CN105742769A - Harmonic suppression adjustable planar dual-mode T-shaped bandpass filter - Google Patents
Harmonic suppression adjustable planar dual-mode T-shaped bandpass filter Download PDFInfo
- Publication number
- CN105742769A CN105742769A CN201610103128.XA CN201610103128A CN105742769A CN 105742769 A CN105742769 A CN 105742769A CN 201610103128 A CN201610103128 A CN 201610103128A CN 105742769 A CN105742769 A CN 105742769A
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- micro
- shaped
- uniform impedance
- strip resonantor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a harmonic suppression adjustable planar dual-mode T-shaped bandpass filter. The harmonic suppression adjustable planar dual-mode T-shaped bandpass filter comprises two dielectric plates, wherein the two dielectric plates are laminated with each other and are coated with metal on the two surfaces, the metal on the upper surface of an upper-layer dielectric plate is fabricated to form a feed structure, the metal on the lower surface of the upper-layer dielectric plate is completely removed, the metal on the upper surface of a lower-layer dielectric plate is fabricated to a T-shaped dual-mode resonator, the metal on the lower surface is completely reserved to be taken as a grounding plate, the T-shaped dual-mode resonator is a T-shaped structure formed by laminating a microstrip branch line and an uniform-impedance microstrip resonator, the tail end of the microstrip branch line is open-circuited, the two ends of the uniform-impedance microstrip resonator are open-circuited, the feed structure adopts a pair of uniform-impedance microstrip lines with open-circuited tail ends as an input microstrip line and an output microstrip line, and the distance between an open-circuit end of the feed structure and the uniform-impedance microstrip resonator is odd number times of wavelength corresponding to 1/4 harmonic frequency. By the harmonic suppression adjustable planar dual-mode T-shaped bandpass filter, the adjustment of harmonic suppression is achieved on the premise of ensuring the advantages of an original dual-mode filter, the harmonics of two different frequencies can be simultaneously suppressed, and the harmonic suppression adjustable planar dual-mode T-shaped bandpass filter can be widely applied to the design of a radio frequency microwave passive circuit.
Description
Technical field
The present invention relates to a kind of harmonics restraint adjustable plane bimodulus T-shaped band filter, belong to microwave technical field.
Background technology
Wave filter is a kind of passive device being widely used in microwave with radio frequency applications, and the quality of its index directly affects the performance of whole system.Common microwave filter many employings metal waveguide/Medium Wave Guide, coaxial line or planar microstrip line/strip line make.
In recent years, owing to communication system is strong all the more to the demand of AF panel, as one of intrasystem Key Passive Components, the harmonics restraint design requirement of wave filter is also more and more higher.Adopt the stereochemical structures such as the relative waveguide of microwave filter of planar technology or coaxial line to realize, there is simple in construction, easy to process, cheap and be prone to the advantage integrated with other active/passive circuit, receive great concern in recent years.Wherein, the key object studied especially based on the wave filter with harmonic restraining function of micro-strip resonantor.
Resonator design is become to be absent from some higher mode by the existing wave filter with harmonic restraining function mostly, thus reaching the purpose of harmonics restraint, but such design adds the difficulty of resonator design on the one hand, on the other hand, the harmonic frequency suppressed is fixed thus uncontrollable, greatly reduces motility and the scope of application of design.
Summary of the invention
The technical problem to be solved is for defect involved in background technology, a kind of harmonics restraint adjustable plane bimodulus T-shaped band filter is provided, under maintaining the premise that filter passband performance is constant, achieve the adjustable of harmonics restraint, it is possible to suppress the harmonic wave of two different frequencies simultaneously.
