RF Front-End Design Target Helper

Enter design goals and the tool recommends LNA, mixer, and IF specs using RF system design rules.

Design Targets

Maximum allowable Noise Figure (dB) Minimum required IIP3 (dBm) Minimum required Gain (dB) Pre-LNA Loss (dB) — cable, filter, switch

Results will appear here.

Theory, Guidelines & Block Diagram

RF Transceiver Block Diagram

1. Noise Figure (NF) Targeting

NF_total = NF_LNA + (NF_mixer - 1)/G_LNA + …

2. Linearity Targeting

1/IIP3_total = 1/IIP3_1 + G1/IIP3_2 + …

3. Gain Distribution

LNA should provide enough gain to suppress mixer NF, but not too much to destroy linearity.