Abstract
Nekusarudzwa kwayo kwepamusoro, kugadzikana kwepamusoro, uye kurasikirwa kwakaderera kwekuisa, iyo Crystal Sefa inoita basa risingadzoreki muhurongwa hwemazuva ano hwekutaurirana. Ichi chinyorwa chinosuma musimboti wekushanda uye chimiro chekristaro mafirita, chakanangana nekuongorora mashandisiro avo akajairika mumasisitimu ekutaurirana akadai sewaya kutaurirana, redhiyo neterevhizheni, uye radar masisitimu, uye pakupedzisira inokurukura maitiro avo ebudiriro uye matambudziko avanotarisana nawo.
1. Nhanganyaya
Mune akasiyana emagetsi masisitimu ekutaurirana, mafirita chikamu chakakosha chechiratidzo chekugadzirisa, chinoshandiswa kusarudza inodiwa frequency bhendi uye kudzvinyirira ruzha uye kukanganisa. Sezvo iyo yekukurukurirana spectrum inowedzera kuwanda, zvinodiwa zvepamusoro zvinoiswa pamberi pekuita sefa.
2. Kushanda Nheyo uye Hunhu hweCrystal Filters
2.1 Kushanda Nheyo
Crystal mafirita anoshandisa iyo piezoelectric mhedzisiro uye mechanic resonance maitiro emakristasi equartz kuti awane frequency selectivity. Kirasi yequartz ine ruzha rwakanyanya rwerudaviro panguva yakati wandei, uye mutinhimira uyu unogona kugadzira bhendi-kupfuura kana bhendi-kumisa sefa kuburikidza nemagadzirirwo edunhu, rinoshandiswa kunyatsosefa kana kudzvanyirira masaini mune imwe frequency bhendi.
2.2 Hunhu Hukuru
Yakakwirira Q-chinhu: Hunhu hwemakristasi equartz hunogona kukwirisa kusvika 10⁴~10⁶, inova yakakwira zvakanyanya kupfuura yeakajairika maseketi eLC;
High selectivity: Inogona kunyatso kusefa mukati meiyo yakatetepa bandwidth, inokodzera chaiyo yepakati frequency (IF) yekuongorora;
Good frequency stability: Kusakanganiswa netembiricha nenguva, kuona-kugadzikana kwenguva refu kwenzira dzekufambisa mashoko;
Saizi diki uye kuvimbika kwepamusoro: Inokodzera masisitimu akaiswa uye yakakwirira-density integrated circuits.
3. Zvishandiso zveCrystal Filters muKukurukurirana Munda
3.1 Wireless Communication Systems
Mune redhiyo transceivers, mafirita ekristaro anoshandiswa zvakanyanya muchiratidzo chekusefa nhanho yepakati frequency level (senge 10.7 MHz). Maapplication akajairika anosanganisira:
Single-Sideband (SSB) kutaurirana: Inoshandiswa kudzvanyirira mapikicha nemasaini emanyepo;
Amateur redhiyo: Kunyatso gating chiteshi chinodiwa kuti uvandudze kunzwa;
Nhaurirano yenhare: Senge yekutanga yepakati frequency kugamuchira mamodule mumasisitimu akaita seGSM neCDMA.
3.2 Satellite uye Radar Kukurukurirana
Mu radar nesatellite ground station masisitimu, mafirita ekristaro anowanzo shandiswa kumberi-kumagumo mamodule ekusefa ekutambira machanera, kunyanya mumasefa epakati nepakati uye kudzvanya matsimba, achitamba basa mukurwisa-kukanganisika uye kugadzirisa kugadzirisa.
3.3 Redhiyo neTerevhizheni
Mune amplitude modulation (AM) uye mapfupi-wave nhepfenyuro anogashira, mafirita ekristaro anoshandiswa mune yepakati frequency amplification nhanho, iyo inogona kupa yakanaka chiteshi chekuzivikanwa uye nepedyo frequency kudzvinyirira kuita, kunatsiridza kujeka kwenzwi.
3.4 Kukurukurirana Kwemauto
Nekuda kwekugona kuchinjika kwezvakatipoteredza uye kugadzikana, mafirita ekristaro anoshandiswa zvakanyanya muredhiyo yehungwaru, kutaurirana kwakavanzika, uye masisitimu ekutungamira kuti asangane nezvinodiwa zvekuvanzika kwepamusoro uye kuvimbika kwakanyanya.
4. Kazhinji Frequencies yeCrystal Filters
Akawanda makuru ekushanda ma frequency ekristaro mafirita mumasisitimu ekutaurirana:
Yakajairika Crystal Sefa Frequencies:
|
Application Scenario |
Common Center Frequency |
Tsanangudzo |
|
FM/AM nhepfenyuro inogamuchira |
10.7 MHz |
Inoshandiswa zvakanyanya mumaredhiyo eFM, ine zvakati wandei zvinodiwa zvekusefa chaiko uye mutsara |
|
General communication receiver |
21.4 MHz |
Inowanzo shandiswa yepakati frequency mune yakakwirira-yekupedzisira midziyo yekutaurirana, yakakodzera multi-modhi nzira dzemodhi uye kushandura frequency yepamusoro. |
|
Satellite / radar system |
70 MHz (Intermediate Frequency, IF) |
A common intermediate frequency filter frequency in high-performance communication links, inowanzo shandiswa pamwe chete nedigital down{1}}conversion |
|
Tsika indasitiri/mauto frequency band |
1.40 MHz |
Special frequency point inogadziriswa zvinoenderana nehurongwa hwekugadzira zvinodiwa, zvinowanzowanikwa mukutaurirana kwemauto uye maindasitiri ekutarisa masisitimu |
5. Mhedziso
Crystal mafirita anotora chinzvimbo chakakosha mundima yekutaurirana, kunyanya mune yepakati frequency masaini kugadzirisa, nekuda kwekuita kwavo kwakanaka. Kunyangwe nekusimuka kwehunyanzvi hutsva, nzvimbo dzadzo dzekushandisa dzinogona kutsiviwa mune mamwe mabhendi epamusoro-enguva zhinji, dzichine zvakanakira zvisingatsivike mukutaura nemazvo uye{2}}masisitimu akavimbika. Mune ramangwana, kuburikidza nekuvandudzwa kwezvinhu, diki-kurongedza, uye kubatanidza tekinoroji yedunhu, mafirita ekristaro acharamba achiita basa rakakosha muhurongwa hwekutaurirana.
Kana uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchinge uchingerwa midziyo (senge imwe mhando yewalkie-talkie, radar system, zvichingodaro), HANGJING inogona kukupa mamwe ma frequency ekufananidza kana masevhisi akaunzirwa. Ndapota inzwa wakasununguka kubata yedu HANGJING tekinoroji kana vashandi vekutengesa chero nguva.
