GPS antenna kuita
Isu tinoziva kuti GPS locator iterminal yekumisikidza kana kufamba nekugamuchira satellite masaini.Mukuita kwekugamuchira masaini, antenna inofanirwa kushandiswa, saka isu tinodaidza antenna inogamuchira chiratidzo cheGPS antenna.GPS satellite masiginecha akakamurwa kuita L1 uye L2, ine frequencies ye1575.42MHZ uye 1228MHZ zvakateerana, pakati payo L1 chiratidzo chehurumende chakavhurika chine denderedzwa polarization.Simba rechiratidzo rinenge 166-DBM, inova chiratidzo chisina kusimba.Aya maitiro anoona kuti antenna akakosha anofanirwa kugadzirirwa kugashira masaini eGPS.
1. Ceramic sheet: Unhu hweceramic powder uye sintering process inobata zvakananga kushanda kwayo.Mashizha eceramic anoshandiswa pamusika anonyanya 25×25, 18×18, 15×15 uye 12×12.Iyo yakakura nzvimbo yeceramic sheet, iyo yakakura iyo dielectric inogara, iyo yakakwirira resonance frequency, uye zvirinani maitiro ekugamuchira.Zvizhinji zvezvimedu zveceramic ndezve dhizaini dhizaini, kuitira kuti ive nechokwadi chekuti resonance munzira yeXY yakangofanana, kuitira kuti uwane mhedzisiro yekuunganidza nyeredzi.
2. Silver layer: Silver layer iri pamusoro peceramic antenna inogona kukanganisa resonant frequency yeantenna.Iyo yakakodzera frequency point yeGPS ceramic chip inowira chaizvo pa1575.42MHz, asi frequency point yeantenna inokanganisika zviri nyore nenharaunda yakatenderedza, kunyanya kana yakaunganidzwa mumushini wese, frequency point inofanirwa kugadziridzwa kuti irambe iripo. 1575.42MHz nekugadzirisa chimiro chesirivheri pamusoro pekuvhara..Naizvozvo, vagadziri vemichina yakazara yeGPS vanofanirwa kushandirapamwe nevagadziri veantenna pavanenge vachitenga antenna uye nekupa yakazara muchina masampuli ekuedzwa.
3. Feed point: Iyo ceramic antenna inounganidza resonance siginecha kuburikidza nenzvimbo yekudyisa uye inoitumira kumucheto kumashure.Nekuda kweiyo impedance yekufananidza yeantenna, iyo yekudyisa poindi kazhinji haisi pakati peiyo antenna, asi yakagadziridzwa zvishoma munzira yeXY.Yakadaro impedance yekufananidza nzira iri nyore uye haina kuwedzera mutengo.Kufamba muakisi imwe chete kunodaidzwa kuti single-bias antenna, uye kufamba mumatemo ose kunonzi kaviri-bias.
4. Inosimudzira dunhu: chimiro uye nzvimbo yePCB inotakura ceramic antenna.Nekuda kwehunhu hweGPS rebound, kana kumashure kuri 7cm × 7cm GPS antenna ine mana akakosha paramita: kuwana (Gain), kumira wave (VSWR), ruzha nhamba (Noise nhamba), axial ratio (Axial ratio).Pakati pavo, iyo axial ratio inonyanya kusimbiswa, inova chiratidzo chakakosha chekuyera mutsauko wekuwana chiratidzo chemuchina wese munzira dzakasiyana.Sezvo ma satellite akagoverwa zvisina tsarukano mudenga rehemispherical, zvakakosha kuve nechokwadi chekuti ma antenna ane kunzwisiswa kwakafanana mumativi ese.Axial ratio inobatwa nekuita kweantenna, chimiro chechimiro, yemukati wedunhu uye EMI yemuchina wese.
Nguva yekutumira: Oct-20-2022
