Flat transmission multi-mode resonant cavity
A multi-mode resonant and flat technology, applied in the direction of resonators, electrical components, circuits, etc., can solve the problems of large microwave loss, influence of filter use effect, large fluctuation of filter transmission coefficient in-band, etc., to solve in-band fluctuating effect
Active Publication Date: 2012-10-03
鄄城县凤展木业有限公司
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- Application Information
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Problems solved by technology
Since the actual metal material constituting the resonant cavity is a non-ideal conductor, the high-Q operating mode has a greater loss of microwaves than other operating modes; when such a multi-mode resonant cavity constitutes a bandpass filter, the transmission of the filter The coefficient is in the passband, especially on the edge of the passband close to the transmission zero point, there will be "pits", which will lead to large fluctuations in the filter transmission coefficient, which will have a great impact on the use of the filter
Method used
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Embodiment 1
[0023] Such as figure 2 As shown, a flat transmission multimode resonant cavity includes a cavity 1 capable of exciting two working modes and a coupling structure, and an electric field metal post 2 arranged inside the cavity 1, wherein the cavity 1 is covered A microwave absorber 3 is arranged on the board.
[0024] The microwave absorber 3 is screw-shaped, arranged directly above the electric field metal body 2, and passes through the upper cover plate of the cavity 1 from outside to inside. The microwave absorber 3 is provided with a microwave loss layer 4 on the surface or inside, and the microwave loss layer 4 is made of non-metallic loss material, which is used to increase the loss of the strong coupling mode and make the in-band fluctuation inside the cavity 1 flat.
Embodiment 2
[0026] Such as image 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that there is no electric field metal post 2 in the cavity 1 of the flat multimode resonant cavity, and other structures are the same.
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The invention discloses a flat transmission multi-mode resonant cavity, which comprises at least one cavity and a coupling structure capable of motivating two or more working modes, wherein when an elThe invention discloses a flat transmission multi-mode resonant cavity, which comprises at least one cavity and a coupling structure capable of motivating two or more working modes, wherein when an electric field metallic object is arranged in the cavity, an upper cover plate of the cavity right above the electric field metallic object is also provided with a microwave absorber, and a microwave abectric field metallic object is arranged in the cavity, an upper cover plate of the cavity right above the electric field metallic object is also provided with a microwave absorber, and a microwave absorbing material is arranged on the surface or the inside of the microwave absorber. When the electric field metallic object is not arranged in the cavity, the microwave absorber is arranged at an elesorbing material is arranged on the surface or the inside of the microwave absorber. When the electric field metallic object is not arranged in the cavity, the microwave absorber is arranged at an electric field centralization position in certain working mode in the cavity. By improving the prior art, the flat transmission multi-mode resonant cavity overcomes the defects in the prior art so that tctric field centralization position in certain working mode in the cavity. By improving the prior art, the flat transmission multi-mode resonant cavity overcomes the defects in the prior art so that the fluctuation in band of the multi-mode resonant cavity is flattened. The flat transmission multi-mode resonant cavity belongs to a filter technique, and is mainly applied to electronic systems withhe fluctuation in band of the multi-mode resonant cavity is flattened. The flat transmission multi-mode resonant cavity belongs to a filter technique, and is mainly applied to electronic systems withvarious microwave bands, in particular to the fields of radar, communication, guided missile control and guide, and the like.various microwave bands, in particular to the fields of radar, communication, guided missile control and guide, and the like.
Description
technical field [0001] The invention relates to a multimode resonant cavity, in particular to a flat transmission multimode resonant cavity. Background technique [0002] Using a multimode resonator, a multimode filter can be constructed. Since the working mode of the resonant cavity that constitutes the multimode filter is generally not the fundamental mode with the lowest resonant frequency in the resonant cavity, the volume of the multimode resonant cavity is larger than that of the fundamental mode resonant cavity, and the Q of this multimode resonant cavity The value is higher than the Q value of the fundamental mode cavity at the same resonant frequency. The multi-mode resonant cavity used in the multi-mode filter has multiple working modes in the same resonant cavity, and these modes are coupled with each other to generate a zero point ratio between different single-mode cavities of an ordinary filter composed of a single-mode resonant cavity. The zero point generat...
Claims
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IPC IPC(8): H01P7/06
Inventor 翟彦芬王清源康己元
Owner 鄄城县凤展木业有限公司