Improving the Performance of Profiled Conical Horn Using Polynomial Interpolation and Targeting the Region of Interest

Abstract

Abstract-In this paper, design of a profiled conical horn using piecewise biarc hermite polynomial interpolation is proposed. In order to improve the performance of the horn, a novel concept of 'targeting the Region of Interest (RoI)' is used. The target specifications are decided based on the applicability of the horn in a reflectometry system for plasma diagnostics (D-band). Apart from the design details, the simulated results of the proposed horn are covered.

Profiled Horn Antenna with Wideband Capability Targeting Sub-THz Applications

“…In Reference [16], the authors of this paper have presented the preliminary design of the profiled horn antenna using Hermite polynomial interpolation approach. The geometry for the same is shown in Figure 1.…”

“…However, due to a complex mode-converter structure, the radial corrugated horn design becomes challenging especially at millimeter and submillimeter waves [9] and terahertz frequencies [10]. Some of the alternative solutions are axial corrugated horn [11,12], hybrid corrugated horn [13,14], spline profiled horn [9,15], and horn antennas designed using interpolation [16]. All such configurations have their merits and drawbacks in terms of performance, fabrication complexity, cost, computational effort, etc.…”

“…Geometry of the proposed profile smooth circular waveguide horn (with 2 node points) designed using biarc Hermite polynomial interpolation with principal unit normal vector points as (x 1 , y 1 ) = (x 2 , y 2 ) = (0, 1); r in = 0.8 mm; r ap = 8.50 mm; L = 50 mm for a center frequency of 140 GHz[16].…”