How to debug the passband of a tunable filter with typical bandwidth？

Ukuze kuqinisekiswe izinhlelo zokusebenza kalula, i-Jingxin ithuthukisa izihlungi eziguqulekayo ukuze iklayenti lizilungise ngokwalo, futhi inikeza isiqondiso sokuyishuna ngokufanelekile njengesibonelo esilandelayo sesihlungi se-VHF.

1. Inqubo yokulungisa kabusha yeisihlungi esingalungisekaI-JX-SF1-152174-215N
Izihlungi ziklanyelwe ukushuna ngaphezu kwebanga le-15 MHz futhi zibe nomkhawulokudonsa ojwayelekile wokudlula ongu-8 MHz.

2. Izisetshenziswa ezidingekayo
Isihlaziyi senethiwekhi esingabonisa ukulahlekelwa kokufaka nokulahlekelwa kokubuyisela.
Ngaphakathi kwe-passband, ukulahlekelwa kokufaka kufanele kube ≤ 1.7dB; ukulahlekelwa kwembuyiselo kufanele kube ≥20dB
Amathuluzi Esandla: isipanela esivulekile esingu-6mm; I-screwdriver eqondile

3. Indlela Yokushuna Kabusha
Le nqubo izochaza inqubo esetshenziselwa iyunithi eshunwe ngaphambilini imvamisa emaphakathi engu-160.3MHz, kanye nebanga lomkhawulokudonsa elingu-8 MHz.
Njengoba kukhonjisiwe kuMfanekiso 1, izikulufu zokushuna i-resonator zikhethwe njenge-F1, F2, F3, F4, kanye ne-F5. Lezi zikulufu zokushuna zinquma imvamisa emaphakathi yesigxobo ngasinye, njengoba izikulufu zokushuna ziya ngaphakathi, imvamisa izoba ngaphansi, kuyilapho izikulufu zokushuna ziphumela ngaphandle, futhi imvamisa izoba phezulu.
I-F12, F23, F34, F45 yizikulufu zokuhlanganisa, lezi zikulufi zinquma umkhawulokudonsa webhendi yokudlula, izikulufu ziya ngaphakathi, futhi zinganweba uhlangothi lwesokudla lwebhande lokudlula, izikulufu eziya ngaphandle zinganciphisa uhlangothi lwesokudla lwebhendi yokudlula.

Umfanekiso 1

Isinyathelo 1: Xhuma isihlungi i-JX-SF1-152174-215N kusihlaziyi senethiwekhi esimisiwe, njengoba kuboniswe kumfanekiso 2.

Umfanekiso 2

Isinyathelo sesi-2:Setha imvamisa emaphakathi edingekayo engu-160.3MHz kanye nomkhawulokudonsa ongu-8MHz

Isinyathelo3:Imvamisa yokuqala engu-160.3MHz±4MHz,imvamisa yokwenqatshwa kwe-Out-of-band 160.3±9MHz kanye no-160.3±14MHz ingabonwa ebangeni lebhendi, njengoba kuboniswe kumfanekiso 3.

Umfanekiso 3

♦Izinyathelo ezilandelayo ziyinqubo yokulungisa iphutha lemvamisa emaphakathi ukusuka ku-160.3MHz ukuya152MHz

1) Imvamisa isuka phezulu iye phansi, ngokulandelana izungeza izikulufu zewashi F1, F2, F3, F4, F5 kuye ku-152MHz ± 4MHz, zonke izikulufu zokulungisa zingena ngaphakathi, imvamisa ye-cavity izoshintsha isuka phezulu iye phansi, i-passband ihamba kwesokunxele.

Umfanekiso wesi-4 ubonisa ushintsho lwesikulufu sokushuna ngakunye okungu-152MHz±4MHz.

Umfanekiso 4

1) Ngemva kokuzungezisa isikulufu sokushuna esingu-F5, qhubeka usebenzisa isipana esingu-6mm khulula kancane inathi; isikulufu sizungezisa izikulufu zokulungisa, lungisa ukulahlekelwa kokubuyisela kube inani elishiwo, Uma ukulahlekelwa kokufaka nokubuyisela kwesokunxele ngakwazi ukufinyelela inani elishiwo, ukulahlekelwa kokufaka nokulahlekelwa kokubuyisela kungancishiswa ngokuzungezisa iwashi noma ngokuphambene newashi izikulufi zokuhlanganisa F12, F23, F34 kanye no-F45, njengoba kuboniswe kumfanekiso 5.

Umfanekiso 5

Umfanekiso wesi-6 uyigrafu ephelele yemvamisa yesikhungo ku-152MHz; i-bandwidth engu-8MHz

Umfanekiso 6

♦Izinyathelo ezilandelayo ziyinqubo yokususa iphutha ye-central frequency kusuka160.3MHzku174MHz

1) Imvamisa isuka phansi iye phezulu, ngokulandelana izungezisa izikulufu zewashi F1, F2, F3, F4, F5 kuya ku174MHz±4MHz, zonke izikulufu zokulungisa ziya ngaphandle, imvamisa yomgodi izoshintsha isuka phansi iye phezulu, i-passband iyanyakaza. Ngakwesokudla.

Umfanekiso 7 ubonisa ushintsho lwesikulufu sokushuna ngakunye okungu-174MHz±4MHz

Umfanekiso 7

2）Ngemva kokuzungezisa isikulufu sokushuna F5, qhubeka usebenzisa isipana esingu-6mm khulula kancane inathi; isikulufu sizungezisa izikulufu zokushuna, lungisa ukulahlekelwa kokubuyisela kunani elishiwo, Uma ukulahlekelwa kokufaka nokulahlekelwa kokubuyisela kungakwazi ukufinyelela inani elishiwo, ukulahlekelwa kokufaka kanye ukulahlekelwa kokubuyisela kungancishiswa ngokuzungezisa iwashi noma ngokuphambene newashi izikulufi zokuhlanganisa F12, F23, F34 kanye no-F45, njengoba kuboniswe kumfanekiso 8.