“…4; having four fingers in each side in opposite direction in the upper plane of a microstrip line. These fingers are connected to the closed rectangular rings terminated with the A comparison between this work with some other works in [21,28,29] of UWB filters related to resonance frequency (f o ), bandwidth (BW), length of device (l), insertion loss (S 21 ), return loss (S 11 ), and quality factor (Q) are listed in Table 4. The approximate miniaturization in the presented design is 53 % compared to the design in [28].…”