rf amp schematics 600 mw or less

Hi Mark,

Consider the "Australia" legal limit for 433MHz as mandated in the ACMA LIPD (low interference potential devices) standard is 25mW EIRP. Why do you need 600mW? Is the transmitter for Australia?

Information on the LIPD is available from here.

and written in to Australian Commonweath Law here

A part from being used oversea, the only other reason is you have a very lossy antenna (575mW of loss).

==> Hint..... there are other frequencies in the LIPD standard that allow up to 1watt.

Joe

hi, hmmmm max of 25 mw ?? there are " australian appproved " wifi cards in laptops and pcmcia that are 50 mw to 100 mw , i clicked on the link

but cant find anything about the max mw output .

mark k

The best documents regarding Australian RF limits is available from here

WiFi is in the 2400MHz band and it covered by these documents

Item

19 All transmitters 2400-2483.5 10 mW (any type of modulation scheme)

45A Digital modulation transmitters 2400-2483.5 4 W (1.The radiated peak power spectral density in any 3 kHz is limited to 25 mW per 3 kHz. 2. The minimum 6 dB bandwidth must be at

least 500 kHz).

53 Frequency hopping transmitters 2400-2483.5 500 mW (A minimum of 15 hopping frequencies must be used.)

54 Frequency hopping transmitters 2400-2483.5 4 W (A minimum of 75 hopping frequencies must be used)

Regs Joe