Journal
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
Volume 134, Issue -, Pages -Publisher
ELSEVIER GMBH
DOI: 10.1016/j.aeue.2021.153711
Keywords
Bandpass filter (BPF); Broadband BPF; Defected ground structure (DGS); Microstrip-to-CPW transition; Ultra-wideband (UWB)
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This manuscript reports a planar ultra-wideband bandpass filter with multiple passband transmission zeros and wide stopband. The filter architecture consists of microstrip-to-coplanar waveguide transitions and defected ground structures to achieve optimal frequency characteristics. Through simulation and measurement, a prototype with compatible frequency characteristics is developed.
A planar ultra-wideband (UWB) bandpass filter (BPF) with multiple passband transmission zeros (TZs) and wide stopband is reported in this manuscript. The basic architecture of the BPF consists of two microstrip-to-coplanar waveguide (CPW) transition arranged on either sides of the substrate. A 3rd order BPF hence developed displays good frequency characteristics with two TZs on either passband edges. Later, defected ground structures (DGS) in the form of complementary split ring resonator (CSRR) and complementary folded split ring resonator (CFSRR) are utilized to place three TZs in the passband so as to cut off in-band interferences. Upon optimized simulation, a prototype is eventually developed and measured for compatible frequency characteristics.
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