The present invention solves above-mentioned technical problem by the following technical solutions:
The present invention provides a kind of harmonics restraint adjustable plane bimodulus T-shaped band filter, comprises two blocks of two-sided dielectric-slabs covering metal being overlapped mutually, and wherein, the upper surface metal of top dielectric plate is made as feed structure, and lower surface metal is all removed；The upper surface metal of layer dielectric plate is made as T-shaped dual-mode resonator, and lower surface metal is all retained as earth plate；T-shaped dual-mode resonator is the T-shaped structure that the uniform impedance micro-strip resonantor superposition of the micro-band branch line by a terminal open circuit and two ends open circuit is formed；Feed structure adopts the uniform impedance microstrip line of a pair terminal open circuit as input microstrip line and output microstrip line.
As the further prioritization scheme of the present invention, the odd-multiple that distance is 1/4th harmonic frequency corresponding wavelength between open end and the uniform impedance micro-strip resonantor of input microstrip line and output microstrip line.
Further prioritization scheme as the present invention, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 6.6mm of input microstrip line, the open end distance resonator 6.6mm of output microstrip line.
Further prioritization scheme as the present invention, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 4.4mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.4mm of output microstrip line.
Further prioritization scheme as the present invention, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 6.9mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.0mm of output microstrip line.
The present invention adopts above technical scheme compared with prior art, has following technical effect that
1. simple in construction；
2. be prone to make, loss little；
3. harmonics restraint is adjustable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the transmission schematic diagram with reflection characteristic of harmonics restraint adjustable plane bimodulus T-shaped band filter.
In figure, 1-input/output microstrip line, 2-micro-band branch line, 3-uniform impedance micro-strip resonantor, 4-dielectric-slab.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in further detail:
The invention discloses a kind of harmonics restraint adjustable plane bimodulus T-shaped band filter, comprise two blocks of two-sided dielectric-slabs covering metal being overlapped mutually, wherein, the upper surface metal of top dielectric plate is made as feed structure, and lower surface metal is all removed；The upper surface metal of layer dielectric plate is made as T-shaped dual-mode resonator, and lower surface metal is all retained as earth plate；T-shaped dual-mode resonator is the T-shaped structure that the uniform impedance micro-strip resonantor superposition of the micro-band branch line by a terminal open circuit and two ends open circuit is formed；Feed structure adopts the uniform impedance microstrip line of a pair terminal open circuit as input microstrip line and output microstrip line.The open end of input microstrip line and output microstrip line is apart from the odd-multiple that uniform impedance micro-strip resonantor is wavelength corresponding to 1/4th harmonic frequencies.
The core of harmonics restraint of the present invention adjustable T-shaped dual mode filter is the odd-multiple that open end distance uniform impedance micro-strip resonantor is wavelength corresponding to 1/4th harmonic frequencies of microstrip feed line.Because at harmonic frequency place, the odd-multiple that open end distance uniform impedance micro-strip resonantor is wavelength corresponding to 1/4th harmonic frequencies of microstrip feed line, so stiffness of coupling is very weak between feeder line and resonator, it is not enough to excitation higher mode propagate in resonator, thus having reached the purpose of harmonics restraint.
Embodiment 1: as shown in Figure 1, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, and the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, in order to realize the good suppression to second harmonic, the open end distance uniform impedance micro-strip resonantor 6.6mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 6.6mm of output microstrip line.
Embodiment 2: as shown in Figure 1, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, and the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, in order to realize the good suppression to triple-frequency harmonics, the open end distance uniform impedance micro-strip resonantor 4.4mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.4mm of output microstrip line.
Embodiment 3: as shown in Figure 1, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, in order to realize the good suppression to secondary and triple-frequency harmonics, the open end distance uniform impedance micro-strip resonantor 6.9mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.0mm of output microstrip line.
Fig. 2 gives the wave filter scattering parameters curve of above three embodiment, and this new harmonic of this employing suppresses method for designing as seen from Figure 2, it is possible to improve harmonics restraint performance significantly.From Figure 2 it can be seen that by adopting the spacing between different microstrip feed line open ends and uniform impedance micro-strip resonantor, it is possible to achieve the suppression of the adjustment of harmonics restraint, secondary and triple-frequency harmonics is all at below-20dB；Coupling in passband is good simultaneously, and in-band insertion loss is minimum is only 0.9dB.Experiments show that, this design of filter can significantly improve the actual application value of wave filter, and structure is simplified, conveniently processed simultaneously.
