CN107732399A - A kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system - Google Patents
A kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system Download PDFInfo
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- CN107732399A CN107732399A CN201711010538.0A CN201711010538A CN107732399A CN 107732399 A CN107732399 A CN 107732399A CN 201711010538 A CN201711010538 A CN 201711010538A CN 107732399 A CN107732399 A CN 107732399A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/20—Magic-T junctions
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Abstract
The invention discloses a kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system, it is made up of double-side printed-wiring board, the pcb board back side is whole face layers of copper, pcb board front circuit includes combining port, the first frequency dividing port, the second frequency dividing port, three frequency division port, 3G＆4G paths and 5G paths, wherein：The 3G＆4G paths and 5G paths pass through T junction combining at combining port；The 5G paths are made up of a high-pass filter, and are connected to three frequency division port；The 3G＆4G paths are made up of first low pass filter, 3G＆4G low-frequency ranges path and 3G＆4G high band path three parts T junction；The 3G＆4G low-frequency ranges path is made up of second low pass filter, and is connected to the first frequency dividing port；The 3G＆4G high bands path is made up of a bandpass filter, and is connected to the second frequency dividing port.
Description
Technical field
The present invention relates to antenna and microwave technical field, more particularly to a kind of ultra wide band for mobile radio system
Three frequency four-port microstrip combiners.
Background technology
With the development of mobile communication technology, the website dense deployment of existing base station, it is more tired to have resulted in base station selection
It is difficult.3G and 4G condition of multi-system coexistence will continue for an extended period of time.In order to reduce site cost, altogether antenna feeder scheme can be with for polyphyly
Solves the problems, such as cost of building a station well, therefore multifrequency antenna arises at the historic moment.
Combiner is the key components in Modern Communication System transceiver, and its performance quality is directly related to whole
Individual communication system.
By using combiner, the multiple signals of different system can be effectively realized, share a set of broad-band antenna.And combining
Device is a core component of multifrequency antenna, and combiner built in existing antenna for base station uses micro-strip combiner scheme more, mainly
Easy to process, cost is low, small volume, is easy to integrate.And traditional micro-strip combiner is all made up of wave filter and match circuit,
But for multifrequency micro-strip combiner, the design of match circuit will become particularly complicated, and the presence of match circuit also increases
The size of combiner is added.Current micro-strip combiner, is substantially the port combiner of double frequency three, and most important application scenarios are
The signal combining of two standards of TD-LTE of the TD-SCDMA and 4G systems of 3G systems, that is, usually said FAD frequency ranges are micro-
Band combiner.With the rapid development of 5G technologies and the announcement of 5G frequency spectrums, though it is foreseeable that will face quickly 5G systems and
The problem of 4G or even 3G shared by multiple systems antenna feeder resources, therefore, the current port combiner of double frequency three, will be unable to use, and need solution badly
The certainly combining problem of more multiband.
The content of the invention
In order to overcome deficiency of the prior art, the present invention provides a kind of ultra wide band three for mobile radio system
Frequency four-port microstrip combiner, solve the problems, such as 5G systems and 4G or even 3G shared by multiple systems antenna feeder resources.
In order to reach foregoing invention purpose, technical scheme is as follows used by solving its technical problem：
A kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system, by double-side printed-wiring board
Be made, the pcb board back side is whole face layers of copper, pcb board front circuit include combining port, the first frequency dividing port, the second frequency dividing port,
Three frequency division port, 3G＆4G paths and 5G paths, wherein：
The 3G＆4G paths and 5G paths pass through T junction combining at combining port；
The 5G paths are made up of a high-pass filter, and are connected to three frequency division port；
The 3G＆4G paths are by first low pass filter, 3G＆4G low-frequency ranges path and 3G＆4G high bands path three
Part is made up of T junction；
The 3G＆4G low-frequency ranges path is made up of second low pass filter, and is connected to the first frequency dividing port；
The 3G＆4G high bands path is made up of a bandpass filter, and is connected to the second frequency dividing port.
