CN101950825A - Novel compact dual-mode band-pass filter - Google Patents
Novel compact dual-mode band-pass filter Download PDFInfo
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- CN101950825A CN101950825A CN2010102694108A CN201010269410A CN101950825A CN 101950825 A CN101950825 A CN 101950825A CN 2010102694108 A CN2010102694108 A CN 2010102694108A CN 201010269410 A CN201010269410 A CN 201010269410A CN 101950825 A CN101950825 A CN 101950825A
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Abstract
The invention discloses a novel compact dual-mode band-pass filter, which consists of a regular hexagonal fractal dual-mode resonator 3 of a dual spurline 4 loaded above the resonator and a pair of parallel coupling input/output port micro-strip feeder lines (1, 6) for loading open circuit branches (2, 5), wherein the dual-mode micro-strip resonator consists of a compact hexagonal closed-loop resonator subjected to one-time Kohn fractal. The dual-mode effect is realized by the dual spurline loaded above the resonator; and the input and output ports of the filter have a non-orthogonal symmetrical structure. The novel compact dual-mode band-pass filter realizes circuit miniaturization by adopting a fractal structure on the premise of not increasing design difficulty, and the non-orthogonal symmetrical input/output port coupling structure solves the problem that the traditional input/output port is difficultly interconnected in a circuit during orthogonal arrangement. The novel compact dual-mode band-pass filter with the structure has the advantages of easy processing and manufacturing in actual use, and application to microwave integrated circuits.
Description
Technical field
The present invention relates to a kind of compact bimodule band-pass filter of novelty, belong to the microwave transmission device technical field.
Background technology
The multimode common technology is a focus of Modern wireless communication research.As the important devices of wireless communication system front end, the research of bimodulus microwave filter and design more and more receive everybody concern.The outstanding advantage of dual mode filter is that a resonator can separate two merger patterns of resonator by the certain range of excitation mode, thereby realizes the miniaturization of circuit.The method for designing of traditional bimodule band-pass filter is to adopt input and output port quadrature, and introduces perturbation on resonator.The bimodule band-pass filter that this method realizes is because input and output port quadrature are unfavorable for the interconnected of side circuit; And the dual mode filter that adopts the non-orthogonal symmetrical structure of input and output port to constitute, input forms 180 ° of angles with output port, is convenient to use in microwave integrated circuit.
Summary of the invention
The objective of the invention is, realize small-sized bimodulus microwave filter in order to adopt a kind of comparatively simple method, interconnected more simple, the convenience of the circuit structure that is proposed simultaneously in actual microwave circuit.
Technical scheme of the present invention is that filter of the present invention is made up of with the parallel coupling input/output end port microstrip feed line of a pair of loading open circuit detail a fractal bimodulus micro-strip resonantor of regular hexagon that is carried in the span thorn line of resonator top; Wherein the bimodulus micro-strip resonantor is to form through the fractal compact hexagonal closed loop resonator of Kohn by one.The bimodulus effect is realized by the span thorn line structure that is carried in the resonator top; The input of filter and output port adopt non-orthogonal symmetrical structure, for loading the parallel coupling microstrip feeder line of open circuit detail.
A kind of regular hexagon dual-mode resonator, its each limit all adopt a Kohn fractal, make that under identical resonance frequency, the size of resonator reduces, and effectively reduces the volume of filter; Load the perturbation method of symmetrical spur line,, can separate two merger patterns of filter effectively, form the bimodulus bandpass characteristics in conjunction with the feeding classification of non-orthogonal symmetrical structure; Novel non-orthogonal input has realized transmission zero with the output feeding classification at the stopband of filter, has improved the stopband characteristic of filter.
The present invention's beneficial effect compared with prior art is, the regular hexagon fractal structure dual mode filter that the present invention proposes has reduced the volume of filter, and symmetric double spur line structure is adopted in perturbation, regulate the length and the width of span thorn, can adjust the frequency of two patterns; Adopt non-orthogonal input and output port simultaneously, filter is convenient to and other Microwave Circuit Interconnect.And the dual mode filter of making is easy to regulate the equal may command of centre frequency and bandwidth.The present invention adopts non-orthogonal input and output port under the prerequisite that does not increase circuit area and processed complex degree, make this filtering device to be interconnected in the circuit more easily.And compact conformation is convenient to use in microwave integrated circuit.
Description of drawings
Fig. 1 is the schematic layout pattern of the bimodule band-pass filter of compact;
Fig. 2 is the structure chart of symmetric double spur line;
Fig. 3 is nonopiate input and output port and open circuit detail;
Among the figure: 1 and 6 is input and output port, and 2 and 5 are the open circuit detail, and 3 be through once fractal hexagonal closed loop resonator, the 4th, and symmetric double spur line structure, 4 and improved hexagonal structure 3 formation dual-mode resonators; W is the perverse line width of horse; L1 is the perverse line lateral length of horse; L2 is the perverse line longitudinal length of horse.
