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Slot-line-form-based high-selectivity balun filter

A balun filter, high-selectivity technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of high production cost, complex structure design, etc., and achieve the effect of improving bandwidth, bandwidth and selectivity.

Active Publication Date: 2017-07-21
ZHONGTIAN BROADBAND TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this design method can achieve a compact structure, the structural design is very complicated and the production cost is high.

Method used

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  • Slot-line-form-based high-selectivity balun filter
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  • Slot-line-form-based high-selectivity balun filter

Examples

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Embodiment 1

[0067] The three-dimensional structure of a highly selective balun filter based on slot lines is as follows: figure 1 As shown, the top view is as Figures 2 to 4 As shown, the relevant dimensions and specifications are as follows Figure 5 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. to combine Figure 5 , the various dimensions of the balun filter are as follows: g1=0.1mm, Ls=26mm, Ws=0.3mm, L1=16.8mm, W1=0.16mm, L2=6.9mm, W2=1.4mm, L3=16mm, W3 =0.7mm, L4=14.2mm, W4=1.4mm, L5=16mm, L6=5mm, L7=2.3mm, the diameter of the short-circuit column is 0.6mm. The overall area of ​​the balun filter is 38×38mm, and the corresponding guide wavelength size is 0.567λg×0.567λg, where λg is the guide wavelength corresponding to the center frequency of the passband.

[0068] The balun filter of this example is modeled and simulated in the electromagnetic simulation software HFSS.13. Figure 6 It is the...

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Abstract

The invention provides a slot-line-form-based high-selectivity balun filter comprising a metal ground plate pasted to a lower surface of a rectangular dielectric substrate, an input port feeder line, a first output port feeder line, a second output port feeder line, a first slot line-microstrip transition structure, a second slot line-microstrip transition structure, a first E-type resonator, a second E-type resonator, a first terminal open-circuit microstrip uniform loaded resonator, and a second terminal open-circuit microstrip uniform loaded resonator. The input port feeder line, the first output port feeder line, the second output port feeder line, the first slot line-microstrip transition structure, the second slot line-microstrip transition structure, the first E-type resonator, the second E-type resonator, the first terminal open-circuit microstrip uniform loaded resonator, and the second terminal open-circuit microstrip uniform loaded resonator are pasted to the upper surface of the dielectric substrate. The balun filter based on slot line-microstrip transition structures and a dual-mode resonator with central branch loading has advantages of simple principle, high frequency selectivity, high rectangle coefficient, and wide working frequency band and is suitable for a modern wireless communication system.

Description

[0001] [technical field] [0002] The invention relates to the technical field of microwave passive devices, in particular to a highly selective balun filter based on slot lines, the balun filter has the advantages of simple principle, novel structure, good in-band signal balance characteristics and out-of-band selectivity Advanced advantages. [0003] [Background technique] [0004] In recent years, with the rapid development of Modular Building Block (MBB) and Monolithic Microwave Integrated Circuit (MMIC), low cost, high integration, and miniaturization have become the integrated design of modern wireless communication systems. very important considerations. In order to achieve these design goals, new passive microwave devices with multifunctional integration features are becoming a research hotspot at home and abroad, and one of the very hot topics is the design of high-performance balun filters. [0005] The balun filter is an independent microwave passive device, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/212
CPCH01P1/212
Inventor 葛磊
Owner ZHONGTIAN BROADBAND TECH
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