Conical Horn Lens Antenna

Conical horn lens antenna is designed by mounting a dielectric lens (typically a plano-convex lens) at the aperture of a conical horn.

A conical horn lens antenna is designed by mounting a dielectric lens (typically a plano-convex lens) at the aperture of a conical horn. It converts spherical waves radiated by the horn into plane waves. With shorter overall length, wider bandwidth and lower sidelobes, it achieves high gain close to that of parabolic antennas. It is a classic compact high‑gain horn widely used in millimeter‑wave and high‑precision measurement scenarios.

Structure (Rear to Front)

Circular Waveguide Feed Section

Standard WR‑series circular waveguide with mode excitation, ensuring circular symmetry and low cross polarization.
Conical Horn Section

Smooth or corrugated conical horn, enabling seamless mode transition from waveguide to free space. Its length is reduced by 30%–50% compared with conventional horns at the same gain level.
Core Dielectric Lens
- Shape: Plano-convex lens (flat side facing the horn, convex side outward).
- Material: Low-loss dielectrics such as PTFE (), HDPE and foam ceramics.
- Installation: Closely fitted to the horn aperture, with focal length precisely matched to the horn phase center.

Working Principle (Spherical Wave to Plane Wave)

Ordinary Conical Horn: Spherical wavefront at the aperture causes inconsistent phase distribution, resulting in limited gain, high sidelobes and broad beamwidth.
Lens Loading: By dielectric refraction, divergent spherical waves are collimated into in‑phase plane waves, realizing equivalent aperture field homogenization and wave focusing.
Comprehensive Performance: Greatly enhanced gain, narrowed beamwidth, suppressed sidelobes, stable phase center and drastically shortened antenna overall dimension.

Specifications