CN107946707B - Balance bandpass filter and its design method based on right angled triangle paster structure - Google Patents
Balance bandpass filter and its design method based on right angled triangle paster structure Download PDFInfo
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- CN107946707B CN107946707B CN201711032947.0A CN201711032947A CN107946707B CN 107946707 B CN107946707 B CN 107946707B CN 201711032947 A CN201711032947 A CN 201711032947A CN 107946707 B CN107946707 B CN 107946707B
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- 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
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
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Abstract
The present invention provides a kind of balance bandpass filter and its design method based on right angled triangle paster structure, including micro-strip patch unit, substrate and the metal ground layer successively arranged under；Micro-strip patch unit includes right angle trigonometry microband paste unit and half-wave resonator；Right angle trigonometry microband paste unit includes intercouple cascade right angle trigonometry patch A1, A2, it further include microstrip feed line B1, B2, B3, the B4 being embedded on the right-angle side of each right angle trigonometry patch, it is correspondingly connected on four articles of microstrip feed lines to have the first quarter-wave open stub C1, the second quarter-wave open stub C2, third quarter-wave open stub C3, the 4th quarter-wave open stub C4；First right angle trigonometry patch A1 and the second right angle trigonometry patch A2 cascade, loads a half-wave resonator between the first right angle trigonometry patch A1 and the second right angle trigonometry patch A2.
Description
Technical field
The present invention relates to wireless communication fields, more particularly, to a kind of balance based on right angled triangle paster structure
Bandpass filter and its design method.
Background technique
As the requirement that wireless communication technique is fast-developing and people are to communication quality is gradually increased, more and more
Scholar and researcher have focused on sight in the research of wireless telecom equipment.Microwave filter is as a kind of frequency selectivity
Passive device, each noise like and garbage signal can be inhibited, retain effective signal, play in a wireless communication system important
Role, the superiority and inferiority of performance will directly affect the quality of communication system quality.However, under the larger environment of noise, commonly
Filter is easy to be interfered, and is difficult to meet basic communication system requirements.It is more next in order to preferably realize the inhibition to noise
More persons select balancing circuitry, because it has relatively good immunity to noise.And it is used for traditional single-end circuit to balance electricity
On the road, it needing to add balun device, this will increase the size of circuit, so, differential balance filter can be very good to complete circuit
Integration and miniaturization.
Currently, balance bandpass filter can be realized in several ways, for example half-wave resonator, Stepped Impedance are humorous
Vibration device (SIR), two-sided parallel strips structure (DSPSL), branch line etc..But they are all based on the linear structure of micro-strip, when
When working frequency improves, circuit size will become very little, and to requirement on machining accuracy height, cost is high, and its performance is not so good as
Low frequency is good.And traditional metal waveguide device is since its volume is big, processing technology and debugging process are complicated, so as to cause application
System cost is expensive, difficult in maintenance.
With structure, simple, easy processing forms, is at low cost, having stronger mechanical structure performance and preferable height paster structure
The features such as frequency characteristic, is widely used in designing the devices such as antenna, filter and the coupler in wireless communication system.Except this it
Outside, because the exclusive large scale characteristic of patch unit can overcome well millimetric wave device circuit size too small, to machining accuracy,
The defects of more demanding in terms of cost.
Summary of the invention
The present invention provides that a kind of circuit structure is simple, the good balance based on right angled triangle paster structure of frequency selectivity
Bandpass filter.
Another object of the present invention is to provide a kind of balance bandpass filter based on right angled triangle paster structure
Design method.
In order to reach above-mentioned technical effect, technical scheme is as follows:
A kind of balance bandpass filter based on right angled triangle paster structure, including the micro strip successively arranged under
Shape unit, substrate and metal ground layer；The micro-strip patch unit includes right angle trigonometry microband paste unit and half-wave resonator；
The right angle trigonometry microband paste unit includes intercouple cascade first right angle trigonometry patch A1 and the second right angle trigonometry patch
Piece A2 further includes the first microstrip feed line B1 being embedded on the right-angle side of each right angle trigonometry patch, the second microstrip feed line B2,
Three microstrip feed line B3, the 4th microstrip feed line B4, it is correspondingly connected on four microstrip feed lines to have the first quarter-wave open circuit
Stub C1, the second quarter-wave open stub C2, third quarter-wave open stub C3, the four or four/
One wavelength open stub C4；The first right angle trigonometry patch A1 and the second right angle trigonometry patch A2 cascade, at the first right angle
A half-wave resonator is loaded between three butt chock A1 and the second right angle trigonometry patch A2.
Preferably, the micro-strip patch unit uses micro belt process fixed substrate, and the substrate is made of dielectric material.
Preferably, the substrate with a thickness of 0.813mm.
Preferably, the dielectric constant of the dielectric material of the substrate is 3.38.
Preferably, the substrate is made of the dielectric material of Rogers 4003C.
Preferably, the metal ground layer is to be paved with the metal ground layer of good conductor.
