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Size-Reduction and Harmonic-Rejection of Microwave Amplifiers using Spiral-Defected Ground Structure
33rd European Microwave Conference, 2003
A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow-wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduceddoi:10.1109/euma.2003.340888 fatcat:jlvbhystnba4vjeya35xv6vahy