CN204156068U - A kind of microstrip bimodule band-pass filter of square resonant ring - Google Patents
A kind of microstrip bimodule band-pass filter of square resonant ring Download PDFInfo
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- CN204156068U CN204156068U CN201420521520.2U CN201420521520U CN204156068U CN 204156068 U CN204156068 U CN 204156068U CN 201420521520 U CN201420521520 U CN 201420521520U CN 204156068 U CN204156068 U CN 204156068U
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Abstract
The utility model discloses a kind of square resonant ring microstrip bimodule band-pass filter, for fields such as wireless communication systems.This filter comprises incoming feeder, output feeder, perturbation sheet and a square resonant ring.Square resonant ring is positioned at loaded microstrip line on four angles of square resonant ring outside by a square microstrip line of closed loop and four and forms.Four described loaded microstrip lines are connected by outwardly directed four the little square microstrip lines of four drift angles of large square ring outside with between square resonant ring.The center on four limits of the square microstrip line of closed loop has an opening respectively, opening part is connected to four arms in Q-RING internal direction, each arm is made up of an open delta ring and two short microstrip lines, and four arms are identical, and three square ring profiles are isosceles right triangle.Loaded microstrip line on square ring microstrip line four angles adopts sagittate structure, and two ribs of arrow are mutually vertical.Perturbation sheet is positioned at one jiao of square ring resonator, and perturbation sheet is square microstrip line.Structure and the size of incoming feeder and output feeder are all identical, and are mutually 90 degree, are T-shape feeder line structure.Input and output feeder line is respectively 50 ohm characteristic live widths, connects feeder equipment.This filter has the features such as insertion loss is low, passband is narrow, stopband high degree of suppression, size are little.
Description
Technical field
The utility model relates to a kind of square resonant ring microstrip bimodule band-pass filter, and specifically a kind of have the band pass filter suppressing high order parasitic passband and small size performance, can be used for the fields such as wireless communication system.
Background technology
The filter of microstrip structure is widely applied in a wireless communication system because it is easy to design, the easily advantage such as integrated.Kind and the way of realization of microstrip filter are varied, and the research of miniaturisation high-performance microstrip filter is a popular domain always.Dual mode filter has miniaturization, low-loss and easily produces the advantages such as transmission zero, is widely used in wireless communication system.Dual-mode resonator has a pair degenerate mode, the resonator plane of symmetry is introduced perturbation this is separated degenerate mode, thus is equivalent to two tuning circuits, and the exponent number that therefore filter is intrinsic reduces half, can reduce size, make compact conformation.
The paper " Novel Second-Order Dual-Mode Dual-Band Filters Using Capacitance Loaded Square Loop Resonator " that the people such as Sen Fu in 2012 deliver at IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES periodical, (VOL. 60, NO. 3, pp.477-482, MARCH 2012) in its size of square double mode band pass filter of capacitive load of mentioning comparatively large, more weak to the degree of suppression of stopband.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of novel square resonant ring microstrip bimodule band-pass filter, and this kind of band pass filter technique is simple, and has the good performance index such as insertion loss is low, passband is narrow, stopband high degree of suppression, size are little.
The concrete technical scheme of the utility model is as follows:
The square resonant ring microstrip bimodule band-pass filter of the one that the utility model proposes, comprises incoming feeder, output feeder, perturbation sheet and a square resonant ring.The loaded microstrip line that described square resonant ring is positioned on outside four drift angles of square resonant ring by a square microstrip line of closed loop and four forms, and four described loaded microstrip lines are connected by outwardly directed four the little square microstrip lines of four drift angles of large square ring outside with between square resonant ring.
The center on four limits of the square microstrip line of described closed loop has an opening respectively, and opening part is connected to four arms in Q-RING internal direction, and each arm is made up of an open delta ring and two short microstrip lines.Described four arms are identical.Described three square ring profiles are isosceles right triangle.
Loaded microstrip line on outside four drift angles of square ring microstrip line adopts sagittate structure, and two ribs of arrow are mutually vertical, parallel with two limits of large square ring respectively.
