Novel Dual band SIW Filter Using Quad mode Cavity

Sambaiah Pelluri; Anmol Jain; M. V. Kartikeyan

doi:10.14429/dsj.69.14950

Sambaiah Pelluri Indian Institute of Technology, Roorkee - 247 667
Anmol Jain Indian Institute of Technology, Roorkee - 247 667
M. V. Kartikeyan Indian Institute of Technology, Roorkee - 247 667

DOI: https://doi.org/10.14429/dsj.69.14950

Keywords: SIW, Dual-band, Bandpass filter, Quad-mode cavity, Perturbation

Abstract

A dual-band bandpass substrate integrated waveguide (SIW) filter is proposed using a quad-mode cavity in this paper. First two degenerative modes (TE102 and TE201) with via perturbation give the first passband. The second passband is realised by using higher modes (side and diagonal modes of TE202) which are obtained by putting square slot at the center of the cavity. The square slot increases the frequency ratio of the center frequencies of first and second passbands. Moreover, orthogonal feed-lines are used in the proposed design to increase transmission zeros (TZs) which helps to improve the selectivity and out-of-band rejection of the filter. Designed and fabricated a dualband filter prototype using a single layer printed circuit board (PCB) technology, size is only 19 mm × 19 mm. The insertion losses are 2.1 dB and 2.4 dB, and fractional bandwidths of 3.40 per cent and 2.00 per cent at 11.00 and 15.58 GHz, respectively. The measurement results show close agreement with the simulation results.

Author Biographies

Sambaiah Pelluri, Indian Institute of Technology, Roorkee - 247 667

Mr Sambaiah Pelluri received BTech in electronics and communication engineering from Vignan’s Engineering College, Guntur, India, in 2008, and the MTech in Electronic Design and Technology from National Institute of Technology, Calicut, India, in 2010. He is currently pursuing the PhD with IIT Roorkee, Roorkee, India. His current research interests include developing novel passive components and active devices for microwave and millimeter-wave integrated circuits.

Anmol Jain, Indian Institute of Technology, Roorkee - 247 667

Ms Anmol Jain received BTech in electronics and communication engineering from National Institute of Technology, Hamirpur,India, in 2017. She is currently pursuing the MTech with IIT Roorkee, Roorkee, India. Her research focuses on developing novel passive components for microwave and millimeter-wave integrated circuits.

M. V. Kartikeyan, Indian Institute of Technology, Roorkee - 247 667

Dr M.V. Kartikeyan received MSc in physics, and PhD in electronics engineering from IIT (BHU) Varanasi, Varanasi, India, in 1985 and 1992, respectively. He has been a Full Professor with the Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, India, since 2009. His current research interests include millimeter/ THz wave engineering (electron cyclotron masers, high power devices, and components), metamaterials and fractals, planar microstrip antennas and filters, MICs, and RF and microwave design with soft computing techniques. Prof. Kartikeyan is a Senior Member of IEEE, Fellow of the IET (UK), Institution of Electronics and Telecommunications Engineers (India), Institution of Engineers (India), and Vacuum Electronic Devices and Applications Society (India).