Bandwidth-Improved HMSIW Resonator Based Filtennas for Single/Dual Channel Network

A low-profile single-layered filtenna scheme for single/dual-frequency channels are demonstrated. The designs utilize a half-mode substrate integrated waveguide (HMSIW) resonator. The HMSIW technology was employed to realize the filtenna compactness, and a via-slot combination was organized to increase the functioning bandwidth, exhibiting two resonances in the respective passband. Besides, the design has been scaled for dual-frequency channel applications. The dual-channel for transceiver application was apprehended by arranging the scaled version of single-channel filtenna. Finally, dual-channel filtenna was fabricated and its performance was validated experimentally. The measured results are in good agreement with the simulated counterpart. The results show that the design exhibits impedance bandwidths of around 3.0 % i.e., 8.63-8.88 GHz and 4.2% i.e. 9.26-9.66 GHz for lower and upper-frequency pass channels, respectively. The proposed design has a consistent broadside radiation pattern and polarization in the operating bands, manifesting the proposed filtenna can be a promising candidate for multi-service wireless communication systems. The proposed design also exhibits good performance in terms of port isolation, flat in-band gain response, and out-of-band frequency selectivity.