CN103296488A - Feed network device, antenna feed system and base station - Google Patents
Feed network device, antenna feed system and base station Download PDFInfo
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- CN103296488A CN103296488A CN2013102095622A CN201310209562A CN103296488A CN 103296488 A CN103296488 A CN 103296488A CN 2013102095622 A CN2013102095622 A CN 2013102095622A CN 201310209562 A CN201310209562 A CN 201310209562A CN 103296488 A CN103296488 A CN 103296488A
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Abstract
The invention discloses a feed network device, an antenna feed system and a base station. The feed network device comprises a first capacitor, a protective device, a first quarter guide wavelength transmission line and a second capacitor, one end of the first capacitor is connected with one end of the first quarter guide wavelength transmission line to serve as a public signal end, the guide wavelength is a signal wavelength of application bandwidth center frequency of the feed network device, the other end of the first capacitor is used as a radio frequency signal end, the other end of the first quarter guide wavelength transmission line is connected with one end of the second capacitor and one end of the protective device to serve as a direct-current/low-frequency signal end, and the other end of the second capacitor and the other end of the protective device are grounded. By the scheme, the bandwidth of the feed network device can be broadened.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of feeding network device, antenna-feedback system and base station.
Background technology
Base station in the mobile communications network sends and received RF signal, all needs to be undertaken by antenna-feedback system.And between base station and antenna-feedback system in the mutual signal except comprising radiofrequency signal, also comprise the low frequency signal that direct current signals such as power supply signal, control signal or frequency are lower than assigned frequency.Feeding network device just is mainly used in carrying out separating and merging of radiofrequency signal and direct current/low frequency signal, and this device both can be arranged in the antenna-feedback system, also can be arranged in the base station.
Feeding network device of the prior art as shown in Figure 1, comprise capacitance C1, grip high-frequency inductor L1 and protective device G1, the end of capacitance C1 links to each other with an end of gripping high-frequency inductor L1, as common signal end Vco, the other end of this capacitance C1 is as radiofrequency signal end Vrf, this grips the other end of high-frequency inductor L1 and the end of protective device G1 links to each other, as direct current/low frequency signal end Vd, the other end ground connection of protective device G1.Wherein, protective device G1 is specifically as follows lightning protection components commonly used such as gas discharge tube.When feeding network device is arranged in antenna-feedback system, the common signal end Vco of feeding network device is signal input part, radiofrequency signal end Vrf and direct current/low frequency signal end Vd is signal output part, and feeding network device is separated output with the radiofrequency signal in the signal of common signal end Vco input with direct current/low frequency signal; When feeding network device is arranged in the base station, the radiofrequency signal end Vrf of feeding network device and direct current/low frequency signal end Vd is signal input part, common signal end Vco is signal output part, and feeding network device merges output with the radiofrequency signal of radiofrequency signal end Vrf input and the direct current/low frequency signal of direct current/low frequency signal end Vd input.
And along with the developing rapidly of science and technology, the application that a plurality of mobile communications networks share the base station more and more widely more and more is subjected to the favor of operator.Because the frequency difference of different mobile communication network, a plurality of mobile communications networks share the application of base station and then require the bandwidth of the feeding network device in the antenna-feedback system should be wide as far as possible.Feeding network device of the prior art, in order to guarantee lightning protection properties, can adopt inductance value bigger grip high-frequency inductor, yet because bigger the gripping high-frequency inductor and when radiofrequency signal is imported, can have bigger parasitic parameter of inductance value, as parasitic capacitance, make that the standing-wave ratio of feeding network device is bigger, cause the bandwidth of feeding network device under the situation that the user has relatively high expectations to standing-wave ratio narrower, be difficult to satisfy the demand that a plurality of mobile communications networks share the base station.
Summary of the invention
The embodiment of the invention provides a kind of feeding network device, antenna-feedback system and base station, in order to expand the bandwidth of feeding network device.
