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In this paper, a kind of double-layer microstrip antenna is designed. It overcomes main shortcoming of general microstrip patch antenna with narrow SWR bandwidth. On dielectric-slabs with same permittivity and thickness, it's SWR bandwidth is wider than general microstrip patch antenna over 50%. Meanwhile, it is easy for fabrication and applicable to requirements of low profile, wideband. Using HFSS...
In the present work a new numerical model using, the cavity model along with circuit theory has been used to calculate input impedance of a ring resonator loaded by a microstrip line. This type of model has not been investigated yet. A ring resonator is fed by a narrow microstrip line underneath the ring. The proposed structure is analyzed and the input impedance is computed. The computed results...
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