Mak bilong abrusim
Wantaim bikpela selektiviti, bikpela stebiliti, na liklik lus bilong putim, Crystal Filter i save mekim bikpela wok tru insait long ol moden komunikesen sistem. Dispela atikol i kamapim ol as wok na ol straksa bilong ol kristal filta, na i lukluk long skelim ol wok bilong ol long ol komyunikesen sabsistem olsem waiales komyunikesen, redio na televisen, na ol reda sistem, na las tru i toktok long ol divelopmen trent bilong ol na ol salens ol i bungim.
1. Tok i go pas
Insait long ol kain kain ilektronik komunikesen sistem, ol filta em i wanpela bikpela samting long wok bilong prosesim ol signal, na ol i save yusim long makim frikwensi ben we ol i laikim na daunim nois na intaferens. Taim 'communication spectrum' i wok long pulap, ol i putim ol bikpela samting long mekim wok bilong ol filta.
2. Wok Prinsipel na Pasin bilong ol Kristal Filta
2.1 As tingting bilong wok
Ol kristal filta i yusim 'piezoelectric effect' na 'mechanical resonance characteristics' bilong ol 'quartz crystals' long kisim 'frequency selectivity'. Wanpela 'quartz crystal' i gat bikpela 'resonans' bekim long wanpela 'frequency', na dispela 'resonans' inap long kamapim wanpela 'band-pass' o 'band-stop filter' long rot bilong 'circuit design', we ol i save yusim long stretim o daunim ol signal insait long wanpela 'frequency band'.
2.2 Ol bikpela samting
Bikpela Q-fakta: Kwaliti fakta bilong ol 'quartz crystals' inap long 104~106, we i antap tru long ol nomol LC seket;
Bikpela selektiviti: Em inap long filtim gut insait long wanpela liklik 'bandwidth', we i gutpela long mekim 'precision intermediate frequency' (IF) skrining;
Gutpela frikwensi stebiliti: Tempereja na taim i no inap bagarapim tumas, na dispela i mekim na ol komunikesen sistem i stap gut longpela taim;
Liklik sais na gutpela wok: Em i gutpela long ol 'embedded system' na ol 'high-density integrated circuits'.
3. Ol wok bilong ol kristal filta insait long wok bilong toktok
3.1 Ol Waiales Komyunikesen Sistem
Insait long ol redio transiva, ol i save yusim ol kristal filta long taim bilong 'signal filtering' long 'intermediate frequency level' (olsem 10.7 MHz). Ol aplikesen we ol i save yusim em:
Singel-Saitben (SSB) komunikesen: Ol i save yusim long daunim ol piksa frikwensi na ol giaman signal;
Ol 'amateur radio': Gatim stret 'channel' bilong helpim 'sensitivity';
Mobail komunikesen: Olsem ol 'early intermediate frequency riceving modules' insait long ol sistem olsem GSM na CDMA.
3.2 Setelait na Reda Komyunikesen
Insait long ol 'radar' na 'satellite ground station' sistem, ol i save yusim ol 'crystal filter' long ol 'front-end' 'filtering modules' bilong ol 'receiving channels', moa yet long ol 'intermediate frequency filtering' na 'pulse compression' sistem, na dispela i save mekim wok long daunim '-interference na kamapim gutpela resolusen.
3.3 Redio na Televisen
Long 'amplitude modulation' (AM) na sot-wev brodkas risiva, ol i save yusim ol 'crystal filter' long 'intermediate frequency amplification stage', we inap long givim gutpela 'channel spacing identification' na 'adjacent frequency suppression' pefomens, na mekim gutpela krai.
3.4 Militeri Komyunikesen
Bikos em i gutpela long senisim na stap gut long envairomen, ol i save yusim ol 'crystal filter' long ol 'tactical radio', 'encrypted communication', na 'guidance systems' bilong inapim ol samting we i mas i gat bikpela konfidensiel na gutpela 'reliability'.
4. Ol Komon Frekwensi bilong ol Kristal Filta
Sampela bikpela wok frikwensi bilong ol kristal filta insait long ol komunikesen sistem:
Ol Komon Kristal Filta Frekwensi:
|
Aplikesen Senario |
Komon Senta Frekwensi |
Diskripsen |
|
FM/AM brodkas risiva |
10.7 MHz |
Ol i save yusim planti long ol FM redio, wantaim ol bikpela samting bilong 'filtering precision' na 'linearity' |
|
Jeneral komunikesen risiva |
21.4 MHz |
Wanpela 'intermediate frequency' we ol i save yusim planti taim insait long ol 'high-end' komunikesen ikwipmen, we i gutpela long ol 'multi-mode modulation methods' na 'higher frequency conversion' |
|
Setelait/reda sistem |
70 MHz (Intermediate Frequency, IF) |
Wanpela komon intamediet frikwensi filta frikwensi insait long ol hai-pefomens komunikesen link, ol i save yusim wantaim dijitel daun-konvesen |
|
Kastom indastriel/militeri frikwensi ben |
1.40 MHz |
Ol i save stretim ol spesel frikwensi poin bihainim ol samting bilong sistem disain, we planti taim ol i save painim long ol ami komyunikesen na indastrial monitoring sistem |
5. Pinis
Ol 'crystal filter' i gat bikpela wok insait long wok bilong toktok, moa yet long wok bilong prosesim ol 'intermediate frequency signal', bikos ol i wok gut tru. Maski wantaim kamap bilong ol nupela teknoloji, ol aplikesen fil bilong ol i ken senis long sampela hai-frikwensi ben, ol i gat ol gutpela samting yet long stretpela komunikesen na hai-reliabiliti sistem. Long bihain taim, long rot bilong stretim ol samting, 'micro-packaging', na wok bung wantaim 'integrated circuit' teknoloji, ol 'crystal filter' bai wok yet long mekim bikpela wok insait long ol 'communication systems'.
Sapos yu gat ol samting yu nidim long sampela samting (olsem wanpela kain 'walkie-talkie', 'radar system', na ol narapela samting), HANGJING inap long givim yu ol sevis bilong makim ol 'frequency' o ol sevis we yu laikim. Plis yu ken toktok wantaim ol teknikel o sels wokman bilong mipela long HANGJING long wanem taim yu laikim.
