10GHz Microwave Source - project update 2
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- Опубліковано 10 січ 2022
- Updates on the 10GHz Microwave Source project.
The sampler is working great, the frequency trippler has moderate performance.
Now we need to design the 3.333GHz VCO, the PLL phase-detector and the reference oscillator.
See the explanation how the sampler works:
• Microwave Diode Sample...
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/ allelectronics - Наука та технологія
Hi guys! The full schematic I posted on Patreon patreon.com/allelectronics
And here I was thinking I had to pay for 4 layer impedance control PCBs to do RF. This guy does it with toner transfer! Love this channel ❤️
Hahahahahaha thanks man!!
10% supplies, 90% skills!
Gregory , you are killing me by your very high level of professionality on all aspect of EE although you are not in this profession as you said to me earlier ... I just wonder why could not you work for RF telecom production companies with all these skills ?? ... For me , an engineering certificate is meaningless after watching you ...
Thank you, my friend! Maybe you are right, I need to think about. You were one of the first subscribers, thank you again!
When I did my translation loops, I went on ebay to buy a piece of "for parts, not working" network or spectrum analyzer or uwave synthesizer for the sampler. I never thought of one could actually made one at home. I will try that following your approach. Joining your Patreon.
Nice work Greg..glad I found your channel !
Welcome!
fantastic project. great designs....can you show how you make the PCBs? at 10GHz the fabrication tolerance can become problematic
Thanks! I'm using the old toner transfer method, it works great, for me is the best method
Why this gold content, dont be popular. That sad. Nice material bro
Thank you man! Help me spread it 😁😁
Bravo Maestro
Hahahah !!
Fantastic
Looking forward to see the measured results at 10 GHz
😎😎😎
Beatuiful.
How do you design your microstrip filters? I like to use QUCS however it can be a bit tricky at times since it can't show you how the design is supposed to look.
It is coming together nicely.
The VNA is really beatiful, the 7 segment LED displays are an interesting contrast to the green CRT.
I designed only calculating the length for the dielectric constant, with a bit of experience it works first time!
how to make that Pcb BPF ?
Hello Gregory! Very good lessons about frequency! Thank you for sharing so much information. I'm trying to build a frequency divider that could be used to measure a GHz signal with a 100MHz osciloscope. I've been tinkering with some circuits using decade counters, flip-flops, but they all fail to bring a GHz signal down because they are mostly intented for 1MHz to 60MHz frequencies. Do you know what is the best way to achieve this?
Hi Cesar, frequency dividers for GHz frequencies are called prescalers, make a search on google.
hi can you use a highly stable reconfigurable YIG generator. or satellite converter on a SAW resonator
I would like to have YIGs on the lab.
ıts good work
Thanks! Welcome to the channel
Cool video! How does all this rf woodoo doesn't interfere with each other at such high frequencies?
Hahahaha it may interfere a bit.. you need position the things with care to reduce. In this case the balanced design helps a lot to cancel some leakages
Gregory el analizador vectorial analogico HP que ternes esta muy bueno!!!
lo has comparado con los nano VNA?
Vi tu video una vez mas porque estoy intentandp diseñar una etapa dce osciloscopio con barrido equivalente, basado en tu sampler.
Gracias una vez mas
Thanks amigo!
HI! this is a beautiful project. I would be interested in reproducing the sampler to lock my HP 86290C. Do you think that as it is it can work decently up to 6GHz? I would like to have a diagram, or at least the abbreviation of the balun you used. Thank you so much for your kindness!
Yes, absolutely think would be possible. I'm traveling and don't have access to the diagram right now. The balun man, is probably a network balun, I bought from surplus. So.. Conclusions is: try it, iterate.. Don't lose much time thinking about parts, you will also learn a lot on the process. Greg.
i saw spanish books in your lab, have you a channel in spanish too?
What advice do you give when looking to setup a lab with HP RF equipment.
I'm almot always using two signal generators and 1 spectrum analyzer. Two power supplies at least. And take a look at the noise generated by LED lights, sometimes I need to turn off my LED panels to make measurements.
Nice, How did you test the directional coupler and bandpass filters with your VNA when its only going upto 1.3 GHz ?
No need for test!
@@AllElectronicsChannel Is there a way to test them, bcoz i only have a nanovna and tinysa. I think you have built a rf power meter too !
The proper way would be using a 10ghz VNA.. nevertheless is difficult to test this is circuit, because you need to place conectors and test prints that would change the behavior of the circuit
@@AllElectronicsChannel Since you are using FR4 susbstrate, are thinner ones 0.4, 0.8 mm better(less lossy) than 1.5mm at higher frequencies ?
I never tested, do you have some info?
Can we use glass fiber for rf pcb designs how much is its dielectric constant I wanna design a coplanar pcb transmission line with glass fiber boards and I don't know how much is its dielectric constant....
This is FR4. I usually use 4.3
@@AllElectronicsChannel thanks.
Hi, nice project ! How available is the SRD used for the sampler ? I thought these were basically unobtainable...
It's indeed pretty difficult, I got on aliexpress from China
@@AllElectronicsChannel Thanks you for your answer. I never thought of Aliexpress for this! Don't you fear receiving counterfeit components ? Do you have a seller to recommend?
I don't have a specific seller. Actually I remember the seller of the SRD, is TILICHIP.
Some sellers send fake parts, so I aways buy from more than one. PIN diodes where always good, the SRD also.
BAT15-099 Bridge I got good, I think there is only one seller of them in aliexpress.
One that is difficult is BAT15-03W, I have bought 2 or 3 times from different sellers and always got fake parts
@@AllElectronicsChannel I think mouser actually sells BAT15-03W. Free shipping in EU for orders over 50eur.
@@AllElectronicsChannel actually Mouser also has MA144769-287T SRDs in stock! I think I'll do an order, I want to try doing a comb generator to test my HP 141t and see if I can reach it's whole 18GHz bandwidth.
What books do you recommend in English about RF and microwave?
Hi! I don't know a lot of book, one about RF I read is RF Circuit Design from Bowick
@@AllElectronicsChannel thanks for your answer.
It would be great with your knowledge and popularization skills if you write some books on rf
Nice work!
The tripler looks like it uses BFP620 transistors.
What sampling diodes are you using? Are they a pair of BAT15?
It is impressive how much performance you have from designs that look so simple, on FR-4! Like the Tektronix S-4 and S-6 from the late 1960s and early 1970s!
Thanks!! Yep, they are BFP620! The bridge is a HSMS 8202, the full schematics I posted on Patreon
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I'm loving doing design like this and with the support of you guys. I'm studying a lot of designs like you said, S-4, S-6.. Le'ts bring this old art to live again! For me this channel and your support is a dream coming true, thank you so much
How to work with such a high frequencies? 1 pF capacitor has impedance 15 Ohm, 2.5nH inductor (1mm length of 1mm diameter wire) has impedance 18 Ohm... Any millimeter of wire can leads to parasitic oscillation in an amplifier.... I made only FM transmitter 100MHz, and 5mm of wire increase SWR. But what we will have in 10GHz? Any micrometer influences on SWR in a cable?
Gregory you must show the phase noise plots...
I need to assemble all modules correctly to make final measurements.
Hi!. Could You make it publicly available or is it possible to buy a circuit diagram from you to make it yourself a 10 GHz TX and RX with Frequency Modulated Continuous Wave? I am from Ukraine, we would really need such transmitters to protect peaceful cities from drones. Thank you!
Hi Roman, send me a mail !