Those skilled in the art of the present technique it is understood that unless otherwise defined, all terms used herein (include technical term and scientific terminology) and have with the those of ordinary skill in art of the present invention be commonly understood by identical meaning.Should also be understood that in such as general dictionary, those terms of definition should be understood that have the meaning consistent with the meaning in the context of prior art, and unless defined as here, will not explain by idealization or excessively formal implication.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; it is not limited to the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (5)
1. harmonics restraint adjustable plane bimodulus T-shaped band filter, comprises two blocks of two-sided dielectric-slabs covering metal being overlapped mutually, it is characterised in that in two blocks of dielectric-slabs, the upper surface metal of top dielectric plate is made as feed structure, and lower surface metal is all removed；The upper surface metal of layer dielectric plate is made as T-shaped dual-mode resonator, and lower surface metal is all retained as earth plate；
T-shaped dual-mode resonator is the T-shaped structure that the uniform impedance micro-strip resonantor superposition of the micro-band branch line by a terminal open circuit and two ends open circuit is formed；Feed structure adopts the uniform impedance microstrip line of a pair terminal open circuit as input microstrip line and output microstrip line.
2. harmonics restraint according to claim 1 adjustable plane bimodulus T-shaped band filter, it is characterized in that, the odd-multiple that distance is 1/4th harmonic frequency corresponding wavelength between open end and the uniform impedance micro-strip resonantor of input microstrip line and output microstrip line.
3. harmonics restraint according to claim 1 adjustable plane bimodulus T-shaped band filter, it is characterized in that, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 6.6mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 6.6mm of output microstrip line.
4. harmonics restraint according to claim 1 adjustable plane bimodulus T-shaped band filter, it is characterized in that, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 4.4mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.4mm of output microstrip line.
5. harmonics restraint according to claim 1 adjustable plane bimodulus T-shaped band filter, it is characterized in that, the characteristic impedance of input microstrip line and output microstrip line is 50 ohm, the length of uniform impedance micro-strip resonantor is 23.6 millimeters, wide be 1.0 millimeters, the length of micro-band branch line is 11.7mm, width is 1.0mm, the dielectric constant of dielectric-slab is 10.2, thickness is 0.635 millimeter, the open end distance uniform impedance micro-strip resonantor 6.9mm of input microstrip line, the open end distance uniform impedance micro-strip resonantor 4.0mm of output microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103128.XA CN105742769B (en) | 2016-02-25 | 2016-02-25 | The adjustable plane bimodulus T-shaped bandpass filter of harmonics restraint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103128.XA CN105742769B (en) | 2016-02-25 | 2016-02-25 | The adjustable plane bimodulus T-shaped bandpass filter of harmonics restraint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105742769A true CN105742769A (en) | 2016-07-06 |
| CN105742769B CN105742769B (en) | 2018-03-09 |
Family
ID=56248356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610103128.XA Active CN105742769B (en) | 2016-02-25 | 2016-02-25 | The adjustable plane bimodulus T-shaped bandpass filter of harmonics restraint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742769B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450604A (en) * | 2016-09-29 | 2017-02-22 | 南京邮电大学 | Planar dual-mode barron band-pass filter with adjustable transmission zero point |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN102255125A (en) * | 2010-09-21 | 2011-11-23 | 上海大学 | Novel double-frequency narrow-band bandpass filter |
