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BELL SYSTEM TECHNICAL JOURNAL 



antenna gain to a maximum, after which spurious lobes become of 

 importance. Fig. 8 suggests that the spacing, giving optimum gain, 

 would be the desideratum in antenna design. However, this is not 



24 

 22 

 20 



18 



UJ 



? 14 



U 



LU 



Q 12 



Z 



- 10 



z 



< 8 



o 



6 



4 



2 







16 20 24 



NUMBER OF COUPLETS 



Fig. 7 — Antenna arrays. Calculated gains vs. number of couplets. 



0.3 0.4 0.5 0.6 0.7 



FRACTIONAL WAVELENGTH SPACING 



Fig. 8 — Antenna arrays. Calculated gains vs. lateral spacing between couplets. 



necessarily the case, as we shall presently see. It has already been 

 pointed out that the over-all length of array, rather than the spacing 

 or the number of conductors per unit length, constitutes the most 



