From the radiated aspect, which is most applicable to Antenova, the US carriers primarily measure total radiated power (TRP) and total isotropic sensitivity (TIS). Most carrier have their own minimum values that prospective device manufacturers are to meet.
Antenova does our best to work with our customer to provide antenna design guidance in order to meet the carrier minimum requirements by offering services such as antenna design review to optimize the location of our antennas, passive antenna efficiency measurements once our antennas are integrated into the device to determine the efficiency of the antenna along with the gain, and active carrier pre-certification testing of the TRP and TIS to ensure the system is ready to certify.