This paper presents a dual-mode bandpass filter with asymmetric passband response. Hexagonal shaped Substrate Integrated Cavity (SIHC) has been used to implement the proposed filter. Perturbation technique has been used to realize this bandpass response. The filter has four poles and one transmission zero introduced at the left of the passband. The design has passband insertion loss of 0.65 dB and fractional bandwidth of 5.1% at X-band. © 2013 IEEE.