Low distortion antenna switching circuitry
Abstract:
Antenna switching circuitry includes an antenna node, a number of signal path nodes, and a number of switching elements. Each one of the switching elements is coupled between a different one of the signal path nodes and the antenna node. At least two of the signal path nodes are coupled together in order to form a low distortion node, such that the switching elements between the low distortion node and the antenna node are used to pass a low-distortion radio frequency (RF) signal. By coupling two of the signal path nodes together, a low distortion signal path is created to the antenna. Creating a low distortion signal path using multiple switching elements allows for the size of the switching elements to remain small, which reduces the parasitic capacitance of each one of the switches and therefore the insertion loss of the antenna switching circuitry.
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