‰  NOW 25 WPM  ‰  TEXT IS FROM OCTOBER 2012 QST  PAGE 44‰

DELAY LINE IS CONNECTED TO A SECOND PORT OF THE COMBINER AMPLIFIER.  THE
OUTPUT SIGNAL FROM THE ARRAY IS DELIVERED FROM THE COMBINER AMPLIFIER TO
THE RECEIVER.  THE ARRAY OPERATES USING THE TRUE TIME DELAY PRINCIPLE OF
OPERATION BY COMBINING SIGNALS FROM LOOP 1 WITH DELAYED SIGNALS FROM LOOP
2.  USING THIS PRINCIPLE, A TIME DELAY DIFFERENCE IS SELECTED SO THAT
SIGNALS ARRIVING FROM A DIRECTION THAT IS OPPOSITE THE FAVORED DIRECTION,
WHEN COMBINED, ARE MAXIMALLY ATTENUATED.  IF THE ARRAY IS CONFIGURED IN
THIS MANNER, SIGNALS ARRIVING FROM THE FAVORED DIRECTION ARE ATTENUATED
LESS THAN SIGNALS COMING FROM OTHER DIRECTIONS.  THIS DIRECTIONAL EFFECT IS
LARGELY FREQUENCY INDEPENDENT UP TO A MAXIMUM FREQUENCY.  THE ARRAY ALSO
BENEFITS FROM ITS EMPLOYMENT OF ELECTRICALLY SMALL LOOP EMEMENTS THAT
EXHIBIT A PROFOUNDLY BIDIRECTIONAL CHARACTERISTIC, WITH LOBES OFF OF THEIR
ENDS AND SHARP NULLS TO THEIR BROADSIDE.  THE COMBINATION OF THE SMALL LOOP
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