Recent news: in the UK, more stations have just managed to get hold of the surplus 49GHz 100mW Gunn sources, so we should soon see some more activity? The stations include G0CZD, G3PHO and G8AGN.

The 47GHz is of particular interest to G4KNZ, who is operational with wideband FM gear, and building narrowband gear.

Some information is available on the following subjects:

• 47GHz  operators and gear: Martlesham, 9 November 1997 
• 47GHz operator photo-gallery
• 47GHz Activity
• G4KNZ's wideband FM equipment - a detailed examination.
• G4KNZ's 47GHz QSOs
• 47GHz narrowband ... current equipment
• Standard waveguide sizes for 24 and 47GHz
• Have you considered using WG22 on this band?
• Building 47GHz narrowband equipment (not yet available)
• Path loss calculations (not yet available)
• Antennas for 47GHz (not yet available)
• PCBs for 24 and 47GHz

More information

• "Getting started on 47GHz", by Steve Davies G4KNZ, Sandown VHF Convention 1995 - Microwave Lectures and other papers, February 1995.
• "47GHz Transverter", by Michael Kuhne DB6NT, Dubus Tecknik IV, 1995.
• "46GHz Active Doubler", by Toshi Takamizawa JE1AAH, Proceedings of Microwave Update ‘95, ARRL, October 1995.
• "Weinheim 93 notes" by HB9MIN, which included: a 23.5 to 47GHz doubler using two BAT14 diodes (+7dBm output), a 47GHz rat race mixer description, and a three stage PHEMT amplifier for 47GHz.

RETURN TO FRONT PAGE