Riba:
- Ikon fassara ra'ayoyin RF kamar matching impedance, S-parameters da VSWR tare da tallafin AI
- Ability don saita ribar eriya, EIRP, asarar hanya da haɗin kai na kasafin kuɗi mataki-mataki tare da AI
- Ability don inganta AI shawarar RF / eriya mafita tare da simintin filin, aunawa da ƙayyadaddun tsari
Zane na RF (Redio Frequency) shine mafi girman "na jiki" kuma mafi ƙarancin gafartawa na injiniyan lantarki. A babban mita, tsayin alamar, ingancin mai haɗawa, wurin eriya yana haifar da bambanci; Ƙananan kurakurai sun juya zuwa babban hasara. A cikin wannan rukunin za ku ga yadda ake amfani da AI a cikin nazarin matching impedance, S-parameters, VSWR, ra'ayoyin eriya da kasafin kuɗi na haɗin gwiwa (lissafin duk riba da asara tsakanin mai aikawa da mai karɓa). Amma a cikin RF horo na tabbatarwa ya fi tsauri: duk wani riba, asara ko ƙima da AI ke bayarwa ba abin dogaro bane ba tare da simintin filin ba (EM simulation) da ainihin ma'auni (VNA, ɗakin anechoic). Haka kuma, ikon watsa shirye-shirye yana iyakance ta doka kuma alhakin doka ya taso lokacin da aka keta wannan iyaka.
Impedance, yarda da tunani
A cikin RF, ana canja wurin wutar lantarki da kyau daga tushe zuwa kaya kawai lokacin da abubuwan da suka dace suka dace. Impedance shine jimlar juriya-kamar girma (Ω) na da'ira zuwa madadin halin yanzu. A tsarin RF ma'auni yawanci 50 Ω. Lokacin da tushen da maƙasudin kaya ba su dace ba, wasu siginar suna nuna baya; wannan yana haifar da asarar ƙarfi da rashin kwanciyar hankali. Adadi biyu waɗanda suke auna tunani:
- Komawa hasara (dB): Nawa ikon da aka nuna baya; mafi girma dB yana da kyau (ƙananan tunani).
- VSWR (Rabin Wave Tsayayyen Wuta): 1:1 cikakkiyar matches, 2:1 iyakar karɓuwa na yau da kullun; Yana kara muni yayin da yake girma.
S-parameters (Sigar watsawa) suna ayyana shigarwa/fitarwa da alaƙar tunani/watsawa tsakanin ƙofofin toshewar RF gwargwadon mita. S11 yana nuna tunanin shigarwa, S21 yana nuna watsawa gaba (riba/rasa). AI yayi bayanin waɗannan ra'ayoyin da kyau kuma yana koyar da dabaru na ginshiƙi na Smith (kayan aikin hoto da aka yi amfani da shi don daidaitawa). Amma ainihin S-parameters na da'irar ku ana sanin su ne kawai ta hanyar ma'aunin VNA (Vector Network Analyzer); Hasashen AI shine farawa.
Tushen Antenna
Eriya ita ce bangaren da ke juyar da siginar lantarki zuwa igiyar wuta ta lantarki (kuma akasin haka). Mahimman sigogi:
- Gain (dBi): Ƙarfin eriya don tattara makamashi a hanya ɗaya; dangane da isotropic (daidai a duk kwatance).
- Tsarin Radiation: Rarraba makamashi bisa ga jagora.
- Bandwidth: Mitar kewayon da eriya ke aiki da kyau.
- Polarization: Gabatarwa na filin (a tsaye, a kwance, madauwari); Dole ne mai watsawa da mai karɓa su kasance masu jituwa.
- Kusa da filin / filin nesa: A cikin wane ɓangaren eriya ne aka yi ma'aunin; An bayyana riba a cikin fage mai nisa.
Ya bayyana da kyau nau'ikan eriya na AI (dipole, patch, yagi, array) da ka'idojin zaɓi. Amma ainihin riba da tsari suna hulɗa tare da allon da aka ɗora eriya a kai, harka, da muhalli; Ƙimar ƙarshe ta ƙayyade ta hanyar simintin EM da ma'aunin ɗakin anechoic.
