Kapangidwe ka Antena Yamkati ya Chizindikiro Chokhazikika pa Mapiritsi
Mapiritsi amakono amafunika kuti apereke kulumikizana kokhazikika pazosowa zosiyanasiyana: misonkhano ya pa intaneti, kuphunzira patali, masewera, komanso kuyenda ndi zochitika zomwe zimachokera kumalo. Kumbuyo kwa chidziwitso chosavuta cha "zizindikiro zonse" pazenera, pali zovuta zovuta zaukadaulo, makamaka popeza ma antenna ayenera kuyikidwa pamalo ochepa kwambiri, pafupi ndi chitsulo, zowonetsera, mabatire, ndi zida zina zamagetsi zomwe zimakhudza magwiridwe antchito a wailesi. Nkhaniyi ikufotokoza mfundo, zovuta, ndi njira zopangira ma antenna amkati kuti asunge ma piritsi okhazikika a Wi-Fi, mafoni (4G/5G), Bluetooth, ndi GNSS (GPS, ndi zina zotero).
1. N’chifukwa chiyani antenna yamkati mwa piritsi ndi yovuta kuposa foni yam’manja?
Poyamba, mapiritsi ndi akuluakulu kuposa mafoni, zomwe zimapangitsa kuti kuyika ma antenna kuwoneke kosavuta. Komabe, pali zinthu zingapo zomwe zimapangitsa kuti kapangidwe kake kakhale kovuta:
1. Thupi lachitsulo ndi chophimba chachikulu: Mapiritsi ambiri amagwiritsa ntchito chimango cha aluminiyamu ndi chophimba chachikulu chomwe chingathe kuyamwa kapena kusuntha mafunde a wailesi.
2. Kusiyanasiyana kwa kagwiritsidwe ntchito: Mapiritsi nthawi zambiri amagwiridwa ndi manja awiri, othandizidwa ndi bokosi, oikidwa patebulo, kapena olumikizidwa ku kiyibodi. Kusintha konseku kumasintha malo amagetsi ozungulira antenna.
3. Zofunikira pa ma wailesi ambiri: Mapiritsi nthawi zambiri amaphatikiza Wi-Fi (2,4/5/6 GHz), Bluetooth (2,4 GHz), foni yam'manja (yotsika mpaka yapakati), ndi GNSS (pafupifupi 1,5 GHz). Iliyonse imafuna magwiridwe antchito abwino popanda kusokoneza inayo.
4. Kuchepa kwa malo: Ma antenna amkati amafuna malo enaake opanda chitsulo kuti apume. Pamapiritsi, malowa nthawi zambiri amakumana ndi batire lalikulu ndi ma speaker.
2. Magawo akuluakulu pakupanga kwa antenna ya piritsi
Kuti akwaniritse chizindikiro chokhazikika, opanga ma antenna samangofuna "kugwira chizindikirocho", komanso kukonza magawo otsatirawa:
- Kugwiritsa ntchito bwino kwa ma radiation: Kuchuluka kwa mphamvu ya RF yomwe imatulutsidwa/kugwidwa ndi antenna, m'malo motayika ngati kutentha kapena kuyamwa ndi zinthuzo.
– Kulephera ndi kufananiza (S11/kutayika kobwerera): Antena iyenera kufananizidwa ndi RF circuit (nthawi zambiri 50 ohms) kuti mphamvu yowunikira ikhale yaying'ono.
– Bandwidth: Piritsili liyenera kukhala ndi ma frequency ambiri, makamaka pa mafoni (ma band otsika monga 700–900 MHz mpaka 2–3 GHz) ndi Wi‑Fi.
– Kachitidwe ka kuwala: Ndibwino kuti pasakhale "malo osawoneka" akuluakulu piritsi likazunguliridwa kapena kugwiridwa.
– Kupatula ma antenna (kudzipatula): Ndikofunikira pa Wi‑Fi/5G MIMO kuti ma antenna awiriwa asalumikizane kwambiri.
– SAR ndi chitetezo: Ngakhale kuti mapiritsi nthawi zambiri amakhala kutali ndi mutu kuposa mafoni am'manja, malamulo a SAR akadali ofunikira, makamaka pa mafoni am'manja.
3. Mitundu ya ma antenna amkati omwe amagwiritsidwa ntchito kwambiri
Mapangidwe a mapiritsi nthawi zambiri amagwiritsa ntchito mitundu ina ya ma antenna otsatirawa, kutengera ndi gulu ndi zoletsa zamakina:
1. PIFA (Antena Yokhazikika Yokhala ndi Ma Planar Inverted-F)
Yodziwika bwino chifukwa cha kuphweka kwake komanso kusinthasintha kwake. Yoyenera ma band ena a m'manja ndi Wi-Fi, imapereka magwiridwe antchito okhazikika ikayikidwa pafupi ndi malo otsetsereka.
