Bandwit bụ paramita antenna ọzọ dị mkpa. Bandwit na-akọwa oke ugboro ugboro nke antenna nwere ike ịgbapụta ma ọ bụ nweta ume nke ọma. Dịka, bandwit achọrọ bụ otu n'ime paramita ejiri họrọ ụdị antenna. Dịka ọmụmaatụ, enwere ọtụtụ ụdị antennas nwere obere bandwidid. Enweghị ike iji antennas ndị a na ngwa brọdband.
A na-ehotakarị bandwit n'usoro nke oke voltaji ebili mmiri (VSWR). Dịka ọmụmaatụ, enwere ike ịkọwa antenna dị ka ịnwe VSWR <1.5 karịa 100-400 MHz. Nkwupụta a na-ekwu na ọnụọgụ ntụgharị erughị 0.2 n'ofe ọnụọgụ ọnụọgụgụ. Ya mere, nke ike a na-enye na antenna, naanị 4% nke ike na-egosipụta azụ na onye na-ebufe ya. Na mgbakwunye, nloghachi ọnwụ S11 = 20 * LOG10 (0.2) = 13.98 decibels.
Biko mara na nke a dị n'elu apụtaghị na 96% nke ike na-ebuga na antenna n'ụdị radieshon electromagnetic gbasaa. A ghaghị ịtụle ọnwụ ike.
Ọzọkwa, ụkpụrụ radieshon ga-adịgasị iche na ugboro ole. N'ozuzu, ọdịdị nke usoro radieshon adịghị agbanwe ugboro ugboro.
Enwere ike ịnwe ụkpụrụ ndị ọzọ ejiri kọwaa bandwit. Nke a nwere ike ịbụ polarizing n'ime ebe ụfọdụ. Dịka ọmụmaatụ, enwere ike ịkọwa antenna gbara okirikiri dị ka inwe oke axial nke <3 dB site na 1.4-1.6 GHz (ihe na-erughị 3 dB). Oke ntọala bandwit polarization a bụ ihe dị ka maka antennas nwere okirikiri.
A na-akọwakarị bandwit na bandwit Fractional ya (FBW). FBW bụ oke nke oke ọnụọgụ nke kewara site na etiti etiti (ụzụ kacha elu na-ewekarị obere oge). "Q" nke antenna na-emetụtakwa bandwit (Q dị elu pụtara bandwit dị ala na nke ọzọ).
Iji nye ụfọdụ atụ ihe atụ nke bandwit, ebe a bụ tebụl bandwidth maka ụdị antenna nkịtị. Nke a ga-aza ajụjụ ndị a, "Gịnị bụ bandwit nke antenna dipole?" na "Olee antenna nwere bandwit dị elu - patch ma ọ bụ antenna helix?". Maka ntụnyere, anyị nwere antennas nwere oge etiti nke 1 GHz (gigahertz) nke ọ bụla.
Bandwidth nke ọtụtụ antennas nkịtị.
Dị ka ị na-ahụ na tebụl, bandwit nke antenna nwere ike ịdị iche iche. Antenna patch (microstrip) dị obere bandwit, ebe antenna helical nwere nnukwu bandwidth.
Oge nzipu: Nov-24-2023