Further, first low pass filter and high-pass filter use 5 rank bandpass filters.
Further, second low pass filter and bandpass filter use 3 rank wave filters.
Preferably, the open circuit minor matters are using the step electric impedance resonator of λ/4.
Further, the pcb board selects the high frequency plate of dielectric constant better performances between 2.5~3.5.
Further, the working frequency range of the 3G＆4G low-frequency ranges path is 690~960MHz, and the 3G＆4G high bands lead to
The working frequency range on road is 1700~2700MHz, and the working frequency range of the 5G paths is 3300~3800MHz.
The present invention is allowed to compared with prior art, have the following advantages that and actively imitate due to using above technical scheme
Fruit：
A kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system disclosed by the invention has
Simple in construction, compact in design, the pcb board area used is small, design method is versatile, processing is simple, is adapted to produce in enormous quantities
And the features such as function admirable.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described.It is clear that drawings in the following description are only some embodiments of the present invention, for ability
For field technique personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.It is attached
In figure：
Fig. 1 is PCB in a kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system of the invention
Plate front circuit distribution map；
Fig. 2 is four frequencies in a kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system of the invention
The dividing method figure of micro-strip combiner；
Fig. 3 is three frequencies in a kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system of the invention
Combiner schematic diagram；
Fig. 4 is electrical in a kind of frequency four-port microstrip combiner of ultra wide band three for mobile radio system of the invention
Can datagram.
【Primary symbols explanation】
1- combinings port；
2- first divides port；
3- second divides port；
4- three frequency divisions port；
201-3G＆4G paths；
The low pass filters of 202- first；
203-3G＆4G low-frequency range paths；
204-3G＆4G high band paths；
The low pass filters of 205- second；
206- bandpass filters；
301-5G paths；
302- high-pass filters.
Embodiment
Below with reference to the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
Embodiment one
As shown in figure 1, this application discloses a kind of frequency four-port microstrip of ultra wide band three for mobile radio system
Combiner, it is made up of double-side printed-wiring board, the pcb board back side is whole face layers of copper, and pcb board front circuit includes combining port 1, the
One frequency dividing port 2, second divides port 3, three frequency division port 4,3G＆4G paths 201 and 5G paths 301, wherein：
The 3G＆4G paths 201 and 5G paths 301 pass through T junction combining at combining port 1；
The 5G paths 301 are made up of a high-pass filter 302, and are connected to three frequency division port 4；
The 3G＆4G paths 201 are by first low pass filter 202,3G＆4G low-frequency ranges path 203 and 3G＆4G high frequencies
The three parts of Duan Tonglu 204 are made up of T junction；
The 3G＆4G low-frequency ranges path 203 is made up of second low pass filter 205, and is connected to the first frequency dividing end
Mouth 2；
The 3G＆4G high bands path 204 is made up of a bandpass filter 206, and is connected to the second frequency dividing port 3.
The design method that the present embodiment uses is that frequency range is divided into two parts composition, 3G＆4G system frequency bands and 5G first
System frequency band, by this making frequency dividing path.Then two parts composition, i.e. low-frequency range path are further subdivided into 3G＆4G frequency dividing paths
(690~960MHz) and high band path (1700~2700MHz).Specifically, the work of the 3G＆4G low-frequency ranges path 203
Frequency range is 690~960MHz, and the working frequency range of the 3G＆4G high bands path 204 is 1700~2700MHz, the 5G paths
301 working frequency range is 3300~3800MHz.Wherein, the first corresponding working frequency range in frequency dividing port 2 is 690~960MHz, second
The corresponding working frequency range in frequency dividing port 3 be 1700~2700MHz, the corresponding working frequency range in three frequency division port 4 for 3300~
3800MHz。
Further, first low pass filter 202 and high-pass filter 302 use 5 rank bandpass filters.It is described
Second low pass filter 205 and bandpass filter 206 use 3 rank wave filters.Specifically, in order to ensure the normal of tri-frequency combiner
Work, the good isolation for realizing three roads frequency dividing are crucial.Needing the branch road front end of secondary frequency dividing, it is necessary to assure have fairly good
Return loss, insertion loss and Out-of-band rejection.Therefore, low pass filter 202 and high-pass filter 302 use 5 rank band logicals
Wave filter designs, and higher exponent number can provide more preferable Out-of-band rejection.Therefore, low pass filter 202 and high-pass filter 302
There are 5 open circuit minor matters, bending is handled for reducing pcb board area.It is same in order to reduce face on the premise of performance is ensured
Product, the second low pass filter 205 and bandpass filter 206 are designed using 3 ranks, therefore have 3 open circuit minor matters, minimum 2 minor matters.
