HMC137
v03.1007
GaAs MMIC BI-PHASE
MODULATOR, 6 - 11 GHz
Compression vs Frequency *
12
10
P1dB (dBm)
Compression vs Bias at 9 GHz
14
12
P1dB (dBm)
10
8
6
4
2
0
8
6
4
2
5
MODULATORS - BI-PHASE - CHIP
0
6
7
8
9
10
11
12
FREQUENCY (GHz)
0
1
2
3
4
5
6
7
8
9
10
BIAS CURRENT (mA)
Third Order Intercept vs Frequency *
25
20
IP3 (dBm)
15
10
5
0
6
7
8
9
10
11
CARRIER FREQUENCY (GHz)
12
Third Order Intercept vs Bias at 9 GHz
25
20
IP3 (dBm)
15
10
5
0
0
1
2
3
4
5
6
7
8
9
10
BIAS CURRENT (mA)
* (For 5 mA Bias Current)
Suggested TTL Driver for a Bi-Phase Modulator
+5 Vdc
+2.5 Vdc
MODULATOR
I, Q PORTS
*R 1
IA
.01 uF
VCC
VCC
HCT04
TTL
V Z = 2V
GND
HC04
VA
0.6V
GND
2.2K
-2.5 Vdc
.01 uF
HITTITE
MODULATOR
Notes
1. V
A
Alternates Between
+ 2.4 V
dc
± I
A
= 2.4 - 0.6 = ± 5 mA
360 Ohm
2. HCT04 and HC04 are QMOS HEX
Inverters.
*R
1
=300 to 620 ± 2% Select R
1
To
Supply ±3 to ±6 mA to the IF Port.
5 - 16
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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
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HITTITE [ HITTITE MICROWAVE CORPORATION ]
