2022-08-29 13:56 # 1-dB compression point A figure of merit for the non-linearity of a system. ## Description Effect of gain compression in a nonlinear sys is measured by the point where the input signal level results in a 1dB decrease in the ideal gain. $P_{1dB}$ ![Pasted image 20220829135956](attachments/Pasted%20image%2020220829135956.png#invert) ## Useful formulae ![Pasted image 20220829140040](attachments/Pasted%20image%2020220829140040.png#invert) ![Pasted image 20220829140050](attachments/Pasted%20image%2020220829140050.png#invert) ![Pasted image 20220829140059](attachments/Pasted%20image%2020220829140059.png#invert) ## Measurements P1dB can be measured ## Why does it occur? The voltage/current ratings for elements (even perfectly non-linear elements) will restrict the amount of power that can be handled. Aim to stay away from the maximum value. --- # References [Robabeh's Thesis](High%20Resolution%20Integrated%20Passive%20Phase%20Shifters%20for%20Future%20Wireless%20Communications.md#2%201%202%201%201-dB%20compression%20point)