Abstract: Miniature multifunctional antennas and related techniques are disclosed that are capable of wide bandwidth operation. In some embodiments, the antennas are capable of being reconfigured in the field for optimal performance in different frequency band configurations (e.g., a single wide instantaneous bandwidth, multiple smaller bands, etc.) and/or for purposes of self healing. In some embodiments, the antennas can be reconfigured in the field to achieve different polarizations (e.g., vertical, horizontal, circular). The antennas can be implemented in a very compact manner making them ideal for use in devices and platforms where size and weight are a concern.

Abstract: Miniature multifunctional antennas and related techniques are disclosed that are capable of wide bandwidth operation. In some embodiments, the antennas are capable of being reconfigured in the field for optimal performance in different frequency band configurations (e.g., a single wide instantaneous bandwidth, multiple smaller bands, etc.) and/or for purposes of self healing. In some embodiments, the antennas can be reconfigured in the field to achieve different polarizations (e.g., vertical, horizontal, circular). The antennas can be implemented in a very compact manner making them ideal for use in devices and platforms where size and weight are a concern.

Abstract: Refractory linings for molten metal containers, e.g. tundishes, are protected by applying thereon first a layer comprising essentially unbonded carbonaceous particulate material and then on top of the first layer a second layer of bonded particulate material.