Microstrip line-slot line structure-based ultra-wideband filter
A microstrip line and slot line technology, which is applied in the field of microwave passive devices, can solve the problems of low cost, highly integrated miniaturization, high processing cost, and complex structure that cannot be adapted to wireless communication systems, and achieves easy processing integration and processing costs. Low, strong anti-interference ability
Inactive Publication Date: 2017-03-08
NANJING UNIV OF SCI & TECH
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[0004] However, there are problems with this ultra-wideband filter: complex structure, high processing cost, and inability to adapt to the development of low-cost, highly integrated, and miniaturized modern wireless communication systems
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Embodiment 1
[0034] The three-dimensional structure of the ultra-wideband filter with notch characteristics based on the microstrip line-slot line structure is as follows: figure 1 As shown, the top view is as figure 2 As shown, the relevant dimensions and specifications are as follows image 3 shown. The dielectric substrate (101) used has a relative permittivity of 10.2, a thickness of 0.635 mm, and a loss tangent of 0.0035. The characteristic impedance of the microstrip line conduction band 11 at the input end and the microstrip line conduction band 21 at the output end are both 50 ohms, and their widths are both W 1 = 0.6 mm. The size parameters of the ultra-wideband filter with notch characteristics are as follows: W 1 =0.6mm, L 1 =16.4mm, W 2 = 1.4mm, L 2 =6.6mm, W3 = 0.4mm, L 3 =36.6mm, W 4 = 0.5mm, L 4 =5.77mm, W 5 = 0.3mm, L 5 =14.5mm, W 6 =2.5mm, L 6 =5mm, W 7 = 8mm, L 7 = 2.7mm, S 1 =0.1mm, S 2 = 0.1 mm. The overall area of the UWB filter with notch charact...
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Abstract
The invention discloses a microstrip line-slot line structure-based ultra-wideband filter, which comprises a rectangular dielectric substrate (101), wherein a metal ground plate (102) is arranged on the lower surface of the rectangular dielectric substrate (101); an input port feeder (1), an output port feeder (2), a stepped impedance resonator (4), a first open-circuit uniform transmission line of a terminal (5) and a second open-circuit uniform transmission line of the terminal (6) which are parallel to a narrow side of the dielectric substrate (101) are arranged on the upper surface of the dielectric substrate (101); a linear slot line (3) parallel to a wide side of the dielectric substrate (101) is arranged on the metal ground plate (102); two ends of the stepped impedance resonator (4) are connected with the metal ground plate (102) through plated-through holes; and the input port feeder (1) and the output port feeder (2) are equidistantly arranged at two sides of the stepped impedance resonator (4) respectively. The ultra-wideband filter disclosed by the invention has a good rectangle coefficient on a trapped wave, and is good in out-of-band rejection, simple in structure and low in processing cost.
Description
technical field [0001] The invention belongs to the technical field of microwave passive devices, in particular to an ultra-wideband filter based on a microstrip line-slot line structure with simple structure, low processing cost, selectivity at notches, and good out-of-band suppression. Background technique [0002] Ultra-Wideband (Ultral-Wideband, UWB) filter is an independent microwave passive device, which has wider filtering bandwidth, better in-band flatness and smaller group delay than ordinary filters. System interference is low. [0003] In order to make the ultra-wideband filter obtain a good rectangular coefficient at the notch and obtain better out-of-band suppression, the paper "Multiple Band Notched Filter Using C-Shaped and E-Shaped Resonator for UWBApplications" (Sandip Kumar, Ravi Dutt Gupta , Journal IEEE.Microwave And Wireless Components Letters, Vol.26, NO.5, May 2016) discloses an ultra-wideband filter with three notches based on C-type, E-type resonato...
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Login to View More IPC IPC(8): H01P1/203
CPCH01P1/20381
Inventor 徐海艳徐艳卉王雪道王建朋
Owner NANJING UNIV OF SCI & TECH