I got this response in LTspice:

The ideal response should look like this:

For example, at 1000Hz it is -15dB when it should be 0dB.

Do you guys have any idea how to fix this?

I also have no idea how can we go from the transfer function to the circuit shown in the first picture I placed here. In the document I found (that has figure 2.5) there's no mention about that, and I can't seem to find anything about it in other places.

I started by doing what is described in the image below.

Some simple calculations were made and I obtained these capacitance values:

The values I placed for the resistors were at random.

Then implemented this in LTspice:

Igot this response:

The ideal response should look like this:

For example, at 1000Hz it is -15dB when it should be 0dB.

Do you guys have any idea how to fix this?

I also have no idea how can we go from the transfer function to the circuit shown in the first picture I placed here. In the document I found (that has figure 2.5) there's no mention about that, and I can't seem to find anything about it in other places.

I started by doing what is described in the image below.

Some simple calculations were made and I obtained these capacitance values:

The values I placed for the resistors were at random.

Then implemented this in LTspice:

Igot this response:

The ideal response should look like this:

For example, at 1000Hz it is -15dB when it should be 0dB.

Do you guys have any idea how to fix this?

I also have no idea how can we go from the transfer function to the circuit shown in the first picture I placed here. In the document I found (that has figure 2.5) there's no mention about that, and I can't seem to find anything about it in other places.

I got this response in LTspice:

The ideal response should look like this:

For example, at 1000Hz it is -15dB when it should be 0dB.

Do you guys have any idea how to fix this?

I also have no idea how can we go from the transfer function to the circuit shown in the first picture I placed here. In the document I found (that has figure 2.5) there's no mention about that, and I can't seem to find anything about it in other places.