A Packaged Antenna for Short-Hop Microwave Radio Systems
01 July 1969
When considering antenna designs suitable for short-hop microwave radio relay application, the more important factors are: low side and rear lobe radiation for suppressing radio interference, reasonably good aperture efficiency, and a structural design which permits inexpensive and simple fabrication. 1 In addition, the antenna should have symmetry permitting the use of orthogonal polarizations for increased channel capacity. Other considerations include a suitable enclosure for the antenna and electronic equipment and provisions for initial radio beam alignment. A supporting structure is required which is high enough to permit radio beam clearance over natural and manmade obstacles, is pleasing in appearance and low in wind loading, and has sufficient structural stiffness to prevent excessive radio beam tilting in heavy wind. 1605 1606 THE BELL SYSTEM TECHNICAL JOURNAL, JULY-AUGUST 1969 This paper describes such an antenna system which is used in a I.5-mile experimental repeater installation in New Jersey operating at 11 GHz with transmitting and receiving terminals located on Crawford Hill and a repeater at Bell Laboratories property in Holmdel.