone from AD. :-[
There is a new design based on TI LMX2594 that goes to 15 GHz without
doubler, but I'm still fighting with the eval board software. Why can't
I just say: have 100 MHz in pristine quality and SPI, want 14 GHz from
eval board? I don't want to know each of the 120 registers personally,
at least not from the start. I have made a 4layer pcb @JLCPCB with
LMX2594 + AD/Hittite HMC541 post amplifiers. Enough power to drive high
level ring mixers. A step towards my Timepod frequency extension.
5 boards with 4 stamp sized synthesizers + 2 test structure microstrips
each did cost €4 plus postage. You can get some, but I still have to
solder the 1st one.
There is a 20 GHz version of the chip with doubler + tracking filter.
Above that, your options are few without board level design or access to
a phemt or SiGe process.
Mike, could it be that we have met on sci.electronics.design?
And, does anybody out there have a working W&G SNA-20 to -33 spectrum
analyzer, or the disk contents?
cheers, Gerhard
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