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LNA 60dB D100
#78
Oko oklapanja samog LNA 60dB modula več je @Braca par puta opomnuo, kako je tu, gdje se ima 60dB pojačanja = x1000 V/V
sve delikatno, "smeta ama baš sve", pa treba voditi striktno:

-tačke GNDja i priključivanje fleka Shildinga GNDja po PCBju striktno svaku fleku samo u jednom mestu na GND tačku modula
(tu moram detaljno još pregledati odlično odradjen modul LNA D100 by savan)

-sam externi EMI Shilding cijelog modula, i to sa obe strane modula, oklopom materialom velikog permeabiliteta,
jer samo takav radi EMI Shilding na niskih freq. 
Čelični lim, završni sloj niklovan ili po-tinjen, da se ga može lemiti

@savan je več dao smernice, kako bi to mogli elegantno odraditi,
i stvarno bi tako i odradio!!!
jeftino je, i netreba svakom da traži tanak čelični lim, pocinkan i na kraju još niklovan ili po-tinjen
pa sečenje...itd
Uzme se več odradjene Shilding Gasket-e, uzme se tačna veličina za več odradjen PCB LNA, ako ima barem približan,
ako ne, odaberemo adekvatnog, pa po njemu odradimo tačne dimenzije LNA PCBja

Na PCBju LNA predvidi se 4 rupe TH metalizirane, !!! od kojih je SAMO JEDNA RUPA GND !!!
ostale 3 vrše samo funkciju pričvrščivanja

Poslije odradjenog plasiranja elemenata, u te 4 rupe stave se neke nogice/pinovi otpornika, kondova, diodica,,,
zalemi se jih na PCB
stavljamo te poklopce/Gasket-e i zalemimo na te nogice i njih, pazimo da se ne dodiruju kojeg elementa i/ili same PCB
nego su na tim nogicama pričvrščene "zračno"

Ovako zamišljam taj "sendvič":

[Image: attachment.php?aid=42458]

EDIT:
-moduli izmedjusobno nesmeju se "električki dodirivati" -> GND loop
-možemo jih poredati sasvim blizu jednog pored drugog,
stavi se izolacija izmedju Shildinga svakog susednjeg modula, da su izolirani medjusobno,
na kraju se jih zalepi popreko i tako jih još mehanički sve učvrstimo
Ovako nekako:

[Image: attachment.php?aid=42459]


