mufananidzo 1
1. Beam kunyatsoshanda
Imwe paramende yakajairwa yekuongorora mhando yekufambisa uye kugamuchira antenna kushanda kwedanda. Kune antenna ine hombe lobe munzira ye-z-axis sezvakaratidzwa muMufananidzo 1, kushanda kwebeam (BE) kunotsanangurwa se:
Ndiyo chiyero chesimba rinofambiswa kana kugamuchirwa mukati mekona yekona θ1 kune yakazara simba rinofambiswa kana kugamuchirwa neantenna. Iyo fomula iri pamusoro inogona kunyorwa se:
Kana kona iyo yekutanga zero poindi kana kukosha kushoma inoonekwa inosarudzwa se θ1, dhizaini inoshanda inomiririra chiyero chesimba mune huru lobe kune iyo yakazara simba. Mumashandisirwo akadai seyemetrology, nyeredzi, uye radar, antenna inoda kuve nepamusoro-soro danda. Kazhinji inopfuura 90% inodiwa, uye simba rinogamuchirwa nerutivi lobe rinofanira kuva diki sezvinobvira.
2. Bandwidth
Iyo bandwidth yeantenna inotsanangurwa se "iyo frequency renji pamusoro pekuti kuita kwemamwe maitiro eiyo antenna kunosangana neakasiyana zviyero". Iyo bandwidth inogona kutariswa seye frequency renji pamativi ese epakati frequency (kazhinji ichitaura kune resonant frequency) uko hunhu hweantenna (senge yekupinza impedance, inotungamira patani, beamidth, polarization, sidelobe level, kuwana, kunongedzera danda, radiation. kunyatsoshanda) vari mukati meyero inogamuchirwa mushure mekuenzanisa kukosha kweiyo frequency frequency.
. Kune Broadband antennas, iyo bandwidth inowanzo ratidzwa sereshiyo yekumusoro uye yakaderera frequency yekushanda kunogamuchirwa. Semuenzaniso, bandwidth ye10: 1 inoreva kuti iyo yepamusoro frequency ndeye 10 nguva yakaderera frequency.
. Kune narrowband antennas, iyo bandwidth inoratidzwa sechikamu cheiyo frequency musiyano kune yepakati kukosha. Semuenzaniso, 5% bandwidth inoreva kuti inogamuchirwa frequency renji i5% yepakati frequency.
Nekuti hunhu hweiyo antenna (yekuisa impedance, inotungamira pateni, kuwana, polarization, nezvimwewo) inosiyana ne frequency, iyo bandwidth maitiro haasi akasiyana. Kazhinji shanduko mune inotungamira pateni uye yekupinza impedance dzakasiyana. Naizvozvo, iyo inotungamira pateni bandwidth uye impedance bandwidth inodiwa kusimbisa mutsauko uyu. Iyo inotungamira pateni bandwidth ine chekuita nekuwana, sidelobe nhanho, beamidth, polarization uye danda kutungamira, nepo impedance yekupinza uye kugona kwemwaranzi zvine chekuita neiyo impedance bandwidth. Bandwidth inowanzotaurwa maererano nebeamwidth, sidelobe mazinga, uye maitiro emhando.
Iyo hurukuro iri pamusoro inofungidzira kuti zviyero zvekubatanidza network (transformer, counterpoise, nezvimwewo) uye/kana antenna haishanduke chero nzira sezvo frequency inochinja. Kana zviyero zvakakomba zveantenna uye / kana network yekubatanidza inogona kunyatsogadziriswa sezvo frequency inochinja, bandwidth yenarrowband antenna inogona kuwedzerwa. Kunyangwe iri risiri basa riri nyore kazhinji, kune maapplication kwarinowanikwa. Muenzaniso unonyanya kuzivikanwa ndeyeredhiyo antenna muredhiyo yemotokari, iyo inowanzova nehurefu hunogadziriswa hunogona kushandiswa kuisa antenna kuti igamuchirwe zviri nani.
Kuti udzidze zvakawanda nezve antennas, ndapota shanya:
Nguva yekutumira: Jul-12-2024