A kind of design method of the balance bandpass filter based on right angled triangle paster structure, comprising the following steps:
S1: according to centre frequency, the dielectric constant of substrate, calculate right angle trigonometry patch initial bevel edge is long and wavelength
The initial length of resonator and quarter-wavelength stub；
S2: determine position of the microstrip feed line on right angle trigonometry patch to meet the impedance matching between input/output end port；
S3: it realizes required coupling factor, and then obtains in the gap between fine tuning right angle trigonometry patch and half-wave resonator
To optimal impedance matching.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The invention proposes a kind of balance bandpass filters based on right angled triangle paster structure, with good difference
Mode selectivity and common mode inhibition are very suitable for the application of the wireless communication systems such as satellite communication；Pass through adjusting triangle patch
The size of resonator and half-wave resonator, thus it is possible to vary working frequency；B, structure is simple, superior performance, is easy to and other electricity
Road is integrated；C, using microband paste structure, there is stronger mechanical structure performance, low section, low cost are easy to process.
Detailed description of the invention
Fig. 1 is side structure schematic diagram of the embodiment of the present invention；
Fig. 2 is first layer of embodiment of the present invention upper layer micro-strip overall structure diagram；
Fig. 3 is the frequency response results comparison diagram of emulation and the test of the embodiment of the present invention.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figs. 1-2, a kind of balance bandpass filter based on right angled triangle paster structure, including under successively
Micro-strip patch unit 101, substrate 102 and the metal ground layer 103 of arrangement；The micro-strip patch unit 101 includes that right angle trigonometry is micro-
Band chip unit 201 and half-wave resonator 202；The right angle trigonometry microband paste unit 201 is cascade including intercoupling
First right angle trigonometry patch A1 and the second right angle trigonometry patch A2, further includes being embedded on the right-angle side of each right angle trigonometry patch
The first microstrip feed line B1, the second microstrip feed line B2, third microstrip feed line B3, the 4th microstrip feed line B4, in four microstrip feed lines
It is above correspondingly connected to have the first quarter-wave open stub C1, the second quarter-wave open stub C2, third
Quarter-wave open stub C3, the 4th quarter-wave open stub C4；The first right angle trigonometry patch A1
It is cascaded with the second right angle trigonometry patch A2, one is loaded between the first right angle trigonometry patch A1 and the second right angle trigonometry patch A2
Half-wave resonator 202.
Wherein, the shapes and sizes of four microstrip lines (B1, B2, B3, B4) are consistent, are wide w0, end is apart from triangle
The right-angled apices distance of patch is s, insert depth ls, insertion width is ws, four quarter-wave open stubs (C1,
C2, C3, C4) shapes and sizes it is consistent, be a length of l1, width w1Rectangle, and the distance of three butt chock right-angle side of distance
For h.
The intermediate of the right angle trigonometry patch (A1, A2) of two coupled cascades loads a half-wave resonator 202, passes through seam
Gap coupled modes are cascaded；The a length of a of bevel edge of three butt chocks (A1, A2), the length of half-wave resonator 202 are l2, width
For w2, the coupling gap between two or three butt chock is g.
Micro-strip patch unit 101 uses micro belt process fixed substrate 102, and the substrate 102 is made of dielectric material；Base
Plate 102 with a thickness of 0.813mm；The dielectric constant of the dielectric material of substrate 102 is 3.38；Substrate 102 is by Rogers 4003C
Dielectric material constitute；Metal ground layer 103 is to be paved with the metal ground layer of good conductor.
Above-mentioned each circuit parameter are as follows: w0=2mm, w1=0.4mm, l1=5.2mm, w2=0.3mm, l2=9.1mm, ws=
0.1mm, ls=1.3mm, g=0.6mm, a=7.6mm, h=3.1mm, s=3.3mm.
A kind of design method of the balance bandpass filter based on right angled triangle paster structure, comprising the following steps:
S1: according to centre frequency, the dielectric constant of substrate, calculate right angle trigonometry patch initial bevel edge is long and wavelength
The initial length of resonator and quarter-wavelength stub；
S2: determine position of the microstrip feed line on right angle trigonometry patch to meet the impedance matching between input/output end port；
S3: it realizes required coupling factor, and then obtains in the gap between fine tuning right angle trigonometry patch and half-wave resonator
To optimal impedance matching.
(the frequency response results comparison diagram of emulation and the measurement of the embodiment of the present invention) as shown in Figure 3, the embodiment of the present invention
Realize the balance bandpass filter based on right angled triangle paster structure, in measured result, centre frequency 10GHz, in difference
Insertion Loss under mould response is 2.35dB, and 3dB relative bandwidth is 6%, and Out-of-band rejection reaches 20dB or less within 20GHz.?
Under common-mode response, common mode inhibition reach 15dB within 20GHz hereinafter, and reach 26dB in passband hereinafter,
Above-mentioned all results are Rogers 4003C in baseplate material, and dielectric constant 3.38, substrate thickness is
It is measured under the true environment of 0.813mm by vector network analyzer.By being emulated above with test comparison chart it can be found that imitative
True and measured curve coincide substantially, and it is practical to show the solution of the present invention.
The same or similar label correspond to the same or similar components；
Described in attached drawing positional relationship for only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (7)
1. a kind of balance bandpass filter based on right angled triangle paster structure, which is characterized in that including successively being arranged under
Micro-strip patch unit (101), substrate (102) and the metal ground layer (103) of cloth；The micro-strip patch unit (101) includes right angle
Triangle microband paste unit (201) and half-wave resonator (202)；The right angle trigonometry microband paste unit (201) includes phase
The cascade first right angle trigonometry patch A1 of mutual coupling and the second right angle trigonometry patch A2 further includes being embedded in each right angle trigonometry patch
The first microstrip feed line B1, the second microstrip feed line B2, third microstrip feed line B3, the 4th microstrip feed line B4 on the right-angle side of piece,
It is correspondingly connected on four microstrip feed lines to have the first quarter-wave open stub C1, the second quarter-wave open circuit short
Transversal C2, third quarter-wave open stub C3, the 4th quarter-wave open stub C4；First right angle
Three butt chock A1 and the second right angle trigonometry patch A2 cascade is pasted in the bevel edge of the first right angle trigonometry patch A1 and the second right angle trigonometry
A half-wave resonator (202) is loaded between the bevel edge of A2.
2. the balance bandpass filter according to claim 1 based on right angled triangle paster structure, which is characterized in that institute
Micro-strip patch unit (101) are stated using micro belt process fixed substrate (102), the substrate (102) is made of dielectric material.
3. the balance bandpass filter according to claim 2 based on right angled triangle paster structure, which is characterized in that institute
State substrate (102) with a thickness of 0.813mm.
4. the balance bandpass filter according to claim 2 based on right angled triangle paster structure, which is characterized in that institute
Substrate (102) is stated to be made of the dielectric material of Rogers 4003C.
5. the balance bandpass filter according to claim 2 based on right angled triangle paster structure, which is characterized in that institute
The dielectric constant of the dielectric material for stating substrate (102) is 3.38.
6. the balance bandpass filter according to claim 1-5 based on right angled triangle paster structure, special
Sign is that the metal ground layer (103) is the metal ground layer for being paved with good conductor.
7. a kind of design method of the balance bandpass filter based on right angled triangle paster structure as claimed in claim 6,
Characterized by comprising the following steps:
S1: according to centre frequency, the dielectric constant of substrate, calculate right angle trigonometry patch initial bevel edge is long and wave resonance
The initial length of device and quarter-wavelength stub；
S2: determine position of the microstrip feed line on right angle trigonometry patch to meet the impedance matching between input/output end port；
S3: required coupling factor is realized, and then obtain most in the gap between fine tuning right angle trigonometry patch and half-wave resonator
Excellent impedance matching.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711032947.0A CN107946707B (en) | 2017-10-26 | 2017-10-26 | Balance bandpass filter and its design method based on right angled triangle paster structure |
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|---|---|---|---|
| CN201711032947.0A CN107946707B (en) | 2017-10-26 | 2017-10-26 | Balance bandpass filter and its design method based on right angled triangle paster structure |
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| CN107946707A CN107946707A (en) | 2018-04-20 |
| CN107946707B true CN107946707B (en) | 2019-09-20 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111613857B (en) * | 2020-05-25 | 2022-02-01 | 南京师范大学 | Double-passband filtering coupler adopting double-layer slotted circular patch |
| WO2022049525A1 (en) * | 2020-09-02 | 2022-03-10 | Khalifa University of Science and Technology | Balanced bandpass filters for millimeter-wave applications |
| CN113381144B (en) * | 2021-06-07 | 2022-03-11 | 南京智能高端装备产业研究院有限公司 | High-performance balanced band-pass filter based on equilateral triangle patch |
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|---|---|---|---|---|
| CN202142626U (en) * | 2011-06-17 | 2012-02-08 | 河海大学常州校区 | Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure |
| CN205488450U (en) * | 2015-12-15 | 2016-08-17 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Rectifier circuit with bandpass characteristics |
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| CN202142626U (en) * | 2011-06-17 | 2012-02-08 | 河海大学常州校区 | Isosceles right angled triangle micro-strip band pass filter based on fractal defect structure |
| CN205488450U (en) * | 2015-12-15 | 2016-08-17 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Rectifier circuit with bandpass characteristics |
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| "new planar dual-mode filter using cross-slotted patch resonator for simultaneous size and loss reduction";Lei Zhu et al;《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》;19990530;第47卷(第5期);第650-654页 * |
| "wideband circularly polarized dielectric resonator antenna with bandpass filtering and wide harmonics suppression response";B.J.Xiang et al;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20170430;第64卷(第4期);第2096-2101页 * |
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