Millimeter Wave Measurements - NTMS
Millimeter Wave Measurements - NTMS Millimeter Wave Measurements - NTMS
W5HN 1 m Winegard Offset Fed Dish with W2IMU Feedhorn built by WA5JAT NF = 8.5 dB (1763K) North Texas NTMS Microwave Society Sun Noise / cold sky = 3.8 dB w / W2IMU Feedhorn 1 dB w / WR-10 Feedhorn SFI = 82, 1, 1 Moon Noise / cold sky = 0.2 dB 50Ω/ cold sky = 0.3 dB, NF = 8.5 dB, Ta = 153 K Not Optimized Yet! Theoretical 3 dB BW = .3 degree & G~ 56 dBi WWW.NTMS.ORG 36
W5HN Lessons Learned North Texas NTMS Microwave Society • This is not going to be easy! • An isolator on the noise source is a must to reduce measurement error – nothing really new here…we knew that from our low frequency work over the years that an isolator or a 10 dB pad would help improve measurement accuracy • It appears that the LNA requires an input tuner and maybe even an output tuner – not a big deal, a few screws in a piece of WR-15 and we are ready for tuning….. • Returned a couple of units to Tom WA1MBA for verification on noise figure……standing by for a report… WWW.NTMS.ORG 37
- Page 1 and 2: W5HN North Texas NTMS Microwave Soc
- Page 3 and 4: W5HN HP 8757 Scalar Analyzer North
- Page 5 and 6: W5HN 40 to 60 GHz Test Setup North
- Page 7 and 8: W5HN 8757 40 to 60 GHz S21 & S11 No
- Page 9 and 10: W5HN W0EOM SMT S90-1240 Amplifier R
- Page 11 and 12: W5HN W5LUA Wiltron 3 dB Attenuator
- Page 13 and 14: W5HN Hughes WR-15 Noise Figure Test
- Page 15 and 16: W5HN WR-15 30 dB Attenuator North T
- Page 17 and 18: W5HN RF Input Level for LNA Tests N
- Page 19 and 20: W5HN WA1MBA LNA#4 North Texas NTMS
- Page 21 and 22: W5HN WA1MBA LNA #6 North Texas NTMS
- Page 23 and 24: W5HN North Texas NTMS Although DSB
- Page 25 and 26: W5HN OE9PMJ 47 GHz BPF Retuned to 7
- Page 27 and 28: W5HN Barry’s New Baby - A 75 to 1
- Page 29 and 30: W5HN WA1MBA 78 GHz LNA#6 with W/G T
- Page 31 and 32: W5HN LNA#5 with Input Tuner - 8/29/
- Page 33 and 34: W5HN GR-1216 & GR-1236 IF Amplifier
- Page 35: W5HN 2.4 m Fiberglass Offset Fed Di
- Page 39 and 40: W5HN 50 GHz 2.4mm detector with tra
- Page 41 and 42: W5HN 78 GHz XVTR with new LNA ! Nor
- Page 43 and 44: W5HN To the Moon, Alice! North Texa
- Page 45 and 46: W5HN 1 m Winegard Offset Fed Dish w
- Page 47 and 48: W5HN North Texas NTMS Noise Figure
- Page 49: W5HN North Texas NTMS Microwave Soc
W5HN<br />
Lessons Learned<br />
North<br />
Texas<br />
<strong>NTMS</strong><br />
Microwave<br />
Society<br />
• This is not going to be easy!<br />
• An isolator on the noise source is a must to reduce<br />
measurement error – nothing really new here…we knew<br />
that from our low frequency work over the years that an<br />
isolator or a 10 dB pad would help improve<br />
measurement accuracy<br />
• It appears that the LNA requires an input tuner and<br />
maybe even an output tuner – not a big deal, a few<br />
screws in a piece of WR-15 and we are ready for<br />
tuning…..<br />
• Returned a couple of units to Tom WA1MBA for<br />
verification on noise figure……standing by for a report…<br />
WWW.<strong>NTMS</strong>.ORG 37
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