CN1983882B - Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio - Google Patents
Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio Download PDFInfo
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- CN1983882B CN1983882B CN2006100758128A CN200610075812A CN1983882B CN 1983882 B CN1983882 B CN 1983882B CN 2006100758128 A CN2006100758128 A CN 2006100758128A CN 200610075812 A CN200610075812 A CN 200610075812A CN 1983882 B CN1983882 B CN 1983882B
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Abstract
The invention is concerned with the base station radio frequency anterior extremity, including: the channel with power, the channel without power, the base station radio frequency anterior extremity includes: the crossing channel directional coupler uses to coupling the part of forward-direction power of the channel with power to the channel without channel, one end is located at the forward-direction power transmission line side of the channel with power, another end connects with the forward-direction power outputting interface of the channel without power. The invention is also concerned with the system and method that uses the base station radio frequency anterior extremity to measure feed voltage standing wave ratio. The invention can achieve the measurement for the corresponding feed VSWR of the channel without forward direction power input; it is small affect with the covering performance of the base station of the channel with power, will not affect the normal work of the channel with power.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of base station radio-frequency front end, and utilize this base station radio-frequency to measure the system and method for base station antenna feeder voltage standing wave ratio (VSWR, Voltage Standing Wave Ratio).
Background technology
VSWR is the important performance indexes of mobile communication base station system antenna feeder part.In order to measure the VSWR of antenna feeder, need to measure the forward power and the backward power of antenna feeder.The system of a typical measurement antenna feeder VSWR as shown in Figure 1.
This system is divided into the two large divisions: base station radio-frequency front end and measurement plate.The base station radio-frequency front end has a duplex channel that transmitting-receiving is public, when the base station radio-frequency front end is worked, transmits through low pass filter and duplexer, outputs to the antenna feeder interface, and base station antenna feeder is gone in the stepping of going forward side by side.From transmitting except outputing to the antenna feeder interface of duplexer output, also be coupled to forward power and measure interface, and be further used as forward power and output to the measurement plate by first directional coupler.Enter transmitting of base station antenna feeder through the antenna feeder interface and reflect in antenna feeder, reflected signal enters the base station radio-frequency front end from the antenna feeder interface.The part of reflected signal is coupled to backward power by second directional coupler measures interface, and is further used as backward power and outputs to the measurement plate, and another part is by the filtering of duplexer institute.Measure the measurement module of plate and measure forward power and backward power respectively; Calculate the VSWR of antenna feeder then in conjunction with the degree of coupling of first directional coupler and second directional coupler by computing module; At last result of calculation is passed through output module output as a result.
As mentioned above,, need the passage of antenna feeder correspondence that the forward power of input is arranged, in antenna feeder, reflect the generation backward power by the forward power of input in order to measure the VSWR of antenna feeder, then could be according to forward and reverse power calculation VSWR.But in actual applications, the passage of antenna feeder correspondence does not always have the forward power input.For example, as shown in Figure 2, the base station radio-frequency front end has two duplex channels, but have only one of them to come into operation, that is to say to have only one of them duplex channel that the forward power of input is arranged, so just can't carry out VSWR to the antenna feeder of another duplex channel correspondence and measure.Again such as, as shown in Figure 3, the base station radio-frequency front end has a duplex channel and a diversity reception passage, transmits as the input forward power of duplex channel, but the diversity reception passage does not have the forward power input, therefore can't carry out VSWR to the antenna feeder of diversity reception passage correspondence yet and measure.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of base station radio-frequency front end and utilizes this base station radio-frequency front end to measure the system and method for base station antenna feeder VSWR that the pairing antenna feeder of passage that no forward power in the base station radio-frequency front end is imported also can carry out the measurement of VSWR.
In order to achieve the above object, the invention provides a kind of base station radio-frequency front end, include power channels, inactivity passage, it is characterized in that, this base station radio-frequency front end further comprises:
Stride the passage directional coupler, a part that is used for to the power channels forward power to be arranged is coupled to the inactivity passage, and the one end is positioned to be had by the forward power of the power channels transmission line, and the other end is connected to the forward power input interface of inactivity passage;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
Wherein, described have power channels to comprise first duplexer and the first antenna feeder interface, and described have the forward power transmission line of power channels to be:
Be connected to the transmission line of the emission interface of first duplexer;
Or
First duplexer close transmission line between the terminal and the first antenna feeder interface.
