BECEN 10W SMA Attenuator,30db,DC to 3GHz,50 Ohm

Sembra ben fatto , corrisponde a quanto dichiarato come attenuazione, swr, resistenza. Lo utilizzo con un uBitx che non eroga piu di 10 watt, ma quando è bruciato ero sui 20mt, dove non eroga più di 6 watt, dopo pochi minuti si è interrotto presentando una resistenza infinita.

I use these up to 6GHz and 4 Watts. They are well within 1dB of expected value and never get even warm.

I tested these on a VNA to 9GHz and the attenuation (S21) is flat at 30dB until about 6 GHz! S11 and S22 are also below 20dB over that range as well. See attached screenshot. I did not test the power rating. Great value for the money.

The specs say VSWR ≤ 1.2 and ±1dB. That is true up to around 1GHz, but seems to go out of spec above that. I measured up to the 1.5GHz limit of my nanoVNA with one sample roughly every 1MHz. Between 1GHz and 1.5GHz the SWR maxes at 1.4 and the Insertion Loss goes up to -25dB. Maybe it should get less stars, but I didn’t foresee using this above 900MHz anyway and it’s possible my nanoVNA is the device not performing well at the high frequencies. It’s a good value for the price. Just be sure to measure it yourself before using it above 1GHz.