What is OIP3 in RF?

The terms IIP3 and OIP3 stands for Input Third Order Intercept Point and Output Third Order Intercept Point respectively. Introduction: When two or more than two signals are mixed in nonlinear component whether active or passive, other signals get generated as a result of product of these original signals.

What is P1dB and IP3?

There are two key measurements in determining power amplifier quality, efficiency, and linearity: the third-order intercept (abbreviated TOI or IP3) point and the 1-dB compression (P1dB) point. These quantities allow you to evaluate and compare amplifier specifications and performance.

What is OIP3 in amplifier?

Amplifier linearity is most often characterized by the 3rd order output intercept point (OIP3)—the hypothetical point where the power of the IM3 products intersects the fundamental power. The LTC6431-15 exhibits very small IM3 products and thus its OIP3 is very good.

What is IIP3 measurement?

IP3 is not a directly measured mixer parameter like conversion loss, return loss, or isolation. IP3 is a figure of merit of device linearity based on the relationship between a 2-tone analytic signal and its resulting self-intermodulation terms.

Why is IP2 important?

The second order intercept point (IP2) of a direct conversion receiver system is a critical performance parameter. It is a measure of second order non-linearity and helps quantify the receiver’s susceptibility to single- and 2-tone interfering signals.

Why is OIP3 important?

In transmitter chain Output Intercept point is measured (OIP3) or plays an important role in case of multi-carrier system. In LTE system, one carrier is generated, so OIP3 is less important. In LTE Advanced, due to carrier aggregation, multiple carriers are generated, so OIP3 in that case matters.

How is OIP3 measured?

The output power when the two powers would be equal is called the output third-order intercept point (OIP3). Thus measuring the output level, P1 (dBm) and the relative level of the third-order product, 2Δ = 1− 3 (dB) allows us to compute OIP3 as 1 + Δ.

What is IP3 mixer?

Third Order Intercept Point (IP3) When two RF signals of equal amplitude arrive at the input of a mixer, intermodulation frequencies are generated due to the non-linearity of the mixing device.

What is 3rd order intermodulation?

3rd order intermodulation products (D3 and D4) are the result of nonlinear behavior of an amplifier. The input power level into the amplifier is increased by 1 dB in each successive frame.

What is IIP3 in mixer?

using a highside LO. IIP3 is input referred IP3 and OIP3 is output referred. This can be measured in either an up-conversion or down-conversion and the result of which should be roughly equivalent for the same or similar frequency plan (RF, LO, and IF frequency bands and power levels).