CST – Computer Simulation Technology

Piecewise Linear pline-Profiled Pyramidal Horn

Image of the Piecewise linear (PWL) spline-profiled pyramidal horn Image of the Piecewise linear (PWL) spline-profiled pyramidal horn

The geometry of a rectangular horn is more suitable for array applications as the geometrical efficiency within the array cell is higher compared to a circular horn. Conventional pyramidal horns have an aperture efficiency of approximately 50 %, but it is possible to achieve efficiencies close to 100 % by optimizing the flare profile and, in turn, improve overall array efficiency. The piecewise linear spline profiled horn described here achieves an aperture efficiency of approximately 80 %.

The horn consists of a rectangular waveguide section, a mode converter and a pyramidal flare. The mode converter consists of five PWL (piecewise linear) sections followed by the pyramidal flare to reach a specified aperture size.

The bandwidth for the PWL spline profiled horn the bandwidth is less than a conventional pyramidal horn as it is limited by the pattern performance. For gains higher than 18 dBi the overall length is less than a conventional horn of the same gain....

Typical radiation pattern at the center frequency Typical radiation pattern at the center frequency Normalized radiation pattern cuts at the center frequency Normalized radiation pattern cuts at the center frequency

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