topic Re: [MC13213 - NCB] External antenna in 8-bit Microcontrollers

[MC13213 - NCB] External antenna

CecchiSandrone — Tue, 27 Nov 2007 02:00:38 GMT

I want to increase the transmission range of the board 13213-NCB. I tried to attach a WLAN 2.4 GHz antenna to the plug but I can't see some benefits. May I must enable somewhere via software this type of antenna module or it isn't the right one?

Re: [MC13213 - NCB] External antenna

Spell — Tue, 27 Nov 2007 16:06:42 GMT

Hi Cecchi,
there is no module to enable via software. Are you sure that antenna have the right connector? is SMA or reverse SMA? Take a look to the connectors and check if there is the hot pole inside the plug.

regards,
Filippo

Re: [MC13213 - NCB] External antenna

Spell — Tue, 27 Nov 2007 16:10:47 GMT

P.S.
Have you change the position of R111? If you take a look on schematic you can see for enable the external antenna you must move R111 in the R112 location.

Re: [MC13213 - NCB] External antenna

CecchiSandrone — Tue, 27 Nov 2007 16:24:53 GMT

Attached you can see antenna and plug...there isn't an hot plug so the antenna is wrong. Where did you find schematics for 1321-NCB?

P1010017.jpg

P1010018.jpg

Message Edited by t.dowe on 2009-10-27 01:26 PM

Re: [MC13213 - NCB] External antenna

CecchiSandrone — Tue, 27 Nov 2007 16:32:14 GMT

Ah ok I found in my docs. However, It looks strange that to use an external antenna I must modify the board
Is it only a jumper? I don't understand where is...I don't see it on the board.

Message Edited by Cecchi Sandrone on 2007-11-27 09:47 AM

Re: [MC13213 - NCB] External antenna

Spell — Tue, 27 Nov 2007 16:47:07 GMT

You can use your WLAN antenna inserting manually a hot pole within the plug

I have attached the MC13213-NCB file.

1321xncb.zip

Message Edited by t.dowe on 2009-09-22 11:43 AM

Re: [MC13213 - NCB] External antenna

CecchiSandrone — Tue, 27 Nov 2007 16:53:53 GMT

Unfortunately, I don't have a hot pole here...I must buy a "male" antenna. However, I don't understand this statement on the docs: "For RF measurements or for evaluating other antennas, connector J100 (SMA) can be enabled by moving a 0 Ohm jumper."

Re: [MC13213 - NCB] External antenna

Spell — Tue, 27 Nov 2007 17:02:14 GMT

For 0 ohm jumper is intended the 0 ohm resistor... you must move this resistor (R111) for enable the SMA connector.

You can made an hot pole using a piece of resistor terminal. I have made therefore

Re: [MC13213 - NCB] External antenna

CecchiSandrone — Tue, 27 Nov 2007 17:23:04 GMT

So I must unweld R111 and move to the arrow position...
Obviously is it impossible to use both antennas together?

Message Edited by Cecchi Sandrone on 2007-11-27 10:25 AM

P1010020_copia.jpg

Message Edited by t.dowe on 2009-09-22 10:49 AM

Re: [MC13213 - NCB] External antenna

Spell — Tue, 27 Nov 2007 18:34:14 GMT

Yes, it's impossible