24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward...

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W5HN North Texas Microwave Society NTMS WWW.NTMS.ORG 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

Transcript of 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward...

Page 1: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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24 and 47 GHz EMEBy

Al Ward W5LUABarry Malowanchuk VE4MA

2008 EME ConferenceFlorence, Italy

Page 2: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Outline

• 24 and 47 GHz at W5LUA – past andfuture

• New activity on 24 GHz• Activity on 47 GHz?• Higher?

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First 24 GHz EME QSOW5LUA VE4MA

First QSO took place on August 18, 2001Stations also making QSOs within a few years of this early time period includedRW3BP, VE7CLD, AA6IW, OK1UWA

Page 4: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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24 GHz 3M Dish with Back Structureat W5LUA

Page 5: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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W5LUA 24 GHz Feed System

Page 6: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Homebrew 24 GHz LNAs

Page 7: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Retuning TWTs for 24 GHz

• More conventional Helix TWTs have betterchance of going up in frequency

• Normally a drop in helix voltage will improveperformance at higher frequency

• Waveguide tuning can also enhanceperformance

• Magnets can provide surprising results!

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VTU-6191 14 GHz TWT

Band-Switched for10 and 24 GHz!

Page 9: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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First 24 GHz Echoes at W5LUAMarch 7, 2001

Page 10: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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TH-3864C TWT

Page 11: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Varian VPW-2931TWT Power Supply

Page 12: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Stations making QSOs on 24 GHz EME

• Early VE4MA, W5LUA, RW3BP, VE7CLD,AA6IW, OK1UWA on 24192 MHz

• Activity has migrated from 24192.1 MHz to24048.1 MHz

• Present activity includes VE4MA, W5LUA,G4NNS, LX1DB, DK7LJ, DF1OI, OK1KIR,PA0EHG

• Others include DL7YC, IQ4DF, DK3UC

Page 13: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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3M Dish at LX1DB

Page 14: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Combining Power at LX1DB

Page 15: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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2.4M Offset Fed Dish with subreflector, 40W RW1127 @ DF1OI

Page 16: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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W5LUA 2.4M Offset Fed Dish withyoungest grandson

Page 17: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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W5LUA 2.4M Offset Fed Dish with24 GHz XVTR at Feed

Page 18: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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WR-42 Relay, 24 GHz LNA and24 GHz W1GHZ Feedhorn

Page 19: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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W5LUA Shack with SDRs

Page 20: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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SDR-1000 on 24 GHz EME

Page 21: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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47 GHz EME

• First QSOs took place in theJanuary/February 2005 time framebetween RW3BP and AD6FP and W5LUA

• Later in 2005, additional QSOs took placebetween VE4MA and AD6FP and RW3BP

• No activity since 2005• RW3BP software instrumental in providing

needed S/N on receive

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W5LUA 47 GHz XVTR at Feed of2.4M Offset Fed Dish

Page 23: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Hughes 32 Watt TWT for 45 GHz

Page 24: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Arcing Problems with TWT

Arc’s herewhen lidis down

Page 25: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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TWT Power Supply

Page 26: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Using Zener Diodes to Set CorrectCollector Voltages

Page 27: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Doppler Calculation & RX Tuning

Page 28: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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NTMSReceiving RW3BP at W5LUA

Page 29: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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NTMSRW3BP Sending 73’s to W5LUA

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What’s Next?

Page 31: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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RW3BP at 77.5 GHz

•NF=6.6dB DSB2.4M Offset Fed DishSun Noise 5.8 dBMoon Noise 0.5dB

Page 32: 24 and 47 GHz EME - NTMS · W5HN North Texas Microwave Society NTMS 1 24 and 47 GHz EME By Al Ward W5LUA Barry Malowanchuk VE4MA 2008 EME Conference Florence, Italy

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Thank You

Powerpoint Slides will be available atwww.ntms.org

73Al Ward W5LUA

[email protected] Malowanchuk VE4MA

[email protected]


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