Li-antenna tsa terata ke e 'ngoe ea mefuta ea mantlha ea li-antenna. Li tsebahala haholo ebile li sebelisoa haholo. Ho utloisisa li-antenna tsa terata hamolemo, a re qaleng ka ho sheba mohala oa phetiso.
Mohala oa Phetisetso
Mohala oa phetiso, kapa terata, o jara matla a motlakase ho tloha pheletsong e 'ngoe ho ea ho e 'ngoe. Haeba lipheletso ka bobeli tsa mohala oa phetiso li hokahantsoe le lipotoloho, tlhahisoleseling e ka fetisetsoa kapa ea amoheloa lipakeng tsa lipotoloho tse peli ka terata ena.
Haeba pheletso e 'ngoe ea terata e siiloe e butsoe, matla a motlakase a tla leka ho tsoa. Sena se lebisa puisanong ea waelese. Haeba pheletso ea terata e kobehile, matla a tla tsoa moleng oa phetisetso ka katleho ho feta pele. Ho tsoa hona ka morero ho bitsoa mahlaseli.
Ho fihlella mahlaseli a sebetsang hantle, impedance e pheletsong e bulehileng ea mohala oa phetiso e hloka ho bapisoa le impedance ea sebaka se lokolohileng. Nahana ka mohala oa phetiso o bolelele ba kotara ea bolelele ba leqhubu. Karolo ea oona e hole e siiloe e butsoe ebile e kobehile, ka hona e hlahisa impedance e phahameng. Sebopeho sena se etsa antenna ea dipole ea halofo ea leqhubu. Leha pheletso ea phepelo ea mohala oa phetiso e na le impedance e tlase, impedance e phahameng pheletsong e bulehileng e ts'oana le impedance ea sebaka se lokolohileng, e leng se fellang ka ts'ebetso e ntlafetseng ea mahlaseli.
Dipole
Ha matla a fetisoa ka terata e kobehileng joalo, pheletso ea mohala oa phetisetso e bitsoa dipole kapa antenna ea dipole.
Karabelo ea impedance ea ho kenya ke ts'ebetso ea radius le bolelele ba dipole. Ha radius e le nyane, boholo ba reactance bo ba kholoanyane, 'me reactance e lekana le bolelele ba leqhubu. Ka hona, bolelele le radius ea dipole li hloka ho nahanoa. Ka tloaelo, impedance ea antenna ea dipole e ka ba 72 Ω.
Setšoantšo se ka tlase se thusa ho hlalosa mohopolo ona ka ho hlaka haholoanyane.
Setšoantšo se bontša setšoantšo sa potoloho sa dipole e bonolo e hokahantsoeng le mohala oa phetiso. Ka har'a antenna ea dipole, motlakase o moholo bohareng 'me o fokotseha ho ea ho lefela lipheletsong, ha motlakase o le monyenyane bohareng 'me o eketseha ho ea ho o moholo lipheletsong.
Mefuta e tloaelehileng ea li-antenna tsa terata e kenyelletsa: antenna ea dipole ea half-wave, antenna ea dipole e nang le half-wave e phuthiloeng, antenna ea dipole ea full-wave, antenna e khutšoanyane ea dipole, le antenna ea dipole e sa feleng. Mefuta ena eohle ea li-antenna e tla tšohloa likhaolong tse latelang.
Ho ithuta haholoanyane ka li-antenna, ka kopo etela:
Nako ea poso: Mots'eanong-29-2026
