Bandwidth ndiyo imwe yakakosha antenna parameter.Bandwidth inotsanangura huwandu hwemafrequency ayo antenna inogona kunyatso kupenya kana kugamuchira simba.Kazhinji, bandwidth inodiwa ndeimwe yemaparamita anoshandiswa kusarudza rudzi rweantenna.Semuenzaniso, kune akawanda marudzi emaantenna ane madiki bandwidths.Aya antennas haagone kushandiswa mubroadband application.
Bandwidth inowanzo taurwa maererano nevoltage standing wave ratio (VSWR).Semuenzaniso, antenna inogona kutsanangurwa seine VSWR <1.5 pamusoro pe100-400 MHz.Chirevo chinoti iyo yekuratidzira coefficient isingasviki 0.2 kuyambuka yakataurwa frequency renji.Naizvozvo, yesimba rinounzwa kune antenna, 4% chete yesimba inotaridzwa kumashure kune transmitter.Mukuwedzera, kudzorera kurasikirwa S11 = 20 * LOG10 (0.2) = 13.98 decibels.
Ndokumbira utarise kuti zviri pamusoro hazvireve kuti 96% yesimba inounzwa kune antenna nenzira yekupararira kwemagetsi emagetsi.Kurasikirwa kwesimba kunofanira kufungwa.
Pamusoro pezvo, iyo radiation pateni ichasiyana ne frequency.Kazhinji, chimiro cheiyo radiation maitiro hachinje zvakanyanya frequency.
Panogonawo kunge paine mamwe maitiro anoshandiswa kutsanangura bandwidth.Izvi zvinogona kuve polarizing mukati meimwe siyana.Semuenzaniso, denderedzwa polarized antenna inogona kutsanangurwa seine axial ratio ye <3 dB kubva pa1.4-1.6 GHz (pasi pe3 dB).Iyi polarization bandwidth kuseta renji ingangoita yedenderedzwa polarized antenna.
Bandwidth inowanzotsanangurwa muFractional Bandwidth yayo (FBW).FBW ndiyo chiyero cheiyo frequency renji yakakamurwa nepakati frequency (yepamusoro frequency minus yakaderera frequency).Iyo "Q" yeantenna zvakare ine chekuita nebandwidth (yepamusoro Q inoreva yakaderera bandwidth uye zvinopesana).
Kupa mimwe mienzaniso yekongiri yebandwidth, heino tafura yemabhendi emhando dzeantenna dzakajairwa.Izvi zvichapindura mibvunzo, "Chii chinonzi bandwidth ye dipole antenna?"uye "Ndeipi antenna ine yakakwirira bandwidth - chigamba kana helix antenna?".Kuenzanisa, isu tine antenna ane pakati frequency ye1 GHz (gigahertz) imwe neimwe.
Bandwidth yeakawanda antenna akajairika.
Sezvauri kuona kubva patafura, bandwidth yeantenna inogona kusiyanisa zvakanyanya.Patch (microstrip) antennas akadzika kwazvo bandwidth, nepo helical antenna ine yakakura kwazvo bandwidth.
Nguva yekutumira: Nov-24-2023