Wherein, described inactivity passage comprises second duplexer and the second antenna feeder interface, and a described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to the emission interface of second duplexer.
Wherein, described inactivity passage comprises the receiving filter and the second antenna feeder interface, and this base station radio-frequency front end further comprises:
Emission filter, passband are the transmit frequency band of base station system, and the one end is connected to strides the passage directional coupler, and the other end is connected to the second antenna feeder interface;
A described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to emission filter.
Wherein, the described passage coupler of striding is the 10dB coupler.
In order to achieve the above object, the present invention also provides a kind of system of measuring the base station antenna feeder voltage standing wave ratio, comprise base station radio-frequency front end and voltage standing wave ratio measurement plate, wherein the base station radio-frequency front end includes power channels, inactivity passage, the first measurement passage corresponding with power channels is arranged, the second measurement passage corresponding with the inactivity passage, voltage standing wave ratio is measured plate and first and is measured passage, and/or second measures passage links to each other, it is characterized in that described base station radio-frequency front end further comprises:
Stride the passage directional coupler, be used for having the part of power channels forward power to be coupled to the inactivity passage base station radio-frequency front end, the one end is positioned to be had by the forward power of the power channels transmission line, and the other end is connected to the forward power input interface of inactivity passage;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
Wherein, the power channels that has of described base station radio-frequency front end comprises first duplexer and the first antenna feeder interface, and described have the forward power transmission line of power channels to be:
Be connected to the transmission line of the emission interface of first duplexer;
Or
First duplexer close transmission line between the terminal and the first antenna feeder interface.
Wherein, described inactivity passage comprises second duplexer and the second antenna feeder interface, and a described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to the emission interface of second duplexer.
Wherein, described inactivity passage comprises the receiving filter and the second antenna feeder interface, and described base station radio-frequency front end further comprises:
Emission filter, passband are the transmit frequency band of base station system, and the one end is connected to strides the passage directional coupler, and the other end is connected to the second antenna feeder interface;
A described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to emission filter.
In order to achieve the above object, the present invention also provides a kind of method of measuring the base station antenna feeder voltage standing wave ratio, it is characterized in that, this method comprises:
A, the base station there is the part in the forward signal of power channels, is coupled to base station inactivity passage as coupled signal;
B, the forward power that the part of coupled signal is coupled to the inactivity passage are measured interface, and another part outputs in the antenna feeder of inactivity passage;
C, receive the reflected signal of described antenna feeder, the backward power that the part of reflected signal is coupled to the inactivity passage is measured interface, and another part absorbs with filter;
D, measure interface and backward power is measured the interface measured signal power, obtain forward power and backward power in described forward power;
E, according to resulting forward power and backward power among the step D, calculate the voltage standing wave ratio of inactivity passage antenna feeder;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
Wherein, steps A is described is coupled to base station inactivity passage with coupled signal and is:
A1, coupled signal is carried out the bandpass filtering that passband is the base station frequency range;
A2, filtered signal is outputed to base station inactivity passage.
Wherein, steps A is described to have the base station a part in the forward signal of power channels, is coupled to base station inactivity passage as coupled signal and is:
The base station is had power channels forward signal power 1/10th, be coupled to base station inactivity passage as coupled signal.
Wherein, between step D and step e, further comprise:
Degree of coupling correction forward power when measuring interface with the forward power that among the step B part of coupled signal is coupled to the inactivity passage, the degree of coupling correction backward power during with the backward power measurement interface that among the step C part of reflected signal is coupled to the inactivity passage.
Adopt technical scheme provided by the present invention, with directional coupler having in the power channels of forward power input arranged from the base station radio-frequency front end, a part of forward power is coupled to the inactivity passage that does not have the forward power input in the base station radio-frequency front end, as the forward power of the VSWR that measures the corresponding antenna feeder of inactivity passage institute, thus realized for the passage that does not have forward power to import the measurement of VSWR of corresponding antenna feeder.Meanwhile, very little to the influence of base station covering performance that power channels is arranged, do not influence the operate as normal that power channels is arranged.