2. Antena ya IFA/FPC (dera losindikizidwa lopindika)
Imagwiritsa ntchito njira yosinthasintha yoyendetsera magetsi (FPC) yomwe ingalumikizidwe m'mphepete mwa chivundikirocho. Ndi yothandiza popanga zinthu zambiri ndipo imatha kupangidwa kuti ikhale ndi ma resonant ambiri pamagulu angapo.
3. Malo olumikizirana a antenna pa chimango
Kugwiritsa ntchito mipata mu chimango chachitsulo ngati zinthu zowunikira. Amagwiritsidwa ntchito kwambiri chifukwa mapiritsi nthawi zambiri amakhala ndi mafelemu achitsulo; vuto ndikuwongolera kulolerana kwa makina ndi kusintha kwa magwiridwe antchito chifukwa cha kugwiritsidwa ntchito/kuikidwa m'chikwama.
4. Chozungulira chimodzi/chozungulira
Yoyenera ma frequency apamwamba komanso madera enaake, nthawi zambiri imaphatikizidwa ndi netiweki yofananira kuti ikule gululo.
M'machitidwe, mapiritsi a "cellular + Wi‑Fi" nthawi zambiri amagwiritsa ntchito kuphatikiza kwa: ma antenna a cell a primary ndi diversity/MIMO, ma antenna a Wi‑Fi/Bluetooth (omwe nthawi zambiri amagawidwa), ndi ma antenna a GNSS omwe amayikidwa ndi phokoso lochepa.
4. Njira yokhazikitsira chizindikiro chokhazikika
Kuyika kwake ndi chinthu chachikulu chomwe chimapangitsa kuti chizindikiro chikhale chokhazikika chifukwa mapiritsi ali ndi zinthu zambiri zosokoneza komanso zoyamwa.
– Ikani antenna m'mphepete (malo oikira m'mphepete): M'mphepete pamwamba/pansi kapena mbali ya piritsi nthawi zambiri ndi malo abwino kwambiri chifukwa ili kutali ndi batri ndipo ili ndi "malo omasuka".
- Sungani kutali ndi mabatire ndi zishango za RF: Mabatire, chifukwa ndi akuluakulu, amatha kusintha mphamvu ya antenna. Zishango zachitsulo ndi mabulaketi zimathanso kuchepetsa magwiridwe antchito.
- Samalani ndi momwe magwiritsidwe ntchito amagwirira ntchito: Mapiritsi nthawi zambiri amagwiritsidwa ntchito ngati malo owonekera. Ma antenna awiri kumbali yakumanzere ndi yakumanja amathandiza kuti mbali imodzi ikhale yogwira ntchito bwino pamene dzanja lagwira ntchito.
– Ma antenna a MIMO osiyana: Pa 2×2 kapena 4×4 Wi‑Fi, mtunda wa antenna ndi momwe imayendera zimapangidwa mosiyana (kusiyanasiyana kwa polarization) kotero kuti throughput ikhale yokhazikika mu multipath.
5. Vuto lalikulu: kutseka chifukwa cha manja ndi chivundikiro
Zizindikiro za piritsi nthawi zambiri "zimasinthasintha" osati chifukwa cha netiweki, koma chifukwa chakuti antenna imasintha khalidwe lake ikakhala pafupi ndi manja, khungu, kapena bokosi.
- Manja ngati ma dielectric otayika: Yamwani mphamvu ya RF, chepetsani kukwera ndikusintha ma frequency a resonance (kuchepetsa).
– Mabokosi/makibodi a maginito: Zowonjezera zokhala ndi maginito, zitsulo, kapena zokutira zoyendetsera magetsi zimatha kusintha mawonekedwe a kuwala ndi kufanana kwake.
- Mayankho a kapangidwe:
- Pangani kapangidwe ka broadband kuti kusintha kwa ma frequency kusachotse nthawi yomweyo antenna kuchokera mu band.
- Onjezani chosinthira (capacitor/inductor kapena antenna tuner IC) kuti musinthe mphamvu.
- Ikani malo otseguka nthawi zonse, monga "mawindo a antenna" okhala ndi zinthu zosayendetsa mpweya pa chimango.
6. Kufananiza ndi kusintha maukonde a ma multiband
Netiweki yofananiza ma antenna (impedance adjustment circuit) ndiyo njira yopezera kutayika kwabwino kwa kubweza mu gulu lolunjika. Pa mapiritsi a multi-band, nthawi zambiri izi zimachitika:
– Kapangidwe ka ma resonance ambiri: Antena imodzi ili ndi ma resonance peaks angapo kuti iphimbe mikanda yosiyanasiyana.
- Kufananiza kosinthika: Imagwiritsa ntchito switch ya RF kusankha netiweki yofananira malinga ndi gulu la ma cellular lomwe likugwira ntchito.
– Chosinthira ma antenna: Chosinthira ma antenna IC chimatha kusintha capacitance/inductance nthawi yeniyeni kutengera momwe zinthu zilili, zomwe zimathandiza kuti ntchito igwire bwino ntchito pamene manja akuphimba antenna. Komabe, izi zimawonjezera mtengo, zovuta, komanso kugwiritsa ntchito mphamvu.
