A nonresonant endfire array for VHF and UHF

A new type of endfire array is described which has moderate bandwidth in the vhf and uhf ranges. Two types of arrays are dealt with; one, an unbalanced type fed with a coxial line, which was studied primarily to test the theory of operation of the antenna; the other, a balanced type fed with unshielded twin-line, which was developed as a receiving antenna for vhf television. This latter antenna has a gain varying from 6 db to 10 db above a dipole over a 50 per cent frequency range, and produces a voltage standing wave ratio of not greater than 2.5 to 1 on 300-ohm twin lead.