Approximate curves simplify initial steps of antenna design. Maximum achievable directivity exponents plotted as functions of element spacing in wavelengths for equilateral triangular array of rectangular waveguides. Directivities and exponents calculated for circular waveguides, pyramidal horns, and other standard feeds. Designer quickly estimates element spacing necessary to achieve required directivity or directivity achievable.
Estimating Waveguide Feed Directivity and Spacing
NASA Tech Briefs ; 7 , 4
1983-10-01
Miscellaneous
No indication
English
Directional Coupler With Increased Directivity
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