Electronics > RF, Microwave, Ham Radio

Experimenting with waveguides using the LiteVNA

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joeqsmith:
Some time back I had read George C. Southworth's  Forty Years of Radio Research, published in 1962.   This book covers the history of waveguides.  I've often thought about experimenting with rectangular waveguides at home but the lack of a need and high costs of even used parts deterred me.   Outside of putting together a circular waveguide antenna from pork & bean cans, I haven't progressed.   

With the LiteVNA now having supporting a harmonic mode above 9GHz, I am once again thinking about it.   Many common sizes available far exceed the frequency range of the LiteVNA.   This company offers various surplus parts.
https://www.surplussales.com/index/RF-Waveguides.html

Link of waveguide dimensions.
https://www.everythingrf.com/tech-resources/waveguides-sizes

With ham bands providing  5.65–5.925 GHz, 10.0–10.5 GHz & 24.0–24.25 GHz, I tried some searches to see if anyone was playing around with it but didn't really find much out there.   

http://www.ham-radio.com/sbms/presentations/Walt_Clark/DROplexer.pdf

I'm curious if any members here are experimenting with them?

Mechatrommer:
good luck digging the wormhole, we will follow where it suits... waveguide practicality only in tens of GHz domain and up, below that you can do in pcb (from what i read) but there is a DIY SA using sort of wave guide/chamber/tank at 1GHz region so you may want to look it up its Scotty's SA i think https://scottyspectrumanalyzer.us/ edit: yup it is cavity filter... https://scottyspectrumanalyzer.us/cavity.html

rf-messkopf:
Tobias Plüss from Switzerland has built some pretty impressive waveguide devices, such as a bandpass filter, a directional coupler, and a termination. Also a cavity filter. For such projects you not only need the requisite test equipment, but also a well equipped machine shop, plus the required machining skills.

joeqsmith:
http://www.w1ghz.org/QEX/Rectangular_Waveguide_to_Coax_Transition_Design.pdf

http://www.bobatkins.com/radio/10GHz_diode_detector_mixer.html

coppercone2:
I saw that waveguide mixer on some old webpage to link a shed to a house with a 10GHz RF link IIRC

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