We propose an RF sensor array for lung disease detection. The size of the sensor array is 4cm*89.4cm. The sensor consists of 38 electrodes and 37 ports. The first two electrodes are optimized to operate at 60 MHz and act as a signal exciter. The remaining 36 electrodes receive the radiated field. The transmission coefficients Si1 at each passive port are calculated using HFSS software. An equation was designed for dielectric constant estimation using the Least Squares (LS) method. The sensor is fabricated using Inkjet printing. The experiments of the fabricated sensor were conducted on an average adult human chest elliptical model.