bidhaa Jamii
- FM Transmitter
- 0-50w 50w-1000w 2kw-10kw 10kw +
- TV Transmitter
- 0-50w 50-1kw 2kw-10kw
- FM Antenna
- TV Antenna
- antenna Accessory
- cable Connector Power Splitter dummy Load
- RF Transistor
- Usambazaji wa umeme
- Equipments Vifaa vya
- DTV Front Mwisho Vifaa
- Link System
- mfumo STL Microwave mfumo Link
- FM Radio
- Power mita
- Bidhaa nyingine
- Maalum kwa Coronavirus
bidhaa Tags
Fmuser Sites
- es.fmuser.net
- it.fmuser.net
- fr.fmuser.net
- de.fmuser.net
- af.fmuser.net -> Kiafrikana
- sq.fmuser.net -> Kialbeni
- ar.fmuser.net -> Kiarabu
- hy.fmuser.net -> Kiarmenia
- az.fmuser.net -> Kiazabajani
- eu.fmuser.net -> Kibasque
- be.fmuser.net -> Kibelarusi
- bg.fmuser.net -> Kibulgaria
- ca.fmuser.net -> Kikatalani
- zh-CN.fmuser.net -> Kichina (Kilichorahisishwa)
- zh-TW.fmuser.net -> Wachina (Jadi)
- hr.fmuser.net -> Kikroeshia
- cs.fmuser.net -> Kicheki
- da.fmuser.net -> Kidenmaki
- nl.fmuser.net -> Kiholanzi
- et.fmuser.net -> Kiestonia
- tl.fmuser.net -> Kifilipino
- fi.fmuser.net -> Kifini
- fr.fmuser.net -> Kifaransa
- gl.fmuser.net -> Kigalisia
- ka.fmuser.net -> Kijojiajia
- de.fmuser.net -> Kijerumani
- el.fmuser.net -> Kiyunani
- ht.fmuser.net -> Kikrioli cha Haiti
- iw.fmuser.net -> Kiebrania
- hi.fmuser.net -> Kihindi
- hu.fmuser.net -> Kihungari
- is.fmuser.net -> Kiaislandi
- id.fmuser.net -> Kiindonesia
- ga.fmuser.net -> Kiayalandi
- it.fmuser.net -> Italia
- ja.fmuser.net -> Kijapani
- ko.fmuser.net -> Kikorea
- lv.fmuser.net -> Kilatvia
- lt.fmuser.net -> Kilithuania
- mk.fmuser.net -> Kimasedonia
- ms.fmuser.net -> Kimalesia
- mt.fmuser.net -> Kimalta
- no.fmuser.net -> Kinorwe
- fa.fmuser.net -> Kiajemi
- pl.fmuser.net -> Kipolishi
- pt.fmuser.net -> Kireno
- ro.fmuser.net -> Kiromania
- ru.fmuser.net -> Kirusi
- sr.fmuser.net -> Mserbia
- sk.fmuser.net -> Kislovakia
- sl.fmuser.net -> Kislovenia
- es.fmuser.net -> Kihispania
- sw.fmuser.net -> Kiswahili
- sv.fmuser.net -> Kiswidi
- th.fmuser.net -> Thai
- tr.fmuser.net -> Kituruki
- uk.fmuser.net -> Kiukreni
- ur.fmuser.net -> Kiurdu
- vi.fmuser.net -> Kivietinamu
- cy.fmuser.net -> Kiwelsh
- yi.fmuser.net -> Yiddish
Metamaterial kuwezeshwa Antennas Msaada kuboresha Satellite Communications Systems
Januari 15, 2016
na Rebekka Coakley
Ndogo, nyepesi uzito, ni bora zaidi maonyesho na zaidi multifunctional Antena miniature na kuongezeka kwa utendaji inawezekana kutumia vifaa smart, kwa mujibu wa Penn State wahandisi. Moja ya maombi hasa kuahidi ya teknolojia hii ni kwa mifumo ya mawasiliano ya satellite.
Hizi antena alifanya ya metamaterials-viwandani vifaa kwamba kumiliki mali kigeni si kawaida kupatikana katika asili-inaweza kuunganishwa na digital kisasa radio umeme, ambazo programu kudhibitiwa, kuwezesha mfumo mabadiliko mawasiliano na mzunguko wa ajabu na ubaguzi agility.
Wahandisi, ambao taarifa ya utafiti wao katika suala ya hivi karibuni ya Juu Umeme Vifaa, maendeleo madogo, functionalized, metamaterial antenna kuendeshwa na vipengele wakati huo huo Mitsubishi la metamaterial na antenna pamoja kama mfumo, alisema Clinton Scarborough, ambaye alifanya kazi katika utafiti huu kwa dissertation yake.
Metamaterials unatokana mali zao kawaida kutoka miundo viwandani badala ya mwingiliano atomic au Masi peke yake.
"Antena Metamaterial makao mara nyingi wanakabiliwa na unyanyapaa wa impractically nyembamba bandwidths uendeshaji, kama vile Antena ndogo," alisema Scarborough. "Redio haja ya kuwa na uwezo wa kufanya kazi juu ya Bandwidth kubwa, lakini kawaida tu kwenye channel moja kwa wakati mmoja. Sheria za fizikia kulazimisha kwamba dogo metamaterial antenna itakuwa na Bandwidth mdogo, lakini redio ya kisasa kwa urahisi tune antenna ili ni kazi juu ya chochote channel redio kwa sasa ni kwa kutumia, kutoa utendaji kulinganishwa na kubwa broadband antenna wakati kuchukua nafasi chini na hata kutoa uwezo mpya. "
Wahandisi maendeleo metamaterial tunable kwamba inaruhusu yao tune miniaturized antenna na nyembamba bandwidths instantaneous hela bendi nzima mawasiliano kutegemea channel katika matumizi, alisema Douglas H. Werner, John L. na Genevieve H. McCain Mwenyekiti Profesa wa Uhandisi Umeme.
"Tuning metamaterial na antenna sanjari hutoa nguvu uendeshaji channel, na tunable, karibu-holela ubaguzi majibu kama faida aliongeza," alisema Werner. "Kwa kuajiri functionalized dhana yetu metamaterial, tumekuwa na uwezo wa kubuni njia ya dynamically tune mzunguko majibu na ubaguzi kwa antenna, wakati, wakati huo huo, kutoa njia ya kuongeza miundo kwa masafa ya chini."