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Attention please:
The use of Eccosorb made or wood made, long tapered terminations apply to waveguide loads only !!
The use of a place of Eccosorb (CR1xx) glued over a 50 Ohm ustrip line is extremally low efficient!!
Generally a performant coax 50 Ohm load remain a difficult object do make and still covered by patents.
Generally, it's build as a very little cilindrical 50 Ohm resistor, connectet to a longer cilindrical metal barrel.
All are placed into a deep enough cilindrical metallic drain. The barrel is the central contact of coax, the metallic drain is the external of coax.
50 ohm line terminated by 50 ohm resistor mught work for wide band, not sure till 50GHz. One has to split the resistor into two 100 ohms and locat it at the edges, most of the current goes. You have to carfully work around the value and locations of the parallel resistors. Again I'm to sure about the bandwidth but it gives prity wide band.
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