Electrically directable multi-band antenna

Claim 1

AN ELECTRICALLY DIRECTABLE ANTENNA SYSTEM FOR THE HIGH AND LOW VHF TELEVISION BANDS COMPRISING AN ANTENNA ARRAY HAVING AT LEAST FOUR RADIALLY DISPOSED HORIZONTAL ARMS WITH TERMINALS AT THEIR INBOARD ENDS, A SIGNAL TRANSMISSION LINE COMPRISING AT LEAST FOUR CONDUCTORS EXTENDING LONGITUDINALLY OF SAID LINE AND A UNITARY JACKET OF DIELECTRIC MATERIAL SURROUNDING AND MUTUALLY INSULATING SAID CONDUCTORS, SAID CONDUCTORS BEING ARRANGED IN PAIRS, THE CONDUCTORS OF EACH PAIR BEING UNTWISTED AND PARALLEL WITH RESPECT TO EACH OTHER AND SPACED BY A DISTANCE WHICH CONFORMS TO THE DESIRED CHARACTERISTIC IMPEDANCE OF SAID LINE, AND THE MEDIAN LINES OF THE RESPECTIVE PAIRS OF CONDUCTORS BEING SPACED BY A DISTANCE AT LEAST FOUR TIMES AS GREAT AS THE SPACING BETWEEN THE TWO CONDUCTORS OF ANY OF SAID PAIRS OF CONDUCTORS, EACH ARM BEING CONNECTED TO A CONDUCTOR OF SAID TRANSMISSION LINE, EACH SAID ARM BEING SUBSTANTIALLY CO-LINEAR WITH AT LEAST ONE OTHER OF SAID ARMS TO FORM A DIPOLE ANTENNA, SAID ARMS HAVING MEANS FOR CAUSING THE HALF POWER PRINCIPAL BEAM WIDTH OF THE HORIZONTAL RADIATION PATTERN OF EACH SAID DIPOLE ANTENNA TO BE BETWEEN APPROXIMATELY 75* AND 95* FOR FREQUENCIES IN SAID HIGH AND LOW VHF TELEVISION BANDS, AND SWITCH MEANS CONNECTED TO SAID SIGNAL TRANSMISSION LINE FOR CONNECTING AT LEAST TWO SELECTABLE ONES OF THE CONDUCTORS OF