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This paper presents a new antenna scheme for cognitive radio communication. The antenna structure consists of two ports. The first antenna port is a UWB structure for channel sensing while the second one is a reconfigurable structure for communication. The reconfigurability is based on integrating laser diodes within the antenna substrate in order to activate the photoconductive switches. A prototype...
This paper presents a reconfigurable radio front-end antenna scheme suitable for cognitive radio communications. Our scheme comprises of an UWB antenna structure (antenna-1) and a reconfigurable antenna structure (antenna-2) incorporated together on the same substrate. The UWB antenna-1 is used for channel sensing while the reconfigurable antenna-2 is designed to frequency-hop between pre-determined...
This paper presents a new reconfigurable antenna design using optical switching which overcomes any biasing associated with standard MEMs and PIN switches. In our approach, the switching elements comprises of doped silicon, and the change in the element's RF conductivity from that of a semiconductor material to that of a metal-like material is achieved upon exposure to a laser light coupled through...
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