First aspect provides a kind of feeding network device, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
In conjunction with first aspect, in first kind of possible implementation, described feeding network device also comprises at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
Second aspect provides a kind of antenna-feedback system, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
In conjunction with second aspect, in first kind of possible implementation, described antenna-feedback system also comprises at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
The third aspect provides a kind of base station, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
In conjunction with the third aspect, in first kind of possible implementation, described base station also comprises at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
The feeding network device that provides according to first aspect, the base station that the antenna-feedback system that second aspect provides or the third aspect provide, adopt 1/4th guide wavelength transmission lines to replace gripping high-frequency inductor, when radiofrequency signal is imported, the end of 1/4th guide wavelength transmission lines is by the second capacity earth short circuit, voltage is zero, and through 1/4th guide wavelengths, the voltage of the end that this transmission line links to each other with first electric capacity is bigger, be in about voltage peak, the branch road that comprises this 1/4th guide wavelengths transmission line is equivalent to open circuit, makes the standing-wave ratio of feeding network device more close to 1, can expand the bandwidth of feeding network device.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with the embodiment of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is feeding network device schematic diagram of the prior art;
The feeding network device schematic diagram that Fig. 2 provides for the embodiment of the invention;
One of feeding network device schematic diagram that Fig. 3 provides for the embodiment of the invention 1;
Two of the feeding network device schematic diagram that Fig. 4 provides for the embodiment of the invention 1.
Embodiment
In order to provide the implementation of the bandwidth of expanding feeding network device, the embodiment of the invention provides a kind of feeding network device, below in conjunction with Figure of description the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein only is used for description and interpretation the present invention, and is not used in restriction the present invention.And under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The embodiment of the invention provides a kind of feeding network device, as shown in Figure 2, comprises first capacitor C 1, protective device G1, the 1/1st guide wavelength transmission line M1 and second capacitor C 2, wherein:
One end of first capacitor C 1 links to each other with the end of the 1/1st guide wavelength transmission line M1, as common signal end Vco; The other end of first capacitor C 2 is as radiofrequency signal end Vrf; One end of the other end of the 1/1st guide wavelength transmission line M1 and second capacitor C 2, the end of protective device G1 link to each other, as direct current/low frequency signal end Vd; The other end ground connection of the other end of second capacitor C 2 and protective device G1.
Wherein, first capacitor C 1 namely is equivalent to capacitance of the prior art.
Guide wavelength is the signal wavelength of feeding network device application bandwidth centre frequency.
If only a network uses this feeding network device, this feeding network device application bandwidth is this network frequency range; For example, only the GSM network uses this feeding network device, and the frequency range of GSM network is 1710MHz-1880MHz, and then this feeding network device application bandwidth is 1710MHz-1880MHz, and centre frequency is 1795MHz.
If a plurality of networks use this feeding network device jointly, the feeding network device application bandwidth is the scope that minimum frequency and peak frequency constitute in these a plurality of network frequency ranges; For example, GSM network and WCDMA network share this feeding network device, and the frequency range of GSM network is 1710MHz-1880MHz, and the frequency range of WCDMA network is 1920MHz-2170MHz, then this feeding network device application bandwidth is 1710MHz-2170MHz, and centre frequency is 1940MHz.
Determining of the signal wavelength of centre frequency, namely guide wavelength determine specifically also to consider parameter such as dielectric constant, this part is prior art, no longer further sets forth inferior.
Further, this feeding network device can also comprise at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that first capacitor C 1 links to each other with the 1/1st guide wavelength transmission line M1, an end that connects each the 1/2nd guide wavelength transmission line, the other end of this each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
Below in conjunction with accompanying drawing, with specific embodiment above-mentioned feeding network device provided by the invention is elaborated.