Described perturbation sheet is positioned at one jiao of square ring resonator inside, and perturbation sheet is square microstrip line.
Structure and the size of described incoming feeder and output feeder are all identical, and are mutually 90 degree, are T-shape feeder line structure, include main feeder, parallel minor matters two parts.The sides aligned parallel of parallel minor matters and square resonant ring, feed is carried out in the inside being deep into this square resonant ring.Described input and output feeder line is respectively 50 ohm characteristic live widths, connects feeder equipment.
The utility model has following outstanding substantive distinguishing features and remarkable advantage.
1. the present invention owing to being provided with loaded microstrip line on four drift angles of Q-RING resonator outside, effectively can increase resonant-circuit capacitor, relies on the characteristic of its slow wave to efficiently reduce the size of filter.
2. internal arrangement four three square ring minor matters of Q-RING, add the guide wavelength of resonator, reduce resonance frequency, thus reduce the size of filter.
3. the T-shape feeder line structure of input and output enhances being coupled between resonator with feeder line, thus obtains lower logical in-band insertion loss.
Accompanying drawing explanation
Fig. 1 is square ring microstrip bimodule band-pass filter schematic layout pattern described in the utility model.
The square ring microstrip bimodule band-pass filter frequency response chart of Fig. 2 to be centre frequency described in the utility model be 0.62GHz.
In figure: 1-incoming feeder, 2-output feeder, 3-Q-RING, upper left corner loaded microstrip line outside 4-Q-RING, upper right corner loaded microstrip line outside 5-Q-RING, lower left corner loaded microstrip line outside 6-Q-RING, lower right corner loaded microstrip line outside 7-Q-RING, the square microstrip line in the upper left corner outside 8-Q-RING, the square microstrip line in the lower left corner outside 9-Q-RING, the square microstrip line in the lower right corner outside 10-Q-RING, the square microstrip line in the upper right corner outside 11-Q-RING, 12-perturbation sheet, the main feeder of 13-incoming feeder, the parallel minor matters of 14-incoming feeder, the main feeder of 21-output feeder, the parallel minor matters of 22-output feeder, upper three square ring minor matters in 31-Q-RING, a left side three square ring minor matters in 32-Q-RING, the right side three square ring minor matters in 33-Q-RING, lower three square ring minor matters in 34-Q-RING.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
See Fig. 1, a preferred embodiment works in the square ring microstrip bimodule band-pass filter that centre frequency is 0.62GHz.The utility model dielectric material adopts Taconic RF-60, and its dielectric constant is ε
r=6.15, thickness H=0.64 mm.As shown in Figure 1, square ring microstrip bimodule band-pass filter comprises incoming feeder 1, output feeder 2, Q-RING 3, four loaded microstrip lines 4,5,6 and 7, four square microstrip lines 8,9,10 and 11, and perturbation sheet 12.Incoming feeder 1 is T-shape feeder line structure, comprises main feeder 13 and parallel minor matters 14, and main feeder 13 is mutually vertical with parallel minor matters 14.The width W 1 of main feeder 13 is 0.93mm, and the width W 2 of parallel minor matters 14 is 14mm.The structure of output feeder 1 and incoming feeder 2 and measure-alike, and be mutually 90 degree with incoming feeder 1.The signal input of described square ring microstrip bimodule band-pass filter, output port are coaxial feed device, are positioned at the outer end of incoming feeder and output feeder.The present embodiment preferably SMA commercial connector of 50 ohm, cost-saving.
The structure of Q-RING 3 is square, and length of side L1 is 21mm, and the A/F of Q-RING four length of sides is identical, and width C 1 is 0.4mm; The structure of four three square ring minor matters 31,32,33 and 34 in Q-RING and measure-alike, width W 3 is 1mm, and the space between four three square ring minor matters is equal, and space C2 is 3mm; The structure of Q-RING four loaded microstrip lines 4,5,6 and 7 and measure-alike.Loaded microstrip line 4,5,6 is identical and mutually vertical with two rib length of 7, and length L2 is 10.3mm, and width W 4 is 1mm, and the space C3 between loaded microstrip line and Q-RING is 0.5mm.The length of side L3 of perturbation sheet 12 is 1.5mm.Four square microstrip line 8,9,10 and 11 structures and measure-alike, be square structure, side length is 1.5mm, plays the effect of connection four loaded microstrip lines 4,5,6,7 and Q-RING 3.
