RF connection: 10 U.FL connectors (6 RX, 4 TX)?

Projects LimeSDR
9

@mikos ,@ricsi,

LMS7002M has 3x Rceiver RF inputs and 2x Tx output per channel. By design receiver inputs are tuned as follows:

  • LNAL - from 0.1 MHz to 2000 MHz. Gives a noise figure <2dB.
  • LNAH - from 1500 MHz to 3800 MHz. Gives a noise figure <3dB.
  • LNAW - from 0.1 MHz to 3800 MHz. Gives a noise figure 5-7dB. Usually used for sniffing.

Transmitter output bu design are similar and supported frequency range is form 0.1-3800 MHz.

However, every RF input/output is combined with RF matching network which might be band specific. On the LimeSDR the RF inputs/outputs are tuned for:

  • LNAL - is tuned for 800 - 900 MHz (3GPP Band V).
  • LNAH - is tuned for 1900 MHz (3GPP Band I).
  • LNAW - has broadband matching up to 2000 MHz.
  • TXout1 - is tuned for 2600 MHz (3GPP Band VII) .
  • TXout2 - has broadband matching up to 2000 MHz.

The matching network includes broadband Balun + network for fine tune for specific band, hence can be easily modified.

@ricsi

The LMS7002M synthesizer frequency range is from 30 MHz - 3800 MHz. We are using internal NCO to get us to 100 kHz region.

Best,
Ricardas

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