Embodiment 1:
Figure 3 shows that the feeding network device that the embodiment of the invention 1 provides, comprise first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, gas discharge tube G1, the 1/1st guide wavelength transmission line M1 and the 1/2nd guide wavelength transmission line M2, wherein:
One end of first capacitor C 1 links to each other with the end of the 1/1st guide wavelength transmission line M1, the end of the 1/2nd guide wavelength transmission line M2, as common signal end Vco; The other end of first capacitor C 2 is as radiofrequency signal end Vrf; One end of the other end of the 1/1st guide wavelength transmission line M1 and second capacitor C 2, the end of gas discharge tube G1 link to each other, as direct current/low frequency signal end Vd; The other end ground connection of the other end of second capacitor C 2 and gas discharge tube G1; The other end of the 1/2nd guide wavelength transmission line M2 is by the 3rd capacitor C 3 ground connection.
In the feeding network device that the embodiment of the invention 1 provides, adopt the 1/1st guide wavelength transmission line M1 to replace the high-frequency inductor of gripping of the prior art, be to grip high-frequency inductor L1 among Fig. 1, and, the 1/1st guide wavelength transmission line M1 is terminal by second capacitor C, 2 ground connection, when radiofrequency signal is imported, be equivalent to the terminal ground connection of the 1/1st guide wavelength transmission line M1, voltage is zero, through 1/4th guide wavelengths, the voltage of the 1/1st guide wavelength transmission line M1 other end is bigger, is in about voltage peak, and the branch road that namely comprises the 1/1st guide wavelength transmission line M1 and second capacitor C 2 is equivalent to open circuit, make the standing-wave ratio of feeding network device more close to 1, can expand the bandwidth of feeding network device, and can reduce to insert loss, improve the signal isolation.
In like manner, the branch road that is made of the 1/2nd guide wavelength transmission line M2 and the 3rd capacitor C 3 also is equivalent to open circuit, can further expand bandwidth.
Namely for radiofrequency signal, the branch road that comprises 1/4th guide wavelength transmission lines and ground capacity is equivalent to open circuit, so direct current/low frequency signal can transmit by circuit between common signal end Vco and direct current/low frequency signal end Vd.
And for direct current/low frequency signal, the branch road that comprises electric capacity is equivalent to open circuit, so radiofrequency signal can be transmitted by circuit between common signal end Vco and radiofrequency signal end Vrf.
As seen, the feeding network device that has adopted the embodiment of the invention 1 to provide can be expanded the bandwidth of feeding network device, reduces to insert loss, improves the signal isolation.
In other embodiments of the invention, this feeding network device can also comprise two or more the 1/2nd guide wavelength transmission line M2, and two or more the 3rd capacitor C 3.The feeding network device structure chart that comprises two the 1/2nd guide wavelength transmission line M2 and two the 3rd capacitor C 3 that is shown in Figure 4, the end that first capacitor C 1 links to each other with the 1/1st guide wavelength transmission line M1, an end that connects each the 1/2nd guide wavelength transmission line M2, the other end of two the 1/2nd guide wavelength transmission line M2 is respectively by the 3rd capacitor C 3 ground connection, be that each the 1/2nd guide wavelength transmission line M2 and the 3rd capacitor C 3 constitute a branch road ground connection, can further expand for bandwidth.
Embodiment 2:
The embodiment of the invention 2 also provides a kind of antenna-feedback system, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of this first electric capacity links to each other with an end of the 1/1st guide wavelength transmission line, as the common signal end; The other end of this first electric capacity is as the radiofrequency signal end; One end of the other end of the 1/1st guide wavelength transmission line and this second electric capacity, an end of this protective device link to each other, as direct current/low frequency signal end; The other end ground connection of the other end of this second electric capacity and this protective device.
Further, this antenna-feedback system also comprises at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that this first electric capacity links to each other with the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of this each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
Embodiment 3:
The embodiment of the invention 3 also provides a kind of base station, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of this first electric capacity links to each other with an end of the 1/1st guide wavelength transmission line, as the common signal end; The other end of this first electric capacity is as the radiofrequency signal end; One end of the other end of the 1/1st guide wavelength transmission line and this second electric capacity, an end of this protective device link to each other, as direct current/low frequency signal end; The other end ground connection of the other end of this second electric capacity and this protective device.