The square ring microstrip bimodule band-pass filter frequency response curve of Fig. 2 to be centre frequency described in the utility model be 0.62GHz, its centre frequency is 0.62GHz, 3dB bandwidth is 3.2%, and the insertion loss of filter is approximately-1.15dB, and return loss is approximately-17.43dB.Create three transmission zeros respectively at 0.56GHz, 0.67GHz and 0.99GHz in stopband range, and the decay of dead-center position is respectively-60dB ,-52dB and-40dB, has very strong inhibitory action to stopband.
The present embodiment changes the length of square ring microstrip bimodule band-pass filter Q-RING and the length of side of Q-RING inner triangular ring, can be applicable to other frequencies.
Claims (4)
1. a square resonant ring microstrip bimodule band-pass filter, comprise incoming feeder, output feeder, perturbation sheet and a square resonant ring, its feature comprises: described square resonant ring is made up of microstrip line, comprise a square microstrip line of closed loop and four loaded microstrip lines be positioned on outside four angles of square resonant ring, the center on four limits of the square microstrip line of described closed loop has an opening respectively, opening part is connected to four arms in Q-RING internal direction, each arm is made up of an open delta ring and two short microstrip lines, described four arms are identical, described three square ring profiles are isosceles right triangle.
2. the square resonant ring microstrip bimodule band-pass filter of one according to claim 1, its feature comprises: the loaded microstrip line on outside four drift angles of described square ring microstrip line adopts sagittate structure, two ribs of arrow are mutually vertical, parallel with two limits of large square ring respectively.
3. the square resonant ring microstrip bimodule band-pass filter of one according to claim 1, its feature comprises: described perturbation sheet is positioned at one jiao of square ring resonator inside, and perturbation sheet is square microstrip line.
4. the square resonant ring microstrip bimodule band-pass filter of one according to claim 1, its feature comprises: structure and the size of described incoming feeder and output feeder are all identical, and be mutually 90 degree, for T-shape feeder line structure, include main feeder, parallel minor matters two parts, the wherein sides aligned parallel of parallel minor matters and square resonant ring, feed is carried out in the inside being deep into this square resonant ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420521520.2U CN204156068U (en) | 2014-09-12 | 2014-09-12 | A kind of microstrip bimodule band-pass filter of square resonant ring |
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| CN201420521520.2U CN204156068U (en) | 2014-09-12 | 2014-09-12 | A kind of microstrip bimodule band-pass filter of square resonant ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332680A (en) * | 2014-09-12 | 2015-02-04 | 天津职业技术师范大学 | Microstrip dual-mode band pass filter of square resonance ring |
| CN112730343A (en) * | 2020-12-23 | 2021-04-30 | 江南大学 | Split-ring array multi-band high-Q-value transmission type sensor and manufacturing method thereof |
-
2014
- 2014-09-12 CN CN201420521520.2U patent/CN204156068U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332680A (en) * | 2014-09-12 | 2015-02-04 | 天津职业技术师范大学 | Microstrip dual-mode band pass filter of square resonance ring |
| CN104332680B (en) * | 2014-09-12 | 2017-03-15 | 天津职业技术师范大学 | A kind of microstrip bimodule band-pass filter of square resonant ring |
| CN112730343A (en) * | 2020-12-23 | 2021-04-30 | 江南大学 | Split-ring array multi-band high-Q-value transmission type sensor and manufacturing method thereof |
| CN112730343B (en) * | 2020-12-23 | 2022-05-10 | 江南大学 | Split-ring array multi-band high-Q-value transmission type sensor and manufacturing method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20150912 |
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| EXPY | Termination of patent right or utility model |