Electric Circuit Components & Parts

Cuming Microwave manufactures a family of flexible carbon loaded microwave and radar absorber materials. These are all electrically resistive materials which attenuate RF energy through ohmic loss. These Carbon based microwave absorbers such as C-RAM MT have high dielectric loss over a very broad frequency range, but are available in a range of loadings and thicknesses to be optimized for particular frequencies. Many grades are available with a peel-and-stick adhesive for ease of application.
Some of the materials, such as C-RAM LF and AR, have impedance gradients and are designed to absorb free-space planar waves. They are often used to cover metal structures in the path of RF energy to eliminate unwanted reflections. These materials can be weather-wrapped for outdoor applications.
Cuming Microwave also offers carbon loaded microwave absorbers such as C-RAM LF and AR, This type of microwave absorber has an impedance gradient and are designed to absorb free-space planar waves. They are often used to cover metal structures in the path of RF energy eliminating unwanted reflections. Carbon loaded microwave absorbers can be weather-wrapped or sprayed with a protective coating for outdoor applications.
Cuming Microwave application engineers can help you with your RF energy management problems, and help specify a product to quickly solve your problem. Carbon loaded microwave absorber grades are available with a peel-and-stick adhesive for ease of application. Carbon loaded microwave absorbers can also be ordered diecut or waterjet to your drawing.

Cuming Microwave produces honeycomb microwave absorbers in both flat and pyramidal materials. Click on our products and technical bulletins below or call us with any questions you may have. We would be happy to assist you with choosing the best materials for your project no matter what the size.

Cuming Microwave manufactures a full range of epoxy and silicone based sheet and rod stock, loaded with high magnetic loss carbonyl iron and ferrite fillers. The proper filler and loading level can produce a very lossy material in UHF, microwave or millimeter wave frequencies. Unlike carbon based absorbing materials, these products utilize magnetic hysteresis loss and operate on the magnetic field. They are not electrically conductive, and can be placed directly in contact with circuitry.
These products can be precision machined like aluminum or a hard plastic to complex final shapes. In addition, we can custom mold materials to shape, and can supply 2-component liquid resins for casting in place. These materials have been used to produce waveguide loads and absorptive housings, and they can be cast directly into RF device packages to attenuate unwanted noise and resonances.

Often, when radio frequency sources are located inside a shielded cavity, the RF energy can resonate within the cavity, and interfere with the signal or create crosstalk with other adjacent devices. Microwave absorber (lossy materials) can be strategically placed within the cavity or housing to attenuate resonances and eliminate crosstalk. Many times magnetic microwave absorbers such as our C-RAM FLX, RGDS, GDX or GDSS are used. C-RAM FLX is a tuned narrowband resonant absorber which can be ordered with its resonance specified anywhere between 0.8 to 40 GHz. C-RAM RGDS, GDX and GDSS are broadband magnetically loaded microwave absorbers and are very effective for cavity resonance suppression.
Cuming Microwave manufactures lossy magnetic rubber sheet materials which can be used for RF suppression. These sheet materials have high RF loss and can attenuate RF fields on a surface or inside a cavity. These materials are lossy and will attenuate over a wide frequency range; they will work better at shorter wavelengths as their relative electrical thickness increases. Magnetic absorbers are not electrically conductive, and can be placed directly over circuits without creating shorts.
Cuming Microwave supplies magnetic microwave absorbers in sheet form, and can custom die-cut or water jet-cut parts to a drawing. Microwave absorber materials are often supplied with a pressure-sensitive adhesive backing (peel-and-stick), which works in most applications. However, in extreme conditionselevated temperature, vibrations, etc, we recommend more durable adhesives to attach these materials.

Cuming Microwave produces honeycomb microwave absorbers in both flat and pyramidal materials. Click on our products and technical bulletins below or call us with any questions you may have. We would be happy to assist you with choosing the best materials for your project no matter what the size.

Cuming Microwave manufactures a full range of epoxy and silicone based sheet and rod stock, loaded with high magnetic loss carbonyl iron and ferrite fillers. The proper filler and loading level can produce a very lossy material in UHF, microwave or millimeter wave frequencies. Unlike carbon based absorbing materials, these products utilize magnetic hysteresis loss and operate on the magnetic field. They are not electrically conductive, and can be placed directly in contact with circuitry.
These products can be precision machined like aluminum or a hard plastic to complex final shapes. In addition, we can custom mold materials to shape, and can supply 2-component liquid resins for casting in place. These materials have been used to produce waveguide loads and absorptive housings, and they can be cast directly into RF device packages to attenuate unwanted noise and resonances.