Q: Ngokuqinisekileyo ukumelana nocingo olufutshane kakhulu lwesekethe kwimpawu yesekethe encinci akubalulekanga?

A: Xa iqela lokuqhuba lishicilelwe Ibhodi PCB yenziwe yabanzi, impazamo yokufumana inzuzo iya kuncitshiswa. Kwimijikelezo ye-analog, kukhethwa ngokubanzi ukusebenzisa ibhendi ebanzi, kodwa uninzi lwabayili bePCB (kunye nabaqulunqi bePCB) bakhetha ukusebenzisa ubuncinci bebhendi ebanzi ukulungiselela ukubekwa komgca wesiginali. Ukuqukumbela, kubalulekile ukubala ukuxhathisa kwebhendi eqhubayo kunye nokuhlalutya indima yayo kuzo zonke iingxaki ezinokubakho.

Umbuzo: Njengoko bekutshiwo ngaphambili malunga nezichasiso ezilula, kufuneka kubekho izinto ezichasayo ezisebenza kakuhle kanye njengoko silindeleyo. Kwenzeka ntoni kwinkcaso yecandelo lecingo?

A: Imeko yahlukile. Ubhekisa kumqhubi okanye ibhendi eqhubayo kwi-PCB esebenza njengomqhubi. Kuba i-superconductors yamaqondo obushushu egumbi ayikabikho, nabuphi na ubude bentsimbi busebenza njengesixhobo sokuxhathisa esisezantsi (esisebenza njenge-capacitor kunye ne-inductor), kunye nefuthe lazo kwisekethe kufuneka ithathelwe ingqalelo.

Yintoni ephosakeleyo ngentambo yePCB

Umbuzo: Ngaba kukho ingxaki ngokwamandla ebhanti eqhubayo enobubanzi obukhulu kakhulu kunye nocingo lwensimbi ngasemva kwebhodi yesekethe eprintiweyo?

A: Umbuzo omncinci. Nangona i-capacitance evela kwiqela lokuqhuba lebhodi yesekethe eprintiweyo ibalulekile, kufuneka ihlale iqikelelwa kuqala. Ukuba oku akunjalo, nokuba ibhendi ebanzi yokuhamba eyenza i-capacitance enkulu ayongxaki. Ukuba kuvela iingxaki, indawo encinci yenqwelomoya yomhlaba ingasuswa ukunciphisa amandla emhlabeni.

Q: Yintoni inqwelo moya?

A: Ukuba ifoyile yobhedu macala onke ebhodi yesekethe eprintiweyo (okanye yonke i-interlayer yebhodi yesekethe eprintiweyo) isetyenziselwa ukuzinza, yile nto siyibiza ngokuba yindiza. Nawuphi na ucingo olucwangcisiweyo luya kucwangciswa kunye nokuchasana okuncinci kunokwenzeka kunye nokunyanzeliswa. Ukuba inkqubo isebenzisa inqwelomoya yomhlaba, kunqabile ukuba ichaphazeleke ngengxolo yomhlaba. Kwaye inqwelo moya inomsebenzi wokukhusela kunye nokusasaza ubushushu.

Umbuzo: Inqwelomoya yomhlaba ekhankanywe apha inzima kumenzi wayo, akunjalo?

A: Kwakukho iingxaki kwiminyaka engama-20 eyadlulayo. Namhlanje, ngenxa yokuphuculwa kwe-binder, ukumelana ne-solder kunye netekhnoloji ye-wave soldering kwiibhodi zesekethe eziprintiweyo, ukwenziwa kweenqwelomoya ezisisiseko kuye kwaba yinto yesiqhelo yeebhodi zesekethe eziprintiweyo.

Q: Uthe akunakulindeleka ukuba inkqubo ibhencwe kwingxolo yomhlaba ngokusebenzisa inqwelomoya. Yintoni ehleliyo yengxaki yomhlaba yengxolo ayinakusonjululwa?

A: Nangona kukho inqwelomoya yomhlaba, ukuxhathisa kwayo kunye nokunyanzeliswa ayizizo zero. Ukuba umthombo wangoku womelele ngokwaneleyo, uya kuchaphazela uphawu oluchanekileyo. Le ngxaki inokuncitshiswa ngokulungiselela ngokufanelekileyo iibhodi zesekethe eziprintiweyo ukuze i-current high ingahambi kwiindawo ezichaphazela umbane womhlaba weempawu ezichanekileyo. Ngamanye amaxesha ikhefu okanye ukusikwa kwindiza yasemhlabeni kungaphambukisa indawo enkulu yomhlaba kwindawo ebuthathaka, kodwa ngokunyanzelwa ukutshintsha inqwelomoya yomhlaba inokuphambukisa umqondiso kwindawo ebuthathaka, ke olo hlobo kufuneka lusetyenziswe ngononophelo.

Q: Ndilazi njani ithontsi levolthi eliveliswe kwinqwelomoya?

A: Ngokwesiqhelo ukwehla kwamandla ombane kunokulinganiswa, kodwa ngamanye amaxesha kunokubalwa ngokujonga ukuxhathisa kwezinto ezomileyo zeenqwelomoya kunye nobude bebhendi ehambayo ehamba ngayo ngoku, nangona ukubalwa kunokuba nzima. Izixhobo zokukhulisa izixhobo zingasetyenziselwa i-voltages kwi-dc ukuya kumaza asezantsi (50kHz). Ukuba umhlaba wesikhulisi wahlukile kwisiseko samandla, i-oscilloscope kufuneka iqhagamshelwe kwisiseko samandla esekethe yamandla esetyenzisiweyo.Izibane ezikhanyisiweyo

Ukuchasana phakathi kwawo nawaphi na amanqaku amabini kwindiza esemhlabeni kunokulinganiswa ngokongeza iprobe kula manqaku mabini. Indibaniselwano yesibonelelo sokukhulisa kunye nobuthathaka be-oscilloscope yenza ukuba ubungakanani bemilinganiselo bufike kwi-5μV / div. Ingxolo evela kwisikhulisi iya kunyusa ububanzi be-wave ye-oscilloscope curve malunga ne-3μV, kodwa kusenokwenzeka ukufezekisa isisombululo esimalunga ne-1μV, eyanele ukwahlula uninzi lwengxolo yomhlaba ukuya kuthi ga kwi-80% yokuzithemba.

Umbuzo: Uyilinganisela njani ingxolo ephezulu yokuhamba komhlaba?

A: Kunzima ukulinganisa ingxolo yomhlaba ye-hf ngesixhobo esisebenza ngobubanzi be-bandband, ke yona i-hf kunye ne-VHF yezixhobo ezifanelekileyo zisebenza ngokufanelekileyo. Iqukethe isangqa esine-ferrite magnetic (ubukhulu obungaphandle be-6 ~ 8mm) kunye neekhoyili ezimbini ze-6 ~ 10 zijika nganye. Ukwenza ifomathi yenguqu ephezulu yokuzahlula wedwa, enye iikhoyili iqhagamshelwe kwigalelo lokuhlalutya umboniso kunye nelinye kwiprojekthi. Indlela yovavanyo iyafana kwimeko yeefrikhwensi ezisezantsi, kodwa i-spectrum analyser isebenzisa ubude beempawu zobungakanani bamaza ukubonisa ingxolo. Ngokungafaniyo neepropathi zedomeyini yexesha, imithombo yengxolo inokuhlukaniswa ngokulula ngokusekwe kwiimpawu zabo zefrikwensi. Ukongeza, ubuntununtunu be-analyzer ye-spectrum ubuncinci yi-60dB ephezulu kunaleyo ye-broadband oscilloscope.