System with access point and directional antenna

A circuit module for a system comprising an access point, an antenna module and a radio cable connected between the access point and the antenna module, comprising:

• a modulator connected between the access point and the radio cable and configured to receive a clock signal and a power voltage from the access point and modulate the clock signal and the power voltage into a modulated power to be transmitted over the radio cable, wherein the power voltage comprises a first voltage generated from a first power supply and a second voltage generated from a second power supply, and wherein the modulator is electrically connected to the first power supply and the second power supply so as to generate the modulated power having the first voltage or the second voltage alternated with each other;
• and
• a demodulator connected between the radio cable and the antenna module and configured to demodulate the modulated power into a demodulated clock signal,
• wherein the antennal module is provided with at least one directional antenna and at least one sensor to sense the at least one directional antenna, and the at least one sensor is configured to receive the demodulated clock signal and the modulated power.

A method of forming a system comprising an access point, an antenna module and a radio cable connected between the access point and the antenna module, the method comprising:

• providing a sensor on the antenna module provided with a directional antenna;
• connecting a modulator between the access point and the radio cable;
• and
• connecting a demodulator between the radio cable and the sensor,
• wherein the modulator is configured to receive a clock signal and a power voltage from the access point and modulate the clock signal and the power voltage into a modulated power to be transmitted over the radio cable, wherein the power voltage comprises a first voltage generated from a first power supply and a second voltage generated from a second power supply, and wherein the modulator is electrically connected to the first power supply and the second power supply so as to generate the modulated power having the first voltage or the second voltage alternated with each other;
• and
• the demodulator is configured to demodulate the modulated power into a demodulated clock signal to be transmitted to the sensor;
• and
• the sensor is configured to receive the demodulated clock signal and the modulated power.