#$%^&*AU2020102309A420201029.pdf#####ABSTRACT The invention discloses a SIW plane filter, which comprises the top metal foil, the dielectric plate and the bottom metal foil. The left side of the top metal foil is provided with the left port microstrip lead line, while the right side is provided with the right port microstrip lead line, and the left port microstrip lead line and the right port microstrip lead line shift relative to the horizontal center line. The top metal foil is provided several first metal vias around. The left side of the center of the top metal foil is provided with the left metal via and the right side is provided with the right metal via. The vertical center line of the top metal foil is provided with a plurality of central metal vias. The surface of the top metal foil is provided with the left gap slot, the right gap slot, the upper left metal via and the upper right metal via. The first metal via, the right metal via, the central metal via, the upper left metal via and the upper right metal via all run through the dielectric plate and the bottom metal foil. The invention has the advantages of small volume, light weight, low signal transmission loss, low insertion loss and high return loss, and improves transmission performance.3/3 0-52-10 -15 00i 0- -20(2, -25-40510 15 Frequency [GHz Figure56
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