CN1091551C - SW multiradio share antenna isolating coupling system - Google Patents
SW multiradio share antenna isolating coupling system Download PDFInfo
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- CN1091551C CN1091551C CN 97119878 CN97119878A CN1091551C CN 1091551 C CN1091551 C CN 1091551C CN 97119878 CN97119878 CN 97119878 CN 97119878 A CN97119878 A CN 97119878A CN 1091551 C CN1091551 C CN 1091551C
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- phase shifter
- antenna
- coupler
- isolating
- phase
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Abstract
The present invention relates to a multi-machine sharing antenna isolation coupled system which comprises a three-mould matching feeding network and an antenna and a multi-path isolation coupler, wherein the multi-path isolation coupler is connected with the three-mould matching feeding network by a high frequency transmission line; the multi-path isolation coupler is formed by connecting more than two output ends of a signal isolation coupler in series, and the signal isolation coupler is composed of two completely identical transformers with broadband transmission lines T, two pairs of completely identical all-pass network phase shifters and two completely identical filters. The present invention improves utilization rates of the antenna, and greatly reduces occupation areas of the antenna; thus, operation frequency range of the antenna can be thoroughly utilized.
Description
Technical field
The present invention relates to the isolating coupling system that the shortwave emission system is used, the multi-machine shared antenna isolation coupled system of using in the particularly a kind of point-to-multipoint communication system.
Technical background
Domestic and international existing transmitter sharing system is three transmitter sharing systems that are made of three mould matched feed network and antenna, can only be because of it by three shared antennas of transmitter, and therefore it line use ratio is not high.In order to realize the communication more than three tunnel, can only increase such system again, this can increase the floor space of antenna undoubtedly again greatly.In addition, multiple signals need isolation coupling, and present multichannel isolating coupler is based on cutting back transmission line principle more and based on the trap circuit principle, because these two kinds of isolating couplers tuning difficulty when operating frequency changes, only be suitable for a job frequently, and this needs the frequent characteristics that change operating frequency to contradict with short wave communication, therefore is not widely used in actual product.The external multichannel isolating coupler of producing that is made of the filter parallel connection has two frequency channels, passage be in the antenna working band than in the low-frequency range, another passage is in the higher frequency band of antenna working band, two transmitters are operated in respectively in one of them passage, operating frequency can change arbitrarily in corresponding passage, and does not need tuning coupler.Low passage to the isolation of high channel by the decay decision of high channel filter stop bend in low passage, same, high channel to the isolation of low passage by the decay decision of low-channel filter stopband in high channel.Usually require isolation to be not less than 30dB, therefore, the interchannel interval of height promptly is to be that the frequency bandwidth of 30dB is called the protection bandwidth from the filter passband edge to stopband attenuation.As seen, this coupler protection frequency band broad can not make full use of the working band of antenna.
Summary of the invention
The object of the present invention is to provide a kind of SW multiradio share antenna isolating coupling system, improve day line use ratio and the antenna floor space is significantly reduced.
Further aim of the present invention is by adopting the protection frequency band narrow and do not need tuning multichannel isolating coupler in this system, the working band of antenna can being made full use of.
For achieving the above object, the present invention takes following technical scheme: SW multiradio share antenna isolating coupling system, comprise three mould matched feed network and antennas, it also comprises the multichannel isolating coupler, the multichannel isolating coupler is connected by high frequency transmission line with three mould matched feed network, described multichannel isolating coupler is formed by the cascade of plural Signal Spacing coupler, the Signal Spacing coupler is by two identical broadband transmission-line transformer evil spirit T, two pairs of identical all-pass network phase shifter and two identical filters are formed, and by magic T, phase shifter, filter, phase shifter, the order of evil spirit T connects in turn according to input/output relation, two pairs of phase shifters are the diagonal symmetry with respect to filter, two phase shifter Φ A of every pair of phase shifter, the phase difference of Φ B is 90 °.
Phase shifter Φ A is made up of inductance L a1, La2, capacitor C a1, Ca2, and phase shifter Φ B is made up of inductance L b1, Lb2, capacitor C b1, Cb2, the common ends ground connection of phase shifter Φ A, Φ B.