Attached Files
.jpg   LNA gasket.jpg (Size: 27,85 KB / Downloads: 107)
.jpg   LNA gasket 4 modul.jpg (Size: 60,19 KB / Downloads: 97)
LP
Dragan
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Messages In This Thread
LNA 60dB D100 - by Dragan100 - 03-02-2024, 06:15 PM
RE: LNA 60dB D100 - by savan - 03-17-2024, 10:33 AM
RE: LNA 60dB D100 - by ronovar - 03-17-2024, 09:20 PM
RE: LNA 60dB D100 - by Majda - 03-21-2024, 09:46 AM
RE: LNA 60dB D100 - by Dragan100 - 03-23-2024, 04:49 PM
RE: PCB Design Routing - by Dragan100 - 03-04-2024, 03:29 PM
LNA 60dB D100 - by Dragan100 - 03-04-2024, 05:14 PM
RE: LNA 60dB D100 - by Dragan100 - 03-04-2024, 05:46 PM
RE: LNA 60dB D100 - by Dragan100 - 03-04-2024, 05:51 PM
RE: LNA 60dB D100 - by Dragan100 - 03-04-2024, 08:56 PM
RE: LNA 60dB D100 - by Dragan100 - 03-04-2024, 09:53 PM
RE: LNA 60dB D100 - by Bocko - 03-05-2024, 08:23 AM
RE: LNA 60dB D100 - by Dragan100 - 03-06-2024, 08:50 PM
RE: LNA 60dB D100 - by ronovar - 03-07-2024, 06:51 AM
RE: LNA 60dB D100 - by savan - 03-07-2024, 08:00 AM
RE: LNA 60dB D100 - by Dragan100 - 03-07-2024, 12:35 PM
RE: LNA 60dB D100 - by Khadgar2007 - 03-07-2024, 08:43 AM
RE: LNA 60dB D100 - by savan - 03-07-2024, 11:49 AM
RE: LNA 60dB D100 - by savan - 03-07-2024, 01:55 PM
RE: LNA 60dB D100 - by ronovar - 03-07-2024, 11:10 PM
RE: LNA 60dB D100 - by Dragan100 - 03-08-2024, 07:31 AM
RE: LNA 60dB D100 - by Khadgar2007 - 03-08-2024, 08:50 AM
RE: LNA 60dB D100 - by savan - 03-08-2024, 11:08 AM
RE: LNA 60dB D100 - by Khadgar2007 - 03-08-2024, 11:46 AM
RE: LNA 60dB D100 - by savan - 03-08-2024, 01:42 PM
RE: LNA 60dB D100 - by Khadgar2007 - 03-08-2024, 03:32 PM
RE: LNA 60dB D100 - by ronovar - 03-08-2024, 03:58 PM
RE: LNA 60dB D100 - by savan - 03-08-2024, 06:15 PM
RE: LNA 60dB D100 - by Khadgar2007 - 03-08-2024, 06:23 PM
RE: LNA 60dB D100 - by Khadgar2007 - 03-08-2024, 06:37 PM
RE: LNA 60dB D100 - by savan - 03-08-2024, 06:51 PM
RE: LNA 60dB D100 - by ronovar - 03-08-2024, 07:18 PM
RE: LNA 60dB D100 - by savan - 03-08-2024, 08:13 PM
RE: LNA 60dB D100 - by Dragan100 - 03-09-2024, 10:56 AM
RE: LNA 60dB D100 - by savan - 03-09-2024, 12:36 PM
RE: LNA 60dB D100 - by savan - 03-09-2024, 03:12 PM
RE: LNA 60dB D100 - by Dragan100 - 03-09-2024, 03:27 PM
RE: LNA 60dB D100 - by savan - 03-09-2024, 04:08 PM
RE: LNA 60dB D100 - by Dragan100 - 03-09-2024, 05:05 PM
RE: LNA 60dB D100 - by savan - 03-09-2024, 07:36 PM
RE: LNA 60dB D100 - by Dragan100 - 03-09-2024, 08:48 PM
RE: LNA 60dB D100 - by savan - 03-09-2024, 10:10 PM
RE: LNA 60dB D100 - by Dragan100 - 03-10-2024, 09:54 AM
RE: LNA 60dB D100 - by savan - 03-09-2024, 11:10 PM
RE: LNA 60dB D100 - by savan - 03-10-2024, 09:57 AM
RE: LNA 60dB D100 - by savan - 03-10-2024, 10:58 AM
RE: LNA 60dB D100 - by Khadgar2007 - 03-10-2024, 11:38 AM
RE: LNA 60dB D100 - by Khadgar2007 - 03-10-2024, 11:41 AM
RE: LNA 60dB D100 - by savan - 03-10-2024, 11:49 AM
RE: LNA 60dB D100 - by Braca - 03-10-2024, 12:38 PM
RE: LNA 60dB D100 - by savan - 03-10-2024, 03:50 PM
RE: LNA 60dB D100 - by Dragan100 - 03-10-2024, 06:30 PM
RE: LNA 60dB D100 - by Braca - 03-10-2024, 06:34 PM
