• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 16 subscribers
  • Views 579 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Help: Is there any formula to describe the relationship between the Effective Radiated Power (ERP) or ERIP of the antenna and RSSI in C2500?

Xu Meng
Prodigy 50 points

I am working on Ez430rf2500 development tool for my research work.  I am wondering if this % data on RSSI can be related to the Effective Radiated Power (ERP) or Effective Isotropic Radiated Power (ERIP) of the antenna. If yes, is there anyone knowing the information or formula on this relationship between ERP and signal strength? 

I am really beginning in this area. Thanks for the reply and help

 

  • 0
    TI__Mastermind 33170 points

    Hi,

    The RSSI is the Received Signal Strength Indicator on the receiving side; the RSSI scale is related to the strength of the radio signal usually in dBm. The ERP is a measure of the radiated power from the transmitter. The radiated power is primarily dedicated by the power configuration of the transmitter, the matching to the antenna and the actual quality of the antenna itself.

    ERP is most commonly used to determine the quality of an antenna. For example: if 0dBm is entered into an antenna (AUT) via a SMA 50 ohm connection point via a signal generator and the effective radiated power is measured in a chamber's antenna would be 0dBm; then the antenna efficiency would be 100%.

    Recommend to read AN058 (http://www.ti.com/litv/pdf/swra161b) which describes in more detail about the antenna properties and DN018 (http://www.ti.com/litv/pdf/swra169a) which explains the effective range that can be achieved.

    Regards,

       Richard.

  • 0 in reply to RGW
    Prodigy 50 points

    Hey Richard,

    Thanks for your patience. It is very useful materials you listed for me.

    Actually we have a special Anttena design for my reseach condition. And we believe it will work bettern than the onchip anttena but other work is still based on the TI development tool board..

    Considering I am working on the development tool - EZ4300RF2500, then I am looking for a way to test these two different versions anttena (On Chip & Lab Own).

    That is why I am thinking if RSSI can indicate the EPR. I know that RSSI = ERP - Pass loss, if I fix the distance and I switch the anttena on the End device (Transmitter side), do you think it is a reasonable to decribe the ERP by the RSSI I value I am reading?

    Thanks

    Xu