Terminology Of SAW Filter

A surface acoustic wave is referred to as a SAW filter, and a surface acoustic wave is an elastic wave that propagates along the surface of an object. Let's take a look at its terminology.

1. Nominal frequency: Usually refers to the nominal value of the intermediate frequency, used to make reference frequency relative to the standard.

2. Passband Width: This is a frequency interval and ensures that the relative attenuation at this time is equal to or lower than the specified attenuation value.

3. In-band ripple: This is the maximum difference between the maximum and minimum attenuation between the maximum attenuation in the passband.

4. Stopband Width: Refers to the frequency interval where the relative attenuation is equal to or higher than the specified value.

5. Fixed Attenuation and Bandwidth: This refers to the relative loss and frequency spacing guaranteed in the attenuation bandwidth.

6. Terminal Impedance: This is the source impedance or the load impedance value seen from the filter side. It is usually equivalent to a parallel connection of a resistor and a capacitor.

7. Group delay: it is the differential value of the phase diagonal frequency.

8. Group delay in-band fluctuation: the maximum difference between the maximum and minimum group delays of the group delay in a particular passband width.

We also have Monitor Crystal Clear to provide you with, if you are interested in our product, you can contact us further.