Description of drawings
Fig. 1 is the block diagram of typical base station antenna feeder VSWR measuring system;
Fig. 2 is the block diagram that has the base station radio-frequency front end of two duplex channels;
Fig. 3 is the block diagram that has the base station radio-frequency front end of a duplex channel and a diversity reception passage;
Fig. 4 is the block diagram of base station radio-frequency front end embodiment one provided by the invention;
Fig. 5 is the block diagram of base station radio-frequency front end embodiment two provided by the invention;
Fig. 6 is the block diagram of base station radio-frequency front end embodiment three provided by the invention;
Fig. 7 is the block diagram of base station radio-frequency front end embodiment four provided by the invention;
Fig. 8 adopts the influence that under X poliarizing antenna situation the base station is covered after the technical scheme of the present invention;
Fig. 9 adopts the influence that under the vertical polarized antenna situation base station is covered after the technical scheme of the present invention;
Figure 10 is the method flow diagram of measurement antenna feeder VSWR provided by the invention.
Embodiment
Core concept of the present invention is: in the base station radio-frequency front end, utilize directional coupler, a part of forward power in the passage of importing forward power will be arranged, be coupled to conduct input forward power in the passage of not importing forward power, thereby realize that the pairing antenna feeder of the passage of not importing forward power is carried out VSWR to be measured.
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Please refer to Fig. 4, Fig. 4 is the block diagram of base station radio-frequency front end embodiment one provided by the invention.
Present embodiment at be situation shown in Figure 2, the base station radio-frequency front end has two duplex channels.Wherein, first low pass filter, second low pass filter, first duplexer and the first antenna feeder interface have constituted first duplex channel, and first directional coupler, second directional coupler, first backward power measure interface and first forward power is measured the interface formation first measurement passage corresponding with first duplex channel; The 3rd low pass filter, the 4th low pass filter, second duplexer and the second antenna feeder interface have constituted second duplex channel, and the 3rd directional coupler, the 4th directional coupler, second backward power measure interface and second forward power is measured the interface formation second measurement passage corresponding with second duplex channel.
Transmitting through first low pass filter and first duplexer among the figure enters the pairing antenna feeder of first duplex channel from the first antenna feeder interface.The effect of duplexer is to realize received signal and the channels share that transmits, and it is divided into closes terminal and branch terminal, and wherein closing terminal has an interface, and the branch terminal has two interfaces at least.Two interfaces of duplexer branch terminal connect the received signal passage respectively and the passage that transmits, and are called receiving interface and emission interface; The interface that closes terminal connects the transmit-receive sharing passage.The effect of low pass filter is the high order harmonic component in the filtered signal, to improve systematic function.From transmitting except outputing to the antenna feeder interface of first duplexer output, also be coupled to first forward power and measure interface by first directional coupler.Enter transmitting of the pairing antenna feeder of first duplex channel through the first antenna feeder interface and reflect in antenna feeder, reflected signal enters the base station radio-frequency front end from the first antenna feeder interface.The part of reflected signal is coupled to first backward power by second directional coupler measures interface, and another part is by the filtering of first duplexer institute.
Need to prove, enter the base station radio-frequency front end, except reflected signal, also have received signal from the first antenna feeder interface.But with respect to reflected signal, the intensity of received signal is very little, and is little of ignoring.In general, the magnitude of transmit signal power be 10dBm to 100dBm, then the magnitude of reflection signal power also for 10dBm to 100dBm, and the magnitude of received signal power is-100dBm.
The 5th directional coupler is positioned at the end of first low pass filter away from the first antenna feeder interface, its role is to, the part that transmits of first duplex channel is coupled out, output in second duplex channel the 3rd low pass filter, as the input power of second duplex channel as the forward power input interface.As a kind of replacement scheme, the 5th directional coupler can place between first duplexer and the first antenna feeder interface, as shown in Figure 5.
First low pass filter is away from the transmission line at the first antenna feeder interface, one end place, and the transmission line between first duplexer and the first antenna feeder interface, and the forward power transmission is all arranged.Therefore, no matter be to be positioned at position shown in Figure 4, still be positioned at position shown in Figure 5, the 5th directional coupler can be regarded as by the forward power transmission line that is positioned at first duplex channel that forward power is arranged.Because the 5th directional coupler has realized striding the power coupling of passage, therefore the 5th directional coupler can be called and stride the passage directional coupler.
For second duplex channel, as forward power,, enter the pairing antenna feeder of second duplex channel from the second antenna feeder interface through the 3rd low pass filter and second duplexer with the output of the 5th directional coupler., except outputing to the second antenna feeder interface, also be coupled to second forward power and measure interface from the forward power signal of second duplexer output by the 3rd directional coupler.Enter transmitting of the pairing antenna feeder of second duplex channel through the second antenna feeder interface and reflect in antenna feeder, reflected signal enters the base station radio-frequency front end from the second antenna feeder interface.The part of reflected signal is coupled to second backward power by the 4th directional coupler measures interface, and another part is by the filtering of second duplexer institute.
