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A Highly Selective Balun Filter

A balun filter, high selectivity technology, applied in the direction of waveguide-type devices, circuits, electrical components, etc., can solve the problems of poor selectivity, narrow balun filter bandwidth, etc., to improve selectivity, improve bandwidth, and wide bandwidth. Effect

Active Publication Date: 2019-01-18
NANJING IND INST FOR ADVANCED INTELLIGENT EQUIP
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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: the bandwidth of the balun filter is narrow and the selectivity is poor

Method used

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  • A Highly Selective Balun Filter
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  • A Highly Selective Balun Filter

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046]The three-dimensional structure of a new type of highly selective balun 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 8 used has a relative permittivity of 3.55, a thickness of 0.508 mm, and a loss tangent of 0.0035. combine Figure three , the various dimensions of the balun filter are as follows: W 1 =0.7mm,L 1 =4.15mm,W 2 = 1.4mm, L 2 = 3mm, L 3 =16.5mm, L 4 =14.2mm, W 3 = 1.4mm, W 4 =0.16mm, L 5 =5mm,L 6 =16mm,L 7 =6.9mm,L 8 =16.8mm,L 9 =13.6mm, g1=0.1mm, SL=26mm, SW=0.3mm. The overall area of ​​the microstrip power dividing filter is 36×29mm, and the corresponding guide wavelength size is 0.61λ g ×0.49λ g , where λ g is the guided wavelength corresponding to the center frequency of the passband.

[0047] The high-selectivity balun filter of this example is modeled and simulated in the electromagnetic simulation soft...

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Abstract

The invention discloses a high-selectivity balun filter. The high-selectivity balun filter comprises a metal grounding plate (7) attached to the lower surface of a rectangular dielectric substrate (8) in a covering manner, and an L type input port feeder line (1), a first L type output port feeder line (21), a second L type output port feeder line (22), an E type resonator (3), a slot line-microstrip transitional structure (4) and a terminal open-circuit microstrip uniform loading resonator (5) which are attached to the upper surface of the dielectric substrate (8) in a covering manner; and a linear slot line (6), which is symmetrical around the dielectric substrate (8), is arranged on the metal grounding plate (7). The balun filter disclosed by the invention is simple in structure, high in selectivity and relatively wide in broadband.

Description

technical field [0001] The invention belongs to the technical field of microwave passive devices, in particular to a high-selectivity balun filter with wide bandwidth and good selectivity. Background technique [0002] The balun filter is an independent microwave passive device. It realizes the equal-amplitude phase inversion and frequency selection functions of the signal, and has both properties of balun and filter. Therefore, a high-performance balun filter can effectively reduce the size of the system, thereby further realizing a low-cost, high-performance, and miniaturized design of a 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 balun filters have become the focus of scholars. research hotspots. [0003] In 2007, E.Y.Jung and H.Y.Hwang published "A Balun-BPF Using a Dual Mode RingResonator" in the IE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/212
CPCH01P1/212
Inventor 徐海艳陈全刚王建朋徐艳卉裴天齐
Owner NANJING IND INST FOR ADVANCED INTELLIGENT EQUIP