CN101800586A - Uplink multi-system combiner for mobile communication - Google Patents
Uplink multi-system combiner for mobile communication Download PDFInfo
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- CN101800586A CN101800586A CN201010102515A CN201010102515A CN101800586A CN 101800586 A CN101800586 A CN 101800586A CN 201010102515 A CN201010102515 A CN 201010102515A CN 201010102515 A CN201010102515 A CN 201010102515A CN 101800586 A CN101800586 A CN 101800586A
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- electric bridge
- frequency band
- isolator
- mobile communication
- frequency range
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Abstract
The invention discloses an uplink multi-system combiner for mobile communication, which comprises a bridge, an isolator and a frequency band filter for inputting at least two channels of uplink signals. The frequency band filter, the isolator and the bridge are connected in sequence, wherein the isolator is arranged in the direction from the bridge to the frequency band filter, and the bridge outputs the uplink signals. The combiner has the advantage of low return loss, and can avoid mismatch after combination.
Description
Technical field
The present invention relates to a kind of mobile communication equipment, relate in particular to a kind of uplink multi-system combiner for mobile communication.
Background technology
Under existing mobile communication overlay network, a plurality of common carriers are arranged usually and deposit operation, these common carriers are built the covering system of oneself respectively, and the repeated construction problem of being brought is more and more outstanding.Solution is to adopt multisystem mixing platform, it needing to be mainly used in heavy construction that multiple-network system inserts, the urban operating mechanism, as places such as large-scale museum, subway, railway station, airport, office offices of government, can realize that multiband, many signals close the road function, the overlapping investment of avoiding indoor distributed system to build is the effective means of the compatible covering of the many network signals of a kind of realization.
In this multisystem mixing platform; occur adhering to different system separately but the channel of the continuous frequency range that signal links to each other closes the road situation through regular meeting; this structure can't use microwave filtering mixer commonly used directly to realize, needs to use the wideband mixer that has port isolation, as the 3dB electric bridge.But this structure of 3dB electric bridge can only accomplish with coupling frequently, though homogenous frequency signal can not close road output via the 3dB electric bridge, will be after closing the road mismatch.This will greatly worsen the upward signal receiving ability.
The road system of closing of Fig. 1 for example, mixer one output comprises the channel of 885MHz-909MHz, mixer two outputs comprise the channel of 909MHz-915MHz, these two mixers need be closed the road once more, and require certain isolation, this just need use the 3dB electric bridge, and at 3dB electric bridge output, the return loss of these two channels is all with very poor.
On December 10th, 2003, disclosed Chinese utility model patent was described a kind of mobile communication multinet junction indoor covering system for No. 02249827.3, the up-link of described system comprises filter, two-in-one or electric bridge, isolator and the repeater that connects successively, the isolator effect that adds is the isolation that improves unlike signal, the standing-wave ratio of improving each port, but because behind filter, directly add electric bridge, electric bridge makes signal mismatch after closing the road, still can't avoid closing mismatch behind the road, technical problem that return loss is bigger.
Summary of the invention
The technical problem that the present invention mainly solves provides the uplink multi-system combiner for mobile communication that a kind of return loss is less, avoid closing mismatch behind the road.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of uplink multi-system combiner for mobile communication is provided, comprise electric bridge, isolator and import the frequency band filter of two-way upward signal at least, described frequency band filter, isolator and electric bridge connect successively, described isolator direction be from electric bridge to frequency band filter, described electric bridge is exported described upward signal.
Wherein, described electric bridge is the 3dB electric bridge.
Wherein, comprise antenna and load, described 3dB electric bridge connects described antenna and load.
Wherein, described frequency band filter quantity is two, and isolator quantity is that two, one described frequency band filters are connected to a described 3dB electric bridge by an isolator.
Wherein, described upward signal is the continuous frequency range of two-way, inputs to two described frequency band filters respectively.
Wherein, described upward signal is continuous frequency range of two-way and the discontinuous frequency range of two-way, and the continuous frequency range of described two-way inputs to two described frequency band filters respectively, and the discontinuous frequency range of described two-way inputs to described two described frequency band filters respectively.
The invention has the beneficial effects as follows: be different from prior art and make filter in up-link, two-in-one or electric bridge, the structure that isolator and repeater connect successively still can't avoid closing mismatch behind the road, the situation that return loss is bigger, the present invention is located at isolator between frequency band filter and the electric bridge dexterously, utilize the signal one-way of isolator and isolator full frequency band absorbability for reflected signal, sponge by electric bridge merit branch and output to filter but because not in the filter working band and the signal of reflected back, be the full frequency band coupling that has realized the electric bridge two-port in essence, make the return loss of ANT port up to standard.So do not need to increase extra element or circuit, both can after solving the insurmountable always adding electric bridge of prior art dexterously under the situation about not raising the cost, make and close road mismatch, technical problem that return loss is bigger.
