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A novel dual-band ring coupler is proposed in Ridge Substrate Integrated Waveguide (RSIW) technology. The structure is based on two concentric rings with the outer ring loaded by a low insertion loss de-multiplexing scheme allowing independent dual band operation. The RSIW ensures a wide-band fundamental mode operation covering both frequency bands while providing a compact design. A C/K band coupler...
A low profile and dual-band High Inpedance Surface to be used as a Artificial Magnetic Conductor for a GPS antenna is presented here. The two bands designed compelete in simulation and in measure the GNSS characteristics.
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