| 摘要 |
The present invention relates to an indoor antenna. The antenna includes a signal transmission/reception device which includes a first and second signal processing devices; a first hybrid coupler which includes input ports connected to the first and the second signal processing devices individually, an eleventh output port to output a first signal of the first signal processing device as a phase-maintained signal and output a second signal of the second signal processing signal as a phase-shifted signal, and a twelfth output port in an open state; a cable which is connected to the first output port; a second hybrid coupler which includes a first input port to receive the phase-maintained first signal and the phase-shifted second signal from the input port connected to the cable, a second input port in an open state, a twenty first output port to output the first signal received in the first input port and the phase-shifted second signal, and a twenty second output port to additionally shift the first signal and the phase-shifted second signal and output the signals; a first antenna which is connected to the twenty first output port; and a second antenna which is connected to the twenty second output port. |
