microwave absorber pads
microwave absorbers
Microwaves emanating from electronic components such as the printed
circuit board sketch at the right are addressed in three ways: sometimes
no shielding is required; a reflective shield in the form of a local cover for
the components, or the entire electronic enclosure can be fitted up as a
shield; an absorber pad shield which soaks up the RF and converts it to
imperceptible heat energy.
The latter Absorber Shield method deals with the unwanted microwave
energy right at the source and prevents re-radiation and reflection of the
signals so that neighboring components are unaffected.
Reflective Shield
Reflective Shield
Typical shielding approach allows
reflected radiation to affect neighboring
components.
Absorber Shield
Absorber Shield
Noise absorber approach assimilates
radiated frequencies and converts to
imperceptible heat energy.
microwave absorber
up to 116 GHz: MA series
The MA series is a high frequency microwave noise absorber in a range
of formulations addressing 2.5GHz to 116GHz radiations from electronic
components. It has a multi-layered structure of screened coating matrixes
adjusted for discrete impedance matching to absorb microwaves from a
wide range of angles.
Absorber Shield
Absorber Shield
Absorber Shield
Absorbers
Absorber
use below and above
shown in
Shield
Printed Circuit Board.
applications:
PCB’s, PCB components, electronic enclosures, shielded boxes, RF
equipment, VICS base antennas, radar equipment, mobile phone
devices, architectural shielding, RF test chambers, shielded facilities
Material Characteristic
Frequency range
Peak frequency choices
Temperature range
Flammability rating
Adhesive: temperature
tack
shear
Dimensions: standard
maximum
Measure
2.0 MHz - 116.0 GHz
2.4, 5.8, 10, 18, 24, 26, 38, 60, 76, 110 GHz
-20˚C to 110˚C
UL94-V0
0˚F to 180˚F
-18˚C to 83˚C
ASTM D-3575
8.4 p.s.i. (stainless steel)
ASTM D-3575
300+ hrs. @ 2 p.s.i. @
22˚C
ASTM D-3575
7.875” W x 15.75 “ L x .138” max.200,0
x 400,0 x 3,5
3’-0” W x 65’-0” L x .138” max
1,0 x 20,0 M x 3,5
PART No.
MA24
MA58
MA100
MA180
MA240
MA260
MA380
MA600
MA760
MA1100
Width
7.875
7.875
7.875
7.875
7.875
7.875
7.875
7.875
7.875
7.875
200,0
200,0
200,0
200,0
200,0
200,0
200,0
200,0
200,0
200,0
Length
15.75
15.75
15.75
15.75
15.75
15.75
15.75
15.75
15.75
15.75
400,0
400,0
400,0
400,0
400,0
400,0
400,0
400,0
400,0
400,0
Thickness
.138
.100
.055
.040
.024
.027
.024
.035
.035
.035
3,5
2,6
1,4
1,0
0,6
0,7
0,6
0,9
0,9
0,9
Frequency Range @ -20 dB
2.2
5.5
9.2
16.5
22.5
25.2
35.8
52.0
72.0
104.0
–
–
–
–
–
–
–
–
–
–
2.6 GHz
6.2 GHz
10.8 GHz
19.5 GHz
25.5 GHz
27.0 GHz
40.2 GHz
64.2 GHz
80.0 GHz
116.0 GHz
Peak Frequency – Attenuation
2.4GHz
5.8GHz
10.0GHz
18.0GHz
24.0GHz
26.0GHz
38.0GHz
60.0GHz
76.0GHz
110.0GHz
@
@
@
@
@
@
@
@
@
@
-21.0dB
-23.5dB
-23.5dB
-24.1dB
-24.3dB
-21.4dB
-21.4dB
-21.6dB
-20.0dB
-21.2dB
All dimensions in inches
millimeters
±1.6%, or ±0.005”
0,13 mm
minimum
microwave absorber pads
microwave series: typical absorption rate by part number
The following data displays the insertion loss characteristics of each formula of absorber material by part number.
MA24 Absorb rate for each angle
0
5
10
Absorption Rate (-dB)
MA58 Absorb rate for each angle
0
5
10
Absorption Rate (-dB)
15
20
25
30
35
40
1.8
15
20
25
30
35
40
4.6
1.9
2.0
2.1
2.2
15˚
2.3
2.4
30˚
2.5
2.6
45˚
2.7
55˚
2.8
2.9
3.0
3.1
4.8
5.0
5.2
5.4
15˚
5.6
5.8
30˚
6.0
6.2
45˚
6.4
55˚
6.6
6.8
7.0
7.2
Frequency GHz
Angle
Angle
Frequency GHz
MA100 Absorb rate for each angle
0
5
10
0
5
10
MA180 Absorb rate for each angle
Absorption Rate (-dB)
Absorption Rate (-dB)
7.5
8.0
8.5
9.0
15˚
9.5
10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5
30˚
45˚
55˚
15
20
25
30
35
40
7.0
15
20
25
30
35
40
15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 20.5 21.0 21.5
Frequency GHz
Angle
15˚
30˚
45˚
55˚
Frequency GHz
Angle
MA240 Absorb rate for each angle
0
5
10
0
5
10
MA260 Absorb rate for each angle
Absorption Rate (-dB)
15
20
25
30
35
40
21.0 21.5 22.0 22.5 23.0 23.5 24.0 24.5 25.0 25.5 26.0 26.5 27.0 27.5
Frequency GHz
Angle
15˚
30˚
45˚
55˚
Absorption Rate (-dB)
15
20
25
30
35
40
23.0 23.5 24.0 24.5 25.0 25.5 26.0 26.5 27.0 27.5 28.0 28.5 29.0 29.5
Frequency GHz
Angle
15˚
30˚
45˚
55˚
MA380 Absorb rate for each angle
0
5
10
0
5
10
MA600 Absorb rate for each angle
Absorption Rate (-dB)
15
20
25
30
35
40
35.0 35.5 36.0 36.5 37.0 37.5 38.0 38.5 39.0 39.5 40.0 40.5 41.0 41.5
Frequency GHz
Angle
15˚
30˚
45˚
55˚
Absorption Rate (-dB)
15
20
25
30
35
40
54.0 55.0 56.0 57.0 58.0 59.0 60.0 61.0 62.0 63.0 64.0 65.0 66.0 67.0
Frequency GHz
Angle
15˚
30˚
45˚
55˚
MA760 Absorb rate for each angle
0
5
10
0
5
10
MA1100 Absorb rate for each angle
Absorption Rate (-dB)
Absorption Rate (-dB)
15
20
25
30
35
40
69.0 71.0 72.0 73.0 74.0 75.0 76.0 77.0 78.0 79.0 80.0 81.0 82.0 83.0
Frequency GHz
Angle
15˚
30˚
45˚
55˚
15
20
25
30
35
40
104.0 105.0 106.0 107.0 108.0 109.0 110.0 111.0 112.0 113.0 114.0 115.0 116.0 117.0
Frequency GHz
Angle
15˚
30˚
45˚
55˚
Mulberry Professional Plaza • 426 Mulberry Street, Suite 300
•
Scranton, PA 18503
Tel: 570.961.5617 • Fax: 570.969.6274 • e-mail: info@ferrishield.com
•
www.ferrishield .com
ISO 9001:2000 registered
All dimensions in inches
millimeters
±1.6%, or ±0.005”
0,13 mm
minimum
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