How to improve the poor insertion loss and return loss of the network transformer？

The following methods are commonly used to improve poor insertion loss and return loss during the production of network transformers:

1. Reduce the length of the wire wound on the coil,

There are several ways to deal with this,

a, reduce the circle,

b, try to distribute evenly at 360 degrees,

c, do not have overlapping lines,

d, use a smaller size magnetic ring, etc. ;

2. See bad frequency range,

a, if it is a low frequency band, it is mainly improved by providing inductance,

Methods are

Use a magnetic ring with a higher initial permeability

Increase the twisting degree of twisted wires between primary and secondary,

Or increase the number of windings,

Replace the magnetic ring with a higher AL value;

b, if it is high frequency, it is necessary

Reduce leakage inductance and capacitance, which is the degree of coupling;

3. Of course, the method is far more than this, and many of them have to be summarized through experiments by themselves.

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