A coupling part can weaken the emissivities of first duplex channel to second duplex channel from the transmitting of first duplex channel; Simultaneously, be coupled to the signal of second duplex channel by the 5th directional coupler, finally can launch by the antenna feeder of the second duplex channel correspondence, the stack of signal that the antenna feeder corresponding with first duplex channel launched, thus the signal that the antenna feeder of the first duplex channel correspondence is launched spatially influenced.Therefore, the degree of coupling of the 5th directional coupler can not be too little.But, if the degree of coupling of the 5th directional coupler is excessive, can make that the forward power of input second duplex channel is too little, to such an extent as to influence is to the VSWR measurement of the corresponding antenna feeder of second duplex channel.
Take all factors into consideration above factor, the degree of coupling of the 5th directional coupler can be got 10dB, is equivalent to 1/10th of transmit signal power and is coupled to the 3rd low pass filter by first directional coupler.Adopt aforesaid value, if transmit signal power is 45dBm, to be coupled to the signal power of the 3rd low pass filter be 35dBm to the 5th directional coupler so, and the signal power that outputs to the first antenna feeder interface is about 44.5dBm.
Please refer to Fig. 6, Fig. 6 is the block diagram of base station radio-frequency front end embodiment three provided by the invention.
Present embodiment at be situation shown in Figure 3, the base station radio-frequency front end has a duplex channel and a diversity reception passage.Wherein, first low pass filter, second low pass filter, duplexer and the first antenna feeder interface have constituted duplex channel, and first directional coupler, second directional coupler, first backward power measure interface and first forward power is measured the interface formation first measurement passage corresponding with duplex channel; The 5th low pass filter, receiving filter and the second antenna feeder interface have constituted the diversity reception passage, and the 3rd directional coupler, the 4th directional coupler, second backward power measure interface and second forward power is measured the interface formation second measurement passage corresponding with the diversity reception passage.Wherein, receiving filter is a band pass filter, and its passband is the reception frequency range of base station.
In order to allow the diversity reception passage can accept forward power, the receiving filter of diversity reception passage need be repacked into easy duplexer.Concrete grammar is that the signal that the 5th directional coupler is coupled out is imported an emission filter earlier, and the other end with emission filter also is linked into the second antenna feeder interface then.Emission filter also is a band pass filter, and its passband is the transmit frequency band of base station.
The 5th directional coupler is positioned at the end of first low pass filter away from the first antenna feeder interface, its role is to, and the part that transmits of first duplex channel is coupled out, and the output emission filter is as the input power of decomposing receive path.As a kind of replacement scheme, the 5th directional coupler can place between first duplexer and the first antenna feeder interface, as shown in Figure 7.
For second duplex channel, as forward power,, enter the pairing antenna feeder of second duplex channel from the second antenna feeder interface through emission filter with the output of the 5th directional coupler.From transmitting except outputing to the second antenna feeder interface of second duplexer output, also be coupled to second forward power and measure interface by the 3rd directional coupler.Enter transmitting of the pairing antenna feeder of diversity reception passage through the second antenna feeder interface and reflect in antenna feeder, reflected signal enters the base station radio-frequency front end from the second antenna feeder interface.The part of reflected signal is coupled to second backward power by the 4th directional coupler measures interface, and another part is received the filtering of filter institute.
Be coupled to the signal of diversity reception passage by the 5th directional coupler, finally can launch by the antenna feeder of diversity reception passage correspondence, the stack of signal that the antenna feeder corresponding with duplex channel launched, thus the signal that the antenna feeder of duplex channel correspondence is launched spatially influenced.
Fig. 4 is to base station radio-frequency front end shown in Figure 7, the forward power measurement interface and the backward power of antenna feeder respective channel to be measured are measured the measurement module that interface is connected respectively to the measurement plate, just can form the system of measuring base station antenna feeder VSWR, treat the capable measurement of observation feed.
As previously mentioned, if the degree of coupling of the 5th directional coupler is 10dB, transmit signal power is 45dBm, and the signal power that outputs to the first antenna feeder interface so is about 44.5dBm, and the signal power that is coupled to second duplex channel or diversity reception passage by the 5th directional coupler is 35dBm.In this case, by emulation, if all passages all adopt the X poliarizing antenna, the influence that signal stack covers the base station as shown in Figure 8; If all passages all adopt vertical polarized antenna, the influence that signal stack covers the base station as shown in Figure 9.
