Switch off state isolation

A system comprising:

• a controller having first and second control outputs, the controller configured to:
• in a first mode, set the first control output to a first state and the second control output to a second state;
• and
• in a second mode, set the first control output to the second state and the second control output to the first state;
• a first switch assembly coupled between a first radio frequency (RF) terminal and a second RF terminal, the first switch assembly having a first switch control terminal coupled to the first control output and including a first leakage attenuation circuit, the first switch assembly configured to:
• responsive to the first switch control terminal having the first state, connect the first RF terminal to the second RF terminal and disconnect a first circuit terminal of the first leakage attenuation circuit from one of the first RF terminal or the second RF terminal;
• and
• responsive to the first switch control terminal having the second state, connect the first circuit terminal to the one of the first RF terminal or the second RF terminal and disconnect the first RF terminal from the second RF terminal;
• and
• a second switch assembly coupled between a third RF terminal and the second RF terminal, the second switch assembly having a second switch control terminal coupled to the second control output and including a second leakage attenuation circuit, the second switch assembly configured to:
• responsive to the second switch control terminal having the second state, connect the third RF terminal to the second RF terminal and disconnect a second circuit terminal of the second leakage attenuation circuit from one of the third RF terminal or the second RF terminal;
• and
• responsive to the second switch control terminal having the first state, connect the second circuit terminal to the one of the third RF terminal or the second RF terminal and disconnect the third RF terminal from the second RF terminal.

A method comprising:

• receiving a first signal at a first switch terminal;
• generating a second signal as a phase-shifted and attenuated version of the first signal;
• determining whether operating in a first state or in a second state;
• responsive to operating in the first state:
• connecting the first switch terminal to a second switch terminal;
• and
• transmitting the first signal to the second switch terminal;
• responsive to operating in the second state:
• disconnecting the first switch terminal from the second switch terminal;
• and
• transmitting the second signal to the second switch terminal.