3–21 GHz THREE-CHANNEL DOWNCONVERTER
MODEL: 136460
FEATURES
• High reliability, spaceborne application
• Broadband RF/LO coverage..... 3–21 GHz
• Broadband IF operation............ 250–1550 MHz
• LO power range......................... 10–16 dBm
• Conversion gain ........................ 25 dB nominal
• LO/RF isolation.......................... 30 dB typ., 20 dB minimum
• LO/IF isolation ........................... 40 dB typ., 30 dB minimum
• Digital gain control.................... 0–31.5 dB, 0.5 dB steps
• Low power ................................. 165 mA (5 V),
2 mA (-5 V) typ. per channel
• Lightweight ................................ 400 grams typical
ELECTRICAL SPECIFICATIONS
RF INPUT PARAMETERS CONDITION UNITS MIN. TYP. MAX.
Frequency range GHz 3.2 21.2
IF/RF VSWR Ratio 1.5:1
LO frequency range GHz 4.8 19.5
LO power dBm 10 16
LO VSWR Ratio 2.5:1
IF OUTPUT PARAMETERS CONDITION UNITS MIN. TYP. MAX.
Number of IF outputs Per channel 2
Operating range MHz 250 1550
RF-to-IF gain At maximum gain dB 25
Digital attenuator control step size 6-BIT control dB 0.5
Digital attenuator dB 0 31.5
Output power (1 dB compression) dBm -1 0
Calibration port coupling value dB 16
Coupling flatness 250–1550 MHz dB ±1
VSWR 250–1550 MHz Ratio 1.5:1
OTHER PARAMETERS CONDITION UNITS MIN. TYP. MAX.
LO-to-RF isolation dB 20 30
LO-to-IF isolation dB 30 40
Connectors, RF, IF, LO SMA
Connectors, DC, control 1 per channel 15-pin, micro D
Supply voltage Volts ±5
DC power consumption for each At 5 V per channel mA 165
downconverter At -5 V per channel mA 2
Weight Grams 400
MITEQ’s model 136460 broadband three-channel downconverter functions as the second IF down conversion stage
of a low earth orbit-based millimeter-wave radiometer. Coupled with one of five MITEQ frequency multiplexers as
an input stage, the system provides maximally flat frequency response over the bands of interest, high linearity of
output power to input power, and high isolation between the frequency bands of interest as well as from other
undesirable signals. In addition, this high reliability, spaceborne integrated assembly is optimized for small size, low
power consumption, lightweight, and excellent thermal stability of operation.
ENVIRONMENTAL CONDITIONS
Operating temperature . . . . . . . . . . 10 to 60°C
Storage temperature . . . . . . . . . . . -25 to +60°C
Vibration . . . . . . . . . . . . . . . . . . . . 6.5 Gs RMS, 20–2000 Hz
Radiation . . . . . . . . . . . . . . . . . . . . 30 krads, total DOSP
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MODEL 136460 TYPICAL DATA
FUNCTIONAL BLOCK DIAGRAMS
0
22
21
20
19
18
17
16
15
22
21
20
19
18
17
16
15
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
0.25 0.35 0.45 0.55 0.65 0.75 0.85
IF FREQUENCY (GHz)
IF FREQUENCY (GHz) IF FREQUENCY (GHz)
IF RESPONSE, LSB, ATTEN. SETTING = 7 dB
IF RESPONSE, USB, ATTEN. SETTING = 7 dB
CHANGE IN GAIN FROM ROOM
TEMP. (+25°C) (dB)
GAIN (dB)
GAIN (dB)
GAIN VARIATION VS. TEMPERATURE (-10 TO +70°C). LO=10 GHz, USB
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3 0.95 1.05 1.15 1.25 1.35 1.45 1.55
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
LO = 5 GHz
LO = 10 GHz
LO = 19.5 GHz
LO = 10 GHz
LO = 18.5 GHz
LO = 5 GHz
+70°C
-10°C
OUTLINE DRAWING
GENERIC SYSTEM MODEL 136460
1.945 [49.40]
3.458 [87.83]
0.989
[25.12]
5.575
[141.61]
J4
J5
J6
J7
J8
J9
J10
J11
J12
J18J17J16
J15
J3
J14
J2
J1
J13
0.612
[15.54]
0.225 [5.72]
1.156
[29.36]
1.700
[43.18]
2.244
[57.00]
2.788
[70.82]
3.332
[84.63]
3.876
[98.45]
4.420
[112.27]
4.964
[126.09]
0.410 [10.41]
0.250
[6.35]
0.625 [15.88]
"SMA" FEMALE CONECTORS
TYP. (15) PLACES
0.125 [3.18]
DIA. THRU TYP. (6) PLACES
0.709
[18.01]
1.603
[40.72]
2.341
[59.46]
3.973
[100.91]
4.867
[123.62]
0.250 [6.35] TYP.
0.125
[3.18] 0.125
[3.18]
4.275 [108.59]
2.675 [67.95]
0.150
[3. 81]
0.410 [10.41]
3.235
[82.17]
MITEQ MULTIPLEXER 1-5
3-21
GHz
ANTENNA
100 -
2500 GHz
1ST LO
5 RECEIVERS
AMP1
CAL PORT
CAL
SOURCE
VOLTAGE TO
FREQ.CONVERTER
V-F
CHANNEL
450 MHz
3-21 GHz
1300 MHz BW
TO DOWNCONVERTER
2ND LO
5-19.5 GHz
CW
IF OUT
250 -
1550 MHz
IF OUT
MITEQ 136460 DOWNCONVERTER
RF IN MXR LPF1 AMP1 AMP2
CAL IN
OUT2
OUT1
EQL
LSB=0.5dB
6 BIT
LO IN
ATN
GENERAL NOTES:
1. Dimensions shown in brackets [ ] are in millimeters.
2. Tolerance as follows: .xx = ±0.01 [.xx = ±0.25], .xxx = ±0.005 [.xxx = ±0.13]
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