The present invention combines with multichannel isolating coupler and three mould matched feed network, make multi-section transmitter (9-12 portion) shared one pair of antenna simultaneously, antenna is in broadband, comprehensive, multi-beam work, any communication on the different distance far away in can realizing closely to multiple spot, this has not only improved the utilance of antenna, and has greatly reduced antenna farm, cuts down expenses, safeguard time saving and energy saving convenience, improved electromagnetic environment in addition.Multichannel isolating coupler of the present invention protection frequency band is narrow and do not need tuningly, and the working band of antenna is fully utilized.Be dual isolation between some road road, the isolation height, these roads can receive sender respectively and work simultaneously, are independent of each other.
Description of drawings
Fig. 1 is a block diagram of the present invention;
Fig. 2 is the theory diagram of multichannel isolating coupler of the present invention;
Fig. 3 is the circuit theory diagrams of Signal Spacing coupler;
Fig. 4,5 is respectively the block diagram and the schematic diagram of three mould matched feed network;
Fig. 6,7 is respectively the structural representation of antenna soft drawn wire fixation and four earth anchorage methods;
Fig. 8,9 is respectively Fig. 6,7 vertical view.
Embodiment
As shown in Figure 1, SW multiradio share antenna isolating coupling system is made of multichannel isolating coupler, three mould matched feed network, antenna, and the multichannel isolating coupler is connected by high frequency transmission line (coaxial cable) with three mould matched feed network.As shown in Figure 2, the multichannel isolating coupler is formed by the cascade of plural Signal Spacing coupler, the Signal Spacing coupler claims phase device and two identical filters to form by two identical broadband transmission-line transformer evil spirit T, two pairs of identical all-pass networks, and connect in turn according to input/output relation by the order of magic T, phase shifter, filter, phase shifter, magic T, two pairs of phase shifters are the diagonal symmetry with respect to filter, and the phase difference of two phase shifter Φ A, Φ B of every pair of phase shifter is 90 °.As shown in Figure 3, phase shifter Φ A is made up of inductance L a1, La2, capacitor C a1, Ca2, and phase shifter Φ B is made up of inductance L b1, Lb2, capacitor C b1, Cb2, the common ends ground connection of phase shifter Φ A, Φ B.
Each port input/output relation of evil spirit T is: when signal was imported from the C end, by A, the output of B two ends constant amplitude homophase, D held no-output; When signal was imported from the D end, by A, the anti-phase output of B two ends constant amplitude, C held no-output; Signal is from A, when B two ends constant amplitude homophase is imported, and from the synthetic output of C end, D holds no-output; Signal is during from A, the anti-phase input of B two ends constant amplitude, and from the synthetic output of D end, C holds no-output.As seen C, D end is isolated all the time, and isolation is equal to or greater than 30dB.If signal F1 is in the passband of filter, suppose from the input of C end, then from A, the output of B two ends constant amplitude homophase, after phase shift for the first time, by filter, arrive A ', B ' 2 points through the phase shift second time more smoothly, its phase relation is constant, still be the constant amplitude homophase, therefore, from the synthetic output of C ' end.If signal F2 is in the stopband of filter, and through the input of D ' end, then from A ', the anti-phase output of B ' two ends constant amplitude, be reflected through arriving filter behind the phase shifter, get back to A ', B ' through phase shifter again, promptly become the constant amplitude in-phase signal, therefore, so just realized the isolation coupling of two paths of signals also from the synthetic output of C ' end.Because signal F1 just equals the isolation at magic T C, D two ends to the isolation of F2, the isolation that signal F2 then equals magic T to the isolation of F1 adds the stopband attenuation of filter.Therefore,, be the frequency band that do not need protection between F2 and the F1 only to guarantee that two paths of signals isolates, the isolation of two passages is only determined by the requirement to the loss of F2.For example, if requiring the minimum efficiency of transmission of F2 is 95%, as long as then the stopband minimal attenuation of filter reaches 13dB.Like this, the protection bandwidth is to be the frequency bandwidth of 13dB from the filter passband edge to stopband attenuation, so boundary belt width, and the working band of antenna can make full use of.
As Fig. 4, shown in Figure 5, three mould matched feed network are formed by impedance transformer with by the isolating coupler that inductance constitutes.Shown in Fig. 6,7,8,9, antenna adopts back taper list tower structure logarithm period helical antenna, with soft drawn wire fixation or four earth anchorage method fixed antenna curtains.Three mould matched feed network and antenna belong to prior art, repeat no more.
