Radio frequency absorber

A radio frequency absorber, comprising:

• an absorber material having an absorber thickness;
• an attachment surface;
• an absorbing surface opposite said attachment surface, wherein said absorbing surface is primarily resistive;
• and
• a hole disposed within said absorber material, wherein said hole comprises:
• an opening disposed within said absorbing surface;
• a first signal receiving surface opposite said opening;
• and
• a second signal receiving surface adjoining said opening and said first signal receiving surface.

An amplifier configured to reduce cavity resonances associated with a microwave signal within an amplifier device cavity, comprising:

• an active surface comprising an integrated circuit configured to operate at a frequency greater than or equal to 35 GHz;
• a microwave signal absorber comprising an absorber thickness, wherein said microwave signal absorber further comprises a primarily resistive absorbing surface and an attachment surface, wherein said absorber is configured to absorb microwave signals, wherein the microwave signal is incident on said absorbing surface at an incident angle;
• and
• a hole disposed within said microwave signal absorber, said hole comprising:
• an opening coplanar with said absorbing surface, wherein said opening is configured to receive the microwave signal;
• and
• a hole connected to said opening, wherein said hole comprises a hole depth and a hole cross sectional width, wherein said hole receives the microwave signal.