نوع مقاله : علمی-پژوهشی
نویسندگان
1 دانشکده مهندسی برق و کامپیوتر، دانشگاه تهران، تهران، ایران
2 گروه مخابرات، دانشکده مهندسی برق و کامپیوتر دانشگاه تهران
3 دانشکده مهندسی برق و کامپیوتر، دانشکاه شیراز، شیراز، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
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.
کلیدواژهها [English]