Umgomo wama-antenna wokuxhumana nezinye izesekeli,
Ungawamukela kanjani futhi uwadlulisele kanjani amasiginali we-3g/4g izikhulisamandla eziphindaphinda isiginali?
Iwebhusayithi:https://www.lintratek.com/
Okokuqala, umgomo we-antenna:
1.1 Incazelo ye-antenna:
Idivayisi ekwazi ukusakaza amaza kagesi ngendlela efanele iye endaweni ethile noma engathola ngempumelelo amagagasi kazibuthe asuka endaweni ethile emkhathini.
1.2 Imisebenzi ye-antenna:
Ø Ukuguqulwa kwamandla - ukuguqulwa kwegagasi eliqondisiwe kanye negagasi lesikhala samahhala; Imisebe yokuqondisa (ukwamukela)- inokuqondisa okuthile.
1.3 Isimiso semisebe ye-antenna:
1.4 Amapharamitha we-Antenna
Ipharamitha yokukhipha imisebe
Ø Ububanzi bebhamu yamandla esigamu, isilinganiso sangaphambili ukuya emuva;
Ø Imodi ye-polarization, ukubandlululwa kwe-polarization;
Ø Isici esiqondile, ukuzuza kwe-antenna;
Ø I-lobe eyinhloko, i-lobe yesibili, ukucindezelwa kwe-sidelobe, ukugcwaliswa kweqanda, ukwehla kwe-beam…
Ipharamitha yesifunda
Isilinganiso segagasi lokuma kwe-Voltage VSWR, i-reflection coefficient Γ, i-RL yokulahlekelwa kokubuyisela;
Ø I-Impedans yokufaka i-Zin, ukulahleka kokudluliselwa kwe-TL;
Ø Iso yokuhlukanisa;
Ø I-oda lesithathu le-Passive Intermodulation PIM3...
I-antenna ephansi
Ububanzi Beam Evundlile
Isilinganiso sangaphambili ukuya emuva: Icacisa isilinganiso samandla aphuma phambili aye kuyi-antenna kanye namandla aphuma emuva aphakathi kuka-±30°.
Ubudlelwano phakathi kwenzuzo nosayizi we-antenna kanye nobude bokukhanya
Ukucaba "isondo", lapho isignali igxilile, inzuzo ephezulu, ubukhulu be-antenna bukhulu, futhi i-beamwidth ibe mincane;
Amaphuzu ambalwa abalulekile okuzuza kwe-antenna:
I-antenna iyisisetshenziswa esingenzi lutho futhi ayikwazi ukukhiqiza amandla. Ukuzuza kwe-antenna kumane kuyikhono lokugxilisa amandla ngokuphumelelayo ukuze kukhanye noma ukwamukela amaza kagesi ngendlela ethile.
Ø Ukuzuza kwe-antenna kukhiqizwa ukuphakama kwamavibrator. Lapho inzuzo iphezulu, ubude be-antenna buba bude. Khulisa inzuzo ngo-3dB bese uphinda kabili ivolumu.
Lapho ukuzuza kwe-antenna kuphezulu, kuba ngcono ukuqondisa, amandla agxila kakhulu, futhi i-lobe iba mncane.
1.5 Amapharamitha oMsebe
I-polarization: ibhekisela ku-trajectory noma ukuguqulwa kwe-vector yasensimini kagesi emkhathini.
1.6 Amapharamitha weSekethe
Buyisela ukulahlekelwa
Okwesibili, imikhiqizo yezinti
2.1 Indlela Yokuqamba I-Antenna:
Izigaba ze-antenna :ODP(othingo lwepuleti eliqondisayo lwangaphandle),OOA(uthi lwe-omnidirectional lwangaphandle),i-IXD(uthi lophahla lwangaphakathi),OCS(uthi olungaphandle lwe-bidirectional), OCA(uthi lweqoqo lwangaphandle), i-OYI(uthi lwe-Yagi lwangaphandle), ORA(ukuphonsa ngaphandle i-antenna engaphezulu), i-IWH(i-antenna yasendlini) nokunye.
