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A Microstrip Power Divider Filter

A filter and microstrip technology, applied in waveguide-type devices, circuits, connecting devices, etc., can solve the problems of narrow bandwidth and low isolation of broadband power division filters, and achieve wide bandwidth, high isolation, and good selectivity. Effect

Inactive Publication Date: 2018-07-31
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In short, the existing problems in the prior art are: wideband power division filter with narrow bandwidth and low isolation

Method used

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  • A Microstrip Power Divider Filter
  • A Microstrip Power Divider Filter
  • A Microstrip Power Divider Filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The three-dimensional structure of a new microstrip power division filter 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 3.55, a thickness of 0.508 mm, and a loss tangent of 0.0035. combine image 3 , the various dimensions of the power division filter are as follows: W 1 =1.16mm,L 1 =6mm, W 2 =0.7mm, L 2 =12mm,L 3 =3.45mm,L 4 = 3mm, W 3 = 1mm, W 4 = 1.4mm, L 5 =11.3mm, L 6 =5mm, L 7 =10.3mm, L 8 = 3mm, L 9 =6mm, g=0.1mm, SL=26mm, SW=0.3mm, isolation resistance is 250 ohms. The overall area of ​​the microstrip power dividing filter is 38×22mm, and the corresponding guide wavelength size is 0.88λ g ×0.51λ g , where λ g is the guided wavelength corresponding to the center frequency of the passband.

[0061] The microstrip power divider filter in this example is modeled and simulated in the ...

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Abstract

The invention discloses a micro-strip power dividing filter. The filter comprises a metal grounding plate (2) pasted on a lower surface of a rectangular medium substrate (1), an input port feed line (3) pasted on an upper surface, a first output port feed line (41), a second output port feed line (42), a first groove line-microstrip transition structure (51), a second groove line-microstrip transition structure (52), a first E-shaped resonator (61), a second E-shaped resonator (62) and an isolation resistor (7). The first groove line-microstrip transition structure (51) and the second groove line-microstrip transition structure (52) are connected through the isolation resistor (7). The first E-shaped resonator (61) is located between the first groove line-microstrip transition structure (51) and the first output port feed line (41). The second E-shaped resonator (62) is located between the second groove line-microstrip transition structure (52) and the second output port feed line (42). The micro-strip power dividing filter possesses good selectivity and high isolation.

Description

technical field [0001] The invention relates to the technical field of microwave passive devices, in particular to a microstrip power dividing filter with good selectivity and high isolation. Background technique [0002] The power divider filter is an independent microwave passive device. In terms of function, it realizes the effective combination of the power divider and the filter in the radio frequency circuit, that is, the power divider filter has both the power distribution and filtering functions of the signal. Therefore, a high-performance power division filter can not only effectively reduce the size of the system, but also simplify the complexity of system design, thereby further realizing the low-cost, high-performance, and miniaturized design of the wireless communication system. In recent years, with the development of Modular Building Block (MBB) and Monolithic Microwave Integrated Circuit (MMIC), low-cost, high-integration, and miniaturized high-performance po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/16H01P1/203
CPCH01P1/20381H01P5/16
Inventor 陈志平徐海艳郑雅萍张娜王建朋
Owner NANJING UNIV OF SCI & TECH