CN214849055U - Phase balancer and base station antenna - Google Patents
Phase balancer and base station antenna Download PDFInfo
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- CN214849055U CN214849055U CN202120834958.6U CN202120834958U CN214849055U CN 214849055 U CN214849055 U CN 214849055U CN 202120834958 U CN202120834958 U CN 202120834958U CN 214849055 U CN214849055 U CN 214849055U
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Abstract
The utility model provides a phase balancer, including main line and a plurality of branch circuit, a plurality of branch circuit connect in parallel respectively on the main line, the end of a plurality of branch circuit is short circuit and/or open circuit, the both ends of main line set up as the input port and the output port of phase balancer respectively; after the signal enters from the input port, the signal sequentially reaches the tail ends of the branch lines one by one through the main line, a reflection signal is formed at the tail end of each branch line and returns to the main line along the branch line and continues to advance along the main line, and the signal finally reaches the output port after multipath superposition. The utility model also provides an including the base station antenna of phase place balancer. Therefore, the utility model discloses can change the phase slope, realize phase balance to improve the radiation performance of base station antenna.
Description
Technical Field
The utility model relates to a mobile communication base station antenna technical field especially relates to a phase balancer and base station antenna.
Background
As mobile communication networks play more and more important roles in human life and are almost needed to be used at any time and any place, the use scenes of antennas are more and more abundant as an indispensable part of the mobile communication networks, and the requirements on the size and the performance of the antennas are more and more strict, for example, the requirement on side lobes in the 1710-2690MHz frequency band is more than 16dB and even 18dB, and the requirement on the change range of a down dip angle is 0.8 degrees and even 0.5 degrees.
When an antenna pattern has a shaping requirement, a group of preset phases is usually designed, then the phase of each radiating element of the antenna array is adjusted to be in the same phase, and then the phase of a frequency band central frequency point is adjusted to be the preset phase. Ideally, the phases of each radiating element of the antenna array are in the same phase, that is, the electrical lengths from the antenna array port to each radiating element are the same, the corresponding phase curves are overlapped, and the preset phase changes in an ideal linear manner with the frequency. Therefore, as long as the directional diagram meets the design requirement when the central frequency point is adjusted to the preset phase, the directional diagrams of all frequency points in the frequency band meet the design requirement. However, in practice, both the radiation units of the antenna array and the feed network themselves are difficult to satisfy the theoretical phase linearity, and in addition, mutual coupling exists between adjacent radiation units, the boundaries of each radiation unit may be different, so the reflection coefficients of different radiation units may also be different, so that when the phase of each radiation unit in the antenna array is adjusted to the same phase with the center frequency point as the reference, other frequency points cannot be in phase, corresponding phase curves cannot be coincident, that is, the phase slope of each radiation unit is different. When the preset phase fluctuates too much with the frequency change, the antenna radiation performance is deteriorated, such as high side lobe, large change range of downward inclination angle, wave width divergence, gain reduction and the like. Obviously, the wider the frequency band is, the more serious the actual phase of the radiation unit deviates from the preset phase, and the influence on the antenna side lobe, the downward inclination angle variation range, the wave width and the gain is aggravated.
Therefore, in order to improve the phase slope difference of the antenna radiation unit and improve the performance indexes such as the antenna side lobe, the change range of the downtilt angle, the wave width, the gain and the like, a method capable of changing the phase slope of the signal and realizing the phase balance is needed.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect, the present invention provides a phase balancer and a base station antenna, which can change the phase slope to realize the phase balance, thereby improving the radiation performance of the base station antenna.
In order to achieve the above object, the present invention provides a phase balancer, which includes a main line and a plurality of branch lines, wherein the branch lines are respectively connected in parallel to the main line, the ends of the branch lines are short-circuited and/or open-circuited, and two ends of the main line are respectively set as an input port and an output port of the phase balancer; after the signal enters from the input port, the signal sequentially reaches the tail ends of the branch lines one by one through the main line, a reflection signal is formed at the tail end of each branch line and returns to the main line along the branch line and continues to advance along the main line, and the signal finally reaches the output port after multipath superposition.
According to the utility model discloses a phase balancer, have at least one in a plurality of branch circuit the end of branch circuit is the short circuit, has at least one the end of branch circuit is for opening a way.
