CN108183293A - Plane micro-strip duplexer - Google Patents
Plane micro-strip duplexer Download PDFInfo
- Publication number
- CN108183293A CN108183293A CN201711304351.1A CN201711304351A CN108183293A CN 108183293 A CN108183293 A CN 108183293A CN 201711304351 A CN201711304351 A CN 201711304351A CN 108183293 A CN108183293 A CN 108183293A
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- Prior art keywords
- pass filter
- connector
- low
- plane micro
- input terminal
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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
-
- 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
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- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention provides a kind of plane micro-strip duplexers, including microstrip circuit and double-sided copper-clad dielectric-slab, the front of double-sided copper-clad dielectric-slab is equipped with microstrip circuit, copper earth plate is is covered in the back side, the microstrip circuit includes input terminal T connector, high-pass filter, low-pass filter and two output ports, the high-pass filter and low-pass filter are microstrip stubs structure, one end is connected in parallel on by a quarter impedance transformation line on input terminal T connector, and the other end of high-pass filter and low-pass filter connects an output port respectively.Each stub of high-pass filter can be connect by ground hole with scolding tin with covering copper earth plate, is become short-circuit end after connection and is introduced magnetic coupling.The present invention plane micro-strip duplexer have many advantages, such as it is simple in structure, light-weight, small, with interior Insertion Loss it is small, facilitate tuning, manufacturing cost low.
Description
Technical field
The present invention relates to technology for radio frequency fields, and in particular to a kind of plane micro-strip duplexer.
Background technology
Duplexer is the essential device of communication system equipment.It is further tight with wireless communication system frequency resource
It lacks, the requirement to the performance indicator of duplexer is also higher and higher.The volume and cost of reduction duplexer are for entire communication system
The reduction of cost has very important meaning.Highly selective, high isolation, miniaturization, low cost novel duplexer be market
Active demand and the inexorable trend of duplexer development.
At present, duplexer is mainly used in microwave and millimeter wave circuit system, to reach transmission duplex channel and frequency range duplex
The purpose of communication.The major design of duplexer includes the design of wave filter, and can be divided according to the realization method of wave filter：Waveguide junction
Structure, coaxial configuration, microstrip structure duplexer.It is using the characteristics of wave-guide cavity wave and coaxial configuration：Power capacity is big, quality because
Number is high, insertion loss is low, but the working band of these structures is narrow（Relative bandwidth only has a few percent to tens percent）, body
Product is big, the occasion of weight and volumetric constraint can not be used at some.The duplexer realized using planar microstrip structure is general
It is small, light-weight, facilitate tuning, therefore plane duplexer is still widely used in microwave as a kind of structure easy to use
In millimetre-wave circuit.
Invention content
The purpose of the present invention is to provide a kind of plane micro-strip duplexers applied to receive-transmit system, it is intended to solve existing flat
The problems such as volume present in the micro-strip duplexer product of face is big, complicated, in-band insertion loss is big.
Realize the object of the invention technical solution be：A kind of plane micro-strip duplexer, including microstrip circuit and two-sided
Copper dielectric-slab is covered, the front of double-sided copper-clad dielectric-slab is equipped with microstrip circuit, and to cover copper earth plate, the microstrip circuit includes at the back side
Input terminal T connector, high-pass filter, low-pass filter and two output ports, the input termination input terminal T of high-pass filter
Type joint, the output of high-pass filter terminate an output port, and the input termination input terminal T connector of low-pass filter is low
The output of bandpass filter terminates another output port.
The input terminal T connector and two output ports are using 50 ohms impedance match microstrip lines, in distance input
It holds at T connector 3mm and at output port 3mm, ground area is respectively provided with, convenient for input and output connector housings
Ground connection ensures the performance of duplexer.
The high-pass filter is made of four stubs, and stub passes through ground hole scolding tin and double-sided copper-clad dielectric-slab
Cover copper earth plate connection on, after connection become short-circuit end introduce magnetic coupling.
Compared with prior art, the present invention its remarkable advantage is：（1）Using microstrip line construction, facilitate tuning, dielectric-slab
Dielectric constant is 3.3, effectively reduces duplexer volume, realizes miniaturization；（2）It is filtered using microstrip stubs form design high pass
Wave device and low-pass filter reduce the insertion loss in signals transmission；（3）The stub of high-pass filter passes through ground connection
Hole is grounded, and introduces magnetic coupling.
Description of the drawings
Fig. 1 is the plane micro-strip duplexer structure diagram of the present invention.
Fig. 2 is the plane micro-strip duplexer domain schematic diagram of the present invention, wherein（a）For front,（b）For the back side.
Fig. 3 is the plane micro-strip duplexer in-band insertion loss simulation result figure of the present invention.
Fig. 4 is the plane micro-strip duplexer input port return loss simulation result figure of the present invention.
Fig. 5 is two output port return loss simulation result figures of plane micro-strip duplexer of the present invention.
