DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
RELIABLE HIGH-FREQUENCY COMMUNICATIONS
DEVELOPMENT LABS INC LOS ANGELES CALIF
The development of a broadband dual-polarized TAHA antenna is described. Design criteria include provisions for a 51 bandwidth, moderate isolation between polarizations, and preservation of the interference-rejecting characteristics of the tapered aperture. T e multiple probe feed system was found to be the most feasible means of fulfilling the design requirements. Basic design requirements for this system are given. Studies of the effect of ground interference and axial elevation on the vertical plane patterns of the TAHA over ground are reported. Expressions are derived for similar calculations to include finite e rth conductivities, reflection coefficient, spherical phase front, and axial orientation of the antenna with respect to ground. Modifications of the La Plata TAHA based on model studies are proposed. Theoretical computations by Ledinegg of the radiation pattern characteristic of the 60 degree TAHA are shown to be in agreement with measured data. Author