Calibration method of microwave measurement system for dielectric samples detection

In this paper, calibration method of microwave measurement system for dielectric samples detection composed of two baluns and coupled-line sensor inserted in-between is presented. The presented sensor allows for detection of dielectric sample having size comparable to the distance between the sensor's coupled strips and therefore is dedicated for biomedical or industrial applications. To directly measure the coupled-line sensor and eliminate the influence of the baluns on the obtained measurement results, the recently published calibration method has been adopted and utilized. The obtained results prove the correctness of the presented approach.