Abstract: The invention provides a method to compute the mixed potential contributions to electric and magnetic field in multilayered media, which can be applied in microwave engineering, integrated circuit analysis, and remote sensing. The Spectral Differential Equation Approximation Method (SDEAM) for solving Michalski-Zheng's mixed-potential Green's functions in fully shielded, partially open, and fully open multilayered media are described. The main advantage of SDEAM over other methods is that for a fixed location of the source elevation z?, it does not require fitting from scratch for every z, z?, and ? combination. Because of this advantage, SDEAM can be superior in both performance and accuracy to other existing methods. The well-established boundary value problem numerical solvers also provide SDEAM with robustness for miscellaneous planar multilayered structures.

Abstract: A method for extending the range of isochronous USB data transfer, by providing a local extender and a remote extender, coupled respectively to the USB host and the USB device, and coupled to each other via a non-USB cable. After receiving a first In-token from the host, the local extender transmits a first data packet to the host, which contains a data payload having a non-zero length; the data is either generated by the first extender, or previously received from the USB device and stored in a buffer. The local extender forwards the first In-token to the USB device via the remote extender; in response, the USB device generates a second data packet containing requested data and transmits it to the local extender via the remote extender. The local extender stores the second data packet and transmits it to the host in response to a second In-token from the host.

Abstract: A method for extending the range of isochronous USB data transfer, by providing a local extender and a remote extender, coupled respectively to the USB host and the USB device, and coupled to each other via a non-USB cable. After receiving a first In-token from the host, the local extender transmits a first data packet to the host, which contains a data payload having a non-zero length; the data is either generated by the first extender, or previously received from the USB device and stored in a buffer. The local extender forwards the first In-token to the USB device via the remote extender; in response, the USB device generates a second data packet containing requested data and transmits it to the local extender via the remote extender. The local extender stores the second data packet and transmits it to the host in response to a second In-token from the host.