Kasafin kuɗi na haɗin gwiwa: lissafin riba da asara
Kasafin kuɗin haɗin yanar gizon yana ƙididdige adadin siginar zai kasance a mai karɓa kuma ko ya isa ta ƙara duk riba da asarar akan hanyar daga mai aikawa zuwa mai karɓa. Ma'auni na asali a cikin kalmomi: ƙarfin da aka karɓa = ikon watsawa + ribar eriya - asarar hanya - asarar kebul / mai haɗawa + karɓar ribar eriya. Sakamakon wannan yakamata ya kasance sama da madaidaicin madaidaicin mai karɓa kuma tare da gefen hanyar haɗin gwiwa (gefen aminci).
Mahimman ra'ayi: EIRP (Ingantacciyar Isotropic Radiated Power) = ikon watsawa + ribar eriya - hasara; wannan ita ce ƙimar da doka ta iyakance. Asarar hanya tana ƙaruwa tare da nisa da mita (ka'idar asarar hanyar sarari kyauta). Hankalin mai karɓa shine mafi ƙarancin ƙarfin da mai karɓa zai iya warwarewa daidai.
AI yana taimaka muku gina hanyar haɗin yanar gizon kasafin kuɗi mataki-mataki kuma yana bayyana kowane lokaci. Amma dole ne a tabbatar da ƙimar da ke cikin kowane layi: ikon watsawa da azancin mai karɓa daga takaddar bayanai, ribar eriya daga ma'auni, asarar kebul daga masana'anta, asarar hanya daga ainihin ƙirar muhalli. AI yana cewa "haɓaka na USB shine 3 dB" ba tabbaci ba ne.
Tukwici: Shin AI ta saita kasafin kuɗin hanyar haɗin gwiwa azaman "tebur kwarangwal mara komai" (lokaci, ƙima, naúrar, tushe, alamar +/-). Cika kowane tantanin halitta da kanka daga ainihin tushen. Bari AI ta sarrafa ilimin lissafi da dabaru; Ka kawo lambobin.
uku mini lokuta
Case 1 - Ƙimar EIRP da aka yi. Ƙungiya ta tambayi AI game da iyakar EIRP don na'urar IoT a cikin band 868 MHz; AI yana ba da ainihin ƙima da lambar abu. Ƙungiyar tana daidaita samfurin daidai. A cikin dakin gwaje-gwaje na gwaji, an bayyana cewa iyaka ya bambanta dangane da yanki da yanki, abin da aka bayar ba gaskiya bane, kuma an gyara samfurin. Halin da ya dace shine tabbatar da rubutun tsari mai dacewa (misali ma'aunin na'urar gajeriyar gajeriyar hanya ta ETSI da shawarar ikon ƙasa) daga tushen hukuma.
Case 2 - eriya mara jituwa. Wani injiniya ya shigar da eriya mai nauyin 50 Ω a kan jirginsa, amma lokacin da ya auna VSWR tare da VNA, ya zama 3.5: 1; Yawancin siginar ana nuna baya. Ya tattauna abubuwan da za a iya haifar da su (ciwon layin ciyarwa, sanya eriya, tasirin kwasfa, da'irar daidaitawa) tare da AI kuma yana ƙirƙira matakin ƙirar kewaye. Yana daidaita ma'aunin, yana rage VSWR zuwa 1.4:1. Anan AI ya ba da hasashe da hanya; Ma'aunin VNA ya tabbatar da kowane mataki.
Hali na 3 - Kar a manta da gefen haɗin haɗin gwiwa. Ma'aikacin ɗalibi yana sanya kasafin kuɗin hanyar haɗin gwiwa "kawai a cikin ma'auni": ikon da aka karɓa daidai yake da bakin kofa. AI yana tunatar da mu cewa wannan ita ce gefen sifili, hanyar haɗin za ta ragu akai-akai saboda ruwan sama, faɗuwar hanyoyi da yawa, da tsufa, kuma ya bayyana cewa yawanci ƴan dB na gefe (ko ma fiye da haka a cikin yanayin faɗuwa) ana buƙata. Yana ƙara gefen ɗaki. Darasi: ba a yin kasafin kuɗin haɗin gwiwa ba tare da iyaka ba; AI yana tunawa da wannan ka'ida, an ƙayyade ainihin gefe ta hanyar ma'aunin yanayi.
