Attenuating antenna switch and communication device

摘要

An attenuating antenna switch may be used to suppress increase in the scale and power consumption of an RFIC. The antenna switch has a first terminal, a second terminal, and an antenna terminal coupled to the first and second terminals and configured to be connected to an antenna. The first switch switches between a first state in which a high frequency signal is propagated between the first terminal and the antenna terminal, and a second state in which the high frequency signal is interrupted. A second switch switches between the first and second states between the second terminal and the antenna terminal. The first and second switches are controlled in a mutually exclusive manner such that only one of the two switches can be in the first state at any given time. When in the first state, each switch adjusts an attenuation amount of the high frequency signal.

主权项

1. An attenuating antenna switch having at least two mutually exclusive attenuating signal paths therethrough, comprising:
a first terminal, a second terminal and an antenna terminal; a first switch connected between the first terminal and the antenna terminal; a second switch connected between the second terminal and the antenna terminal;wherein:
in response to first control signals:
the first switch is configured to attenuate a first signal passing between the first terminal and the antenna terminal by a first attenuation amount, andthe second switch is configured to suppress said first signal from leaking between the antenna terminal and the second terminal; and in response to second control signals:
the second switch is configured to attenuate a second signal passing between the second terminal and the antenna terminal by a second attenuation amount, andthe first switch is configured to suppress said second signal from leaking between the antenna terminal and the first terminal.