Experimental results of waveguide loaded resonator working in transverse magnetic mode are presented. The coupling coefficient and quality factor value are measured by using reflection coefficient phase and transmission coefficient methods, it is indicated that two methods get similar results and relative deviation is within 3%. Effective suppression of the common mode has been demonstrated, and the rejection of the common mode is over 41dB. The cross-talk isolation between adjacent waveguides is over 48 dB.