According to the present invention, the main line is connected in parallel with at least one branch line combination, and the branch line combination includes at least one first branch line and at least one second branch line; the first branch line and the second branch line are respectively arranged at two sides of the main line, and the first branch line and the second branch line have a common line intersection point on the main line.
According to the phase balancer of the present invention, the end of the first branch line is short-circuited, and the end of the second branch line is open-circuited; or
The tail ends of the first branch line and the second branch line are short-circuited; or
The ends of the first branch line and the second branch line are open.
According to the utility model discloses a phase balancer, the length of branch circuit is close the quarter wavelength of the high-end frequency of working frequency channel.
According to the utility model discloses a phase balancer, the length of branch circuit is the fifth wavelength to the third wavelength of the high-end frequency of working frequency channel.
According to the present invention, the branch line combination comprises a first branch line and a second branch line, the end of the first branch line is short-circuited, and the end of the second branch line is open-circuited;
when the lengths of the first branch line and the second branch line are equal to a quarter wavelength of a high-end frequency of an operating frequency band; the signal on the first branch line has the maximum current at the short circuit and the minimum current at a quarter wavelength away from the short circuit; the signal on the second branch line has the minimum current at the open circuit and the maximum current at the quarter wavelength away from the open circuit;
when the lengths of the first branch line and the second branch line are both smaller than the quarter wavelength of the high-end frequency of the working frequency band, the current of the first branch line at the intersection point of the lines is between the minimum and the maximum; the current of the second branch line at the line intersection point is between the maximum and the minimum; the current amplitude of the first branch line at the line intersection point is smaller than that of the second branch line at the line intersection point;
when the lengths of the first branch line and the second branch line are both longer than the quarter wavelength of the high-end frequency of the working frequency band, the current of the first branch line at the intersection point of the lines is between the maximum and the minimum; the current of the second branch line at the line intersection point is between the minimum and the maximum; the current amplitude of the first branch line at the line intersection is larger than that of the second branch line at the line intersection.
According to the utility model discloses a phase balancer, the shape of branch circuit is straight line shape, dogleg shape or camber line shape.
According to phase balancer, the line width of branch circuit is 0.1 ~ 0.5 mm.
According to the utility model discloses a phase balancer, phase balancer sets up on the double-sided circuit board.
According to phase balancer, phase balancer uses on one minute two merit minute board, butler board or the looks ware of two-sided printed wiring board structure.
The utility model also provides a base station antenna, including as any the phase balancer.
The utility model discloses a phase balancer comprises a main line and a plurality of branch lines intersected with the main line, the tail ends of the branch lines are short-circuited and/or open-circuited, and the two ends of the main line are respectively an input port and an output port of the phase balancer; when the signal enters from the input port of the phase balancer, the signal reaches the tail ends of the branch lines one by one in sequence through the main line, a reflection signal is formed at the tail end of each branch line, the reflection signal returns to the main line along the branch line and continues to move forward along the main line, and the signal finally reaches the output port of the phase balancer after multipath superposition. Because the corresponding electrical lengths of the same path to different frequencies are different, the signals returned from the branch line to the main line at different frequencies are different, and the phase change amounts of the signals finally reaching the output port of the phase balancer after multipath superposition are different, that is, the phase slope is changed, so that the phase balance can be realized. The utility model discloses phase balancer can be used in the various parts of base station antenna in a flexible way, can improve the radiation performance of base station antenna, and it is high to solve the base station antenna because of the phase slope difference causes the side lobe, and downtilt angle variation range is big, the wave width disperses and the gain reduces the scheduling problem.
Drawings
Fig. 1 is a schematic structural diagram of a phase balancer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the initial phases of two signals;
FIG. 3 is a schematic phase diagram of two signals after being adjusted to the same phase by a conventional method;
FIG. 4 is a schematic diagram of two paths of signals passing through the balanced phase of the phase balancer and then being adjusted to the same phase by a conventional method;
fig. 5 is a schematic structural diagram of a phase balancer applied to a one-to-two power splitting board according to an embodiment of the present invention;
FIG. 6 is a schematic phase diagram of the one-to-two power splitting plate shown in FIG. 5;
fig. 7 is a schematic structural diagram of a phase balancer applied to a butler board according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a phase balancer applied to a phase shifter according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Moreover, where certain terms are used throughout the description and following claims to refer to particular components or features, those skilled in the art will understand that manufacturers may refer to a component or feature by different names or terms. This specification and the claims that follow do not intend to distinguish between components or features that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. In addition, the term "connected" as used herein includes any direct and indirect electrical connection. Indirect electrical connection means include connection by other means.