Preferably, the open circuit minor matters are using the step electric impedance resonator of λ/4.In the present embodiment, utensil is filtered in order to allow
There is more flexible transmission zero, by all open circuit minor matters λ/4 step electric impedance resonator (SIR, Stepped
Impendence Resonator, step electric impedance resonator) to realize, transmission zero can be different by the twolink on SIR
Impedance ratio control, impedance ratio can also influence the total length of SIR, less impedance ratio can realize shorter length, because
This can flexibly control the length of open circuit minor matters.
Further, the pcb board selects the high frequency plate of dielectric constant better performances between 2.5~3.5.
It is convenient to weld coaxial cable in order to which signal transmits in the present embodiment, port 2, the are divided in combining port 1, first
Pad is equipped with two divided-frequency port 3 and three frequency division port 4, for welding coaxial cable outer conductor, combining port 1, first
Divide port 2, second and divide port 3 and the welding cable cored wire of three frequency division port 4, and pad pitch signal port face is about
1mm, avoid short circuit.Some grounding through hole are provided with pad simultaneously, good earth is formed with pcb board back side layers of copper.
Multifrequency micro-strip combiner is different from wideband microstrip combiner, in order to realize the good isolation of each branch and effective work
Make, using the mentality of designing divided step by step.The tri-frequency combiner of the present embodiment, it is one group using 3G＆4G frequency ranges, 5G frequency ranges
One group is individually for, then carries out second of frequency dividing again.By taking four frequency micro-strip combiners as an example, as shown in Fig. 2 by adjoining two
Frequency range is combined into one group, forms frequency dividing combining for the first time, is then divided combining for the second time by two groups again, finally obtains four frequencies and closes
Road device.Wherein used wave filter can use the open circuit SIR of λ/4 to realize.
Embodiment two
As shown in figure 3, when first time dividing combining, 3G＆4G low-frequency ranges path (690~960MHz) can individually be made
For all the way, 3G＆4G high bands path (1700~2700MHz) and 5G paths 301 (3300~3800MHz) composition are other all the way,
Then separated again when second divides again, 3G＆4G high bands path (1700~2700MHz) and 5G paths, finally still obtain 3
Individual port.Accordingly in this frequency dividing mode, in order to ensure the superperformance of the secondary frequency dividing of 301 branch roads, 301 branch roads employ
The terminal short circuit step electric impedance resonator SIR of the λ of 5 minor matters/4.And other three wave filters, be 3 minor matters the open circuit rank of λ/4
Terraced electric impedance resonator SIR.
