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RF Transmitter Schematic

RF Transmitter Schematic

The RF transmitter stage takes the I/Q modulated signal as input and outputs the signal mixed with the carrier wave, amplified and filtered. Here is the left side of the RF Transmitter schematic:

This part of the RF transmitter contains the following elements, two from the System nonlinear RF library and one from the Nexxim component library:

• An amplifier from the System nonlinear RF library provides a 10dB gain.

• A mixer from the System nonlinear RF library mixes the LO frequency (9GHz) with the upshifted data around 1GHz.The mixer adds a conversion gain from RF (in) to IF(out) of 5dB and a noise figure of 6dB.

• Athird-order Chebyshev bandpass filter from the Nexxim component library. The filter is set to pass frequencies between 9GHz and 11GHZ with a maximum inband ripple of 0.5dB.

Here is the right side of the RF Transmitter schematic:

This part of the RF transmitter contains the following elements, one from the System nonlinear RF library and one from the Nexxim component library:

• Another amplifier from the System nonlinear RF library provides a 10dB gain postfilter.

• A fifth-order Chebyshev bandpass filter from the Nexxim component library. The filter is set to pass frequencies between 9.5GHz and 10.5GHZ, this time with a maximum inband ripple of 0.05dB.

• A system probe, channel, is inserted to enable you to view the output of the RF transmitter.

• An adjacent channel power ratio probe, ch_acpr, is inserted to enable you to view the in-band and out-of-band power outputs from the RF transmitter.

• An average power probe, avg_in, is inserted to enable you to view the average output power from the RF transmitter.

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