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What is the application of interest? Are you dampening a cavity resonance or absorbing incident plane waves? Do you need a broadband or narrowband frequency response? There's an entire industry ready to sell you products, but what you need depends on what you are trying to do...
i'm still working in survey in my thesis i'm collecting data about all type of absorbers but mainly my target is the multi-layer dielectric absorbers for both semi-finite dielectric and ground metal as well
i need resources about this item
hi
1 DUMMY LOAD : kind of load placed at the end of the ports of microwave devices that
are to be matched. it is made of graphite and carbon with the shape of a long pyramid
. the tapered shape is itself helpful in absorption.
also such structure is placed wholly on wall of antenna chamber.but the material differs.
2 DIELECTRIC SLAB : typically in isolators (as you know it works like a diode)
it is installed on inner wall of the WR90 to absorb the waves.
I don't have the pass. but maybe try to contact to-
Scientific Center for Applied Problems in Electrodynamics (SCAPE), Russian Academy of Sciences, 13/19 Izhorskaya ul., Moscow 127412, Russia rozanov@eldyn.msk.ru
to get this paper.
Numerical study of bandwidth of radar absorbers
K.N. Rozanov - S.N. Starostenko
Microwave absorbers are also vital in the Remote Sensing (RS) arena. One particular book you might find useful if interested on the applications of microwave absorbers for RS is:
"Microwave Remote Sensing: Active and passive" by F. T. Ulaby.
i am trying to implement one planar archimedean spiral antenna ( 0.5 - 3 GHz ) with microwave absorber backing (to absorb unwanted waves) over metal plate back ground.but i don't know how to simulate the absorber in ansoft HFSS, should i go for a PML ( perfectly matched layer ) boundary whereever the absorber is located OR whether any other method (accurate) is there??
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