| CN103474731A (en) * | 2013-09-05 | 2013-12-25 | 湖北文理学院 | Branch knot loading compact type microstrip filter |
| US20140191827A1 (en) * | 2013-01-04 | 2014-07-10 | National Tsing Hua University | Wideband high frequency bandpass filter |
-
2016
- 2016-02-25 CN CN201610103128.XA patent/CN105742769B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694898A (en) * | 2009-10-16 | 2010-04-14 | 南京邮电大学 | Bimodule annular resonant cavity band-pass filter with direct feed planar structure |
| CN102255125A (en) * | 2010-09-21 | 2011-11-23 | 上海大学 | Novel double-frequency narrow-band bandpass filter |
| US20140191827A1 (en) * | 2013-01-04 | 2014-07-10 | National Tsing Hua University | Wideband high frequency bandpass filter |
| CN103474731A (en) * | 2013-09-05 | 2013-12-25 | 湖北文理学院 | Branch knot loading compact type microstrip filter |
Non-Patent Citations (1)
| Title |
|---|
| 黄晓东: "一种小型化超宽带微带带通滤波器", 《中国科技论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450604A (en) * | 2016-09-29 | 2017-02-22 | 南京邮电大学 | Planar dual-mode barron band-pass filter with adjustable transmission zero point |
| CN106450604B (en) * | 2016-09-29 | 2019-04-09 | 南京邮电大学 | A kind of adjustable plane bimodulus balun bandpass filter of transmission zero |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105742769B (en) | 2018-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9472835B2 (en) | Filtering apparatus | |
| KR101430994B1 (en) | Compact and Light Duplexers with the SIW-based layered waveguide structure for satellite communications terminals | |
| CN105742766A (en) | Combined filter employing ceramic resonator grooving and coupling mode | |
| US9660316B2 (en) | Millimeter wave dual-mode diplexer and method | |
| US7592885B2 (en) | Stacked dielectric band-pass filter having a wider passband | |
| CN103682535B (en) | Coaxial cavity dual-band filter based on Stepped Impedance structure | |
| CN109301405B (en) | Three-dimensional absorption type frequency selection structure with suction | |
| US10297920B2 (en) | Compact dual circular polarization multi-band waveguide feed network | |
| EP2744037A1 (en) | Filter, receiver, transmitter and transceiver | |
| CN106299575A (en) | A kind of Compact type broadband merit filter-divider | |
| US20100207702A1 (en) | OMT Type Broadband Multiband Transmission-Reception Coupler-Separator for RF Frequency Telecommunications Antennas | |
| KR20150112179A (en) | Waveguide Band Pass Filter using Short-circuit Stub for Out-of-Band Improvement | |
| JP2023527913A (en) | A Fourth-Order Ka Bandpass Filter Based on Printed Ridge Gap Waveguides | |
| CN110350273B (en) | Dual-passband millimeter wave substrate integrated waveguide filter | |
| CN103779640B (en) | Micro-band double-passband filter | |
| US9042847B2 (en) | Filter, receiver, transmitter and transceiver | |
| US8478223B2 (en) | Methods and apparatus for receiving radio frequency signals | |
| CN105098301A (en) | SIW-based dual-band-pass filter for loading H type gap structure | |
| EP3386028B1 (en) | Combiner | |
| CN105742769A (en) | Harmonic suppression adjustable planar dual-mode T-shaped bandpass filter | |
| CN101764276A (en) | Quarter-wave resonant cavity band-pass filter of micro-strip coplanar waveguide composite structure | |
| US11050130B1 (en) | Dielectric waveguide | |
| CN205621822U (en) | High isolation low pass band -pass triplexer | |
| KR100852487B1 (en) | Dielectric duplexer | |
| US20110248793A1 (en) | Band-pass filter based on crlh resonator and duplexer using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200702 Address after: 2/F, Unit B, 300 Zhihui Road, Kirin Science and Technology Innovation Park, Nanjing, Jiangsu Province, 211000 Patentee after: Nanjing Youqing Electronic Technology Co., Ltd Address before: 210003 Gulou District, Jiangsu, Nanjing new model road, No. 66 Patentee before: NANJING University OF POSTS AND TELECOMMUNICATIONS |