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#### marjankashani

##### Newbie level 3
Hi,guys,Im designing a rotman lens with waveguguides as ports. how can I design a dummy load to put at the end of the waveguides?what kind of dummy load?

#### davenn

a common way to make a WG dummy load is to insert a wedge shaped chunk of conductive foam

Dave

#### jiripolivka

a common way to make a WG dummy load is to insert a wedge shaped chunk of conductive foam

Dave

For a power less than 1 Watt, use a wedge made of epoxy filled with powdered iron. Wedge length should be one wavelength long approx.
If you can find a Mylar foil deposited with a resistive layer of 300-400 Ohms/square located in E-plane and tapered makes for a good load but limited to 0.1 W approx.

#### marjankashani

##### Newbie level 3
in practice yes,but how about in CST?coz Ive tried all sort of absorber materials and nothing!

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