Isixhumi esingu-N (esaziwa nangokuthi isixhumi sohlobo lwe-N) iyisixhumi se-RF esiqinile, esimelana nesimo sezulu kanye nosayizi omaphakathi esisetshenziselwa ukuhlanganisa amakhebuli angama-coaxial.Yaqanjwa ngawo-1940 nguPaul Neill weBell Labs, manje isisetshenziswa kabanzi ngokusebenza okungaguquki ezinhlelweni eziningi eziphansi zama-microwave.