Wireless antenna system for sensors on circumferential interior surface of turbomachine casing

A method of operation for a wireless sensor antenna system for a turbomachine including a rotating blade including a passive sensor, the method comprising:

• mounting an antenna extending continuously along a circumferential interior surface of a casing of the turbomachine that surrounds the rotating blade;
• mounting a power transmission element extending along the at least portion of the circumferential interior surface of the casing to power the passive sensor with an electromagnetic signal;
• and
• measuring a physical property of the rotating blade by powering the passive sensor with the power transmission element and receiving a wireless signal from the passive sensor on the rotating blade at the antenna, the wireless signal including data indicative of the physical property.