Further, this base station also comprises at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that this first electric capacity links to each other with the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of this each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
In sum, the feeding network device that the embodiment of the invention provides, comprise first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein: an end of this first electric capacity links to each other with an end of the 1/1st guide wavelength transmission line, as the common signal end; This guide wavelength is the signal wavelength of this feeding network device application bandwidth centre frequency; The other end of this first electric capacity is as the radiofrequency signal end; One end of the other end of the 1/1st guide wavelength transmission line and this second electric capacity, an end of this protective device link to each other, as direct current/low frequency signal end; The other end ground connection of the other end of this second electric capacity and this protective device.The scheme that adopts the embodiment of the invention to provide can be expanded the bandwidth of feeding network device.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (6)
1. a feeding network device is characterized in that, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
2. feeding network device as claimed in claim 1, it is characterized in that, also comprise at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
3. an antenna-feedback system is characterized in that, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
4. antenna-feedback system as claimed in claim 3, it is characterized in that, also comprise at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
5. a base station is characterized in that, comprises first electric capacity, protective device, the 1/1st guide wavelength transmission line and second electric capacity, wherein:
One end of described first electric capacity links to each other with an end of described the 1/1st guide wavelength transmission line, as the common signal end; Described guide wavelength is the signal wavelength of described feeding network device application bandwidth centre frequency;
The other end of described first electric capacity is as the radiofrequency signal end;
One end of the other end of described the 1/1st guide wavelength transmission line and an end of described second electric capacity, described protective device links to each other, as direct current/low frequency signal end;
The other end ground connection of the other end of described second electric capacity and described protective device.
6. base station as claimed in claim 5, it is characterized in that, also comprise at least one the 1/2nd guide wavelength transmission line and at least one the 3rd electric capacity, the end that described first electric capacity links to each other with described the 1/1st guide wavelength transmission line, an end that connects each the 1/2nd guide wavelength transmission line, the other end of described each the 1/2nd guide wavelength transmission line are respectively by the 3rd capacity earth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209562.2A CN103296488B (en) | 2013-05-30 | 2013-05-30 | Feed network device, antenna feed system and base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310209562.2A CN103296488B (en) | 2013-05-30 | 2013-05-30 | Feed network device, antenna feed system and base station |
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| CN103296488A true CN103296488A (en) | 2013-09-11 |
| CN103296488B CN103296488B (en) | 2015-05-27 |
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| CN201310209562.2A Active CN103296488B (en) | 2013-05-30 | 2013-05-30 | Feed network device, antenna feed system and base station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919883A (en) * | 2017-11-13 | 2018-04-17 | 青岛海信移动通信技术股份有限公司 | A kind of antenna assembly and mobile unit applied to mobile unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222080C (en) * | 1999-08-11 | 2005-10-05 | Amc森托瑞恩股份公司 | Small multiple band antenna |
| CN101699767A (en) * | 2009-10-21 | 2010-04-28 | 上海华为技术有限公司 | Feed circuit of radio frequency power amplifier |
-
2013
- 2013-05-30 CN CN201310209562.2A patent/CN103296488B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222080C (en) * | 1999-08-11 | 2005-10-05 | Amc森托瑞恩股份公司 | Small multiple band antenna |
| CN101699767A (en) * | 2009-10-21 | 2010-04-28 | 上海华为技术有限公司 | Feed circuit of radio frequency power amplifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107919883A (en) * | 2017-11-13 | 2018-04-17 | 青岛海信移动通信技术股份有限公司 | A kind of antenna assembly and mobile unit applied to mobile unit |
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| CN103296488B (en) | 2015-05-27 |
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