Figure 3 | A compact and high performance dual-band bandpass filter based on unbalanced composite right/left-handed transmission lines for WLANs applications | SpringerLink
Design and Simulation of Microstrip Hairpin Bandpass Filter with Open Stub and Defected Ground Structure (DGS) at X-Band Frequency | Semantic Scholar
First UVC Far-UVC 222nm 220nm 210nm Bandpass Filter For AP-UVGI Light Applications - 90mm x 50mm x 1mm (R2) F15B-B1 - First UVC