Fig. 1 shows a structure of a phase balancer, according to an embodiment of the present invention, the phase balancer 100 includes a main line 10 and a plurality of branch lines 20, the plurality of branch lines 20 are respectively connected in parallel to the main line 10, and ends of the plurality of branch lines 20 are short-circuited and/or open-circuited. Preferably, at least one of the branch lines 20 has a short circuit at its end, and at least one of the branch lines 20 has an open circuit at its end. Preferably, the length of the branch line 20 is approximately a quarter wavelength of the high-end frequency of the operating band, and more preferably, the length of the branch line 20 is from one fifth wavelength to one third wavelength of the high-end frequency of the operating band. Both ends of the main line 10 are respectively provided as an input port 31 and an output port 32 of the phase balancer 100. When a signal enters from the input port 31 of the phase balancer 100, the signal sequentially reaches the ends of the branch lines 20 one by one through the main line 10, a reflected signal is formed at the end of each branch line 20, the reflected signal returns to the main line 10 along the branch line 20 and continues along the main line 10, and the signal finally reaches the output port 32 of the phase balancer 100 after multipath superposition. Since the same path has different electrical lengths for different frequencies, the signals returned from the branch line 20 to the main line 10 at different frequencies are different, and the phase change amount of the signal finally reaching the output port 32 of the phase balancer 100 after multipath superposition is different, that is, the phase slope is changed.
As shown in fig. 1, the main line 10 is connected in parallel with four first branch lines 21 and four second branch lines 22, and when a signal enters from the input port 31, the signal reaches a first line intersection 40 (i.e., the leftmost line intersection) of the main line 10 and the branch lines 20 through the main line 10, a part of the signal enters the first branch line 21 (i.e., the leftmost first branch line) and the first second branch line 22 (i.e., the leftmost second branch line) and returns to the first line intersection 40, and then the superimposed signal continues to travel along the main line 10 to reach a second line intersection 40 of the main line 10 and the branch lines 20, enters the second first branch line 21 and the second branch line 22 …, and so on, and finally reaches the output port 32.
The utility model discloses phase balancer 100 can change signal phase slope, makes the signal change through phase balancer 100's multipath superposition effect back phase slope, realizes phase balance, can use phase balancer 100 in the base station antenna part in a flexible way to solve because of radiating element's signal phase slope difference causes base station antenna side lobe height, and down dip angle variation range is big, the wave width disperses and the gain reduces the scheduling problem.
Preferably, the phase balancer 100 is provided on the double-sided wiring board 200. Of course, the phase balancer 100 may be provided on a single-sided wiring board.
The larger the characteristic impedance of the branch line 20, i.e., the narrower the line width, the smaller the influence of the impedance transformation on the line intersection 40 (i.e., the parallel point). Therefore, the line width of the branch line 20 is preferably 0.1 to 0.5 mm. More preferably, the line width of the branch line 20 is approximately 0.3 mm.
The shape of the branch line 20 is preferably any shape such as a straight line, a zigzag line, or an arc line. In the preferred embodiment shown in fig. 1, the branch lines 20 are in the shape of doglegs.
Preferably, at least one branch line combination is connected in parallel to the main line 10 of the phase balancer 100, as shown in fig. 1, the branch line combination includes at least one first branch line 21 and at least one second branch line 22, i.e., the number of branch lines in each branch line combination is greater than or equal to 2. The first branch line 21 and the second branch line 22 are respectively provided on both sides of the main line 10, and the first branch line 21 and the second branch line 22 have a common line intersection 40 on the main line 10. In this embodiment, the end of the first branch line 21 is short-circuited, and the end of the second branch line 22 is open-circuited. Of course, the ends of the first branch line 21 and the second branch line 22 may be both short-circuited; alternatively, the ends of the first branch line 21 and the second branch line 22 are both open. The branch lines with short circuit ends can be called short circuit branch lines, and the branch lines with open circuit ends can be called open circuit branch lines.
