Bandwidth imwe parameter huru yeantenna. Bandwidth inotsanangura huwandu hwemafrequencies ayo antenna inogona kuburitsa kana kugamuchira simba nemazvo. Kazhinji, bandwidth inodiwa ndeimwe yeparameters inoshandiswa kusarudza rudzi rweantenna. Semuenzaniso, kune mhando dzakawanda dzeantenna dzine bandwidth diki kwazvo. Aya antenna haagone kushandiswa mumaapplication ebroadband.
Bandwidth inowanzo taurwa maererano ne voltage standing wave ratio (VSWR). Semuenzaniso, antenna inogona kutsanangurwa seine VSWR <1.5 pamusoro pe100-400 MHz. Chirevo ichi chinotaura kuti reflection coefficient iri pasi pe0.2 mu quoted frequency range. Saka, pamagetsi anoendeswa ku antenna, 4% chete yesimba ndiyo inodzoserwa ku transmitter. Pamusoro pezvo, return loss S11 =20* LOG10 (0.2) = 13.98 decibels.
Ndapota cherechedzai kuti zviri pamusoro apa hazvirevi kuti 96% yesimba rinoendeswa kuantenna muchimiro chemwaranzi yemagetsi inoparadzirwa. Kurasikirwa kwesimba kunofanira kufungwa nezvako.
Pamusoro pezvo, maitiro emwaranzi anosiyana zvichienderana nekufamba kwenguva. Kazhinji, chimiro chemaitiro emwaranzi hachichinji zvakanyanya mafambiro acho.
Panogonawo kunge paine mimwe mitemo inoshandiswa kutsanangura bandwidth. Izvi zvinogona kunge zvichibatanidza denderedzwa. Semuenzaniso, antenna yakatenderera inogona kutsanangurwa seine chiyero che axial che <3 dB kubva pa1.4-1.6 GHz (pasi pe3 dB). Iyi polarization bandwidth setting range inenge iri ye antenna dzakatenderera.
Bandwidth inowanzo tsanangurwa muFractional Bandwidth yayo (FBW). FBW chiyero chehuwandu hwema frequency hwakakamurwa ne centre frequency (highest frequency minus lowest frequency). "Q" ye antenna ine chekuitawo ne bandwidth (higher Q zvinoreva bandwidth yakaderera uye vice versa).
Kuti tipe mienzaniso chaiyo yebandwidth, heino tafura yemabandwidth emhando dzeantenna dzakajairika. Izvi zvichapindura mibvunzo inoti, "Chii chinonzi bandwidth ye antenna ye dipole?" uye "Ndeipi antenna ine bandwidth yakakwira - patch kana antenna ye helix?". Kuti tienzanise, tine antenna dzine frequency yepakati ye1 GHz (gigahertz) imwe neimwe.
Mabhendi emaantenna akawanda akajairika.
Sezvamunoona kubva patafura, bandwidth yeantenna inogona kusiyana zvikuru. Ma antenna epatch (microstrip) ane bandwidth yakaderera zvikuru, nepo ma antenna e helical ane bandwidth yakakura kwazvo.
Nguva yekutumira: Mbudzi-24-2023
