The present invention relates to a method and an outfit for measuring of action of muscles of body, in which method electrical signals created by active muscles are measured with a measuring device and a response from action of muscles is given with a response device with a signal perceptible to a user. The protection layer prevents reduction of the planarization layer during an ashing process, thereby preventing the formation of a steeply tapered via hole through the planarization layer. This detection is enhanced in various cases by using specialized data filters and data processing techniques, which are designed to be computationally simple and therefore are able to be applied to data collected at a high sampling rate in a field device having limited processing power. The antenna elements are preferably printed for low-profile and ease of integration or the antenna elements can be fabricated from larger elements and placed into a space between vehicle and armor or in a cavity cut into the vehicle or armor. The chamber has a diameter greater than the diameter of the first portion of the housing.