SMA Antennas

[George Sephton]

Hi,
I'm currently building a PCB and on it will be a 433mhz and transmitter module.
I was just wondering if there was anything special about the pcb, any requirements? Like chip antennas don't work as well with a ground plate, thinks like that.
Thanks,
George.

EDIT: Just out of interest will this antenna work with a 433mhz transmitter and receiver, as it also says GSM and GPRS on the description...?

 

[eclectic]

Hi,
I'm currently building a PCB and on it will be a 433mhz and transmitter module.
I was just wondering if there was anything special about the pcb, any requirements? Like chip antennas don't work as well with a ground plate, thinks like that.
Thanks,
George.

EDIT: Just out of interest will this antenna work with a 433mhz transmitter and receiver, as it also says GSM and GPRS on the description...?

@George

See, for example
http://www.radiometrix.co.uk/apps/apnt000.htm

from post #5
http://www.picaxeforum.co.uk/showthread.php?t=12974&highlight=zizka


What's your application?

Giving more information,
might help you to receive more information

e

 

[russbow]

George, the thing to remember is that any track connected to the TX output pin becomes part af the antenna. Have a look at the attached PDF. A quarter wave whip can be fed with 50 ohm co-ax. Ideally I would add three 17cm radials at 120 deg apart, and bend them down about 40 deg to lower the feed point impedence. Unfortunatly, measuring SWR at these frequencies is impossible without specialist test equipment.

I've said it before, try googling "J Pole" and "Slim JIm". I have had some good results with these at 70 cm.

Russ