MBITR TVAS Antenna MBITR Tactical Vest Antenna System (TVAS) is an antenna system designed to be worn by the U.S. military communicator. TVAS is a body-worn SINCGARS antenna optimized (30-88 MHz) for intra-squad communications with handheld radios. 3 to 4 times the range of the whip and rubber duck antenna systems Provide the operator a tactical advantage over long whip antennas. SINCGARS link performance. While providing better tactical concealment.