Apparatus and methods for antenna sharing in a mobile device

A method of antenna sharing in a mobile device, the method comprising:

• controlling access of a WiFi transceiver to a first antenna and a second antenna using a switching circuit that includes a multi-pole multi-throw switch and a single-pole multi-throw switch;
• electrically connecting the WiFi transceiver to the first antenna via a first transmit signal pathway through the multi-pole multi-throw switch in a first mode of the switching circuit;
• electrically connecting the WiFi transceiver to the second antenna via a second transmit signal pathway through both the multi-pole multi-throw switch and the single-pole multi-throw switch in a second mode of the switching circuit;
• and
• substantially matching a total insertion loss of the first transmit signal pathway and a total insertion loss of the second transmit signal pathway using an insertion loss component of the multi-pole multi-throw switch.

A die comprising:

• a substrate;
• a WiFi transmit terminal;
• a plurality of antenna terminals including a first antenna terminal and a second antenna terminal;
• and
• a switching circuit formed on the semiconductor substrate and including a multi-pole multi-throw switch and a single-pole multi-throw switch, the switching circuit having a first mode in which the switching circuit electrically connects the WiFi transmit terminal to the first antenna terminal via a first transmit signal pathway through the multi-pole multi-throw switch, and a second mode in which the switching circuit electrically connects the WiFi transmit terminal to the second antenna terminal via a second transmit signal pathway through both the multi-pole multi-throw switch and the single-pole multi-throw switch, the multi-pole multi-throw switch including an insertion loss component along the first transmit signal pathway to substantially match a total insertion loss of the first transmit signal pathway and a total insertion loss of the second transmit signal pathway.