150° Bend Half Mode Substrate Integrated Waveguide (HMSIW) Band-pass Filter using T-shaped Periodic Elements

Design of a 150° bent HMSIW filter using T-slots is furnished in this paper. Microstrip to SIW transitional feeding technique is used at both at input and output ports over a material with dielectric constant of 3.2 and thickness 0.8. Array of five and nine T-slots are integrated over the HMSIW structure to achieve the band-pass property. The insertion loss is found to be 0.84dB. The design steps are discussed and it has been shown that the transmission pass-band can be shifted at other frequency bands by changing the parameters of the T-slots. Wideband response is obtained by using the technique within the microwave X and Ku frequency bands. The filter configurations presented in this paper are concise, cost effective and easily fabricable.