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Nan epòk entènèt mobil, telefòn mobil entegre pi plis teknoloji RF, tankou telefòn doub mòd / milti mòd ki sipòte plizyè estanda nan LTE, TD-SCDMA, WCMDA, CDMA2000, HSDPA, EDGE, GPRS, ak GSM, ki ka reyalize VoIP, Wi-Fi, GPS, RFID, NFC telefòn mobil pou navigasyon, peman otomatik, ak resepsyon televizyon. Itilize plizyè teknoloji RF fè desen telefòn mobil yo pi konplèks.
Konpozisyon debaz nan teknoloji frekans radyo telefòn mobil ak modil frekans radyo telefòn mobil
Pati nan frekans radyo nan yon telefòn mobil 3G konsiste de de pati: frekans radyo k ap resevwa ak frekans radyo voye. Sikwi prensipal li yo gen ladan antèn, switch san fil, k ap resevwa filtre, sentèz frekans, anplifikasyon frekans segondè, k ap resevwa osilateur lokal yo, melanje, frekans entèmedyè, transmèt osilatè lokal yo, kontwòl anplifikatè pouvwa, anplifikatè pouvwa ak sou sa.
An jeneral, eleman kle nan pati debaz frekans radyo telefòn mobil yo sitou gen ladan transceiver RF (transceiver), anplifikatè pouvwa (PA), modil switch antèn (ASM), modil devan (FEM), duplexer, RF SAW filtre ak sentetizè , elatriye, jan yo montre nan foto a. Sa ki anba la yo pral konsantre sou entwodiksyon an soti nan twa pati debaz:
Figi dyagram estrikti debaz nan modil frekans radyo telefòn mobil yo
Modil frekans radyo telefòn mobil anplifikatè pouvwa (PA)
Se anplifikatè a pouvwa (PA) itilize anplifye pwodiksyon an frekans radyo pa émetteur a. Jaden anplifikatè pouvwa a se yon jaden endepandan ak papòt. Li se tou yon eleman ki pa ka entegre nan yon telefòn mobil. Li se tou eleman ki pi enpòtan nan yon telefòn mobil. Pèfòmans telefòn mobil lan, anprint, bon jan kalite apèl la, fòs telefòn mobil lan, ak lavi batri a tout detèmine pa pouvwa anplifikatè a deside.
Manifaktirè prensipal yo nan jaden anplifikatè pouvwa a se RFMD, Skyworks, TriQuint, Renesas, NXP, Avago, ANADIGICS. Koulye a, Qualcomm, ki te orijinèlman yon patnè antrepriz PA, te tou dirèkteman Joined mache a PA. Li pral lanse PA pwodwi nan pwosesis CMOS nan dezyèm mwatye nan 2013, sipòte LTE-FDD, LTE-TDD, WCDMA, EV-DO, CDMA 1x, TD-SCDMA ak GSM / EDGE sèt mòd, spectre an pral kouvri plis pase 40 Gwoup Mizik frekans nan itilize mondyal, ak te anonse antre li nan endistri a PA ak avantaj ki genyen nan milti-frekans ak milti-mòd.
Aprè mache PA a te fè eksperyans epòk LDMS PA "defi" a, asenid galyòm (GaAs) PA te vin "defi" mache PA a nan epòk 3G la. TriQuint, ki te dirije gallium asenid al atake mache a PA, ap aktivman tap mete deyò plan an pou asenid gallium, lanse yon wo-efikasite milti-frekans milti-mòd anplifikatè pouvwa MMPA pou ekspansyon nan 3G / 4G telefòn entelijan.
Qualcomm ap atake mache PA a ak CMOS PA. Nan lavni, PA ka vin yon pati nan platfòm telefòn mobil lan, epi pral gen yon fenomèn nan konpayi telefòn mobil chip platfòm akizisyon ak fusion konpayi PA.
Kouman entegre anplifikatè pouvwa sa yo nan bann frekans diferan ak fòma se yon sijè enpòtan ke endistri a te etidye. Gen kounye a de solisyon: yon sèl se yon achitekti fizyon, ki entegre anplifikatè frekans radyo pouvwa ak frekans diferan, ak lòt la se yon entegrasyon sou lyen siyal la, se sa ki, PA ak duplexers yo entegre. De konplo yo gen pwòp avantaj ak dezavantaj yo epi yo apwopriye pou diferan telefòn mobil. Achitekti konvèje, PA gen yon wo degre de entegrasyon, ki te gen avantaj gwosè evidan pou plis pase 3 Gwoup Mizik frekans, e li gen avantaj pri evidan pou 5-7 Gwoup Mizik frekans. Dezavantaj la se ke byenke PA a entegre, duplexer la toujou byen konplike, epi gen oblije chanje pèt lè PA a entegre, epi pèfòmans lan pral afekte. Pou achitekti nan lèt, pèfòmans lan se pi bon. Entegrasyon an nan anplifikatè a pouvwa ak duplexer a ka amelyore karakteristik aktyèl yo, sa ki ka sove dè dizèn de miliamp nan aktyèl, ki se ekivalan a pwolonje tan an pale pa 15%. Se poutèt sa, sijesyon endistri a se yo sèvi ak yon achitekti konvèje lè gen plis pase 6 Gwoup Mizik frekans (pa konte 2G, men 3G ak 4G), ak lè mwens pase kat Gwoup Mizik frekans, sèvi ak PA a ak duplexer entegre solisyon PAD. Koulye a, TriQuint ka bay de kalite solisyon achitekti, RFMD sitou pwefere achitekti a nan fizyon PA, ak Skyworks pwefere solisyon an milti-frekans PAD.
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