Kushanda zvakanaka kweantenainotsanangura kuti simba reRF rinogamuchirwa rinoshandurwa sei kuita simba rinopfuudzwa. Ndiyo parameter huru yeantenna nekuti kurasikirwa neconductor, kurasikirwa ne dielectric uye kusawirirana kwe impedance zvinogona kuderedza mwaranzi inoshandiswa kunyangwe kana antenna iine pateni yakakodzera.
Fomura yekutanga yekushanda zvakanaka kwemwaranzi ndeiyi:
Kushanda zvakanaka kwemwaranzi, erad= Prad/ Pkugamuchirwa
Kushanda zvakanaka kwese kunosanganisirawo kusawirirana pakupinza kweantenna:
Kushanda zvakanaka kwese, e0= (1 - |Γ|2) erad
uko Pradine simba rinopenya, PkugamuchirwaSimba rinogamuchirwa uye Γ ndiyo coefficient yekuratidzira kwekupinda. Gwaro iri rinotsanangura mafomula ekushanda zvakanaka kweantenna, nzira dzekurasikirwa, gain, directionactivity, realized gain uye nzira dzakajairika dzekuyera.
Kushanda zvakanaka kweAntena: Tsanangudzo uye Mafomula
Mufananidzo 1
Pfungwa yekushanda zvakanaka kweantenna inogona kutsanangurwa uchishandisa Mufananidzo 1.
Kushanda kwese kweantenna e0 kunoshandiswa kuverenga kurasikirwa kweantenna pakupinda uye mukati mechimiro cheantenna. Tichitarisa Mufananidzo 1(b), kurasikirwa uku kunogona kunge kuri nekuda kwe:
1. Kuratidzwa kwechiedza nekuda kwekusawirirana pakati petambo yekutumira neantenna;
2. Kurasikirwa kwemutyairi wemotokari ne dielectric.
Kushanda kwese kweantenna kunogona kuwanikwa kubva mufomura inotevera:
Kureva kuti, kushanda zvakanaka kwese = chibereko chekushanda zvakanaka kusina kuenzana, kushanda zvakanaka kwemutyairi uye kushanda zvakanaka kwe dielectric.
Kazhinji zvakaoma kuverenga kushanda zvakanaka kwemuchina wekufambisa magetsi (conductor) uye kushanda zvakanaka kwemuchina wekufambisa magetsi (dielectric), asi zvinogona kuonekwa nekuyedza. Zvisinei, kuyedza hakugone kusiyanisa kurasikirwa kuviri uku, saka fomura iri pamusoro inogona kunyorwa patsva seizvi:
ecd ndiyo nzira yemwaranzi inoshanda nayo uye Γ ndiyo nzira yekuratidza chiedza.
Kuwana, Kutungamira uye Kuwana Kwakawanikwa
Kutungamirainotsanangura kuti patani yemwaranzi yakabatana sei munzira yakatarwa.Kuwanainosanganisa kutungamira nekushanda zvakanaka kwemwaranzi:
G = eradD
apo G inowana, D inotungamira uye eradkushanda zvakanaka kwemwaranzi. Saka, Gain inokonzera kurasikirwa kwemuchina wemagetsi ne dielectric asi kazhinji haisanganisi kurasikirwa kwe impedance-mismatch.
Kazhinji, zvinoreva kuwedzera kwesimba, izvo zvinotsanangurwa se "chiyero chekuwedzera simba munzira yakatarwa nesimba re antenna reference munzira yereference". Simba rekupinda kune iyi antenna rinofanira kuenzana. Antenna reference inogona kuva vibrator, horn kana imwe antenna. Kazhinji, nzvimbo isina divi inoshandiswa se antenna reference. Saka:
Hukama huripo pakati pesimba rose rakasvibirwa nemagetsi ese ekuisa simba ndehwekuti:
Pfuma inowanikwainosanganisira mhedzisiro yekusawirirana kwekupinda uye ine chekuita nekuwana kuburikidza ne:
Gzvakaonekwa= (1 - |Γ|2)G
Kana antenna yakaenzana zvakanaka, kuwana kwakawanikwa kunosvika pakuwana. Kana kusawirirana kwacho kwakakosha, kuwana kwakawanikwa kwakaderera kunyangwe kana maitiro emwaranzi uye kushanda zvakanaka kwemwaranzi zvikaramba zvisina kuchinja.
Hukama huripo pakati pekuwana nekutungamira ndehwekuti:
Kana antenna yakaenzana zvakakwana netambo yekutumira, |Γ| = 0 uye kuwana kwakawanikwa kwakaenzana nekuwana. Mumasystem anoshanda, kurasikirwa kwetambo uye nzvimbo yekutarisa calibration zvinofanirwawo kutariswa pakuenzanisa kukosha kwakayerwa uye kwakaedzwa.
Zvinhu Zvikuru Zvinoderedza Kushanda KwemaAntena
- Kufambiswa kwemutyairi wepamusoro uye kuomarara kwepamusoro
- Kurasikirwa kwe dielectric mu substrates, radomes uye zvinhu zvekutsigira
- Kusawirirana kweImpedance pakudya
- Network dzinoenderana, zvinobatanidza uye zvivakwa zvekudyisa zvinorasikirwa
- Kuiswa pedyo nesimbi, zvinhu zvinonyudza kana muviri wemunhu
- Kushivirira kwekugadzira uye kugoverwa kwezvino kunoenderana nefrequency
Kubudirira kweAntenna Kunoyerwa Sei
Nzira yekuyera inoenderana nerudzi rweantenna, huwandu hwefrequency uye nzvimbo dzekuyedza dziripo. Nzira dzakajairika dzinosanganisira kuenzanisa gain-directivity, kubatanidzwa kweradiation-pattern, kuyerwa kwereverberation-chamber uye nzira yeWheeler-cap yeantenna diki dzakakodzera dzemagetsi. Kuongororwa kwakarurama, kugadziriswa kwecable-loss, polarization alignment uye reference plane yakajeka zvakakosha kuti pave nemhedzisiro ine musoro.
Kushandisa Kubudirira uye Kuwana Mukusarudza Antena
Kushanda zvakanaka, kuwana, kuwana kwakagadziriswa, bandwidth, polarization, beamwidth uye VSWR zvinofanirwa kuongororwa pamwe chete. Antena ine hutungamiriri hwepamusoro inogona kuramba ichipa kuwana kwakagadziriswa kwakaderera kana kurasikirwa kana kusawirirana kwakanyanya. Mainjiniya anofanira kuenzanisa kukosha kwebhendi rese rekushanda uye pasi pemamiriro ekumisikidza anomiririra.
Ongorora RF MISOmhinduro dze antennakana kuongorora yedukugona kwekuyedza antennaKuti musarudze mashandisirwo azvo, goverai bhendi rekushanda, kuwedzera kunodiwa, polarization, zvirambidzo zvekuisa uye nzvimbo yekuyedza nechikwata cheRF MISO.
Kuti udzidze zvakawanda nezve antenna, ndapota shanyira:
Nguva yekutumira: Chikumi-14-2024