Description of drawings
Fig. 1 is that the continuous frequency range of prior art is closed the system block diagram on road;
Fig. 2 is that uplink multi-system combiner for mobile communication embodiment one 885-909MHz of the present invention and the continuous frequency range of 909-915MHz are closed the system block diagram on road;
Fig. 3 is that uplink multi-system combiner for mobile communication embodiment two 885-909MHz of the present invention and 806-821MHz close road, 909-915MHz and 824-835MHz and close the continuous frequency range of closing the road after the road again and close the system block diagram on road.
Embodiment
By describing technology contents of the present invention, structural feature in detail, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
See also Fig. 2, uplink multi-system combiner for mobile communication embodiment of the present invention comprises:
The frequency band filter of electric bridge, isolator and input two-way or above upward signal;
Described frequency band filter, isolator and electric bridge connect successively;
Described isolator direction be from electric bridge to frequency band filter, described electric bridge is exported described upward signal.
Each road upward signal closes the road through frequency band filter, before the electric bridge that arrives the back, and the processing of process isolator earlier, isolator is owing to have the signal one-way, and carry out full frequency band for the reflected signal from electric bridge and absorb, the signal that passes through enters electric bridge, back output.
More specifically, a plurality of filters or mixer such as tree structure cascade form, occur continuous frequency range close the road demand time, introduce electric bridge and close the road, before electric bridge, add the isolator of corresponding band, can realize the coupling of corresponding frequency band at the electric bridge output port.
Below as can be seen, prior art up-link make still can't avoid closing the road in filter, two-in-one or the structure that electric bridge, isolator and repeater connect successively after mismatch, technical problem that return loss is bigger, this is because in this connected mode, two delivery outlets of electric bridge connect the filter or the mixer of two different frequency ranges respectively, and these two filters or mixer are just realized impedance matching in their working frequency range own, to the very poor or total reflection of frequency range external signal coupling own.From electric bridge ANT port, each frequency range all is that port of the own frequency range correspondence of coupling accordingly, and the another port is in mismatch or total reflection state to frequency range own.The result who embodies is exactly that up electric bridge ANT port is all very poor in all return losses of closing the road frequency range.The present invention is located at isolator between frequency band filter and the electric bridge dexterously, utilize the signal one-way of isolator and isolator full frequency band absorbability for reflected signal, sponge by electric bridge merit branch and output to filter but owing to the signal that in the filter working band, does not reflect, be the full frequency band coupling that has realized the electric bridge two-port in essence, make the return loss of ANT port up to standard, can mismatch when making signal pass through electric bridge, do not need to increase extra element or circuit, both can after solving the insurmountable always adding electric bridge of prior art dexterously under the situation about not raising the cost, make and close the road mismatch, the technical problem that return loss is bigger.
Be to utilize the signal one-way of isolator and isolator full frequency band absorbability among the present invention, perfectly solve continuous frequency range and close the port mismatch problems that the road uses bridge solution to cause for reflected signal.The present invention mainly is in order to solve the multiband of multi-operator, and the shared antenna feeder of multi-modulation scheme communication system covers and development product, estimates can have the increasing market space at 3G and epoch afterwards.
In one embodiment, described electric bridge is the 3dB electric bridge.
Also as shown in Figure 2, may further include antenna and load, described 3dB electric bridge connects described antenna and load.
In one embodiment, described frequency band filter quantity is two, and isolator quantity is that two, one described frequency band filters are connected to a described 3dB electric bridge by an isolator.
In another embodiment, described upward signal is the continuous frequency range of two-way, inputs to two described frequency band filters respectively.
Consult Fig. 3, described upward signal can be continuous frequency range of two-way and the discontinuous frequency range of two-way, totally four tunnel frequency ranges, the continuous frequency range of described two-way inputs to two described frequency band filters respectively, and the discontinuous frequency range of described two-way also inputs to described two described frequency band filters respectively, when can guarantee between the discontinuous frequency range of two-way, certain isolation is arranged, realize that the continuous frequency range of the continuous frequency range of two-way is closed the road.
Corresponding the foregoing description, hereinafter, closing the road with mobile GSM uplink band 885-909MHz, the GSM of UNICOM uplink band 909-915MHz is example, and the principle of the invention and specific implementation method are described.
