Great and very informativd video ! I wonder if you can make a video radars in the range 20 to 60 Ghz along with patch antennas and what are the Ics and the technique involved behind . Thanks in advance.
I'm not sure about the lamda by 4 situation, but the purpose of having a tvs diode is for esd suppression, which has to be done at the source where human contact is possible which is at the antenna connector. Unless we want to use it as a traditional tvs diode to prevent voltage spikes caused due to pulsating gates on digital circuitry.
If you're working at a narrow frequency range, then the 1/4 wavelength stub can be shorted to ground. The round-trip will be 1/2 wavelength, so it will appear as an open at the transmission line at RF, and yet be grounded at DC. (Been a few years, so anybody feel free to correct me if I got this wrong.)
Great Video ! TVS Diodes with femto-farads of capacitance is really cool but need to factor in the pad/mounting capacitance that can add pico-farads to the RF line (incorporate these parasitics into the Z-matching circuits)
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Another fantastic video!
Thank You so much^^
Have a Nice Weekend!
Thats very helpfull!
I now understand why my Return Loss value deviates when I use alternative TVS diodes with higher capacitance,
Great and very informativd video ! I wonder if you can make a video radars in the range 20 to 60 Ghz along with patch antennas and what are the Ics and the technique involved behind .
Thanks in advance.
insightful 👍
Can we place the TVS Diode directly on RF trace or do we need to use lambda by 4 stub between rf trace and TVS Diode?
I'm not sure about the lamda by 4 situation, but the purpose of having a tvs diode is for esd suppression, which has to be done at the source where human contact is possible which is at the antenna connector. Unless we want to use it as a traditional tvs diode to prevent voltage spikes caused due to pulsating gates on digital circuitry.
If you're working at a narrow frequency range, then the 1/4 wavelength stub can be shorted to ground. The round-trip will be 1/2 wavelength, so it will appear as an open at the transmission line at RF, and yet be grounded at DC. (Been a few years, so anybody feel free to correct me if I got this wrong.)
Yes, this is commonly done - especially in mm wave systems where junction capacitance of any directly connected TVS is intolerable.
Great Video ! TVS Diodes with femto-farads of capacitance is really cool but need to factor in the pad/mounting capacitance that can add pico-farads to the RF line (incorporate these parasitics into the Z-matching circuits)
I was thinking the same. Probably, the fringe effect between pads are in the same order of magnitude of the junction capacitance.