Methods and devices to control radiated spurious emission in RF antenna switches

A radio frequency (RF) antenna switch, comprising:

• a first switch element coupled between a common port of the RF antenna switch and a first throw of the RF antenna switch, the first switch element comprising:
• a through stack comprising a plurality of intrinsic N-type FET transistors and at least one regular N-type FET transistor arranged in series connection, the through stack coupled between the common port and the first throw;
• and
• a shunt stack comprising a plurality of intrinsic N-type FET transistors arranged in series connection, the shunt stack coupled between the first throw and a reference ground;
• wherein:
• the RF antenna switch is configured to operate according to an active mode and an inactive mode, the inactive mode defining a low power consumption mode, and
• control voltages applied to the first switch element during the active mode comprise positive and negative voltages having respective magnitudes that are greater than one, and the control voltages applied to the first switch element during the inactive mode have a magnitude of zero.

A radio frequency (RF) antenna switch, comprising:

• a first switch element coupled between a common port of the RF antenna switch and a first throw of the RF antenna switch, the first switch element comprising a through stack and a shunt stack,
• the through stack comprising a plurality of intrinsic N-type FET transistors and at least one regular N-type FET transistor arranged in series connection, the through stack coupled between the common port and the first throw, and
• the shunt stack comprising a plurality of intrinsic N-type FET transistors arranged in series connection, the shunt stack coupled between the first throw and a reference ground,
• wherein:
• the RF antenna switch is configured to operate according to an active mode and an inactive mode, the inactive mode defining a low power consumption mode,
• control voltages applied to the first switch element during the active mode consist of positive and negative voltages having respective magnitudes that are greater than one, and
• the control voltages applied to the first switch element during the inactive mode have a magnitude equal to zero.