An electronic device eliminating wireless signal interference includes a first radio unit, a second radio unit, and a quadrature coupler. The first radio unit includes a first antenna and a first transceiver. The first transceiver is configured to output first wireless signals via a first port. The second radio unit operates on a same frequency of the first radio unit, and includes a second antenna and a second transceiver. The second transceiver is configured to output second wireless signals via a second port. The quadrature coupler is connected to the first and the second ports, configured to separate the first wireless signals from the second wireless signals, and further to cause a first radiation field pattern of the first wireless signals to be orthogonal with a second radiation field pattern of the second wireless signals.