Kaviri mativi pcb bhodhi prototype FR4 TG140 impedance inodzorwa PCB

Mabhodhi edunhu ane inodzorwa impedance ane anotevera maitiro:

1. Kunyatsodzora maitiro ekugadzira bhodhi redunhu, kusanganisira kusarudzwa kwezvinhu, kudhindwa wiring, layer spacing, nezvimwe, kuve nechokwadi chekugadzikana kweiyo impedance yedunhu;

2. Shandisa chaiyo PCB maturusi ekugadzira kuti ave nechokwadi chekuti impedance inosangana nezvinodiwa zvekugadzira;

3. Muchikamu chePCB yose uye nzira, shandisa nzira yakapfupika uye kuderedza kukotama kuti uone kugadzikana kwe impedance;

4. Kuderedza kuyambuka pakati pemutsara wechiratidzo uye mutsara wemagetsi uye mutsara wepasi, uye kuderedza kupindirana uye kupindira kwemutsara wechiratidzo;

5. Shandisa inofananidza impedance tekinoroji pane yakakwirira-yekumhanyisa chiratidzo chekufambisa mutsara kuti uve nechokwadi chekuchena uye kugadzikana kwechiratidzo;

6. Shandisa interlayer yekubatanidza tekinoroji kuderedza coupling ruzha uye electromagnetic mwaranzi;

7. Zvinoenderana neyakasiyana impedance zvinodiwa, sarudza iyo yakakodzera layer ukobvu, mutsara upamhi, mutsara spacing uye dielectric nguva dzose;

8. Shandisa chaiyo bvunzo chiridzwa kuita impedance bvunzo pane redunhu bhodhi kuti uone kuti iyo impedance paramita inosangana nezvinodiwa zvekugadzira.

Sei zvakajairwa impedance control ichingove 10% kutsauka?

Shamwari zhinji dzinovimba chaizvo kuti iyo impedance inogona kudzorwa kusvika ku5%, uye ini ndakatonzwa nezve 2.5% impedance inodiwa. Muchokwadi, iyo impedance yekudzora maitiro ndeye 10% kutsauka, zvishoma kuomarara, inogona kuwana 8%, pane zvikonzero zvakawanda:

1, kutsauka kwemidziyo yeplate pachayo

2. Etching kutsauka panguva PCB kugadzirisa

3. The iation of flow rate inokonzerwa nelamination panguva yePCB processing

4. Pakumhanya kwakanyanya, iyo roughage yemhangura foil, PP girazi fiber effect, uye DF frequency variation effect yemedia inofanirwa kunzwisisa iyo impedance.

Ndekupi mapuranga edunhu ane impedance zvinodiwa anowanzo shandiswa?

Mabhodhi edunhu ane impedance zvinodiwa anowanzo shandiswa kune yakakwira-kumhanya chiratidzo chekufambisa, senge yakakwira-kumhanya dhijitari chiratidzo chekufambisa, radio frequency signal transmission uye millimeter wave chiratidzo chekufambisa. Izvi zvinodaro nekuti iyo impedance yedunhu bhodhi ine hukama nekumhanya kwekufambisa uye kugadzikana kwechiratidzo. Kana iyo impedance dhizaini isinganzwisisike, inokanganisa kutapurirana kwechiratidzo uye kunyange kukonzera kurasikirwa kwechiratidzo. Naizvozvo, muzviitiko zvinoda yakakwirira chiratidzo chekufambisa mhando, zvinowanzodikanwa kushandisa mabhodhi edunhu ane impedance zvinodiwa.