The Signal Spacing coupler of multichannel isolating coupler is divided into 3 groups in this system, form by 2-3 Signal Spacing coupler for every group, correspondingly, every group can be complementary with 3-4 portion transmitter, the signal of multi-section transmitter is imported from the C end of Signal Spacing coupler evil spirit T respectively, multiple signals are through multichannel isolating coupler isolation coupling, by high frequency transmission line (coaxial cable) mixed high frequency signal is delivered to three mould matched feed network from the output of C ' end, further again isolation coupling, by E, F, G, H end output high-frequency signal is connected with antenna four arms successively, by antenna high-frequency signal is become electromagnetic wave and form three patterns with electromagnetic wave in all directions to space radiation.Aerial radiation is based on the elliptically polarised wave of horizontal component, so the ability of this anti-polarization fading of system is strong, can improve communication quality.
Claims (2)
1, SW multiradio share antenna isolating coupling system, comprise three mould matched feed network and antennas, it is characterized in that, it also comprises the multichannel isolating coupler, the multichannel isolating coupler is connected by high frequency transmission line with three mould matched feed network, described multichannel isolating coupler is formed by the cascade of plural Signal Spacing coupler, the Signal Spacing coupler is by two identical broadband transmission-line transformer evil spirit T, two pairs of identical all-pass network phase shifter and two identical filters are formed, and by magic T, phase shifter, filter, phase shifter, the order of evil spirit T connects in turn according to input/output relation, two pairs of phase shifters are the diagonal symmetry with respect to filter, two phase shifter Φ A of every pair of phase shifter, the phase difference of Φ B is 90 °.
2, isolating coupling system as claimed in claim 1 is characterized in that, phase shifter Φ A is made up of inductance L a1, La2, capacitor C a1, Ca2, and phase shifter Φ B is made up of inductance L b1, Lb2, capacitor C b1, Cb2, the common ends ground connection of phase shifter Φ A, Φ B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97119878 CN1091551C (en) | 1997-12-31 | 1997-12-31 | SW multiradio share antenna isolating coupling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97119878 CN1091551C (en) | 1997-12-31 | 1997-12-31 | SW multiradio share antenna isolating coupling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1222007A CN1222007A (en) | 1999-07-07 |
| CN1091551C true CN1091551C (en) | 2002-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97119878 Expired - Fee Related CN1091551C (en) | 1997-12-31 | 1997-12-31 | SW multiradio share antenna isolating coupling system |
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| Country | Link |
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| CN (1) | CN1091551C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9590733B2 (en) | 2009-07-24 | 2017-03-07 | Corning Optical Communications LLC | Location tracking using fiber optic array cables and related systems and methods |
| EP2553839A1 (en) | 2010-03-31 | 2013-02-06 | Corning Cable Systems LLC | Localization services in optical fiber-based distributed communications components and systems, and related methods |
| US8570914B2 (en) | 2010-08-09 | 2013-10-29 | Corning Cable Systems Llc | Apparatuses, systems, and methods for determining location of a mobile device(s) in a distributed antenna system(s) |
| US9781553B2 (en) | 2012-04-24 | 2017-10-03 | Corning Optical Communications LLC | Location based services in a distributed communication system, and related components and methods |
| WO2013181247A1 (en) | 2012-05-29 | 2013-12-05 | Corning Cable Systems Llc | Ultrasound-based localization of client devices with inertial navigation supplement in distributed communication systems and related devices and methods |
| US9158864B2 (en) | 2012-12-21 | 2015-10-13 | Corning Optical Communications Wireless Ltd | Systems, methods, and devices for documenting a location of installed equipment |
| CN104702267A (en) * | 2015-03-21 | 2015-06-10 | 徐园园 | Adjustable hybrid coupler circuit |
| US9648580B1 (en) | 2016-03-23 | 2017-05-09 | Corning Optical Communications Wireless Ltd | Identifying remote units in a wireless distribution system (WDS) based on assigned unique temporal delay patterns |
| CN111030625B (en) * | 2019-12-30 | 2023-08-01 | 广州海格通信集团股份有限公司 | Self-adaptive multi-element orthogonal wave trap and wave trapping method thereof |
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1997
- 1997-12-31 CN CN 97119878 patent/CN1091551C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1222007A (en) | 1999-07-07 |
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