Fig. 6 is 2 port of plane micro-strip duplexer and the 3 interport isolation simulation result figures of the present invention.
Specific embodiment
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings.
With reference to Fig. 1 and Fig. 2, a kind of plane micro-strip duplexer, including microstrip circuit and double-sided copper-clad dielectric-slab, double-sided copper-clad
The front of dielectric-slab is equipped with microstrip circuit, and the back side includes input terminal T connector, high pass to cover copper earth plate, the microstrip circuit
Wave filter, low-pass filter and two output ports, the input termination input terminal T connector of high-pass filter, high-pass filter
Output terminate an output port, low-pass filter input termination input terminal T connector, low-pass filter output termination
Another output port.
The input terminal T connector and two output ports are using 50 ohms impedance match microstrip lines, in distance input
It holds at T connector 3mm and at output port 3mm, ground area is respectively provided with, convenient for input and output connector housings
Ground connection ensures the performance of duplexer.
The length of the input terminal T connector longitudinal direction minor matters is respectivelyWith50 ohms impedance match micro-strips
Line, whereinThe centre frequency of frequency range is used by low-pass filter,The center frequency of frequency range is used by high-pass filter
Rate.To prevent two wave filters from interacting, after simulation optimizationFor 2.9mm,For 5.2mm.
The high-pass filter and low-pass filter are microstrip stubs structure, employ Richard's transformation and Ke Luoda
Rule reduces the insertion loss of duplexer, while this is compact-sized, reduces duplexer volume.
The high-pass filter is made of four stubs, and stub passes through ground hole scolding tin and double-sided copper-clad dielectric-slab
Cover copper earth plate connection on, after connection become short-circuit end introduce magnetic coupling.
The double-sided copper-clad dielectric-slab uses the Rogers4533 planks that dielectric constant is 0.508mm for 3.3, thickness,
Reduce duplexer size.
Embodiment 1
As shown in Figure 1, the plane micro-strip duplexer of the present invention, including microstrip circuit and double-sided copper-clad dielectric-slab, double-sided copper-clad is situated between
The front of scutum is equipped with microstrip circuit, and copper earth plate is is covered in the back side, and the microstrip circuit includes input terminal T connector, high pass is filtered
Wave device, low-pass filter and two output ports, the high-pass filter and low-pass filter are microstrip stubs structure,
One end is connected in parallel on by a quarter impedance transformation line on input terminal T connector, high-pass filter and low-pass filter it is another
End connects an output port respectively.
As shown in Fig. 2, its lateral minor matters of input terminal T connector are 50 ohm of open circuit microstrip lines, inputted by connector outer
Portion's signal.Described two output ports are 50 ohm of open circuit microstrip lines, pass through connector output signal.The high-pass filter
Each stub can be connect by ground hole with scolding tin with covering copper earth plate, is become short-circuit end after connection and is introduced magnetic coupling.
As shown in figure 3, the high-pass filter in the plane micro-strip duplexer uses frequency range as 5.6GHz-6GHz, band
Interior insertion loss be less than -0.5dB, low-pass filter use frequency range be 2.2GHz-2.6GHz, in-band insertion loss less than -
0.5dB。
As shown in figure 4, input port port1 return losses are better than -14dB.
As shown in figure 5, high-pass filter output port port2 return losses standing-wave ratio is better than -16dB, low-pass filter is defeated
Exit port port3 return losses standing-wave ratio is better than -14dB.
As shown in fig. 6, port2, port3 port isolation are more than 38dB.
Claims (7)
1. a kind of plane micro-strip duplexer, it is characterised in that：Including microstrip circuit and double-sided copper-clad dielectric-slab, double-sided copper-clad medium
The front of plate is equipped with microstrip circuit, and the back side includes input terminal T connector, high-pass filtering to cover copper earth plate, the microstrip circuit
Device, low-pass filter and two output ports, high-pass filter input termination input terminal T connector, high-pass filter it is defeated
Go out one output port of termination, the input of low-pass filter terminates input terminal T connector, and the output termination of low-pass filter is another
A output port.
2. plane micro-strip duplexer according to claim 1, it is characterised in that：The input terminal T connector and two it is defeated
Exit port is using 50 ohms impedance match microstrip lines, at the T connector 3mm of distance input end and apart from output port 3mm
Place, is respectively provided with ground area, is grounded convenient for input and output connector housings, ensures the performance of duplexer.
3. plane micro-strip duplexer according to claim 1, it is characterised in that：The input terminal T connector longitudinal direction minor matters
Length be respectivelyWith50 ohms impedance match microstrip lines, whereinFrequency range is used by low-pass filter
Centre frequency,The centre frequency of frequency range is used by high-pass filter.
4. plane micro-strip duplexer according to claim 3, it is characterised in that：It is describedFor 2.89mm,For 5.2mm.
5. plane micro-strip duplexer according to claim 1, it is characterised in that：The high-pass filter and low-pass filter
It is microstrip stubs structure, employs Richard's transformation and Ke Luoda rules, reduces the insertion loss of duplexer, while this
It is compact-sized, reduce duplexer volume.
