Balanced UWB Bandpass Filter Based on Multimode Slot Line Resonator
A bandpass filter and resonator technology, applied in waveguide devices, sustainable communication technology, advanced technology, etc., can solve the problem of independent control of the second and third passband bandwidths, the inability to introduce multiple transmission poles, and the inability to Notch characteristic adjustment and other issues, to achieve the effect of improving out-of-band rejection performance, good common-mode rejection effect, and miniaturization
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Embodiment 1
[0024] Microwave filter is an important part of modern communication system, and the performance of the filter is related to the communication quality of the whole system. Most of the existing microwave filters are large in size, and with the increasing complexity of the modern electromagnetic environment, there is more noise interference outside the passband. The ultra-wideband multimode filter of the traditional microstrip technology has a narrow stopband and out-of-band selectivity. The disadvantages of poor quality and large size cannot meet the high performance requirements of ultra-wideband filters. Therefore, it is of great significance and practical demand to study ultra-wideband filters with good out-of-band rejection characteristics and miniaturization characteristics. Therefore, the present invention proposes a balanced broadband bandpass filter based on a multimode slot line resonator.
[0025] The invention is a balanced broadband band-pass filter based on multi-m...
Embodiment 2
[0032] The overall structure of the balanced broadband bandpass filter based on the multimode slot line resonator is the same as that of the first embodiment. 3:1-4:1 range. Two rectangular microstrip lines 3 that are mirror-symmetrical about the Y axis are printed between the microstrip bottoms of the two U-shaped microstrip lines 2, and the long side of the rectangular microstrip line 3 is parallel to the X axis, and the short side is parallel to the X axis. The axis is vertical, the aspect ratio of the two rectangular microstrip lines 3 is in the range of 1:1-2:1, the distance between the rectangular microstrip line 3 and the U-shaped microstrip line 2 is in the range of 0.1mm-0.5mm, the rectangular microstrip line 3 is in the range of 0.1mm-0.5mm. The microstrip line 3 is located on the same side as the U-shaped microstrip line 2 .
[0033] generally considered, see image 3 , L 1 The length represented is the length of the bottom of the microstrip, L 2 The length excl...
Embodiment 3
[0038] The overall structure of the balanced broadband bandpass filter based on the multimode slot line resonator is the same as that of Example 1-2. In this example, the aspect ratio of the microstrip bottom is 4.5:1, and the aspect ratio of the microstrip arm is 3.5:1 . Two rectangular microstrip lines 3 that are mirror-symmetrical about the Y axis are printed between the microstrip bottoms of the two U-shaped microstrip lines 2, and the long side of the rectangular microstrip line 3 is parallel to the X axis, and the short side is parallel to the X axis. The axes are vertical, the aspect ratio of the two rectangular microstrip lines 3 is 1.5:1, and the distance between the rectangular microstrip line 3 and the U-shaped microstrip line 2 is 0.25 mm.
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