I-engeli yamandla ehhafu :032,065,090,105,360(i-antenna yesiteshi esiyisisekelo) 020,030,040,050,060,075,090,120,160,360 (i-antenna ephindayo)
Imodi ye-polarization: R(i-polarization ekabili), V(i-polarization eyodwa)
Inzuzo: Inani eliphezulu lingu-21dbi ngokusekelwe kunani langempela
Izinhlobo ezihlangene: D(Din head), N(N-type head), S(SMA head), T(TNC head) njalonjalo
Ibhendi yefrikhwensi:
Ikhodi yokucaciswa: Izinhlamvu zesiRoman zibonisa ukukhiqizwa komkhiqizo. Lezi zinhlamvu nezinombolo ezilandelayo zikhombisa i-engeli yokucwilisa, umumo, nolunye ulwazi. F uhlobo; V umthethonqubo kagesi; I-RV ye-remote module kagesi
2.2 I-Base Station Antenna
I-Omnidirectional Antenna Dual-Frequency Antenna
I-Antenna ye-Three-Frequency
I-Ceiling Antenna
I-Antenna Efakwe Odongeni
I-Antenna ye-Yagi
I-Antenna yegridi
I-Broadband Omnidirectional Antenna Log-Periodic Antenna Plate Antenna
3.1 Isihlukanisi Samandla
Isihlukanisi samandla yidivayisi ehlukanisa amandla esignali eyodwa yokukhiphayo kube okokukhiphayo okubili noma ngaphezulu. Kuyi-converter ye-impedance.
Ø Ingabe isihlukanisi samandla singahlehliswa ukuze singene esikhundleni sesihlanganisi?
Uma isetshenziswa njenge-synthesizer, ayidingi nje kuphela ukuhlukaniswa okuphezulu, isilinganiso esiphansi samagagasi, kodwa futhi igxile esimisweni sokumelana namandla aphezulu. Uma kucatshangelwa ukuthi izimbobo zokukhiphayo zesihlukanisi samandla esivamise ukusetshenziswa awafani, igagasi elikhulu lokuma; Ngenxa yokumelana kwamandla okuphansi kwesihlukanisi samandla e-microstrip, asincomi ukusebenzisa isihlukanisi samandla ukuze simiselele isihlanganisi.
I-Cavity Power Divider
Okwesine, isingeniso se-coupler
4.1 Umbhangqwana
Ø I-Coupler iwuhlobo lwengxenye esabalalisa amandla esignali yokokufaka ngokusebenzisa inkambu kagesi kanye nokuhlanganisa indawo kazibuthe ukuze ibe yingxenye yokuphuma kokuphela kokuhlanganisa, kanye nawo wonke amanye amalitha okukhiphayo ukuze kuqedelwe ukusatshalaliswa kwamandla.
Ø Ukusabalalisa amandla kwe-coupler akuhlukaniswanga ngokulinganayo. Kwaziwa nangokuthi isampula yamandla.
I-coupler eyisiqondiso
Ama-coupler aqondisayo avame ukusetshenziswa ngendlela ecacisiwe yokugeleza kwamasignali e-microwave ukuze kuthathwe isampula, inhloso enkulu iwukuhlukanisa nokuhlukanisa isignali, noma ngokuphambene ukuxuba amasignali ahlukene, lapho kungekho mthwalo wangaphakathi, ama-couplers aqondisayo ngokuvamile ayinethiwekhi enezimbobo ezine.
I-Cavity coupler
Izici: Ukuthwala amandla aphezulu, ukusebenza kokulahlekelwa okuphansi.
Isizathu:
1. I-cavity igcwele umoya, futhi inqubo yokudlulisela, ukuchithwa kwemidiya okubangelwa i-air medium kuphansi kakhulu.
2. Ibhande lezintambo ezihlanganisiwe ngokuvamile lenziwa nge-conductor ene-conductivity kagesi enhle (efana ne-silver plating endaweni yethusi), futhi ukulahlekelwa kwe-conductor akunakwa.
3. Umthamo omkhulu womgodi, ukuchithwa kokushisa okusheshayo. Melana namandla aphezulu.
I-Attenuator
Ø I-attenuator iyisici esinezimbobo ezimbili
Ama-attenuators asetshenziswa kakhulu ama-absorption attenuators.
I-coaxial attenuator ivamise ukusetshenziswa kubunjiniyela, ehlanganisa inethiwekhi yokunciphisa i-“π” noma “T”.
Ama-coaxial attenuators ngokuvamile anezinhlobo ezimbili zama-attenuators angaguquki.
Ø Ama-Attenuators asetshenziswa kakhulu ukulawula amandla okudlulisela amasiginali e-microwave ohlelweni lokubona futhi asebenzise amandla engeziwe, ngaleyo ndlela andise ububanzi obuguquguqukayo bokulinganisa isignali, njengamamitha wamandla, izihlaziyi ze-spectrum, izikhulisamsindo, izamukeli, njll.
Iwebhusayithi:https://www.lintratek.com/
#Isikhulisi 4g #Phinda 4g
衰减器
Ø衰减器是二端口互易元件
Ø衰减器最常用的是吸收式衰减器.
Ø工程中通常使用的是同轴型衰减器，由“π”型或“T”型衰减网络组成.
Ø同轴衰减器通常有固定及可变衰减两种.
Ø如功率计，频谱分析仪，放大器，接收器等。
Isikhathi sokuthumela: Jan-18-2024