Samfuran gaggawar da za a iya kwafi
LINK BUDGET SKELETON TEMPLATE"Ƙirƙirar kwarangwal ɗin tebur na kasafin kuɗi mara amfani don hanyar haɗi mara waya. ginshiƙai: lokaci (ikon watsawa, karɓar eriya, asarar kebul / mai haɗawa, asarar hanya, karɓar eriya, ƙimar mai karɓa, gefen haɗin haɗin gwiwa), ƙimar, naúrar (dBm/dBi/dB), alamar (+/-), wanda ke ba da ma'auni (+/-), ma'auni (+/-), tushen tushen bayanai, BLANK, ma'auni. samfurin) kowane lokaci za a ɗauke shi daga Yi bayanin kula.
TEMPLATE MATSALAR IMEDANCE MATCHING "Bayyana tsarin dacewa da impedance don nauyin da bai dace da tsarin 50 Ω ba (L-grid, pi/T, stub). Bayyana ma'anar ginshiƙi na Smith mataki-mataki. KADA KA ba da ainihin ƙimar bangaren; jaddada cewa kowane mataki dole ne a tabbatar da kuma daidaita shi tare da ma'aunin VNA.
TEMPLATE ZABIN ANTENNA " Kwatanta nau'in eriya don aikace-aikacen mai zuwa: [yawanci, buƙatun riba, jagora / omni, ƙayyadaddun girman girman, polarization]. Ba da fa'ida / hasashe da amfani na yau da kullun ga kowane nau'in. KAR KA ba da lambar riba daidai; jihar ainihin riba da tsari za a ƙaddara ta hanyar EM kwaikwayo a kan jirgin / hannun riga da kuma ɗakin anechoic."
RF SAMUN SAMUN SAUKI "Jera abubuwan da suka shafi ka'idoji waɗanda dole ne samfur ya bi cikin sharuddan hasken wutar lantarki/EIRP don [mita band] (waɗanda daidaitattun iyalai, shirin tashar, iyakar wutar lantarki, zagayowar aiki). BA DA KYAUTA GASKIYA DA LAMBAR ITEM; jaddada cewa kowane batu dole ne a tabbatar da shi daga daidaitaccen ma'auni na hukuma."
Rauni mai ƙarfi / Ƙarfi mai ƙarfi
RAUNI GASKIYA: "Shin wannan hanyar haɗin yana aiki?"
KARFIN GASKIYA: "Kafa tsarin tsarin tsarin kasafin kuɗi na hanyar haɗin yanar gizo (ikon watsawa, ribar eriya, asarar kebul, asarar hanya, ƙwarewar mai karɓa, gefe). Ƙayyade daga wane tushe kowane lokaci za a tabbatar da shi. Idan na ba da dabi'u kamar wutar lantarki 14 dBm, nisa 2 km, mita 868 MHz, ƙididdige asarar hanyar sararin samaniya kyauta amma barin sauran sharuddan da ake buƙata BLANK 'Yana aiki/ba ya aiki' "Yi shawarar ku."
Rarraunan hanzari yana buƙatar hukunci ba tare da mahallin ba; Ƙarfi mai ƙarfi yana daidaita asusun, ya ba da alhakin albarkatu, kuma ya bar yanke shawara zuwa gare ku tare da gefe.
