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This item: DHT Electronics RF coaxial connector adapter SMA male coaxial Termination Loads 1W DC- 3.0GHz 50 ohm Pack of 2
$5.50$5.50($2.75/Count)
Get it as soon as Friday, Aug 9
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Needed these to terminate the built in receiver signal so I can use an external FPV module and antenna. I use one for the goggles and then another on the 5.8G FPV Antenna Triple Feed Patch High Accuracy Antenna 9.4dBi SMA Male to SMA Male Cable Adapter Directional Circularly Polarized Antenna. Yes, the open source antenna designed by Maarten Baert and Robin Theunis.
Remember, if your using RHCP on your drone, then you need to RHCP on your goggles, and on both antennas on the googles. That means RHCP patch antenna and a RHCP circular polarized antenna.
Do not use RHCP and LHCP on your googles at the same time, it will just cancel them out, and you won't see anything!
One of the calibrations needs to be done using two 50 ohm dummy loads and the Nano VNA I bought only included one. Also will be useful testing some of my low powered amateur gear (1 watt maximum.
I've bought 3 of these and they all have similar impedance plots, for example 50 Ω at 0 Hz 56-j2 Ω, SWR 1.13 at 600 MHz and fairly linear in between. Don't have test gear for the specified 3 GHz limit. Haven't tested their power dissipation. Nut turns smoothly.
After calibrating my nano using these 50ohm loads my swr readings were off. Everything was higher than it should be. After getting out my ohm meter and finding that they were 51ohms it made sense. If what your using them for does not require exactly 50ohms then you should be fine. But to calibrate a precision device like a vector network analyzer these 50ohm loads will not be the right choice for you.