MaAntenna anotumira kana kugamuchira ruzivo kuburikidza nekuburitsa simba remagetsi. Saka, simba nesimba ndizvo zvinhu zvikuru zvine chekuita nemafungu aya emagetsi, uye zvakakosha kuti tikurukure nezvazvo. Mafungu emagetsi ane simba remagetsi uye simba remagetsi.
Chero nguva, mafungu anogona kutsanangurwa nemavector maviri aya. Mufananidzo uri pazasi unoratidza zvikamu zvemagetsi nemagnetic field zvemafungu emagetsi.
Mumafungu emagetsi, simba remagetsi rinomira rakatarisa divi rekupararira, uye simba remagetsi rinomirawo rakatarisa divi rekupararira, nepo simba remagetsi neremagetsi rakatarisa divi rekupararira.
Vekitori yePoynting
Vektori yePoynting inotsanangura simba remafungu emagetsi panguva imwe neimwe yeyuniti panguva imwe neimwe. Yakatanga kuwanikwa naJohn Henry Poynting muna 1884 uye yakatumidzwa zita rake.
Tsanangudzo: Vektori yePoynting inopa mwero wekufambisa simba pachikamu chimwe nechimwe.
Neimwe nzira: Simba rinotakurwa nemafungu panguva yeyuniti payuniti imwe neimwe rinopiwa nePoynting vector.
Vektori yePoynting inoratidzwa neS.
Chikamu
Chikamu cheSI chePoynting vector iwatts pa square meter (W/m²).
Kutsanangura Masvomhu
Vektori yePoynting instantaneous, inotsanangura simba rine chekuita newave yemagetsi, inotsanangurwa se:
kupiEndiyo vector yesimba remagetsi uyeHndiyo magnetic field intensity vector.
Kutorwa kwePoynting Vector
Kuti tinzwisise zviri nani vhekitori yePoynting, ngatitorei nzira yayo yekutsanangura nhanho nhanho.
Funga nezvemafungu emagetsi anoyambuka nzvimbo A yakatenderedza kuenda kwainobva (inotorwa se X-axis). Munguva pfupi pfupi dt, mafungu anofamba chinhambwe dx:
kupiSndiyo Poynting vector. Equation iri pamusoro apa inopa simba panguva yeyuniti payuniti chero nguva - iyi ndiyo revo chaiyo yePoynting vector.
Kuti udzidze zvakawanda nezve antenna, ndapota shanyira:
Nguva yekutumira: Chivabvu-15-2026