Teburin kayan aikin tabbatarwa na RF
girman
kayan aiki tabbatarwa
Matsayin AI
Impedance/VSWR/S-parameter
VNA (Vactor Network analyzer)
Hanyar daidaitawa da tafsiri
Antenna riba / tsari
EM kwaikwayo + anechoic chamber
Nau'in zaɓi, jerin ma'auni
Ikon watsa shirye-shirye/EIRP
Calibrated spectrum analyzer + jarrabawar da aka amince da ita
Jerin batutuwan doka (ba labarai ba)
Asarar hanya / ɗaukar hoto
Gwajin tuƙi / ma'aunin filin
Saitin samfurin, tsarin lissafi
Tsanaki: A cikin RF, hanyar haɗin da "take aiki akan takarda" na iya karyawa ta hanyar faɗuwar hanyoyi da yawa, tsangwama, da haɓakar tasirin. Kasafin kuɗi na haɗin gwiwa tabbaci ne na farko, ba hujja ba har sai an tabbatar da shi ta hanyar aunawa.
Kuskuren gama gari
- Samun iyakar EIRP/watsawa azaman lamba daga AI. Iyaka ya bambanta ta band, ƙasa da tashoshi; An tabbatar da shi ta hanyar rubutu na hukuma.
- Karɓar matching impedance ba tare da aunawa ba. Babban VSWR yana haifar da asarar wutar lantarki da rashin zaman lafiya; VNA ta tabbatar da hakan.
- Karɓar ribar eriya tare da ƙimar filin kyauta. Tasirin katin / shroud yana canza riba da tsari.
- Yin kasafin hanyar haɗin gwiwa ba tare da gefe ba. Margin yana da mahimmanci don dushewa da canjin muhalli.
- Yin watsi da asarar kebul/haɗi. A babban mitar, waɗannan mahimman abu ne na kasafin kuɗin haɗin gwiwa.
a takaice
A cikin wannan rukunin kun yi amfani da AI azaman mai ba da bayani mai ƙarfi da janareta mai ƙima don matching impedance, S-parameters, VSWR, dabarun eriya da haɗin ginin kasafin kuɗi. Amma RF yanki ne inda ma'aunin ya mamaye gabaɗaya: an tabbatar da rashin ƙarfi ta hanyar VNA, samun eriya ta hanyar simintin EM da ɗakin anechoic, watsa iko ta hanyar ma'auni da ingantaccen gwaji, ɗaukar hoto ta ma'aunin filin. Ana saita iyakoki na wutar lantarki / EIRP ta tsari kuma ba a ɗauka azaman lambobi daga AI; An tabbatar da shi ta hanyar rubutu na hukuma. Koyaushe saita kasafin hanyar haɗin gwiwa tare da gefe kuma tabbatar da kowane layi daga ainihin tushen sa.
Aikin aikace-aikace
Shin AI ta kafa tebur mara komai tare da samfurin “kwarangwal kasafin kuɗi na haɗin gwiwa”. Ba da ƴan ƙima kamar ƙarfin watsawa, mita da nisa da kanku kuma a ƙididdige asarar hanyar sarari kyauta. Cika sauran sharuɗɗan (ribar eriya, asarar kebul, azancin mai karɓa) daga ainihin/samfurin bayanan bayanan kuma lissafta gefen haɗin. Yi sharhin sakamakon a cikin jumla ɗaya: ya isa gefe, idan ba haka ba, wane lokaci za a iya inganta. A ƙarshe, jera abubuwan ƙa'idodi na kaset ɗinku (maudu'in, ba labarin ba) tare da samfurin "Regulatory check" na RF.
jerin abubuwan dubawa
- [ ] Ban sami ikon watsawa / iyakar EIRP azaman lamba daga AI ba; Na tabbatar da shi daga ma'auni da hukuma.
- [ ] Na shirya don tabbatar da impedance/VSWR tare da ma'aunin VNA.
- [] Na kimanta ribar eriya ta aunawa/kwaikwaya akan katin/harka, ba filin kyauta ba.
- [ ] Na saita kasafin hanyar haɗin gwiwa tare da gefe kuma na cika kowane jere daga ainihin tushen sa.
- [ ] Na haɗa da kebul da asarar haɗin haɗi a cikin kasafin kuɗi na haɗin gwiwa.
- [ ] Na yi la'akari da kasafin kuɗi na haɗin gwiwa ba hujja ta ƙarshe ba, amma farkon da za a tabbatar da shi ta hanyar aunawa.