University of Tabriz Tabriz Journal of Electrical Engineering 2008-7799 54 4 2024 11 21 Design and Implementation of a DC- 18 GHz Microwave Triplexer in Suspended Stripline Technology Design and Implementation of a DC- 18 GHz Microwave Triplexer in Suspended Stripline Technology 455 464 17602 10.22034/tjee.2024.58972.4751 FA S. M. Miri School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran. 2 School of Electrical and Computer Engineering, K. Mohammadpour Aghdam School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran S.O. Miri School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran Journal Article 2023 10 25 This paper presents design, optimization and measurement results of a microwave triplexer implemented using suspended stripline technology to separate DC-18 GHz input signal into three jointed frequency ranges of DC-2 GHz, 2-6 GHz and 6-18 GHz with VSWR better than 2, isolation higher than 50 dB and insertion loss better than 1 dB. The proposed triplexer consists of lowpass and pseudo-highpass filter channels connected by suitable high and low impedance T-junctions. These filters are realized using generalized Chebyshev lowpass prototype to achieve high selectivity and sharp band-edge roll-off with ease in implementation by using printed circuit board technology. Stepped impedance resonators are used to achieve a better impedance matching and wideband response. The triplexer pattern is implemented on a 0.254 mm-thick RT/duroid 5880 substrate with dielectric constant of 2.2, suspended symmetrically between two ground planes which enables the realization of a contiguous triplexer with low insertion loss, high selectivity and high isolation. This Triplexer can be used in Radar warning receivers and electronic intelligent systems. This paper presents design, optimization and measurement results of a microwave triplexer implemented using suspended stripline technology to separate DC-18 GHz input signal into three jointed frequency ranges of DC-2 GHz, 2-6 GHz and 6-18 GHz with VSWR better than 2, isolation higher than 50 dB and insertion loss better than 1 dB. The proposed triplexer consists of lowpass and pseudo-highpass filter channels connected by suitable high and low impedance T-junctions. These filters are realized using generalized Chebyshev lowpass prototype to achieve high selectivity and sharp band-edge roll-off with ease in implementation by using printed circuit board technology. Stepped impedance resonators are used to achieve a better impedance matching and wideband response. The triplexer pattern is implemented on a 0.254 mm-thick RT/duroid 5880 substrate with dielectric constant of 2.2, suspended symmetrically between two ground planes which enables the realization of a contiguous triplexer with low insertion loss, high selectivity and high isolation. This Triplexer can be used in Radar warning receivers and electronic intelligent systems. https://tjee.tabrizu.ac.ir/article_17602_b680f674fce0be0a5ab6cf78904b3a6a.pdf