Passive low-pass ladder filters with constant input resistance

Bessel filters

Normalized element values

	Ca	Cb	Lb	Rb	L1	C2	L3	C4	L5	C6	L7	C8	L9	C10
3	0.5804	0.3412	0.9915	2.6161	1.4631	0.8427	0.2926
4	0.6121	0.3143	1.0646	2.7036	1.5012	0.9781	0.6127	0.2114
5	0.6465	0.2834	1.1613	2.8896	1.5125	1.0232	0.7531	0.4729	0.1618
6	0.6622	0.2683	1.2094	3.0029	1.5124	1.0329	0.8125	0.6072	0.3785	0.1287
7	0.6876	0.2452	1.2955	3.2070	1.5087	1.0293	0.8345	0.6752	0.5031	0.3113	0.1054
8	0.7091	0.2266	1.3736	3.4024	1.5044	1.0214	0.8392	0.7081	0.5743	0.4253	0.2616	0.0883
9	0.7206	0.2172	1.4167	3.5267	1.5006	1.0127	0.8361	0.7220	0.6142	0.4963	0.3654	0.2238	0.0754
10	0.7270	0.2123	1.4407	3.6091	1.4973	1.0045	0.8297	0.7258	0.6355	0.5401	0.4342	0.3182	0.1942	0.0653

Reflection coefficient plots

November 2002