agilent 8490g coaxial attenuators technical overview key specifications maximize your operating frequency range for dc to 67 ghz application minimize your measurement uncertainty with low swr of 1.45 up to 67 ghz improve your measurement confidence with excellent attenuation accuracy the agilent 8490g family is a line of precision fixed coaxial attenuators with performance specified up to 67 ghz. these attenuators use the 1.85 mm coaxial connector, and exhibit excellent swr and accuracy performance from dc to 67 ghz. the 8490g family has attenuation values of 3, 6, 10, 20, 30 and 40 db. the agilent 8490g family of 1.85 mm fixed coaxial connectors are assembled and tested with the same meticulous care as their lower frequency counterparts: the agilent 8490d, 8491 and 8493 families. these attenuators are tested on agilent precision network analyzers to assure full specifications over their entire frequency range.
ruggedness, reliability and small size make these attenuators suitable for use on bench as well as on system level. with their accuracy and low swr, they are ideally suited for extending the range of sensitive power meters for high power measurements. the same characteristics lend themselves to applications such as calibration standards and rf substitution measurements. with their broad dc to 67 ghz frequency range and reasonable cost, general applications such as the reduction of power level to sensitive components and instrumentation systems are attractive and appropriate uses for these attenuators. specifications describe the instrument s warranted performance over the temperature range 0 c to +55 c (except where noted). supplemental and typical characteristics are intended to provide typical but non-warranted performance parameters. these are denoted as ?ypical? ?ominal? or ?pproximate? frequency range dc to 67 ghz impedance (nominal) 50 ? connectors 1.85 mm power (maximum) 1 w average applications specifications 2 attenuation (db) = insertion loss atten. data uncert. (db) options min (ghz) max (ghz) max (ghz) max (ghz) (ghz) 0 to 67 0 to 26.5 26.5 to 50 50 to 67 0.4 to 67 8490g 003 2.5 3.9 4.4 4.8 ?.3 8490g 006 5.4 6.9 7.4 7.8 ?.3 8490g 010 9.4 10.9 11.1 11.3 ?.3 8490g 020 19.2 21.3 21.5 21.7 ?.3 8490g 030 29.2 31.3 31.5 31.7 ?.3 8490g 040 38.0 42.5 42.5 42.5 ?.6 swr (maximum) return loss (db) attenuation (ghz) (ghz) (ghz) (ghz) (ghz) (ghz) option 0 to 26.5 26.5 to 50 50 to 67 0 to 26.5 26.5 to 50 50 to 67 8490g-003 1.15 1.25 1.45 23.1 19.1 14.7 8490g-006 1.15 1.25 1.45 23.1 19.1 14.7 8490g-010 1.15 1.25 1.45 23.1 19.1 14.7 8490g-020 1.15 1.25 1.45 23.1 19.1 14.7 8490G-030 1.15 1.25 1.45 23.1 19.1 14.7 8490g-040 1.10 1.15 1.25 26.4 23.1 19.1
3 environmental specifications mechanical dimension the 8490g is designed to fully comply with agilent technologies?product operating environment specifications. the following summarizes the environmental specifications for these products. temperature operating 0 c to +55 c non-operating ?5 c to +85 c cycling ?5 c to +120 c, 10 cycles @ 20 c per minute, 20 minutes dwell time per mil-std-833f, method 1010.8, condition c (modified) humidity operating 50% to 95% rh @ 40 c, 24 hour cycling, 5 times. shock half-sine, smoothed 1000 g @ 0.5 ms, 3 shock pulses per orientation 18 total per mil-std-833f, method 2002,4, condition b (modified) vibration broadband random 50 to 2000 hz, 7.0 g rms, 15 minutes, per mil-std-833f, method 2026-1 (modified) altitude operating < 4,600 meters (15,000 feet) storage < 15,300 meters (50,000 feet) net weight 7.2 g (0.0158 lb) 3, 6, 10, 20 db 7.5 g (0.0165 lb) 30, 40 db 2 flats 180 apart 7 (0.275) across 7.6 (0.30) dimension a 3, 6, 10, 20 db: 27 (1.06) 30, 40 db: 28 (1.10) all dimensions are in millimeters (inches) a 8 (0.312) figure 1. 8490g product outline
4 supplement characteristics (typical) frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?.0 ?.5 ?.0 ?.5 ?.0 ?.5 ?.0 8490g-003 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 2. 8490g-003 typical insertion loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 ?0 8490g-003 return loss vs. frequency (typical) return loss specification return loss (db) figure 3. 8490g-003 typical return loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?.0 ?.5 ?.0 ?.5 ?.0 ?.5 ?.0 8490g-006 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 4. 8490g-006 typical insertion loss versus frequency
5 supplement characteristics (typical) ?ontinued frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 ?0 8490g-006 return loss vs. frequency (typical) return loss specification return loss (db) figure 5. 8490g-006 typical return loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?.0 ?.5 ?0.0 ?0.5 ?1.0 ?1.5 ?2.0 8490g-010 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 6. 8490g-010 typical insertion loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 ?0 8490g-010 return loss vs. frequency (typical) return loss specification return loss (db) figure 7. 8490g-010 typical return loss versus frequency
6 supplement characteristics (typical) ?ontinued frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?8.0 ?8.5 ?9.0 ?9.5 ?0.0 ?0.5 ?1.0 ?1.5 ?2.0 8490g-020 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 8. 8490g-020 typical insertion loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 8490g-020 return loss vs. frequency (typical) return loss specification return loss (db) figure 9. 8490g-020 typical return loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?8.0 ?8.5 ?9.0 ?9.5 ?0.0 ?0.5 ?1.0 ?1.5 ?2.0 8490G-030 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 10. 8490G-030 typical insertion loss versus frequency
7 supplement characteristics (typical) ?ontinued frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 8490G-030 return loss vs. frequency (typical) return loss specification return loss (db) figure 11. 8490G-030 typical return loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 ?7 ?8 ?9 ?0 ?1 ?2 ?3 8490g-040 insertion loss vs. frequency (typical) insertion loss specification insertion loss (db) figure 12. 8490g-040 typical insertion loss versus frequency frequency (ghz) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 ?0 ?0 ?0 ?0 ?0 ?0 ?0 8490g-040 return loss vs. frequency (typical) return loss specification return loss (db) figure 13. 8490g-040 typical return loss versus frequency
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