Fig. 8 (a) is the schematic diagram that the base station covers when not having the signal stack, Fig. 8 (b) is the schematic diagram that signal when stack base station of 180 ° of two phase differences covers, Fig. 8 (c) is the schematic diagram that signal when stack base station of 135 ° of two phase differences covers, Fig. 8 (d) is the schematic diagram that signal when stack base station of 90 ° of two phase differences covers, Fig. 8 (e) is the schematic diagram that signal when stack base station of 45 ° of two phase differences covers, the schematic diagram that the base station covered when Fig. 8 (f) was the signal stack of 0 ° of two phase difference.Two signals here are exactly respectively the signal that the antenna of first duplex channel and second duplex channel is launched, or the signal launched of the antenna of duplex channel and diversity reception passage.The power of two signals is respectively 35dBm and 44.5dBm.Under actual conditions, two phase difference between signals are at random, have only got some values to explain the situation when emulation.
As can be seen from Figure 8, the signal stack can be ignored to the influence that the base station covers.
Among Fig. 9, the curve of smoother is the schematic diagram that does not have signal when stack base station to cover, and relatively more tortuous curve is the schematic diagram that base station, signal stack back that two power are respectively 35dBm and 44.5dBm covers.As can be seen, signal stack influence that the base station is covered mainly is the influence to smoothness.Smoothness also depends on two distances between the antenna except the relative power size of two signals depending on stack, when obtaining simulation result shown in Figure 9, supposes that antenna distance is 10 times of wavelength.As can be seen, in this case, the signal stack also is very little to the influence of base station range.
Please refer to Figure 10, Figure 10 is the method flow diagram of measurement antenna feeder VSWR provided by the invention, and this method comprises:
Step 101: the part in the forward signal of power channels will be arranged,, be coupled to the inactivity passage as coupled signal.
In order to make power channels after the part of forward signal is coupled to the inactivity passage, still can operate as normal, should only will the sub-fraction of power channels forward signal be arranged, for example 1/10th be coupled to the inactivity passage.
If the inactivity passage is the diversity reception passage of base station, need so coupled signal to be input to the inactivity passage again through after passband is the band pass filter of base station frequency range.
Step 102: the forward power that the part of coupled signal is coupled to the inactivity passage is measured interface, and another part outputs in the antenna feeder of inactivity passage.
Step 103: receive the reflected signal of inactivity passage antenna feeder, the backward power that the part of antenna feeder reflected signal is coupled to the inactivity passage is measured interface, and another part absorbs with filter.
Said herein filter is a band pass filter, and its passband is the reception frequency range of base station system.Owing to there is the frequency spectrum of the forward signal of power channels to be positioned at the transmit frequency band of base station system, thereby the frequency spectrum of the frequency spectrum of coupled signal and antenna feeder reflected signal all is positioned at the transmit frequency band of base station system, and the part that is not coupled to backward power measurement interface like this in the reflected signal just can absorb by filtered device.
Step 104: measure the power that forward power is measured interface and backward power measurement interface respectively.
Step 105: calculate antenna feeder VSWR according to measurement result.
When calculating antenna feeder VSWR, need at first calculate the reflection loss RL of antenna feeder.Measure the ratio that the signal power of interface accounts for coupled signal power if be coupled to the forward power of inactivity passage in the step 102, the ratio that accounts for reflection signal power with the signal power of the backward power measurement interface that is coupled to the inactivity passage in the step 103 is identical, suppose that the forward power that measures at forward power measurement interface is P1, the backward power that measures at backward power measurement interface is P2, the reflection loss of antenna feeder is RL, and following relation is then arranged between forward power P1, backward power P2, the antenna feeder reflection loss RL:
|RL|＝|P2-P1|
If aforementioned proportion is unequal, so before calculating reflection loss RL, need with in step 102 and the step 103 during coupled signal the degree of coupling antenna feeder reflection loss RL that above-mentioned formula calculates is revised.The degree of coupling when supposing coupled signal in the step 102 is C1, the degree of coupling in the step 103 during coupled signal is C2, the forward power that measures at forward power measurement interface is P1, and the backward power that measures at backward power measurement interface is P2, and revised forward power is:
P1′＝P1+|C1|
Revised backward power is:
P2′＝P2+|C2|
The reflection loss RL of antenna feeder is:
| RL|P1 '-P2 ' |=| (P1+|C1|)-(P2+|C2|) | wherein, the unit of power is dBm, and the degree of coupling represents that with dB reflection loss is represented with dB.And the voltage reflection coefficient Γ of antenna feeder can be obtained by antenna feeder reflection loss RL:
|Γ|＝10
-|RL|/20
That is to say, the absolute value of Γ be one greater than 0 smaller or equal to 1 positive number.
