| 摘要 |
A horn antenna for a radar device comprises a metal body (1) having a tubular hollow waveguide section (2) which opens into a hollow horn section (3), a dielectric filling body (7) filling up the inner space of the horn section (3), and a dielectric cover (16). To provide a horn antenna designed to protrude in a measurement environment, protected from highly aggressive process environments and usable over a wide temperature range,
- a circumferential gap (10) is provided between the inner surface of said horn section (3) and the outer surface of said filling body (7),
- the dielectric filling body (7) comprises a cylindrical section (8) which is slidably engaged within the tubular waveguide section (2), and
- the end portion of the filling body (7) is provided with a collar (12) which extends over the edge of the horn aperture and is supported via a spring (14) against a shoulder (15) provided on the metal body (1), said spring (14) pressing the filling body (7) against the cover (16). |
