Microwave Devices E511 Lecture 12 Amr Al.Awamry. Agenda Filter design Filter Prototype Impedance and Frequency Scaling LP,HP,BP,SP transformations.

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Presentation transcript:

Microwave Devices E511 Lecture 12 Amr Al.Awamry

Agenda Filter design Filter Prototype Impedance and Frequency Scaling LP,HP,BP,SP transformations

MW Filter design Insertion loss method Power loss ration Insertion loss Reflection coefficient is even function so it can be represented in the form : then

Insertion loss..cont. Maximally flat Equal ripple Called Butterworth filter Called Chebyshev Filter

Filter design procedure Complete system requirement s HPF LPF BPF BRF Passive or Active Specify design method

Filter Prototype

Filter Prototype …cont.

Impedance and Frequency Scaling Now we got Low Pass filter prototype at the required cut of frequency taken into consideration characteristic impedance denormalization

Low-pass to high-pass transformation Bass-pass transformation Series LShunt C

Stop-band transformation Series LShunt C Plz look at ex 8.3, ex 8.4

Transformation Summary