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 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. ELECTRICAL SPECIFICATIONS RF INPUT PARAMETERS Frequency range IF/RF VSWR LO frequency range LO power LO VSWR CONDITION IF OUTPUT PARAMETERS Number of IF outputs Operating range RF-to-IF gain Digital attenuator control step size Digital attenuator Output power (1 dB compression) Calibration port coupling value Coupling flatness VSWR CONDITION Per channel OTHER PARAMETERS LO-to-RF isolation LO-to-IF isolation Connectors, RF, IF, LO Connectors, DC, control Supply voltage DC power consumption for each downconverter Weight At maximum gain 6-BIT control 250-1550 MHz 250-1550 MHz CONDITION MIN. 3.2 UNITS MIN. MHz dB dB dB dBm dB dB Ratio 250 UNITS dB dB MIN. 20 30 1 per channel At 5 V per channel At -5 V per channel ENVIRONMENTAL CONDITIONS Operating temperature . . . . . . . . . . 10 to 60C Storage temperature . . . . . . . . . . . -25 to +60C 27 UNITS GHz Ratio GHz dBm Ratio Volts mA mA Grams TYP. MAX. 21.2 1.5:1 4.8 10 19.5 16 2.5:1 TYP. 2 MAX. 1550 25 0.5 0 -1 31.5 0 16 1 1.5:1 TYP. 30 40 SMA 15-pin, micro D 5 165 2 400 MAX. Vibration . . . . . . . . . . . . . . . . . . . . 6.5 Gs RMS, 20-2000 Hz Radiation . . . . . . . . . . . . . . . . . . . . 30 krads, total DOSP MODEL 136460 TYPICAL DATA CHANGE IN GAIN FROM ROOM TEMP. (+25C) (dB) GAIN VARIATION VS. TEMPERATURE (-10 TO +70C). LO=10 GHz, USB 3 2.5 2 1.5 +70C 1 0.5 0 -0.5 -1 -1.5 -2 -10C -2.5 -3 0.25 0.35 0.45 0.55 0.65 0.75 0.85 0.95 1.05 1.15 1.25 1.35 1.45 1.55 IF FREQUENCY (GHz) IF RESPONSE, LSB, ATTEN. SETTING = 7 dB 22 21 21 20 LO = 5 GHz GAIN (dB) GAIN (dB) IF RESPONSE, USB, ATTEN. SETTING = 7 dB 22 19 18 LO = 10 GHz 17 LO = 19.5 GHz 16 LO = 5 GHz 20 LO = 10 GHz 19 18 17 LO = 18.5 GHz 16 15 15 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 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 IF FREQUENCY (GHz) IF FREQUENCY (GHz) FUNCTIONAL BLOCK DIAGRAMS GENERIC SYSTEM MITEQ MULTIPLEXER 1-5 ANTENNA MODEL 136460 MITEQ 136460 DOWNCONVERTER IF OUT 250 1550 MHz IF OUT CAL PORT AMP1 3-21 GHz 2ND LO 5-19.5 GHz CW 100 2500 GHz RF IN LPF1 AMP1 LSB=0.5dB 6 BIT EQL OUT1 AMP2 ATN OUT2 3-21 GHz CAL 1300 MHz BW SOURCE TO DOWNCONVERTER 1ST LO 5 RECEIVERS MXR CAL IN LO IN 450 MHz VOLTAGE TO FREQ.CONVERTER V-F CHANNEL OUTLINE DRAWING 0.410 [10.41] 0.150 [3. 81] 0.125 [3.18] 0.125 [3.18] 4.275 [108.59] 2.675 [67.95] 0.250 [6.35] 0.625 [15.88] 0.410 [10.41] 0.250 [6.35] TYP. J4 J1 4.964 [126.09] J5 4.867 [123.62] J13 3.973 [100.91] J6 J2 J7 J8 3.235 [82.17] J14 2.341 [59.46] J9 J3 J15 0.709 [18.01] 5.575 [141.61] J10 J11 1.603 [40.72] 4.420 [112.27] 3.876 [98.45] 3.332 [84.63] 2.788 [70.82] 2.244 [57.00] J12 J16 0.125 [3.18] DIA. THRU TYP. (6) PLACES 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] J17 J18 0.989 [25.12] 1.945 [49.40] 3.458 [87.83] 1.700 [43.18] 1.156 0.612 [29.36] [15.54] 0.225 [5.72] "SMA" FEMALE CONECTORS TYP. (15) PLACES 28