Bypass path loss reduction

Abstract

Aspects of this disclosure relate to reducing insertion loss associated with a bypass path. In an embodiment, an apparatus includes a first switch having at least two throws, a second switch having at least two throws, a bypass path between the first switch and the second switch, and at least one inductor. The at least one inductor is configured to compensate for capacitance associated with the bypass path to cause insertion loss of the bypass path to be reduced.

1 . (canceled) 
     
     
         2 . A radio frequency module with bypass path loss reduction, the radio frequency module comprising:
 switches including a first multi-throw switch and a second multi-throw switch;   a receive path between the first multi-throw switch and the second multi-throw switch;   a bypass path between the first multi-throw switch and the second multi-throw switch, the radio frequency module arranged to electrically connect an input of the radio frequency module to an output of the radio frequency module by way of the bypass path in a bypass mode to thereby bypass the receive path; and   at least one inductor configured to compensate for an off state capacitance of the first multi-throw switch in the bypass mode to cause insertion loss associated with the bypass path to be reduced, the off state capacitance of the first multi-throw switch being associated with electrically isolating the receive path of the radio frequency module from the input of the radio frequency module in the bypass mode.   
     
     
         3 . The radio frequency module of  claim 2  wherein the off state capacitance of the first multi-throw switch includes an off state series capacitance associated with a throw of the first multi-throw switch that is unconnected to the bypass path. 
     
     
         4 . The radio frequency module of  claim 2  wherein the at least one inductor includes a shunt inductor, and the first multi-throw switch is coupled between the shunt inductor and the bypass path. 
     
     
         5 . The radio frequency module of  claim 3  wherein the shunt inductor has an adjustable inductance. 
     
     
         6 . The radio frequency module of  claim 2  wherein the at least one inductor includes a shunt inductor having a first end coupled to the bypass path and a second end coupled to ground, and the first multi-throw switch is coupled between the shunt inductor and the input of the radio frequency module. 
     
     
         7 . The radio frequency module of  claim 2  wherein the at least one inductor includes a series inductor coupled between the input of the radio frequency module and the first radio multi-throw switch. 
     
     
         8 . The radio frequency module of  claim 2  further comprising another inductor configured to compensate for an off state capacitance of the second multi-throw switch in the bypass mode. 
     
     
         9 . The radio frequency module of  claim 2  wherein the first multi-throw switch is configured to electrically connect the input of the radio frequency module to the receive path and to electrically isolate the input of the radio frequency module from the bypass path in a receive mode. 
     
     
         10 . The radio frequency module of  claim 2  wherein the receive path includes a filter and a low noise amplifier. 
     
     
         11 . The radio frequency module of  claim 10  further comprising a second receive path between the first multi-throw switch with the multi-throw second switch, the second receive path including a second filter and a second low noise amplifier. 
     
     
         12 . The radio frequency module of  claim 2  wherein the radio frequency module is a diversity module arranged to receive a radio frequency signal from a diversity antenna at the input. 
     
     
         13 . A wireless communication device with bypass path loss reduction, the wireless communication device comprising:
 a primary antenna;   a diversity antenna; and   a diversity module configured to receive a radio frequency signal from the diversity antenna, the diversity module including a bypass path between multi-throw switches, a receive path between the multi-throw switches, and at least one inductor configured to compensate for an off state capacitance of at least one of the multi-throw switches in a bypass mode to cause insertion loss associated with the bypass path to be reduced, the off state capacitance of the at least one multi-throw switch being associated with electrically isolating the receive path from at least an input of the diversity module in the bypass mode.   
     
     
         14 . The wireless communication device of  claim 13  further comprising an antenna switch module in communication with the diversity antenna by way of the diversity module, the antenna switch module being in communication with the primary antenna. 
     
     
         15 . The wireless communication device of  claim 13  wherein the receive path includes a band pass filter and a low noise amplifier. 
     
     
         16 . The wireless communication device of  claim 13  wherein the diversity module includes a second receive path between the multi-throw switches, and the second receive path is associated with a different frequency band than the receive path. 
     
     
         17 . A method of reducing bypass path insertion loss, the method comprising:
 receiving a radio frequency signal from a diversity antenna at an input of a diversity module;   operating the diversity module in a bypass mode in which the input of the diversity module is coupled to an output of the diversity module by way of a bypass path that electrically connects a first multi-throw switch with a second multi-throw switch; and   while operating the diversity module in the bypass mode, reducing insertion loss associated with the bypass path using at least one inductor.   
     
     
         18 . The method of  claim 17  wherein the at least one inductor includes a shunt inductor, and the first multi-throw switch is coupled between the shunt inductor and the bypass path. 
     
     
         19 . The method of  claim 17  wherein the at least one inductor includes a shunt inductor having a first end coupled to the bypass path and a second end coupled to ground, and the first multi-throw switch is coupled between the shunt inductor and the input of the radio frequency module. 
     
     
         20 . The method of  claim 17  wherein the at least one inductor includes an inductor coupled in series in the bypass path. 
     
     
         21 . The method of  claim 17  wherein the method is performed in a mobile phone.