Ayyukan eriya GPS

Ayyukan eriya GPS

Mun san cewa mai gano GPS tasha ce don sanyawa ko kewayawa ta hanyar karɓar siginar tauraron dan adam.A yayin karɓar sigina, dole ne a yi amfani da eriya, don haka muna kiran eriyar da ke karɓar siginar eriyar GPS.An raba siginar tauraron dan adam GPS zuwa L1 da L2, tare da mitoci na 1575.42MHZ da 1228MHZ bi da bi, daga cikinsu L1 siginar farar hula ce mai buɗewa tare da madauwari madauwari.Ƙarfin siginar yana kusan 166-DBM, wanda shine sigina mai rauni.Waɗannan halayen sun ƙayyade cewa yakamata a shirya eriya na musamman don karɓar siginar GPS.

1. Ceramic sheet: Ingancin yumbu foda da tsarin sintiri kai tsaye yana shafar aikinsa.Abubuwan yumbura a halin yanzu ana amfani da su a kasuwa sune 25 × 25, 18 × 18, 15 × 15 da 12 × 12.Mafi girman yanki na takardar yumbura, mafi girman yawan dielectric akai-akai, mafi girman mitar resonance, kuma mafi kyawun sakamako mai karɓa.Yawancin yumbu guda na ƙirar murabba'i ne, don tabbatar da cewa resonance a cikin shugabanci na XY shine ainihin iri ɗaya, don cimma tasirin tarin tarin taurari.

2. Layin Azurfa: Layin azurfa a saman eriyar yumbu na iya shafar mitar eriya.Madaidaicin mitar guntu yumbura ta GPS ya faɗi daidai a 1575.42MHz, amma yanayin mitar eriya yana da sauƙin shafar yanayin da ke kewaye, musamman lokacin da aka haɗa shi a cikin injin gabaɗaya, dole ne a daidaita wurin mitar don kiyayewa. 1575.42MHz ta hanyar daidaita siffar murfin saman azurfa..Don haka, masu kera na'ura na GPS dole ne su ba da haɗin kai tare da masu kera eriya yayin siyan eriya da samar da cikakkun samfuran injin don gwaji.

3. Nunin ciyarwa: eriyar yumbu yana tattara siginar ƙara ta wurin ciyarwar kuma aika shi zuwa ƙarshen baya.Saboda madaidaicin madaidaicin eriya, gabaɗayan wurin ciyarwar baya tsakiyar eriya, amma an ɗan daidaita shi ta hanyar XY.Irin wannan hanyar daidaitawa impedance yana da sauƙi kuma baya ƙara farashi.Motsawa a cikin gatari ɗaya kawai ana kiran eriya mai son zuciya ɗaya, kuma motsi a cikin gatura biyu ana kiransa son zuciya biyu.

4. Amplifying circuit: siffar da yanki na PCB dauke da yumbu eriya.Saboda halaye na sake dawowa GPS, lokacin da bango ya kasance 7cm × 7cm

Eriyar GPS tana da mahimman sigogi guda huɗu: riba (Gain), tsayayyen igiyar ruwa (VSWR), siffa mai amo (Siffa mai hayaniya), rabon axial (Ratio Axial).Daga cikin su, an jaddada ma'auni na axial musamman, wanda shine muhimmiyar alama don auna bambancin siginar siginar dukan na'ura a wurare daban-daban.Tun da tauraron dan adam ana rarraba bazuwar a cikin sararin samaniya, yana da matukar muhimmanci a tabbatar da cewa eriya suna da irin wannan azanci a kowane bangare.Axial rabo yana shafar aikin eriya, tsarin bayyanar, da'ira na ciki da EMI na injin gabaɗaya.