CN206602163U

CN206602163U - A kind of high-isolation POI combining systems

Info

Publication number: CN206602163U
Application number: CN201720294459.6U
Authority: CN
Inventors: 汪海英; 黄磊
Original assignee: Rosenberger Technology Kunshan Co Ltd
Current assignee: Prologis Communication Technology Suzhou Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2017-10-31
Anticipated expiration: 2027-03-24

Abstract

The utility model discloses a kind of high-isolation POI combining systems, including at least one FDD input, at least one TDD input and a plurality of base station signal inputs, each FDD inputs and TDD inputs are connected to filter unit, filter unit is connected with electric bridge, electric bridge includes a plurality of bridge outputs, per bridge output all the way combiner is connected to together with base station signal input, and it is output to antenna end, wherein, filter unit includes at least two wave filters, the utility model by improving POI system FDD and TDD different communication networks between isolation, the outer garbage signal of anti-stop-band causes clutter interference or obstruction interference to equipment, meet multi signal combining communication system requirements.

Description

A kind of high-isolation POI combining systems

Technical field

The utility model is related to a kind of POI combinings system, more particularly, to a kind of high-isolation POI combining systems.

Background technology

POI（Point Of Interface）For multisystem mixing platform, it is mainly used in needing multiple-network system to access Heavy construction, in urban operating mechanism, such as large-scale museum, subway, railway station, airport, government office place are realized many Frequency range, multi signal combining function, it is to avoid the overlapping investment that indoor distributed system is built, are that one kind is realized that Multi net voting signal is simultaneous and covered Effective means are covered, and ensure not interfereing with each other between each signal.

In existing mobile communication technology, there is TDD（Time Division Duplexing, time division duplex）And FDD （Frequency Division Duplexing, FDD）Two kinds of dual-modes, both TDD modes are in movement In Communications Market, occupy certain ratio, tdd mode and fdd mode both of which are by long-term co-existence, and this requires mobile whole End can both compatible patterns.Due between the FDD communication frequencys of LTE 2600 in POI systems and the TDD communication frequencys of LTE 2600 Low isolation between only 5MHz, different communication network easily makes to cause equipment clutter interference or resistance with outer garbage signal Plug interference, causes communication system can not normal work.

Utility model content

The purpose of this utility model is the defect for overcoming prior art there is provided a kind of high-isolation POI combining systems, Utility model is prevented by improving the isolation between the FDD of POI systems LTE 2600 and the TDD different communication networks of LTE 2600 The outer garbage signal of stop-band causes clutter interference or obstruction interference to equipment.

To achieve the above object, the utility model proposes following technical scheme：A kind of high-isolation POI combining systems, institute Stating POI combinings system includes at least one FDD input, at least one TDD input and a plurality of base station signal inputs, often Individual FDD inputs and TDD inputs are connected to filter unit, and the filter unit is connected with electric bridge, and the electric bridge includes A plurality of bridge outputs, are connected to combiner, and export per bridge output all the way together with the base station signal input To antenna end, wherein, the filter unit includes at least two wave filters.

Preferably, the Out-of-band rejection of each wave filter is at least up to 43dB.

Preferably, the isolation of hybrid coupler at least 25dB.

Preferably, the quantity of the FDD inputs is three.

Preferably, the quantity of the TDD inputs is one.

Preferably, the electric bridge enters four for four and goes out electric bridge.

Preferably, plural road signal line is formed between the combiner and the antenna end, wherein signal line all the way On be provided with coupler, the coupler and be connected with monitoring output end.

The utility model improves the isolation between FDD and TDD different communication networks, meets multi signal combining communication system System is required, it is to avoid clutter interference or obstruction interference are caused to equipment with outer garbage signal.

Brief description of the drawings

Fig. 1 is the utility model POI combining system schematics.

Reference：1st, base station signal input, 2, FDD inputs, 3, TDD inputs, 4, wave filter, 5, electric bridge, 51, Bridge output, 6, combiner, 7, antenna end, 8, coupler, 9, monitoring output end.

Embodiment

Below in conjunction with accompanying drawing of the present utility model, the technical scheme progress to the utility model embodiment is clear, complete Description.

