Abstract: Various circuits, systems, methods, and apparatus are disclosed to provide dynamic direct current (DC) level shifting for use with a summing component of a quad channel detector (QCD) of a media scanning system configured to detect carbon voids or other defects on the surface of a magnetic recording medium. In an example, a summing circuit receives separate input signals from four optical sensors of the scanning system and generates a summed output signal with an alternating current (AC) component representative of a defect and a direct current (DC) component representative of a total power of an optical transmitter of the scanning system. A DC level shifting circuit receives a fixed DC offset signal and the same four variable input signals. The DC level shifting circuit provides dynamic level shifting of the DC component of the summed output signal based on the fixed DC offset and the four input signals.

Abstract: Methods and systems are presented for evaluating performance of a finite or infinite antenna array including a finite number of antennas. Typically, a model is generated for the antenna array, the model including an arbitrarily large antenna array with an arbitrarily large number of model antennas. Each model antenna has features defined by features of antennas of the finite or infinite antenna array. A unit cell is determined for the arbitrarily large antenna, and impedance matrices Zantenna and Zperiodic are computed, Zperiodic representing interactions among the unit cell and the other model antennas. From these matrices, the performance of the finite or infinite antenna array is assessed.

Abstract: Methods and systems are presented for evaluating performance of a finite or infinite antenna array including a finite number of antennas. Typically, a model is generated for the antenna array, the model including an arbitrarily large antenna array with an arbitrarily large number of model antennas. Each model antenna has features defined by features of antennas of the finite or infinite antenna array. A unit cell is determined for the arbitrarily large antenna, and impedance matrices Zantenna and Zperiodic are computed, Zperiodic representing interactions among the unit cell and the other model antennas. From these matrices, the performance of the finite or infinite antenna array is assessed.

Abstract: Embodiments of the invention disclose a method and a system configured to exchange energy wirelessly, comprising a structure configured to exchange the energy wirelessly via a coupling of evanescent waves, wherein the structure is electromagnetic (EM) and non-radiative, and wherein the structure generates an EM near-field in response to receiving the energy; and a controller configured to tune up the structure such that the near-field is generated according a particular energy distribution pattern.

Abstract: A system exchanges energy wirelessly and includes a source configured to generate evanescent waves, in response to receiving the energy, on at least part of a surface of the source. The system also includes a sink configured to receive the energy wirelessly from the source via a coupling of the at least part of the evanescent waves and a load configured to receive the energy from the sink. The load and the sink are configured to move along the surface of the source such that the at least a part of the evanescent waves are coupled between the source and the sink within an energy transfer area.

Abstract: Embodiments of the invention disclose a method and a system configured to transfer energy wirelessly, comprising: a source configured to generate evanescent waves, in response to receiving the energy, on at least part of a surface of the source; a sink configured to receive the energy wirelessly from the source via a coupling of the at least part of the evanescent waves; and a load configured to receive the energy from the sink, wherein the load and the sink are configured to move along the surface of the source such that the at least a part of the evanescent waves are coupled between the source and the sink within an energy transfer area.

Abstract: Embodiments of the invention disclose a method and a system configured to transfer energy wirelessly, comprising a source configured to transfer the energy wirelessly to a sink via a coupling of evanescent waves, wherein the source generates an electromagnetic (EM) near-field in response to receiving the energy; and an energy relay arranged such that to increase the coupling between the source and the sink, wherein the source, the sink, and the energy relay are electromagnetic and non-radiative structures.

Abstract: Embodiments of the invention disclose a system configured to exchange energy wirelessly. The system includes a structure configured to exchange the energy wirelessly via a coupling of evanescent waves, wherein the structure is electromagnetic (EM) and non-radiative, and wherein the structure generates an EM near-field in response to receiving the energy; and a negative index material (NIM) arranged within the EM near-field such that the coupling is enhanced.

Abstract: The present invention includes compositions, methods and systems for analyzing one or more cell characteristics including the steps of depositing one or more spots on a substrate that include one or more cells from a strain collection, contacting the one or more cells with one or more agents and evaluating optically effect of the agent on the one or more cells.