Low-leakage automatic adjustable diplexer

A low-leakage automatic adjustable diplexer, comprising:

• a body comprising a first casing and a second casing which are in contact with each other, wherein a graphical structure is concavely disposed on each of two contact sides of the first and second casings and forms a plurality of cuboid waveguide channels including a feeding portion, a reception port portion for receiving waveguide signals, a transmission port portion for transmitting waveguide signals, a fitting portion connected to the feeding portion, a first filtering portion connected between the reception port portion and the fitting portion, a second filtering portion connected between the transmission port portion and the fitting portion, first electromagnetic energy conversion units connected to two ends of the first filtering portion, respectively, and second electromagnetic energy conversion units connected to two ends of the second filtering portion, respectively, wherein, each electromagnetic energy conversion units converts the electromagnetic energy of the signal input to the corresponding filtering portion from an original form to another form, and then converts the electromagnetic energy of the signal output from the corresponding filtering portion back to the original form, the original form is perpendicular to the another form;
• a thin plate clamped by and between the first casing and the second casing and comprising a first hollowed-out portion corresponding in position to the first filtering portion and a second hollowed-out portion corresponding in position to the second filtering portion;
• and
• two resonant regulators disposed on two sides of the body, respectively, and each having a plurality of frequency disturbance elements adjustably protruding into the first and second filtering portions of the body, wherein each said frequency disturbance element penetrates an H-side sidewall of the corresponding cuboid waveguide cavity,
• wherein, in the cuboid waveguide channels in the body, a type-I E-side sidewall of the cuboid waveguide cavity defines the feeding portion, the reception port portion, the transmission port portion, and the fitting portion, and a type-II E-side sidewall of the cuboid waveguide cavity defines the first filtering portion and the second filtering portion, wherein the type-I E-side sidewall of the cuboid waveguide cavity and the type-II E-side sidewall of the cuboid waveguide cavity are perpendicular to each other.