At last, the VSWR of antenna feeder is obtained by the voltage reflection coefficient of antenna feeder:
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a base station radio-frequency front end includes power channels, inactivity passage, it is characterized in that, this base station radio-frequency front end further comprises:
Stride the passage directional coupler, a part that is used for to the power channels forward power to be arranged is coupled to the inactivity passage, and the one end is positioned to be had by the forward power of the power channels transmission line, and the other end is connected to the forward power input interface of inactivity passage;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
2. base station radio-frequency front end according to claim 1, described have power channels to comprise first duplexer and the first antenna feeder interface, it is characterized in that, and described have the forward power transmission line of power channels to be:
Be connected to the transmission line of the emission interface of first duplexer;
Or
First duplexer close transmission line between the terminal and the first antenna feeder interface.
3. base station radio-frequency front end according to claim 1 and 2, it is characterized in that, described inactivity passage comprises second duplexer and the second antenna feeder interface, a described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to the emission interface of second duplexer.
4. base station radio-frequency front end according to claim 1 and 2 is characterized in that, described inactivity passage comprises the receiving filter and the second antenna feeder interface, and this base station radio-frequency front end further comprises:
Emission filter, passband are the transmit frequency band of base station system, and the one end is connected to strides the passage directional coupler, and the other end is connected to the second antenna feeder interface;
A described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to emission filter.
5. the device of measurement base station antenna feeder voltage standing wave ratio according to claim 1 is characterized in that, the described passage coupler of striding is the 10dB coupler.
6. system of measuring the base station antenna feeder voltage standing wave ratio, comprise base station radio-frequency front end and voltage standing wave ratio measurement plate, wherein the base station radio-frequency front end includes power channels, inactivity passage, the first measurement passage corresponding with power channels is arranged, the second measurement passage corresponding with the inactivity passage, voltage standing wave ratio is measured plate and first and is measured passage, and/or, second measures passage links to each other, and it is characterized in that described base station radio-frequency front end further comprises:
Stride the passage directional coupler, be used for having the part of power channels forward power to be coupled to the inactivity passage base station radio-frequency front end, the one end is positioned to be had by the forward power of the power channels transmission line, and the other end is connected to the forward power input interface of inactivity passage;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
7. the system of measurement base station antenna feeder voltage standing wave ratio according to claim 6, the power channels that has of described base station radio-frequency front end comprises first duplexer and the first antenna feeder interface, it is characterized in that, described have the forward power transmission line of power channels to be:
Be connected to the transmission line of the emission interface of first duplexer;
Or
First duplexer close transmission line between the terminal and the first antenna feeder interface.
8. according to the system of claim 6 or 7 described measurement base station antenna feeder voltage standing wave ratioes, it is characterized in that, described inactivity passage comprises second duplexer and the second antenna feeder interface, a described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to the emission interface of second duplexer.
9. according to the system of claim 6 or 7 described measurement base station antenna feeder voltage standing wave ratioes, it is characterized in that described inactivity passage comprises the receiving filter and the second antenna feeder interface, described base station radio-frequency front end further comprises:
Emission filter, passband are the transmit frequency band of base station system, and the one end is connected to strides the passage directional coupler, and the other end is connected to the second antenna feeder interface;
A described end of striding the passage directional coupler is positioned at and has by the forward power of the power channels transmission line, and the other end is connected to emission filter.
10. a method of measuring the base station antenna feeder voltage standing wave ratio is characterized in that, this method comprises:
A, the base station there is the part in the forward signal of power channels, is coupled to base station inactivity passage as coupled signal;
B, the forward power that the part of coupled signal is coupled to the inactivity passage are measured interface, and another part outputs in the antenna feeder of inactivity passage;
C, receive the reflected signal of described antenna feeder, the backward power that the part of reflected signal is coupled to the inactivity passage is measured interface, and another part absorbs with filter;
D, measure interface and backward power is measured the interface measured signal power, obtain forward power and backward power in described forward power;
E, according to resulting forward power and backward power among the step D, calculate the voltage standing wave ratio of inactivity passage antenna feeder;
Described have power channels be have the input forward power passage; Described inactivity passage is not for importing the passage of forward power.
11. the method for measurement base station antenna feeder voltage standing wave ratio according to claim 10 is characterized in that, steps A is described to be coupled to base station inactivity passage with coupled signal and to be:
A1, coupled signal is carried out the bandpass filtering that passband is the base station frequency range;
A2, filtered signal is outputed to base station inactivity passage.
12. the method for measurement base station antenna feeder voltage standing wave ratio according to claim 11 is characterized in that, steps A is described to have the base station a part in the forward signal of power channels, is coupled to base station inactivity passage as coupled signal and is:
The base station is had power channels forward signal power 1/10th, be coupled to base station inactivity passage as coupled signal.
13. the method for measurement base station antenna feeder voltage standing wave ratio according to claim 11 is characterized in that, further comprises between step D and step e:
Degree of coupling correction forward power when measuring interface with the forward power that among the step B part of coupled signal is coupled to the inactivity passage, the degree of coupling correction backward power during with the backward power measurement interface that among the step C part of reflected signal is coupled to the inactivity passage.
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| CN2006100758128A CN1983882B (en) | 2006-04-18 | 2006-04-18 | Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio |
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| CN2006100758128A CN1983882B (en) | 2006-04-18 | 2006-04-18 | Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio |
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| CN1983882B true CN1983882B (en) | 2011-11-16 |
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| CN2006100758128A Expired - Fee Related CN1983882B (en) | 2006-04-18 | 2006-04-18 | Radio-frequency front, system and method for measuring antenna feedback voltage resident wave ratio |
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| CN103063908B (en) * | 2009-08-27 | 2015-06-10 | 珠海银邮光电技术发展股份有限公司 | Method of detecting mobile communication system antenna standing wave ratio by radio frequency identification devices (RFID) |
| CN101995513B (en) * | 2009-08-27 | 2013-01-09 | 珠海银邮光电技术发展股份有限公司 | Algorithms for detecting feeder line radio-frequency power and antenna standing-wave ratio in mobile communication system through RFID |
| CN101814963A (en) * | 2010-02-25 | 2010-08-25 | 飞创(苏州)电讯产品有限公司 | Automatic microwave electronic adjustable loading device and detection method thereof |
| CN101900763B (en) * | 2010-07-23 | 2012-07-04 | 四川九洲电器集团有限责任公司 | Method for monitoring constant standing-wave ratio |
| CN102025433B (en) * | 2010-12-29 | 2013-06-26 | 华为技术有限公司 | Signal detection method, detection device and detection base station |
| US9113367B2 (en) | 2011-04-29 | 2015-08-18 | Optis Cellular Technology, Llc | Method, apparatus and system for determining voltage standing wave ratio in a downlink period of radio communication |
| CN102185669B (en) * | 2011-05-05 | 2015-06-03 | 中兴通讯股份有限公司 | Method and device for determining state of antenna feed system |
| CN105629070B (en) * | 2015-12-22 | 2019-02-15 | 天津理工大学 | A kind of device and method measuring antenna standing wave ratio |
| CN113203892B (en) * | 2021-04-20 | 2024-02-06 | 中国科学院近代物理研究所 | Microwave power measuring device and method |
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| CN1195260A (en) * | 1997-03-31 | 1998-10-07 | 三星电子株式会社 | Method for measuring standing wave ratio in mobile communication system |
| CN1211892A (en) * | 1997-07-10 | 1999-03-24 | Lg情报通信株式会社 | Apparatus and method for measuring voltage standing wave radio in antenna of base station |
| CN1296186A (en) * | 1999-11-10 | 2001-05-23 | 现代电子产业株式会社 | Equipment and method for testing antenna by switch |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1195260A (en) * | 1997-03-31 | 1998-10-07 | 三星电子株式会社 | Method for measuring standing wave ratio in mobile communication system |
| CN1211892A (en) * | 1997-07-10 | 1999-03-24 | Lg情报通信株式会社 | Apparatus and method for measuring voltage standing wave radio in antenna of base station |
| CN1296186A (en) * | 1999-11-10 | 2001-05-23 | 现代电子产业株式会社 | Equipment and method for testing antenna by switch |
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