Optimum Design of Novel UWB Multilayer Microstrip Hairpin Filters with Harmonic Suppression and Impedance Matching

Table 2

Parameters of designed proposed multilayered microstrip hairpin filter (Example 1).

𝑁=5, ILSB = 40 dB, ILPB = 0.1 dB, UWB, 𝑍𝑠 = 45 Ω,
𝑍𝑙 = 100 Ω, 𝑤𝑖 = 1 mm, 𝑎𝑖,1 = 𝑎𝑖,2 and 𝑙𝑖,2 = 𝑙𝑖+1,1
Initial value	Design and optimization
𝑎1,1 = 2 mm	𝑎1,1 = 1.55 mm
𝑎2,1 = 2 mm	𝑎2,1 = 2.00 mm
𝑎3,1 = 2 mm	𝑎3,1 = 3.00 mm
𝑎4,1 = 2 mm	𝑎4,1 = 1.05 mm
𝑎5,1 = 2 mm	𝑎5,1 = 4.00 mm
𝑑1 = 3 mm	𝑑1 = 2.15 mm
𝑑2 = 3 mm	𝑑2 = 1.87 mm
𝑑3 = 3 mm	𝑑3 = 2.95 mm
𝑑4 = 3 mm	𝑑4 = 2.47 mm
𝑑5 = 3 mm	𝑑5 = 2.00 mm
𝑠1 = 1 mm	𝑠1 = 0.80 mm
𝑠2 = 2 mm	𝑠2 = 2.40 mm
𝑡1 = 1 mm	𝑡1 = 1.95 mm
𝑡2 = 2 mm	𝑡2 = 1.06 mm
𝑙1,2 = 5 mm	𝑙1,2 = 6.72 mm
𝑙2,2 = 5 mm	𝑙2,2 = 5.89 mm
𝑙3,2 = 5 mm	𝑙3,2 = 6.27 mm
𝑙4,2 = 5 mm	𝑙4,2 = 5.81 mm