NJT1946A
X-Band Radar Front End
NJT1946A is designed for the front end of marine radar system.
It features a small size and a lightweight operable at any frequency
between 9.345GHz and 9.475GHz
This front-end module consists of GaAs FET low noise amplifier, Image
rejection mixer and Local VCO with buffer amplifier.
FET monitoring circuit is included to monitor FET drain current.
The stability of the local VCO frequency by the input RF power is
increased effectively by the buffer amplifier which is located between
image rejection mixer and local VCO.
---- ELECTRICAL ---- <at 25 degree centigrade>
Min
Typical
Max
Operating Voltage
4.8
5.0
5.2
Operating current
-
-
80
Local frequency VT = 4V
-
-
9.38
VT = 24V
9.56
-
-
Noise figure
-
-
3.5
Conversion gain
3.0
-
7.0
1dB Gain compression point(RF Port)
-10
-8
-
Monitor voltage
-
50
-
RF single pulse burnout(Note1)
-
-
600
RF repetitive Pulse burnout(Note2)
-
-
400
Notes:
1. f=9.41GHz, Pd=10nsec
2. f=9.41GHz, Pd=1us, Duty=0.001
---- BLOCK DIAGRAM ----
Balanced
Mixer
WG-MIC
Transition
RF IN
90擄
Mori
CKT
LNA
0擄
0擄
Divider
0擄
Balanced
Mixer
MONITOR
OUT
Lo.
VCO
Buffer
Amplifier
TUNE
Unit
V
mA
GHz
GHz
dB
dB
dBm
mV
mW
mW
鈭?/div>
IF OUT
For further information on the use of the front end, please contact
New JRC. New JRC reserves the right to change the specification of goods
without notice.
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