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MicroPhase / antsdr-fw

ANTSDR Firmware
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Transmit power 2.4GHz and 5GHz #10

Closed HavingaThijs closed 2 years ago

HavingaThijs commented 2 years ago

I am using the ANTSDR E310 with openwifi. According to the system_top.v, it is configured for frequencies of 3-6GHz, but the Tx power I measure at 2.4GHz (WiFi channel 6) is even 3dB higher than at 5GHz (channel 44). Do you have an explanation for this?

black-pigeon commented 2 years ago

This could be cuased by the different balun before the signal went into rf switch. The balun for high/low frequency is not the same, the balun at lower frequency have a better performance.

JiaoXianjun commented 2 years ago

Thanks. Could you share us the frequency response (insertion loss) figure of the balun? Or is there a datasheet?

black-pigeon commented 2 years ago

Sure, here are these datasheets BD3150L50100Aand TC1-1-13M+.

Note: TC1-1-13M+ is not the unit mounted on the antsdr PCB, but has similar performance.

HavingaThijs commented 2 years ago

Thanks for sharing the datasheets. It explains the observation.