In this paper, a new design of a frequency reconfigurable microstrip antenna by using microstrip line feeding for UWB applications is presented. The process of frequency band rejection is done through the slots on the radiation patch and ground plane of antenna. Also the antenna bandwidth has been improved by using partial Defected Ground Structure (DGS). Then by putting two switches on the gro...

In this letter, a compact wideband bandpass filter (BPF) with wide stopband is proposed based on the substrate integrated defected ground structure (SIDGS) and folded stepped-impedance resonator (FSIR). Such SIDGS can not only allocate specific resonance size but also introduce different harmonic positions compared traditional microstrip line resonator. Meanwhile, due to discrepant of FSIR, res...

A compact ultra-wideband bandpass filter based on a multilayer printed circuit board (MPCB) structure is proposed in this paper. RO4450F prepreg used to bond three RO4350B dielectric substrates with different thicknesses the MPCB structure. The upper surfaces of are respectively provided copper-coated structures patterns. blind holes and defected ground (DGS) added an filter. Two groups loaded ...