In addition, as shown in fig. 4, it can be seen that, reflectance factor S11 is respectively less than -15dB in three frequency ranges, three passbands
Insertion loss S21 is respectively less than 1dB, and Out-of-band rejection is all higher than 30dB, and this is for micro-strip combiner, function admirable.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (6)
- A kind of 1. frequency four-port microstrip combiner of ultra wide band three for mobile radio system, by double-side printed-wiring board system Into the pcb board back side is whole face layers of copper, it is characterised in that pcb board front circuit includes combining port, the first frequency dividing port, second Port, three frequency division port, 3G＆4G paths and 5G paths are divided, wherein：The 3G＆4G paths and 5G paths pass through T junction combining at combining port；The 5G paths are made up of a high-pass filter, and are connected to three frequency division port；The 3G＆4G paths are by first low pass filter, 3G＆4G low-frequency ranges path and 3G＆4G high band path three parts It is made up of T junction；The 3G＆4G low-frequency ranges path is made up of second low pass filter, and is connected to the first frequency dividing port；The 3G＆4G high bands path is made up of a bandpass filter, and is connected to the second frequency dividing port.
- A kind of 2. frequency four-port microstrip combining of ultra wide band three for mobile radio system according to claim 1 Device, it is characterised in that first low pass filter and high-pass filter use 5 rank bandpass filters, have 5 open circuit branches Section.
- A kind of 3. frequency four-port microstrip combining of ultra wide band three for mobile radio system according to claim 1 Device, it is characterised in that second low pass filter and bandpass filter use 3 rank wave filters, have 3 open circuit minor matters.
- 4. a kind of frequency four-port microstrip of ultra wide band three for mobile radio system according to Claims 2 or 3 closes Road device, it is characterised in that the open circuit minor matters are using the step electric impedance resonator of λ/4.
- A kind of 5. frequency four-port microstrip combining of ultra wide band three for mobile radio system according to claim 1 Device, it is characterised in that the pcb board selects the high frequency plate of dielectric constant better performances between 2.5~3.5.
- A kind of 6. frequency four-port microstrip combining of ultra wide band three for mobile radio system according to claim 1 Device, it is characterised in that the working frequency range of the 3G＆4G low-frequency ranges path is 690~960MHz, the 3G＆4G high bands path Working frequency range be 1700~2700MHz, the working frequency range of the 5G paths is 3300~3800MHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711010538.0A CN107732399B (en) | 2017-10-25 | 2017-10-25 | Ultra-wideband tri-frequency four-port microstrip combiner for wireless mobile communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711010538.0A CN107732399B (en) | 2017-10-25 | 2017-10-25 | Ultra-wideband tri-frequency four-port microstrip combiner for wireless mobile communication system |
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| CN107732399B CN107732399B (en) | 2022-07-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649971A (en) * | 2018-08-20 | 2018-10-12 | 维沃移动通信有限公司 | A kind of terminal device |
| CN109301457A (en) * | 2018-10-15 | 2019-02-01 | 京信通信系统（中国）有限公司 | Antenna for base station and its feeding network system |
| CN111710948A (en) * | 2020-05-18 | 2020-09-25 | 深圳市南斗星科技有限公司 | Combiner |
| CN112909464A (en) * | 2021-01-25 | 2021-06-04 | 中天通信技术有限公司 | Microstrip combiner with uniform impedance branch loading |
| CN116826342A (en) * | 2023-06-12 | 2023-09-29 | 佛山市迪安通讯设备有限公司 | Three-frequency microstrip combiner |
| CN116995386A (en) * | 2023-08-09 | 2023-11-03 | 佛山市粤海信通讯有限公司 | Out-of-band suppression enhanced combiner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112909464B (en) * | 2021-01-25 | 2021-11-02 | 中天通信技术有限公司 | Microstrip combiner with uniform impedance branch loading |
| CN116826342A (en) * | 2023-06-12 | 2023-09-29 | 佛山市迪安通讯设备有限公司 | Three-frequency microstrip combiner |
| CN116995386A (en) * | 2023-08-09 | 2023-11-03 | 佛山市粤海信通讯有限公司 | Out-of-band suppression enhanced combiner |
| CN116995386B (en) * | 2023-08-09 | 2024-02-23 | 佛山市粤海信通讯有限公司 | Out-of-band suppression enhanced combiner |
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