ANT0104 Ultra Broadband Omnidirectional Antenna

Kubipimo bifatika bya antenna yubuyobozi bwa coefficient D, turabisobanura duhereye ku gipimo cyimirasire ya antenna.

Directivity D ni igipimo cyinshi cyumuriro mwinshi P (θ, φ) Max hamwe nigiciro cyacyo P (θ, φ) av kumurongo mubice byakarere ka kure, kandi ni igipimo kitagira urugero kirenze cyangwa kingana na 1 .Imibare yo kubara niyi ikurikira:

Mubyongeyeho, diregiteri D irashobora kubarwa nuburyo bukurikira:

D = 4 PI / Ω _A

Mubimenyerezo, kubara logarithmic ya D ikoreshwa kenshi mugushushanya inyungu zerekeza kuri antene:

D = 10 log ⁡ d

Ubuyobozi bwavuzwe haruguru D bushobora gusobanurwa nkikigereranyo cyurwego (4π rad²) antenna yumurongo ω _A. Kurugero, niba antenne irasa gusa hejuru yumwanya wo hejuru kandi urumuri rwayo ni ω _A = 2π rad², noneho icyerekezo cyacyo ni:

Niba logarithm yimpande zombi zingero zavuzwe haruguru ifashwe, inyungu ya antenne yerekeza kuri isotropy irashobora kuboneka. Twabibutsa ko iyi nyungu ishobora kwerekana gusa imishwarara ya antenne yerekana icyerekezo, mubice bya dBi, kubera ko uburyo bwo kohereza butafatwa nkinyungu nziza. Ibisubizo byo kubara ni ibi bikurikira:

Icyiciro 3.01 :: dBi d = 10 log material ibikoresho

Antenna yunguka ibice ni dBi na dBd, aho:

DBi: ninyungu yabonetse kumirasire ya antenne ugereranije ninkomoko, kuko isoko yinkomoko ifite ω _A = 4π kandi inyungu yicyerekezo ni 0dB;

DBd: ninyungu yimirasire ya antenne ugereranije na kimwe cya kabiri cya dipole antole;

Inzira yo guhindura hagati ya dBi na dBd ni:

Icyiciro 2.15 :: dBi 0 ibikoresho bya DBD