EmiClare windows provide exceptional optical performance without sacrificing EMI shielding characteristics.

The unique EmiClare mesh configuration eliminates the complexity of wire types, mesh counts and plated finishes found in conventional windows.

This data sheet gives you the means to estimate the Emi/rfi shielding performance of an EmiClare window. The data is based on an extensive development programme followed by testing in accredited test houses in the USA and England.

Termination Efficiency
The most efficient termination is the direct contact of the mesh to the bezel / enclosure via a mesh extension. Data for two standard EmiClare terminations are listed below:

Silver busbar	100 MHz - 10GHz	10dB loss
Silver busbar and	100 MHz - 3GHz	10 dB loss
conductive gasket	4 GHz - 10 GHz	0 dB loss
(Conductive fabric over foam gasket)

Between 10 and 100 MHz Optical filters has found that traditional terminations, with a silver busbar contacting the cross section of the wire, are ineffective. We advise that the window uses one of the extended mesh terminations.

Aperture Shadow Effect
In cases where the emission levels are known, the shadow effect of the aperture can be estimated from the nomograph and added to the mesh attenuation with allowance for the termination:

Frequency MHz	1.0	5.0	10	50	100	500	1000
Aperture Attn dB	53	39	33	19	13	0	0
Mesh Attn dB	70	70	70	58	73	60	53
Silver Busbar dB	-10	-10	10	-10	-10	-10	-10
Overall Attn dB	113	99	93	67	76	50	43