| US 7,532,861 B2 | ||
| Connection interface for conveying RF, data, and power between electronic devices | ||
| Craig Steven Ranta, Redmond, Wash. (US); and Wayne King, Stirling (Australia) | ||
| Assigned to Microsoft Corporation, Redmond, Wash. (US) | ||
| Filed on Dec. 23, 2004, as Appl. No. 11/20,995. | ||
| Prior Publication US 2006/0139833 A1, Jun. 29, 2006 | ||
| Int. Cl. H04B 7/24 (2006.01) | ||
| U.S. Cl. 455—39 [455/45; 455/42; 361/113; 370/395; 370/488; 370/490] | 19 Claims |
| 1. A method for conveying a plurality of different types of signals between two devices over a radio frequency (RF) cable
having a single conductor with a shield, wherein the plurality of different types of signals range in frequency from a direct
current (DC) signal to an RF signal, comprising the steps of:
(a) at the device where any of the plurality of different signals are provided to be conveyed to the other device, coupling
each such signal to the RF cable through an associated filter, said associated filter having frequency and impedance characteristics
that pass only the signal input to the associated filter and substantially excludes all other of the signals, such that the
DC signal is coupled to the RF cable through a low pass filter at the device from where the DC signal is provided;
(b) conveying the plurality of different signals over the RF cable to whichever of the two devices that will be using the
signals; and
(c) at the other device that will be receiving each specific signal of the plurality of signals, coupling the RF cable to
a corresponding one of a plurality of different filters that is characterized by passing only said specific signal and substantially
excluding all other of the signals, such that the RF cable is coupled to another low pass filter at the other device receiving
the DC signal, wherein an output of the low pass filter comprises an electrical power signal that is employed to energize
components on the other device receiving the DC signal.
|