Yintoni i-Antenna ye-Dipole egcwele i-Wave?
I-antenna ye-dipole egcwele amaza yi-antenna ye-dipole ethe tyaba enobude bomqhubi obupheleleyo obulingana nobude bomsinga omnye kwi-frequency yokusebenza. Ngamanye amazwi, ukuba ubude bomsinga bumelwe yi-λ, ubude bomsinga bubonke be-dipole bumalunga ne-λ.
Xa kuthelekiswa ne-half-wave dipole, i-full-wave dipole inokusasazwa kwamandla ombane kunye ne-voltage okuntsonkothileyo ecaleni komqhubi. Lo mahluko uchaphazela ngokuthe ngqo i-input impedance yayo, ipatheni yemitha, kunye nokusebenza okusebenzayo.
Ukusasazwa kwangoku kunye neVoltage
Kwi-dipole yamaza apheleleyo, umqhubi angathathwa njengamacandelo amabini angama-half-wave length adityaniswe kunye. Kwi-antenna, usasazo lwangoku lutshintsha isigaba, nto leyo ethetha ukuba iindawo ezahlukeneyo zomqhubi zinokuthwala imisinga kwicala elahlukileyo ngephanyazo elinye.
Ngenxa yolu lwalamano lwesigaba, amasimi e-electromagnetic akhutshwa ngamacandelo ahlukeneyo e-antenna anokuqinisana kwicala elithile ngelixa erhoxisana kancinci kwelinye icala. Esi sesinye sezizathu eziphambili zokuba indlela esebenza ngayo imitha ye-dipole egcweleyo yahlukile kweye-dipole enesiqingatha se-wave.
Iimpawu zeMisebe yeDipole epheleleyo yeWave
I-dipole egcwele amaza ayivelisi nje kuphela ipateni yemitha efanayo ne-dipole enesiqingatha samaza. Kwi-dipole enesiqingatha samaza, imitha idla ngokuba namandla kwicala elibanzi. Nangona kunjalo, kwi-dipole egcwele amaza, ukurhoxiswa kwesigaba kunokunciphisa imitha kwiindlela ezithile kwaye kubangele ukuba ipateni yemitha yahlulwe ibe zii-lobes ezininzi.
Oku kuthetha ukuba i-dipole egcwele amaza ingakhupha amandla e-electromagnetic, kodwa ipatheni yayo yemitha idla ngokuba lula kwaye ayilungelanga kakhulu kwizicelo ezininzi ze-antenna ezisebenzayo. Ukongeza, i-feed point impedance ye-dipole egcwele amaza ephakathi inokuba phezulu, nto leyo eyenza ukuba kube nzima ngakumbi ukudibanisa i-impedance.
Kutheni iiDipoles ezipheleleyo zeWave zingasetyenziswa ngokuqhelekileyo?
Nangona i-full-wave dipole iluncedo ekuqondeni ukusasazwa kwangoku kwe-antenna kunye nokuziphatha kwemitha, ayisetyenziswa rhoqo njenge-antenna eqhelekileyo esebenzayo. Kukho izizathu ezahlukeneyo zoku.
Okokuqala, ipateni yayo yemitha iyinkimbinkimbi ngakumbi kuneye-dipole yesiqingatha samaza. Kwiizicelo ezifuna ipateni yemitha eqikelelweyo nelula, i-dipole yesiqingatha samaza idla ngokuba lula ukuyila nokusebenzisa.
Okwesibini, i-input impedance ye-full-wave dipole inokuba nzima ukuyifanisa nee-common transmission lines. Ukuhambelana okungalunganga kwe-impedance kunokukhokelela ekukhanyeni okwandisiweyo, ukuhanjiswa kwamandla okunciphileyo, kunye nokusebenza kakuhle kwenkqubo.
Okwesithathu, imitha evela kwiindawo ezahlukeneyo ze-antenna inokurhoxisa kancinci kwezinye iindlela. Oku kwenza i-antenna ingasebenzi kakuhle xa kufuneka ulwalathiso oluqinileyo noluzinzileyo lwemitha ephambili.
Ukubaluleka koBunjineli
Ngokwembono yobunjineli, i-full-wave dipole ibaluleke ngakumbi njengemodeli yethiyori kune-antenna esetyenziswa kakhulu. Inceda iinjineli ziqonde indlela ubude be-antenna, isigaba sangoku, indawo yokutya, kunye nokusasazwa kwentsimi ye-electromagnetic okuchaphazela ngayo ukusebenza kwemitha.
Kwiinkqubo ze-RF zokwenyani kunye ne-microwave, ukukhethwa kwe-antenna kudla ngokuxhomekeka kuluhlu lwee-frequency ezifunekayo, i-gain, i-polarization, i-impedance matching, i-radiation pattern, kunye neemeko zokufakela. Kwiinkqubo ezininzi zokulinganisa i-high-frequency kunye nonxibelelwano, ii-antenna ze-horn, ii-antenna ze-waveguide, kunye nezinye izakhiwo ze-antenna ezikhethekileyo zihlala zikhethwa kuba zibonelela ngokusebenza okuzinzileyo nokulawulekayo.
Isiphelo
I-dipole egcwele amaza yi-antenna ye-dipole enobude bomqhubi obumalunga nobude bomsinga omnye. Ngenxa yokuguqulwa kwesigaba sombane ecaleni komqhubi, indlela esebenza ngayo imitha iyinkimbinkimbi kuneye-dipole yesiqingatha samaza. Nangona inokukhupha amandla e-electromagnetic, ipateni yayo yemitha kunye neempawu ze-impedance zenza ukuba ingasetyenziswa rhoqo kwiinkqubo ze-antenna ezisebenzayo.
Ukuqonda i-full-wave dipole kusabalulekile kwithiyori ye-antenna, kuba kubonisa indlela ubude be-wavelength, usasazo lwangoku, kunye nobudlelwane besigaba obuchaphazela ngayo imitha ye-antenna. Olu lwazi luluncedo kwiinjineli ze-RF, abayili be-antenna, kunye nabaphuhlisi beenkqubo ze-microwave xa behlalutya izakhiwo ze-antenna eziphambili.
Ukuze ufunde okungakumbi ngee-antenna, nceda undwendwele:
Ixesha leposi: Juni-18-2026
