Background of Multi-band Microwave Circuit.- Analysis of Resonator based
on the Microstrip Line.- Multi-band Bandpass Filter with High
Selectivity.- Reflectionless Multi-band BPF with Reused Resonances.-
Slotline based Multi-band Balun Filter.- High Suppressed Balanced
Filter.- Switchable Filtering Diplexer based on Reused L-shape
Resonator.- Conclusion.