An Octagonal Ultra-Wideband Microstrip Filter Based on Defective Ground Structure
A technology of microstrip filter and defective ground structure, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of complex structure design, large filter size, unfavorable integration, etc., and achieve fourth harmonic suppression, Good out-of-band suppression characteristics, easy design and integration effects
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[0034] figure 1 As shown, the octagonal ultra-wideband microstrip filter based on the defective ground structure in this embodiment includes an upper signal layer 1 , an intermediate metal ground layer 2 , and a bottom signal layer 3 arranged in sequence from top to bottom. Such as figure 2 As shown, the upper signal layer 1 includes a dielectric substrate 8, a first input / output port 4, a second input / output port 7, a first octagonal transmission unit 5, a second octagonal transmission unit 6, a first input / output port 4 is connected with the first octagonal transmission unit 5, the second input / output port 7 is connected with the second octagonal transmission unit 6, the first input / output port 4 and the first octagonal transmission unit 5 are connected with the second input / output port 7 and the second octagonal transmission unit 6 are symmetrically arranged left and right, and the dielectric substrate 8 is RO4350B with a dielectric constant of 3.66 and a thickness of 0.2...
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