PROBLEM 



Develop techniques for wide-frequency spectrum, agile-beam antennas 

 for radar. Determine elevation-scanning limitations of cylindrical configurations, 

 and study techniques for achieving pencil beams from such configurations. 



RESULTS 



1. Several linear and ring-array beam-forming techniques were examined, as 

 part of the investigation directed at achieving pencil-beam antennas from cylindri- 

 cal configurations. 



2. The SAMB (Stationary Aperture Moving Beam) and CARAMBA (Circular- 

 Array Radar Agile Moving Beam Antenna) concepts show promise for extension to 

 cylindrical configurations; the SAMB program yields excellent characteristics over 

 a 25-percent frequency band and individual beam-pointing angles do not change 

 with frequency. Low-side-lobe ring arrays are achievable by means of 

 CARAMBA techniques. 



3. Preliminary computer predictions indicate that a combination of the lens- 

 feed technique and a linear array as an element of a ring array is a possible 

 method of enabling a cylindrical array to produce a pencil beam. Some preliminary 

 performance predictions are included. 



MBL/WHOI 



D301 00M0SM3 7 



