This invention discloses a miniaturized four-channel combining module based on the TE20 mode, belonging to the field of
millimeter-
wave power combining technology. It includes a layered upper cavity, a mezzanine, a lower cavity, and an RF unit. The RF unit comprises a TE10-TE20
waveguide distributor, two amplification branches, and a TE20-TE10
waveguide combiner. Each amplification
branch includes a TE20 mode filter, a
waveguide-
microstrip transition, a pair of
amplifier chips, and a
microstrip-waveguide transition connected sequentially. The TE10-TE20 waveguide
distributor and the TE20 mode filter are disposed in the upper and lower cavities. The waveguide-
microstrip transition, the pair of
amplifier chips, and the microstrip-waveguide transition are disposed on opposite sides of the mezzanine. The TE20-TE10 waveguide combiner is disposed in the upper cavity, the mezzanine, and the lower cavity. This invention utilizes a high-isolation waveguide
distributor / combiner to improve
branch isolation, shorten the combining path, and has a compact overall structure with advantages such as wide bandwidth,
high isolation, high combining efficiency, and
miniaturization.