A sensor and method of making a sensor for detecting an incident signal is provided. The sensor includes a frame, an antenna and a platform configured to detect the incident signal, and a holding arm connected to the frame, the holding arm configured to structurally support the antenna and the platform, and further configured to operably connect the platform to an electronic device external to the frame. The holding arm includes a conductor having an axial length and a plurality of disturbance elements formed along the axial length of the conductor.