RE: LNA 60dB D100 - by Dragan100 - 03-10-2024, 07:06 PM
RE: LNA 60dB D100 - by savan - 03-10-2024, 08:51 PM
RE: LNA 60dB D100 - by savan - 03-10-2024, 09:19 PM
RE: LNA 60dB D100 - by Dragan100 - 03-10-2024, 09:36 PM
RE: LNA 60dB D100 - by Braca - 03-11-2024, 01:24 PM
RE: LNA 60dB D100 - by savan - 03-11-2024, 01:26 PM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 09:17 AM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 09:56 AM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 10:52 AM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 01:06 PM
RE: LNA 60dB D100 - by savan - 03-12-2024, 03:40 PM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 05:34 PM
RE: LNA 60dB D100 - by savan - 03-12-2024, 03:43 PM
RE: LNA 60dB D100 - by savan - 03-12-2024, 07:22 PM
RE: LNA 60dB D100 - by Dragan100 - 03-12-2024, 09:04 PM
RE: LNA 60dB D100 - by savan - 03-12-2024, 10:19 PM
RE: LNA 60dB D100 - by savan - 03-14-2024, 03:23 PM
RE: LNA 60dB D100 - by Dragan100 - 03-14-2024, 03:32 PM
RE: LNA 60dB D100 - by savan - 03-14-2024, 04:19 PM
RE: LNA 60dB D100 - by Khadgar2007 - 03-14-2024, 06:28 PM
RE: LNA 60dB D100 - by savan - 03-14-2024, 07:19 PM
RE: LNA 60dB D100 - by savan - 03-14-2024, 07:37 PM
RE: LNA 60dB D100 - by Dragan100 - 03-15-2024, 10:07 AM
RE: LNA 60dB D100 - by Dragan100 - 03-15-2024, 11:11 AM
RE: LNA 60dB D100 - by savan - 03-15-2024, 12:14 PM
RE: LNA 60dB D100 - by savan - 03-15-2024, 12:20 PM
Memory input stage - by Majda - 03-16-2024, 08:50 AM
RE: Memory input stage - by Dragan100 - 03-18-2024, 10:50 AM
RE: PCB Design Routing - by ronovar - 03-04-2024, 09:59 PM
RE: PCB Design Routing - by Vlada021 - 03-05-2024, 01:05 PM
RE: PCB Design Routing - by ronovar - 03-05-2024, 08:04 PM
RE: PCB Design Routing - by ronovar - 03-08-2024, 11:08 AM
RE: PCB Design Routing - by ronovar - 03-08-2024, 11:35 PM
RE: PCB Design Routing - by Braca - 03-09-2024, 09:26 AM
RE: PCB Design Routing - by Khadgar2007 - 03-09-2024, 09:55 AM
RE: PCB Design Routing - by Braca - 03-09-2024, 11:10 AM
RE: PCB Design Routing - by Dragan100 - 03-09-2024, 11:31 AM
RE: PCB Design Routing - by ronovar - 03-09-2024, 02:10 PM
RE: PCB Design Routing - by Braca - 03-09-2024, 03:02 PM
RE: PCB Design Routing - by Khadgar2007 - 03-09-2024, 03:05 PM
RE: PCB Design Routing - by ronovar - 03-10-2024, 12:47 PM
RE: PCB Design Routing - by ronovar - 03-11-2024, 12:28 PM
RE: PCB Design Routing - by savan - 03-11-2024, 01:22 PM
RE: PCB Design Routing - by ronovar - 03-11-2024, 02:30 PM
RE: PCB Design Routing - by ronovar - 03-11-2024, 04:06 PM
RE: PCB Design Routing - by Dragan100 - 03-11-2024, 05:19 PM
RE: PCB Design Routing - by Braca - 03-11-2024, 05:53 PM
RE: PCB Design Routing - by ronovar - 03-11-2024, 05:57 PM
RE: PCB Design Routing - by Braca - 03-11-2024, 06:37 PM
RE: PCB Design Routing - by ronovar - 03-12-2024, 03:21 PM
RE: PCB Design Routing - by Braca - 03-12-2024, 04:17 PM
RE: PCB Design Routing - by ronovar - 03-15-2024, 11:19 AM
RE: PCB Design Routing - by ronovar - 03-15-2024, 11:51 AM
RE: PCB Design Routing - by pmiroslav81 - 03-15-2024, 09:25 PM

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