Patent ID: 8902111

Claim:
A system for detecting performance of a bi-polarized antenna including a first antenna and a second antenna, comprising: at least one directional coupler, directly connected to the first antenna and the second antenna of the bi-polarized antenna via a first antenna cable and a second antenna cable, respectively, the at least one directional coupler configured to couple a transmitting signal of the first antenna and another signal from the bi-polarized antenna, the another signal being induced in the second antenna by receiving the transmitting signal of the first antenna, wherein the at least one directional coupler includes a transmitting signal output port configured to output the transmitting signal of the first antenna and an another signal output port configured to output the another signal being induced in the second antenna; a power detector, directly connected to the at least one directional coupler, configured to: receive, from the transmitting signal output port, the coupled transmitting signal of the first antenna, receive, from the another signal output port, the coupled another signal being induced in the second antenna by receiving the transmitting signal of the first antenna, and measure a power of the received transmitting signal and a power of the received another signal as analog results, respectively; an analog-digital converter, directly connected to the power detector, configured to convert the analog results into digital results; and a processing unit, connected to the analog-digital converter, configured to calculate a difference of the digital results.