How is IP3 calculated?
IP3 can be determined by applying 2 equal power monotones and measuring a fundamental power and a 3rd order power (either 2f2-f1 or 2f1-f2) at the output. Then apply these measured values to Equation 4.
What is intermodulation product?
The intermodulation products are spurious frequency components generated when two or more signals pass through a non-linear device. The intermodulation products can be of different orders, such as second-order or third-order, depending on the non-linearity, number, and frequency of signals present in the system.
What is IP3 amplifier?
The IP3 value is an imaginary point that indicates when the amplitude of the third-order products equals the input signals. This point is never reached, as the amplifier will saturate before this condition can occur. Nevertheless, it is a good indicator of amplifier linearity.
How can intermodulation products be prevented?
How to prevent Intermodulation
- Use high quality components and avoid non-linear active components in design of devices.
- Operate power amplifiers in linear range to avoid intermodulation components.
- Avoid low quality mechanical switches and poor contact signal adaptors.
What is IP3 measurement?
You must have a better part than the DUT within the test equipment to measure the DUT. As a precaution, we can filter the input of the spectrum analyzer to prevent high order harmonics from mixing within the spectrum analyzer. 21. IF output spectrum of the MM1-0312HS with the block diagram setup from figure 18.
What is IIP3 and OIP3?
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 the definition of Third Order Intermodulation?
The definition of the third-order intermodulation given in equation 9 is the same as for tones used to describe intermodulation distortion in narrowband analysis. Three sequences describe the frequency sum products. The first and last sum products are unique where the first product location is given by equation 10,
How are intermodulation products calculated in a calculator?
The calculator calculates IMD (Intermodulation) products based on two fundamental frequencies. In the same way IMD products can be found for more than two frequency inputs.
How to calculate third order intercept point ( IP3 )?
1. Select calculation, IP3 or IM3 products. 2. Enter the levels and frequencies if required, then press the Calculate button to compute the third order intercept point (IP3), or the IM3 products. The yellow boxes indicate results and are read only.
What are the products of intermodulation distortion called?
These products are called as IMD (Intermodulation distortion) products. Let us understand, IP3 products IM3_low and IM3_high and OIP3 as shown in the IMD curve (with slope 3) below.