CHA4094-99F View Datasheet(PDF) - United Monolithic Semiconductors
Part Name
Description
MFG CO.
'CHA4094-99F' PDF : 4 Pages View PDF
36-40GHz High Power Amplifier
CHA4094
Typical On Jig Measurements
Bias Conditions : Tamb = +25°C, Vd = 3.5Volt, Vg = -0.2Volt.
15
10
Gain
5
0
-5
-10 OUT
-15
IN
-20
30
32
34
36
38
40
Frequency (GHz)
25
23 Freq= 36 GHz
21
19
17
15
13
11
9
7
5
-5
0
5
Pout (dBm)
Gain (dB)
10
15
20
Input power (dBm)
25
23
21
19
17
15
13
11
9
7
5
-5
Freq= 38GHz
0
Pout (dBm)
Gain (dB)
5
10
15
Input power (dBm)
Application note
25
23
21
19
17
15
13
11
9
7
5
-5
Freq= 40GHz
0
Pout (dBm)
Gain (dB)
5
10
15
Input power (dBm)
The given DC Bias condition in table or curves are for class A biasing point. This amplifier could be
used in class AB.
For this the Gate voltage must be adjusted for a total drain supply current of typically 500mA.
The loss in linear gain is around 0.4dB, but the output power at 1dB compression point is higher,
between 0.5 and 1dBm more.
This biasing point shows a main advantage in regard of thermal aspect. Indeed the junction
temperature in transistor decreases approximatively of 10°C for 20% reduction in drain current.
Ref. : DSCHA40949349 – 15 Dec. 99
3/4
Specifications subject to change without notice
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Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
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