ARLA/CLUSTER: Primeiro contacto no Reino Unido em 122 GHz

[João Costa > CT1FBF]

First UK contact in 122 GHz band

The first UK contact in the 122 GHz band took place Sunday, July 17 at 1345
UT between *Roger Ray G8CUB/P* and *Chris Whitmarsh G0FDZ/P*, both stations
located at Hackpen, Wiltshire (IO91CL)

In the UK Microwave Group Yahoo Group Chris G0FDZ writes:

The distance was 120m and the CW reports were 599 both ways.
An earlier attempt at 5km failed for a two way QSO. As well as signals on
134 GHz, of which only a very weak one way QSO was possible on that band,
only the merest hint of a signal on 122 GHz was heard. The 122 GHz band is
noted for its high signal attenuation due additionally to atmospheric
oxygen as well as water vapour attenuation.

The weather during the contest gave high humidity, and absorption of all
millimetre wave frequencies was considered by many to be high. Although
signals over the short distance were very good an attempt will be made soon
over 1.5kms. Power levels were 70uW for Chris G0FDZ and 300uW for Roger
G8CUB. One feature of G0FDZ’s system was the use of a slab type mixer which
has been recently developed to make millimetre wave mixers easier to
construct.

With a QSO being achieved on this band it means that every allocated UK
band has now has had at least one contact.

A full report on the QSO and progress will appear in the UK Microwave
Groups Scatterpoint newsletter, and photos and video will be available soon.

Issues of Scatterpoint before 2015 are available for free download, see
http://scatterpoint.org/

UKuG membership is free to students under 21
http://www.microwavers.org/index.htm?ukugmemb.htm
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