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Defected ground structure (DGS) consisting of 2 I‐shaped etched‐out patterns underneath a microstrip line with an inverted L‐shaped stub is proposed to suppress all higher harmonics up to fourth harmonic of an inset cut microstrip patch antenna. The overall size of the proposed DGS and the position of the stub are optimized to achieve wide stop‐band characteristics. All the higher order harmonics...
In this paper a microstrip line fed inset cut rectangular shaped patch antenna for controlling higher order modes up to fourth harmonic of the fundamental frequency is demonstrated successfully. Complete harmonic rejection has been achieved by using two simple I-shaped DGS beneath the feed line. Rejection characteristics are improved by adding one inverted L-shaped stub with the feed line. DGS's stop...
In this paper a novel structure is proposed to reduce the mutual coupling between two coplanar microstrip antennas which resonates at the same frequency band. A simple string of H-shaped DGS is placed in between two antennas to reduce the mutual coupling. Simulated result shows that the reduction of mutual coupling up to 50dB is achieved without affecting the radiation behavior of the antennas.
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