High-isolation high-power synthesizer based on air plate line

The invention relates to a high-isolation high-power synthesizer based on an air plate line, which comprises a metal plate line, a polytetrafluoroethylene support piece, a metal shell and a metal cover plate, and is characterized in that the metal shell and the metal cover plate are tightly screwed through screws to form a closed metal shielding cavity; and the metal plate wire is fixed and suspended in the metal shielding cavity through the polytetrafluoroethylene supporting piece. Good electrical performance of a traditional 90-degree bridge and high-power transmission characteristics of an air plate line are fully combined, the defect that a traditional dielectric substrate synthesizer is low in power resistance is overcome, the defects that coaxial and waveguide synthesizers are heavy in size and not prone to being in cascade connection with front-stage assemblies and rear-stage assemblies are overcome, and balance between high-power capacity and compact size is achieved. Meanwhile, the problem that the i