6. plane micro-strip duplexer according to claim 1 or 5, it is characterised in that：The high-pass filter is short by four
Transversal is formed, and stub is connect with the copper earth plate that covers of double-sided copper-clad dielectric-slab by ground hole scolding tin, become after connection
Short-circuit end introduces magnetic coupling.
7. plane micro-strip duplexer according to claim 1, it is characterised in that：The double-sided copper-clad dielectric-slab uses dielectric
The Rogers4533 planks that constant is 3.3, thickness is 0.508mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304351.1A CN108183293A (en) | 2017-12-11 | 2017-12-11 | Plane micro-strip duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304351.1A CN108183293A (en) | 2017-12-11 | 2017-12-11 | Plane micro-strip duplexer |
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| Publication Number | Publication Date |
|---|---|
| CN108183293A true CN108183293A (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711304351.1A Pending CN108183293A (en) | 2017-12-11 | 2017-12-11 | Plane micro-strip duplexer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029694A (en) * | 2019-12-09 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Microstrip filter |
| CN111146536A (en) * | 2019-12-25 | 2020-05-12 | 南通大学 | Fixed high passageway frequency adjustable duplexer of low passageway frequency |
| CN112864555A (en) * | 2021-01-25 | 2021-05-28 | 南通大学 | Suspension strip line cavity combiner with uniform impedance branch loading |
| CN112910435A (en) * | 2021-01-25 | 2021-06-04 | 武汉光谷航天三江激光产业技术研究院有限公司 | Duplexer device and network implementation method thereof |
| CN113078426A (en) * | 2021-03-12 | 2021-07-06 | 钱塘科技创新中心 | Low-pass filter and manufacturing method thereof |
| CN114122653A (en) * | 2021-11-26 | 2022-03-01 | 电子科技大学 | Implementation method of ultra-wideband band-pass filter applied to 5G frequency band |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202434677U (en) * | 2011-12-21 | 2012-09-12 | 北京普源精电科技有限公司 | High pass filter |
| CN103268968A (en) * | 2013-03-28 | 2013-08-28 | 南京航空航天大学 | High-isolation microstrip duplexer with ultra wide band channel and without matching network |
| CN106299689A (en) * | 2016-08-31 | 2017-01-04 | 电子科技大学 | A kind of ultra broadband low section vertical depolarized omnidirectional antenna |
| CN106654479A (en) * | 2016-12-28 | 2017-05-10 | 中国科学院国家空间科学中心 | Terahertz duplexer built by using waveguide filter |
| CN107004938A (en) * | 2014-12-01 | 2017-08-01 | 华为技术有限公司 | Millimeter Waves Dual-Mode formula duplexer and method |
-
2017
- 2017-12-11 CN CN201711304351.1A patent/CN108183293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202434677U (en) * | 2011-12-21 | 2012-09-12 | 北京普源精电科技有限公司 | High pass filter |
| CN103268968A (en) * | 2013-03-28 | 2013-08-28 | 南京航空航天大学 | High-isolation microstrip duplexer with ultra wide band channel and without matching network |
| CN107004938A (en) * | 2014-12-01 | 2017-08-01 | 华为技术有限公司 | Millimeter Waves Dual-Mode formula duplexer and method |
| CN106299689A (en) * | 2016-08-31 | 2017-01-04 | 电子科技大学 | A kind of ultra broadband low section vertical depolarized omnidirectional antenna |
| CN106654479A (en) * | 2016-12-28 | 2017-05-10 | 中国科学院国家空间科学中心 | Terahertz duplexer built by using waveguide filter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029694A (en) * | 2019-12-09 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Microstrip filter |
| CN111146536A (en) * | 2019-12-25 | 2020-05-12 | 南通大学 | Fixed high passageway frequency adjustable duplexer of low passageway frequency |
| CN111146536B (en) * | 2019-12-25 | 2021-02-02 | 南通大学 | Duplexer with fixed low channel frequency and adjustable high channel frequency and design method |
| CN112864555A (en) * | 2021-01-25 | 2021-05-28 | 南通大学 | Suspension strip line cavity combiner with uniform impedance branch loading |
| CN112910435A (en) * | 2021-01-25 | 2021-06-04 | 武汉光谷航天三江激光产业技术研究院有限公司 | Duplexer device and network implementation method thereof |
| CN113078426A (en) * | 2021-03-12 | 2021-07-06 | 钱塘科技创新中心 | Low-pass filter and manufacturing method thereof |
| CN114122653A (en) * | 2021-11-26 | 2022-03-01 | 电子科技大学 | Implementation method of ultra-wideband band-pass filter applied to 5G frequency band |
| CN114122653B (en) * | 2021-11-26 | 2022-12-23 | 电子科技大学 | Implementation method of ultra-wideband band-pass filter applied to 5G frequency band |
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Application publication date: 20180619 |