公开(公告)号：US20220352650A1

公开(公告)日：2022-11-03

申请号：US17436181

申请日：2019-03-04

Applicant: SAAB AB

Inventor： Ola FORSLUND

IPC: H01Q25/04 ,  H01Q15/22 ,  H01P1/213 ,  H01P1/16 ,  H01Q13/02

Abstract: Provided is a dual-band multimode antenna feed for a high-frequency band and a low-frequency band. The feed includes four high-frequency waveguide ports, where each high-frequency waveguide port is connected to a respective high-frequency input/output waveguide. Each high-frequency input/output waveguide includes a high-frequency waveguide aperture facing a first section for mixing electromagnetic modes in the E-plane. The first section is connected to a second section for mixing electromagnetic modes in the H-plane. The feed further includes a low-frequency waveguide port connected to a low-frequency input/output waveguide. A filter is arranged inside the first section to be transparent for plane wave modes exhibited at lower frequencies and reflecting for plane wave modes exhibited at higher frequencies.