As shown in Figure 2, the two-way upward signal passes through the corresponding band filter respectively earlier, connects the corresponding band isolator again, closes road output with the 3dB electric bridge at last.That can realize continuous frequency range closes road output, can guarantee that again the input and output return loss of whole system touches the mark simultaneously, i.e. matched well.Use design of the present invention, can realize conveniently that mobile GSM uplink band 885-909MHz, the GSM of UNICOM uplink band 909-915MHz close the road, and it is simple to close line structure.
As shown in Figure 3, with mobile GSM uplink band 885-909MHz, the GSM of UNICOM uplink band 909-915MHz, the up 806-821MHz of TETRA800MHz, it is example that the up 824-835MHz of CDMA800MHz closes the road, can earlier 885-909MHz and 806-821MHz be closed the road, 909-915MHz and 824-835MHz close the road in addition, latter two mixer re-use the 3dB electric bridge and close the road, and between two mixers and electric bridge, add to point to the isolator of mixer, can guarantee between 806-821MHz and 824-835MHz, to have in certain isolation, realize that the continuous frequency range of 885-909MHz and 909-915MHz is closed the road.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (6)
1. uplink multi-system combiner for mobile communication, it is characterized in that, comprise electric bridge, isolator and import the frequency band filter of two-way upward signal at least, described frequency band filter, isolator and electric bridge connect successively, described isolator direction be from electric bridge to frequency band filter, described electric bridge is exported described upward signal.
2. uplink multi-system combiner for mobile communication according to claim 1 is characterized in that: described electric bridge is the 3dB electric bridge.
3. uplink multi-system combiner for mobile communication according to claim 2 is characterized in that: comprise antenna and load, described 3dB electric bridge connects described antenna and load.
4. according to each described uplink multi-system combiner for mobile communication of claim 1 to 3, it is characterized in that: described frequency band filter quantity is two, isolator quantity is that two, one described frequency band filters are connected to a described 3dB electric bridge by an isolator.
5. uplink multi-system combiner for mobile communication according to claim 4 is characterized in that: described upward signal is the continuous frequency range of two-way, inputs to two described frequency band filters respectively.
6. uplink multi-system combiner for mobile communication according to claim 4, it is characterized in that: described upward signal is continuous frequency range of two-way and the discontinuous frequency range of two-way, the continuous frequency range of described two-way inputs to two described frequency band filters respectively, and the discontinuous frequency range of described two-way inputs to described two described frequency band filters respectively.
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| CN201010102515A CN101800586A (en) | 2010-01-28 | 2010-01-28 | Uplink multi-system combiner for mobile communication |
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| CN201010102515A CN101800586A (en) | 2010-01-28 | 2010-01-28 | Uplink multi-system combiner for mobile communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105721009A (en) * | 2016-04-26 | 2016-06-29 | 中国电子科技集团公司第三十八研究所 | Bandwidth variable digital channel synthesizer, decomposer and bandwidth variable digital channel synthesizer and decomposer |
| CN106160781A (en) * | 2016-08-22 | 2016-11-23 | 杭州弘塔通信技术有限公司 | The indoor distributed system of various wireless communication standard fusion and method of work thereof |
| CN106936490A (en) * | 2016-12-27 | 2017-07-07 | 南京泰通科技股份有限公司 | Dual-port GSM R digital optical fiber direct station equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335934A (en) * | 2008-07-31 | 2008-12-31 | 京信通信系统（中国）有限公司 | Multi-system access platform and multiple frequency band demultiplexer and multiplexer composite device |
-
2010
- 2010-01-28 CN CN201010102515A patent/CN101800586A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335934A (en) * | 2008-07-31 | 2008-12-31 | 京信通信系统（中国）有限公司 | Multi-system access platform and multiple frequency band demultiplexer and multiplexer composite device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105721009A (en) * | 2016-04-26 | 2016-06-29 | 中国电子科技集团公司第三十八研究所 | Bandwidth variable digital channel synthesizer, decomposer and bandwidth variable digital channel synthesizer and decomposer |
| CN106160781A (en) * | 2016-08-22 | 2016-11-23 | 杭州弘塔通信技术有限公司 | The indoor distributed system of various wireless communication standard fusion and method of work thereof |
| CN106160781B (en) * | 2016-08-22 | 2018-11-13 | 杭州弘塔通信技术有限公司 | The indoor distributed system and its working method of various wireless communication standard fusion |
| CN106936490A (en) * | 2016-12-27 | 2017-07-07 | 南京泰通科技股份有限公司 | Dual-port GSM R digital optical fiber direct station equipment |
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Application publication date: 20100811 |