7. MIMO ndi wailesi zimagwirira ntchito limodzi (Wi‑Fi, Bluetooth, 5G)
Mapiritsi amakono amadalira MIMO kuti asunge kulumikizana mwachangu komanso kokhazikika m'malo odzaza anthu. Vuto ndi kupewa kusokonezedwa:
– Kudzipatula kokwanira: Ma antenna a MIMO omwe ali pafupi kwambiri adzakumana ndi kulumikizana, zomwe zimachepetsa mphamvu yolumikizira.
– 2,4 GHz Kukhalapo Mogwirizana: 2,4 GHz Wi‑Fi ndi Bluetooth zimagawana bandeji. Mapangidwe a ma antenna ndi zosefera ayenera kuchepetsa kusokoneza, komanso ma algorithms okhalapo mogwirizana pa chipset.
- Kukhazikika pansi kolamulidwa: Njira za pansi ndi mafunde obwerera zimakhudza kwambiri magwiridwe antchito a antenna; kapangidwe koyipa ka PCB kangalole kuti phokoso lifalikire ku GNSS kapena kuchepetsa kukhudzidwa kwa Wi-Fi.
8. Zipangizo ndi tsatanetsatane wa makina nthawi zambiri zimatsimikiza zotsatira zomaliza.
Magwiridwe antchito a ma antenna nthawi zambiri "amagwa" osati m'mayesero, koma akalowa m'dziko lenileni. Zinthu zofunika kwambiri pamakina ndi izi:
– Chitsulo poyerekeza ndi pulasitiki: Chitsulo chimapereka mphamvu, koma chimapangitsa kuti RF ikhale yovuta. Mapiritsi ambiri amagwiritsa ntchito "windo la RF" la pulasitiki m'malo ena.
– Zomatira, thovu, ndi tepi: Zipangizo zomatira zimatha kusintha chokhazikika cha dielectric ndikukhudza kumveka bwino.
– Kulekerera kwa kupanga: Kusintha pang'ono kwa kutalika kwa njira ya antenna, malo a FPC, kapena mtunda kuchokera pansi kungasinthe magwiridwe antchito. Kapangidwe kake kayenera kukhala kolimba ngakhale kakusintha.
9. Njira yopangira ndi kutsimikizira: kuyambira pa kuyeserera mpaka kuyesa m'munda
Kapangidwe ka antenna yamkati nthawi zambiri kumachitika mobwerezabwereza:
1. Tanthauzo la zofunikira: Band ya ma frequency, throughput target, TRP/TIS target, MIMO, malire a makina.
2. Kuyerekezera kwa maginito amagetsi (EM): Kupanga chitsanzo cha chivundikiro, chimango, sikirini, batire, ndi antenna.
3. Chitsanzo ndi kusintha: Yesani ma S-parameter ndi VNA, kenako sinthani kufanana.
4. Kuyesa kwa OTA (Pamwamba pa Mpweya): Kuyeza TRP (Mphamvu Yonse Yowala) ndi TIS (Kuzindikira Konse kwa Isotropic) mchipindamo.
5. Kuyesa kugwiritsa ntchito nthawi yeniyeni: Kumatsimikizira kulumikizana kokhazikika ikagwiridwa, ndi chikwama, m'malo osiyanasiyana, komanso m'malo ofooka a chizindikiro.
10. Kesimpulan
Kapangidwe ka antenna yamkati ya chizindikiro chokhazikika mu mapiritsi ndi kuphatikiza kwa RF engineering, makanika, ndi zomwe ogwiritsa ntchito amagwiritsa ntchito. Ma antenna ayenera kukhala ogwira ntchito bwino, osagwirizana ndi kutsekeka kwa dzanja/chikwama, ndikuthandizira MIMO ndi kukhalapo kwa ma radio ambiri. Njira zodziwika bwino zomwe zathandiza ndi monga kuyika ma antenna m'mphepete mwa chipangizocho, kugawa ma antenna a MIMO okhala ndi mawonekedwe osiyanasiyana, kugwiritsa ntchito malo okhazikika kapena ma FPC opangidwa bwino, komanso kufananiza ndi kusintha kosinthika. Ndi njira zoyeserera zodziwika bwino komanso kuyesa kwa OTA, mapiritsi amatha kusunga kulumikizana kokhazikika - ngakhale atagwiritsidwa ntchito m'njira zosiyanasiyana komanso pansi pa malo ovuta a netiweki.
Ngati mukufuna, nditha kusintha nkhaniyi kuti ikhale yaukadaulo kwambiri (monga, kuphatikiza zitsanzo za kapangidwe kake, zolinga/kudzipatula kwa S11, kapena kafukufuku wa 2×2 Wi‑Fi + 5G) kapena wotchuka kwambiri kwa owerenga ambiri.