Embodiment
The specific embodiment of the present invention as shown in Figure 1, the compact bimodule band-pass filter of embodiment of the invention novelty is made up of with the parallel coupling input/output end port microstrip feed line of a pair of loading open circuit detail a fractal dual-mode resonator of regular hexagon that loads span thorn line; Fig. 1 is an embodiment of the invention structure chart, and 3 is through once fractal regular hexagon closed loop dual-mode resonator among the figure, the 1st, and the input microstrip feed line, the 2nd, the open circuit detail that input loads, the 6th, output microstrip feed line, the 5th, the open circuit detail that output loads, the 4th, symmetric double spur line structure.Fig. 2 is the structure chart of the perverse line of present embodiment symmetry horse; Fig. 3 is the non-orthogonal input of present embodiment and output port and open circuit detail structure chart.
In concrete enforcement, the centre frequency of this example design is operated in wireless communication frequency band 1.75GHz, owing to used for reference the mentality of designing of conventional filter in the design process, so whole filter shows good bimodulus bandpass characteristics.When not introducing span thorn line structure, the resonance frequency of resonator is 1.75GHz, and be a pair of merger mould this moment; When introducing span thorn line structure, a pair of merger pattern is separated, and forms the pattern of two different frequencies, and the width W of span thorn line is 0.2mm when wherein reaching the frequency range of design, and length L 1 is 3mm, and L2 is 0.5mm, as shown in Figure 2.First pattern of dual mode filter is at 1.74GHz, and the insertion loss is-0.51dB; Second pattern is 1.77GHz, inserts loss to be-0.61dB.Simultaneously formed two transmission zeros in the stopband of filter, they lay respectively at 1.43GHz, 1.84GHz.
Claims (3)
1. the compact bimodule band-pass filter of a novelty, it is characterized in that described filter is made up of with the parallel coupling input/output end port microstrip feed line of a pair of loading open circuit detail a fractal dual-mode resonator of regular hexagon that is carried in the span thorn line of resonator top; Described bimodulus micro-strip resonantor is to form through the fractal compact hexagonal closed loop resonator of Kohn by one.
2. the compact bimodule band-pass filter of a kind of novelty according to claim 1 is characterized in that, the input of described filter and output port adopt non-orthogonal symmetrical structure.
3. the compact bimodule band-pass filter of a kind of novelty according to claim 1 is characterized in that, the described span thorn line structure that is carried in the resonator top can be realized the bimodulus effect of filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102694108A CN101950825A (en) | 2010-09-01 | 2010-09-01 | Novel compact dual-mode band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102694108A CN101950825A (en) | 2010-09-01 | 2010-09-01 | Novel compact dual-mode band-pass filter |
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| CN101950825A true CN101950825A (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102694108A Pending CN101950825A (en) | 2010-09-01 | 2010-09-01 | Novel compact dual-mode band-pass filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269588A (en) * | 2014-10-22 | 2015-01-07 | 重庆大学 | Small-scale hexagonal three-mode filter based on center branch knot loading |
| CN105489984A (en) * | 2016-01-18 | 2016-04-13 | 中国矿业大学 | Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter |
| CN108281738A (en) * | 2017-12-27 | 2018-07-13 | 厦门大学 | Bicyclic mode filter is coupled based on the cascade all-wave length of parallel coupled line head and the tail |
| GB2567962A (en) * | 2017-10-11 | 2019-05-01 | Radio Design Ltd | Resonator apparatus and method of use thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656337A (en) * | 2009-09-09 | 2010-02-24 | 华东交通大学 | Novel double-module band-pass filter |
| CN101794926A (en) * | 2010-03-26 | 2010-08-04 | 华东交通大学 | Band-pass filter based on pentagon closed loop resonator |
-
2010
- 2010-09-01 CN CN2010102694108A patent/CN101950825A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656337A (en) * | 2009-09-09 | 2010-02-24 | 华东交通大学 | Novel double-module band-pass filter |
| CN101794926A (en) * | 2010-03-26 | 2010-08-04 | 华东交通大学 | Band-pass filter based on pentagon closed loop resonator |
Non-Patent Citations (1)
| Title |
|---|
| J.S.HONG ETS: "Microstrip Bandpass Filter Using Degenerate Modes of a Novel Meander Loop Resonator", 《IEEE MICROWAVE AND GUIDED WAVE LETTERS》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269588A (en) * | 2014-10-22 | 2015-01-07 | 重庆大学 | Small-scale hexagonal three-mode filter based on center branch knot loading |
| CN104269588B (en) * | 2014-10-22 | 2017-01-18 | 重庆大学 | Small-scale hexagonal three-mode filter based on center branch knot loading |
| CN105489984A (en) * | 2016-01-18 | 2016-04-13 | 中国矿业大学 | Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter |
| GB2567962A (en) * | 2017-10-11 | 2019-05-01 | Radio Design Ltd | Resonator apparatus and method of use thereof |
| CN108281738A (en) * | 2017-12-27 | 2018-07-13 | 厦门大学 | Bicyclic mode filter is coupled based on the cascade all-wave length of parallel coupled line head and the tail |
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Application publication date: 20110119 |