88
High Power Fixed Attenuators (Heat sink Mounting Type)
AT-1200 and AT-1300 Series
■Features
1.Small Size and Economical
Beryllia is used for the material of the resistance
element to enable the attenuation to be of small
size and low cost.
2.High Power Capacity
Mounting these attenuators to a heat sink permits the
AT-1200 Series to be used at up to 30 W and the AT-
1300 Series to be used at up to 50 W.
3.High Reliability
These attenuators show stable characteristics for
environments of varying temperature, humidity, and
gases.
AT-1210-H • JAT-1320-H • J
■Product Specifications
Ratings Frequency range (Note)
Characteristic impedance
Maximum Input Power (Note)
DC to 2.0 GHz
50 ohms
30 to 50 W
Operating temperature range
Operating relative humidity
-10çto +65ç
95% Max.
Note: The frequency range and the maximum input power will differ depending on the products.
Item Standard Conditions
1.Vibration
2.Shock
3.Temperature cycle
No electrical discontinuity of 1 µs or more
No damage, cracks, or parts dislocation
No damage, cracks, or parts dislocation
Frequency of 10 to 2000 Hz, overall amplitude of 1.52 mm,
acceleration of 98 m/s2for 2 hours in each of 3 directions
Acceleration of 490 m/s
2
, sine half-wave waveform,
3 cycles in each of the 3 axis
Temperature: -55
ç
→
+5
ç
to +35
ç
→
+85
ç
→
+5
ç
to +35
ç
Time: 30 →15 max. →30 →15 max. (Minutes)
200 cycles
●The test method conforms to MIL-STD-202.
■Materials
Part
Connector Body Stainless steel Passivated
Conductive white alumite
Gold plating
Body
Female contacts
Insulation
Attenuation element
Aluminum
Beryllium copper
PTFE
Metal film
----------
----------
Material Finish
■Ordering Information
1 2 3
AT - 12 10 - H •• J
AT: Indicates a fixed attenuator
Indicates the Series Name
(Maximum Usable Power)
12: HRM type plug - jack 30W
13: N type plug - jack 50W
1
2
Attenuation
10 : 10dB
20 : 20dB
Coupling Portion
H• J : SMA type jack - jack
N• H : N type jack - SMA type jack
3
4
4
89
■Specifications
Part Number Frequency
Range
(GHz)
Attenuation
(dB) V.S.W.R.
(Max) Power
(W)
Impedance
(ohms)Weight
(g)
Connectors
Heat Sink
Temperature at
Maximum Load
(çMax)
AT-1210-H • J
AT-1220-H • J
AT-1310-H • J
AT-1320-H • J
DC~1
DC~1
DC~2
DC~2
10±0.5
20±0.5
10±0.5
20±0.5
1.2
1.2
1.2
1.2
50
50
50
50
30W(CW)
30W(CW)
50W(CW)
50W(CW)
+65
+65
+65
+65
HRM-J • J
HRM-J • J
HRM-J • J
HRM-J • J
54
54
54
54
π
π
AT-1200-H • J
AT-1300-H • J
AT-1220 AT-1320
■External Dimensions
πThe AT-1300 Series has input and output directivity.
■Typical Data
