Qhov siab tshaj plaws ERP yog dab tsi?
Qhov siab tshaj plaws ERP yog dab tsi?

Video: Qhov siab tshaj plaws ERP yog dab tsi?

Video: Qhov siab tshaj plaws ERP yog dab tsi?
Video: Nkauj Hmoob Sông Mã txawj seev cev zoo heev 2022 2024, Kaum ib hlis
Anonim

Qhov siab tshaj plaws ERP . Cov Qhov siab tshaj plaws ERP cuab tam tso cai rau koj mus xam cov siab kawg muaj zog hluav taws xob zoo, hauv watts, yuav tsum tau siv rau ntawm qhov chaw tshwj xeeb, raws li FCC Txoj Cai 90.205 rau Lub Hwj Chim thiab kav hlau txais xov qhov siab txwv.

Ntawm no, qhov txawv ntawm ERP thiab EIRP yog dab tsi?

ERP Qhov Zoo Radiated Fais Fab yog tag nrho lub zog hluav taws xob los ntawm tus kav hlau txais xov tiag tiag txheeb ze rau ib nrab-yoj dipole es tsis yog lub kav hlau txais xov isotropic theoretical. Ib nrab-yoj dipole muaj qhov nce ntawm 2.15 dB piv rau tus kav hlau txais xov isotropic. Kev sib raug zoo nruab nrab ntawm EIRP thiab ERP tuaj yeem pom hauv kev sib npaug hauv qab no: Upvote.

Tsis tas li, koj yuav xam ERP li cas? Rau xam ERP , Siv lub transmitter fais fab tso zis, rho tawm qhov poob los ntawm duplexers, rho tawm ib qho kev ntsuas qhov poob qis thiab ntxiv cov kav hlau txais xov nce. Piv txwv: (2 dBd ua ke duplexer thiab feedline poob) + (5 dBd kav hlau txais xov nce) = 3 dBd nce. Siv cov kav hlau txais xov nce hauv dBd tsis yog dBi.

Kuj Paub, EIRP txwv yog dab tsi?

Piv txwv li yog tias koj lub cev tswj hwm (FCC hauv Asmeskas, IC hauv Canada) tau teeb tsa qhov siab tshaj plaws EIRP (sib npaug isotropically radiated hwj chim) rau ib tug point-to-multipoint (PtMP) system rau 36 dBm nyob rau hauv lub 2.4 GHz band, koj tx zog ntxiv rau kav hlau txais xov nce yuav tsum tsawg dua los yog sib npaug rau 36 dBm.

EIRP suav li cas?

Piv txwv li, piv txwv li lub zog hluav taws xob yog ntsuas rau lub kav hlau txais xov arbitrary. Piv txwv tias lub zog siab tshaj plaws yog ntsuas ntawm = = 90 degrees, thiab tus nqi yog EIRP = 20 dBm = -10 dB = [0.1 W = 100 mW].

Pom zoo: