CN109193085A - A kind of LTCC high-performance micro balun filter - Google Patents
A kind of LTCC high-performance micro balun filter Download PDFInfo
- Publication number
- CN109193085A CN109193085A CN201811004754.9A CN201811004754A CN109193085A CN 109193085 A CN109193085 A CN 109193085A CN 201811004754 A CN201811004754 A CN 201811004754A CN 109193085 A CN109193085 A CN 109193085A
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- strip line
- quarter
- resonance device
- wave resonance
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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
- H01P1/2039—Galvanic coupling between Input/Output
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Abstract
The present invention discloses a kind of LTCC high-performance micro balun filter, includes altogether level Four resonant element as resonant element using three layers of short-circuit strip lines configuration, and joined strip line connecting plate between adjacent resonant element, enhances the coupling between resonant element.The filter realizes three-dimensional integration using LTCC technology, have many advantages, such as that structure is simple, small in size, debugging is flexible and convenient, insertion loss is small, stopband attenuation is big, amplitude imbalance degree is small, production is at low cost, can be mass-produced, the fields such as the military of corresponding band, commercial communication can be widely used in.
Description
Technical field
The invention belongs to passive balun wave filter technology fields, and in particular to a kind of LTCC high-performance micro balun filtering
Device.
Background technique
Balun include a unbalanced voltage condition port and two Differential Output ports, be three port elements, be mainly used for by
Single ended signal is converted to a pair of of differential signal, and balun is also referred to as balun, and balun filter is generally also
Referred to as balance filter.Balun filter has the function of balun and filter simultaneously, can either filter and can carry out flat
It weighs non-equilibrium conversion.Therefore, balun filter has been widely used in the fields such as bluetooth, local area network at present.
Compared to traditional handicraft processing technology, LTCC(low-temperature co-fired ceramics) technology can realize the three of product easily
Dimension is three-dimensional integrated, and LTCC technology allows the minimum process thickness of transmission line to be 0.01mm, allows the minimum technique width of transmission line
For 0.1mm, what this made microwave passive component is miniaturizated to possibility.LTCC technology is a kind of to be very suitable for microwave regime
Technique integrated technology can produce high-performance micro balun filter.
2015, Cai Chuantao, Wu Wenlin, it is apt to bright etc., has delivered a kind of " Wideband in national microwave and millimeter wave meeting
The design of multimode balun bandpass filter ", frequency range 2.3-3.7GHz, insertion loss 5dB, Out-of-band rejection 30dB, 3.7*
5.5mm, this achievable frequency band of design scheme is wider, but volume is big, and Out-of-band rejection is poor.
2016, Institutes Of Technology Of Nanjing Li Bowen, " research of the miniature balun filter based on LTCC technology " has been delivered,
Frequency range 2.84-3.01GHz, insertion loss 6.95dB, Out-of-band rejection 30dB, 3.2*4.5*1.9mm, this design scheme can
Realize it is compact-sized, it is small in size, but Out-of-band rejection is still not good enough.
In short, problem of the existing technology is: the Out-of-band rejection of balun filter is poor.
Summary of the invention
The purpose of the present invention is to provide a kind of LTCC high-performance micro balun filters, solve the band of balun filter
It is outer to inhibit poor problem.
Realize the technical solution of the object of the invention are as follows: a kind of LTCC high-performance micro balun filter, including input port,
Input connecting lead wire, the first output port, the first output connecting lead wire, second output terminal mouth, the second output connecting lead wire, first
Section strip line connecting plate, second segment strip line connecting plate, third section strip line connecting plate, the first quarter-wave resonance device,
Second quarter-wave resonance device, third quarter-wave resonance device, the 4th quarter-wave resonance device, Z-shaped intersection
Coupling unit first segment strip line, Z-shaped cross-coupling unit second segment strip line and Z-shaped cross-coupling unit third section are band-like
Line.
The quarter-wave resonance device is made of three layers of short-circuit strip line, respectively top layer's short circuit strip line, in
Interbed short circuit strip line and lowest level short circuit strip line.
Input port connection input connecting lead wire one end, input connecting lead wire the other end connect first four/
One wave resonator middle layer short circuit strip line one end, first quarter-wave resonance device lowest level short circuit strip line it is another
One end connects first segment strip line one end of the connection board, and the other end of first segment strip line connecting plate connects second quarter-wave
Long resonator lowest level short circuit strip line one end, the other end of second quarter-wave resonance device lowest level short circuit strip line
Second segment strip line one end of the connection board is connected, the other end connection third quarter-wave of second segment strip line connecting plate is humorous
The other end of one end of vibration device lowest level short circuit strip line, third quarter-wave resonance device lowest level short circuit strip line connects
Third section strip line one end of the connection board is connect, the other end of third section strip line connecting plate connects the 4th quarter-wave resonance
Device lowest level short circuit strip line one end, the other end of the middle layer short circuit strip line of the 4th quarter-wave resonance device pass through
First output connecting lead wire is connect with the first output port, top layer's short circuit strip line of the 4th quarter-wave resonance device
The other end be connected by the second output connecting lead wire with second output terminal mouth, the first resonant element top is in parallel equipped with Z-shaped friendship
Coupling unit first segment strip line is pitched, four resonant element upper verticals are equipped with Z-shaped cross-coupling unit second segment strip line, the
Z-shaped cross-coupling unit third section strip line is equipped with above four resonant elements in parallel.
Compared with prior art, the present invention its remarkable advantage are as follows:
(1) minimize: using LTCC(low-temperature co-fired ceramics) three-dimensional integration technology, structure is simple, small in size, miniature balun filter
The size of wave device is 4.5mm × 3.2mm × 1.5mm.
(2) high-performance: joined Z-shaped cross-coupling above the first resonant element and the 4th resonant element, introduce transmission
Zero point effectively enhances Out-of-band rejection；Out-of-band rejection can be increased to 38dB by the present invention.
Detailed description of the invention
Fig. 1 is a kind of top view of LTCC high-performance micro balun filter of the present invention.
Fig. 2 is a kind of main view of LTCC high-performance micro balun filter of the present invention.
Fig. 3 is a kind of main performance curve graph of LTCC high-performance micro balun filter of the present invention.
Fig. 4 is that a kind of amplitude imbalance of LTCC high-performance micro balun filter of the present invention is write music line chart.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
In conjunction with Fig. 1, a kind of LTCC high-performance micro balun filter, including input port 1, input connecting lead wire 1-1, the
It is band-like that one output port 2, first exports connecting lead wire 2-1, the output of second output terminal mouth 3, second connecting lead wire 3-1, first segment
Line connecting plate 4-1, second segment strip line connecting plate 4-2, third section strip line connecting plate 4-3, the first quarter-wave resonance
Device 5-1, the second quarter-wave resonance device 5-2, third quarter-wave resonance device 5-3, the 4th quarter-wave are humorous
Shake device 5-4 and cross-coupling unit 6, and the cross-coupling unit 6 includes Z-shaped cross-coupling unit first segment strip line 6-1, Z
Shape cross-coupling unit second segment strip line 6-2 and Z-shaped cross-coupling unit third section strip line 6-3, Z-shaped cross-coupling unit
The both ends second segment strip line 6-2 are separately connected Z-shaped cross-coupling unit first segment strip line 6-1 and Z-shaped cross-coupling unit
Three sections of strip line 6-3 form zigzag configuration.
The described connection of input port 1 input one end connecting lead wire 1-1, the other end connection first of input connecting lead wire 1-1
A one end quarter-wave resonance device 5-1 middle layer short circuit strip line 5-12, first quarter-wave resonance device 5-1 is most
The other end of lower layer short circuit strip line 5-12 connects the one end first segment strip line connecting plate 4-1, first segment strip line connecting plate 4-1
The other end connect second one end quarter-wave resonance device 5-2 lowest level short circuit strip line 5-23, second four/
Other end connection one end second segment strip line connecting plate 4-2 of one wave resonator 5-2 lowest level short circuit strip line 5-23, second
The other end of section strip line connecting plate 4-2 connects third quarter-wave resonance device 5-3 lowest level short circuit strip line 5-33
One end, third quarter-wave resonance device 5-33 lowest level short circuit strip line 5-33 the other end connection third section it is band-like
The other end of the one end line connecting plate 4-3, third section strip line connecting plate 4-3 connects the 4th quarter-wave resonance device 5-4
The one end lowest level short circuit strip line 5-43, the middle layer short circuit strip line 5-42's of the 4th quarter-wave resonance device 5-4
The other end is connect by the first output connecting lead wire 2-1 with the first output port 2, the 4th quarter-wave resonance device 5-4
Top layer short circuit strip line 5-41 the other end by second output connecting lead wire 3-1 be connected with second output terminal mouth 3, first
Z-shaped cross-coupling unit first segment strip line 6-1 is equipped with above resonant element 5-1 in parallel, four resonant element upper verticals are set
There is a Z-shaped cross-coupling unit second segment strip line 6-2, is equipped with Z-shaped cross-coupling unit the above the 4th resonant element 5-4 in parallel
Three sections of strip line 6-3.
Fig. 2 further shows a kind of front view of LTCC high-performance micro balun filter of the present invention.As shown in Fig. 2,
The present invention, as resonant element, is included altogether level Four resonant element, specifically included: first four using three layers of short-circuit strip lines configuration
/ mono- wave resonator 5-1, top layer short circuit strip line 5-11, top layer short circuit strip line 5-12, top layer's short circuit band
Shape line 5-13；Second quarter-wave resonance device 5-2, top layer short circuit strip line 5-21, top layer's short circuit strip line
5-22, top layer short circuit strip line 5-23；Third quarter-wave resonance device 5-3, top layer short circuit strip line 5-31,
Top layer short circuit strip line 5-32, top layer short circuit strip line 5-33；4th quarter-wave resonance device 5-4, it is most upper
The short-circuit strip line 5-41, top layer short circuit strip line 5-42, top layer short circuit strip line 5-43 of layer.
The present invention is based on LTCC three-dimensional integration technology, resonator uses the band-like line form of three layers of short circuit, is added between resonator
Strip line connecting plate, cross-coupling unit is added in resonator top, to introduce transmission zero.
The first quarter-wave resonance device 5-1, the second quarter-wave resonance device 5-2, third a quarter
Wave resonator 5-3, the 4th quarter-wave resonance device 5-4 are arranged in parallel.
The Z-shaped cross-coupling unit first segment strip line 6-1 and Z-shaped cross-coupling unit third section strip line 6-3 points
Do not extend to opposite direction, place Z-shaped cross-coupling unit, can with outer introducing transmission zero, improve filter with outer suppression
System, boostfiltering device performance.
Fig. 3 illustrates a kind of LTCC high-performance micro balun filter of the present invention, is less than 4.2dB, Out-of-band rejection with interior Insertion Loss
Greater than 38dB, performance is better than the prior art.
Fig. 4 illustrates that a kind of LTCC high-performance micro balun filter of the present invention, amplitude coincidence are better than 0.5dB, and performance is excellent
It is different.
Claims (3)
1. a kind of LTCC high-performance micro balun filter, it is characterised in that: including input port (1), input connecting lead wire (1-
1), the first output port (2), the first output connecting lead wire (2-1), second output terminal mouth (3), the second output connecting lead wire (3-
1), first segment strip line connecting plate (4-1), second segment strip line connecting plate (4-2), third section strip line connecting plate (4-3),
One quarter-wave resonance device (5-1), the second quarter-wave resonance device (5-2), third quarter-wave resonance device
(5-3), the 4th quarter-wave resonance device (5-4) and cross-coupling unit (6), the cross-coupling unit (6) includes Z-shaped
Cross-coupling unit first segment strip line (6-1), Z-shaped cross-coupling unit second segment strip line (6-2) and Z-shaped cross-coupling list
First third section strip line (6-3), Z-shaped cross-coupling unit second segment strip line (6-2) both ends are separately connected Z-shaped cross-coupling list
First first segment strip line (6-1) and Z-shaped cross-coupling unit third section strip line (6-3) form zigzag configuration；
The quarter-wave resonance device is made of three layers of short-circuit strip line, respectively top layer's short circuit strip line, middle layer
Short-circuit strip line and lowest level short circuit strip line；
The input port (1) connection input one end connecting lead wire (1-1), the other end connection of input connecting lead wire (1-1) the
One quarter-wave resonance device (5-1) middle layer short circuit strip line (5-12) one end, first quarter-wave resonance
The other end of device (5-1) lowest level short circuit strip line (5-12) connects the one end first segment strip line connecting plate (4-1), first segment band
The other end of shape line connecting plate (4-1) connects second quarter-wave resonance device (5-2) lowest level short circuit strip line (5-
23) other end of one end, second quarter-wave resonance device (5-2) lowest level short circuit strip line (5-23) connects second segment
The other end connection third quarter-wave of the one end strip line connecting plate (4-2), second segment strip line connecting plate (4-2) is humorous
One end of vibration device (5-3) lowest level short circuit strip line (5-33), third quarter-wave resonance device (5-33) lowest level are short
The other end of road strip line (5-33) connects the one end third section strip line connecting plate (4-3), third section strip line connecting plate (4-3)
The other end connect the 4th quarter-wave resonance device (5-4) lowest level short circuit strip line (5-43) one end, the 4th four
The other end of the middle layer short circuit strip line (5-42) of/mono- wave resonator (5-4) passes through the first output connecting lead wire (2-
1) it is connect with the first output port (2), top layer's short circuit strip line (5-41) of the 4th quarter-wave resonance device (5-4)
The other end by second output connecting lead wire (3-1) be connected with second output terminal mouth (3), the first resonant element (5-1) top
It is equipped with Z-shaped cross-coupling unit first segment strip line (6-1) in parallel, four resonant element upper verticals are equipped with Z-shaped cross-coupling
Unit second segment strip line (6-2), it is band-like that the 4th resonant element (5-4) top is equipped with Z-shaped cross-coupling unit third section in parallel
Line (6-3).
2. LTCC high-performance micro balun filter according to claim 1, it is characterised in that: the input port (1),
Input connecting lead wire (1-1), the first output port (2), the first output connecting lead wire (2-1), second output terminal mouth (3), second
Output connecting lead wire (3-1), first segment strip line connecting plate (4-1), second segment strip line connecting plate (4-2), third section are band-like
Line connecting plate (4-3), the first quarter-wave resonance device (5-1), the second quarter-wave resonance device (5-2), the three or four
/ mono- wave resonator (5-3), the 4th quarter-wave resonance device (5-4), Z-shaped cross-coupling unit first segment strip line
(6-1), Z-shaped cross-coupling unit second segment strip line (6-2) and Z-shaped cross-coupling unit third section strip line (6-3) are adopted
It is realized with LTCC technology.
3. LTCC high-performance micro balun filter according to claim 1, it is characterised in that: first a quarter
Wave resonator (5-1), the second quarter-wave resonance device (5-2), third quarter-wave resonance device (5-3), the 4th
Quarter-wave resonance device (5-4) is arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004754.9A CN109193085A (en) | 2018-08-30 | 2018-08-30 | A kind of LTCC high-performance micro balun filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004754.9A CN109193085A (en) | 2018-08-30 | 2018-08-30 | A kind of LTCC high-performance micro balun filter |
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| Publication Number | Publication Date |
|---|---|
| CN109193085A true CN109193085A (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811004754.9A Pending CN109193085A (en) | 2018-08-30 | 2018-08-30 | A kind of LTCC high-performance micro balun filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380689A (en) * | 2019-07-18 | 2019-10-25 | 中国电子科技集团公司第三十八研究所 | A kind of side couples passive balun on the silicon chip of serpentine structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110227673A1 (en) * | 2010-03-19 | 2011-09-22 | Raytheon Company | Ground structures in resonators for planar and folded distributed electromagnetic wave filters |
| CN102610884A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | Low temperature co-fired ceramic ultra-wideband micro filter |
| CN103413993A (en) * | 2013-08-01 | 2013-11-27 | 南京理工大学 | Distributed miniature band-pass balance filter |
-
2018
- 2018-08-30 CN CN201811004754.9A patent/CN109193085A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110227673A1 (en) * | 2010-03-19 | 2011-09-22 | Raytheon Company | Ground structures in resonators for planar and folded distributed electromagnetic wave filters |
| CN102610884A (en) * | 2012-03-22 | 2012-07-25 | 南京理工大学常熟研究院有限公司 | Low temperature co-fired ceramic ultra-wideband micro filter |
| CN103413993A (en) * | 2013-08-01 | 2013-11-27 | 南京理工大学 | Distributed miniature band-pass balance filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380689A (en) * | 2019-07-18 | 2019-10-25 | 中国电子科技集团公司第三十八研究所 | A kind of side couples passive balun on the silicon chip of serpentine structure |
| CN110380689B (en) * | 2019-07-18 | 2022-09-30 | 中国电子科技集团公司第三十八研究所 | Passive balun on silicon substrate with side edge coupled winding structure |
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Application publication date: 20190111 |
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