As shown in figure 1, the utility model high-isolation POI combining systems are primarily adapted for use in LTE2600 FDD/TDD combinings System, including four base station signal inputs 1, three FDD inputs 2 and a TDD input 3, each He of FDD inputs 2 TDD inputs 3 are connected to two wave filters 4, and then connection four enters four and goes out electric bridge 5, then together with base station signal input 1 Combiner 6 is connected, antenna end 7 is finally directly output to, the utility model improves LTE2600 by setting two wave filters Isolation between FDD and LTE2600 TDD different communication networks, meets multi signal combining communication system requirements, it is to avoid band is outer Garbage signal causes clutter interference or obstruction interference to equipment.

Specifically, the wave filter is coaxial cavity filter, and the Out-of-band rejection of each wave filter is at least 43dB, four The isolation entered between the four isolation 25dB for going out electric bridge 5, such LTE2600 FDD and LTE2600 TDD different operators has More than 110dB, substantially increases isolation.

Further say, the combiner is two frequency combiners, shape between two frequency combiner 6 and the antenna end 7 Pluralized road signal line, wherein being provided with coupler 8 on signal line all the way, monitoring output end is connected with the coupler 9, monitor the working condition of multi-band signal combining system.

The utility model FDD is LTE2600 systems, and the scope of its emission band is 2620-2690MHz, frequency acceptance band Scope is 2500-2570MHz.In this specific embodiment, FDD inputs include FDD-1, FDD-2 and FDD-3, cover LTE2600 whole frequency range, optionally, the quantity of FDD inputs can also be wherein one or two.Fig. 1 is shown Four, which enter four, goes out bridge structure, and described four, which enter four, which goes out electric bridge, includes four bridge outputs 51, per bridge output all the way and all the way Base station signal input 1 is connected to combiner together, and four road bridge outputs 51 are distinguished with four base station signal inputs 1 respectively It is connected, then is connected with the antenna end 7 with two frequency combiners 6.

The utility model accesses two same coaxial cavities in LTE2600 FDD and LTE2600 TDD input ports respectively Fluid filter, then connects four and enters four and go out electric bridge again.Coaxial cavity filter Out-of-band rejection 43dB, four, which enter four, goes out isolation of hybrid coupler Isolation between 25dB, such LTE2600 FDD and LTE2600 TDD different operators has more than 110dB, meets many letters Number combining communication system requirements；Optionally, each filter unit can also be three or three with upper filter, filtering list Total Out-of-band rejection of member is 86dB or more, is set by high-isolation and avoids causing spuious to equipment with outer garbage signal Interference or obstruction interference.

Technology contents and technical characteristic of the present utility model are had revealed that as above, but those skilled in the art still may be used A variety of replacements and modification without departing substantially from the utility model spirit can be made based on teaching of the present utility model and announcement, therefore, this Utility model protection scope should be not limited to the content disclosed in embodiment, and should include various without departing substantially from replacement of the present utility model And modification, and covered by present patent application claim.

Claims

1. a kind of high-isolation POI combining systems, it is characterised in that：The POI combinings system is inputted including at least one FDD End, at least one TDD input and a plurality of base station signal inputs, each FDD inputs and TDD inputs are connected to Filter unit, the filter unit is connected with electric bridge, and the electric bridge includes a plurality of bridge outputs, per bridge output all the way Combiner is connected to together with the base station signal input, and is output to antenna end, wherein, the filter unit is included at least Two wave filters.

2. high-isolation POI combining systems according to claim 1, it is characterised in that the Out-of-band rejection of each wave filter At least up to 43dB.

3. high-isolation POI combining systems according to claim 1 or 2, it is characterised in that the isolation of hybrid coupler is at least 25dB。

4. high-isolation POI combining systems according to claim 1, it is characterised in that the quantity of the FDD inputs is Three.

5. high-isolation POI combining systems according to claim 4, it is characterised in that the quantity of the TDD inputs is One.

6. high-isolation POI combining systems according to claim 1, it is characterised in that the electric bridge enters four for four and goes out electricity Bridge.

7. high-isolation POI combining systems according to claim 1, it is characterised in that the combiner and the antenna Plural road signal line is formed between end, wherein being provided with coupler on signal line all the way, prison is connected with the coupler Control output end.