Wireless transmission system, control method, and storage medium

A method for controlling a wireless transmission system including a first transmission line coupler and a second transmission line coupler, wherein the first transmission line coupler is arranged in an annular shape and formed of a pair of signal lines configured to transmit a differential signal, and a transmission unit and a terminal resistor are connected to one end and another end of each of the signal lines, respectively, and wherein the second transmission line coupler is shorter than the first transmission line coupler and formed of a pair of signal lines configured to transmit a differential signal, and a reception unit and a terminal resistor are connected to one end and another end of each of the signal lines, respectively, the method comprising:

• controlling the first transmission line coupler and the second transmission line coupler to be arranged so that, in a case where at least one of the first transmission line coupler or the second transmission line coupler rotates about a rotational axis passing through a center of the first transmission line coupler and in a case where one of the pair of the signal lines of the second transmission line coupler crosses a gap between the ends of one of the signal lines of the first transmission line coupler, the other signal line of the second transmission line coupler does not cross a gap between the ends of the other signal line of the first transmission line coupler;
• and
• opposing the controlled first and second transmission line couplers in a noncontact manner to communicate an electric signal using electric field coupling and/or magnetic field coupling.

A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform a process for controlling a wireless transmission system including a first transmission line coupler and a second transmission line coupler, wherein the first transmission line coupler is arranged in an annular shape and formed of a pair of signal lines configured to transmit a differential signal, and a transmission unit and a terminal resistor are connected to one end and another end of each of the signal lines, respectively, and wherein the second transmission line coupler is shorter than the first transmission line coupler and formed of a pair of signal lines configured to transmit a differential signal, and a reception unit and a terminal resistor are connected to one end and another end of each of the signal lines, respectively, the process comprising:

• controlling the first transmission line coupler and the second transmission line coupler to be arranged so that, in a case where at least one of the first transmission line coupler or the second transmission line coupler rotates about a rotational axis passing through a center of the first transmission line coupler and in a case where one of the pair of the signal lines of the second transmission line coupler crosses a gap between the ends of one of the signal lines of the first transmission line coupler, the other signal line of the second transmission line coupler does not cross a gap between the ends of the other signal line of the first transmission line coupler;
• and
• opposing the controlled first and second transmission line couplers in a noncontact manner to communicate an electric signal using electric field coupling and/or magnetic field coupling.