In the preferred embodiment of the present invention, the branch circuit combination comprises a first branch circuit 21 and a second branch circuit 22, the end of the first branch circuit 21 is short-circuited, and the end of the second branch circuit 22 is open-circuited. The first branch line 21 and the second branch line 22 are respectively provided on both sides of the main line 10, and the first branch line 21 and the second branch line 22 have a common line intersection 40 on the main line 10. As shown in fig. 1, the phase balancer 100 is printed on the double-sided circuit board 200, two ends of the main line 10 of the phase balancer 100 are respectively set as the input port 31 and the output port 32, the signal enters from the input port 31, reaches the first line intersection 40 (i.e., the leftmost line intersection) of the main line 10 and the branch lines 20 through the main line 10, part of the signal enters the first branch line 21 and the second branch line 22 in the first branch line combination (i.e., the leftmost branch line combination) and returns to the first line intersection 40, and then the superimposed signal continues to travel along the main line 10 to reach the second line intersection 40 of the main line 10 and the branch lines 20, enters the first branch line 21 and the second branch line 22 … in the second branch line combination, and so on, and finally reaches the output port 32.
Preferably, the lengths of the first branch line 21 and the second branch line 22 are approximately a quarter wavelength of the high-end frequency of the operating frequency band, and more preferably, the lengths of the first branch line 21 and the second branch line 22 are from one fifth wavelength to one third wavelength of the high-end frequency of the operating frequency band.
Taking the first branch line combination as an example, the other branch line combinations are the same. When the lengths of the first branch line 21 and the second branch line 22 are equal to a quarter wavelength of the high-end frequency of the operating band. Ideally, the microwave signal on the transmission line is related to the electrical length of the corresponding path, and in comparison, the signal reduction factor on the first branch line 21 is a cosine function related to the electrical length of the corresponding path, and the signal reduction factor on the second branch line 22 is-j times the sine function related to the electrical length of the corresponding path. Specifically, the signal on the first branch line 21 has the maximum current (-j) at the short circuit, zero impedance, and a reflection coefficient of-1; the current is minimum (0) at a quarter wavelength from the short, the impedance is infinite, and the reflection coefficient is 1. The signal on the second branch line 22 has the minimum current at the open circuit, infinite impedance and 1 reflection coefficient; the current is maximum at a quarter wavelength from the open circuit, the impedance is zero, and the reflection coefficient is-1.
When the lengths of the first branch line 21 and the second branch line 22 are both slightly less than a quarter wavelength, such as a fifth wavelength, of the high-end frequency of the operating frequency band, the current of the first branch line 21 at the line intersection 40 is between the minimum and the maximum. The current of the second branch line 22 at the line intersection 40 is between maximum and minimum. The current amplitude of the first branch line 21 at the line intersection 40 is smaller than the current amplitude of the second branch line 22 at the line intersection 40.
When the lengths of the first branch line 21 and the second branch line 22 are both slightly longer than a quarter wavelength, such as a third wavelength, of the high-end frequency of the operating band, the current of the first branch line 21 at the line intersection 40 is between maximum and minimum. The current of the second branch line 22 at the line intersection 40 is between a minimum and a maximum. The current amplitude of the first branch line 21 at the line intersection 40 is greater than the current amplitude of the second branch line 22 at the line intersection 40.
Therefore, the current characteristics and impedance characteristics of the signals of the first branch line 21 and the second branch line 22 at the line intersection 40 are different, so that when the branch line combination respectively consists of two short-circuit branch lines, two open-circuit branch lines, and a short-circuit branch line and an open-circuit branch line, the current characteristics and impedance characteristics of the superposed signals generated at the line intersection 40 are different under three conditions, the effects of the superposed signals on the power distribution and impedance transformation of the line intersection 40 are different, and the different characteristics of the short-circuit branch line and the open-circuit branch line can be compromised by connecting the short-circuit branch line and the open-circuit branch line in parallel, so that the power distribution and impedance transformation of the parallel points are balanced, and the overall performance is more in accordance with the design requirements.
It should be reminded that when the length of the branch line 20 is close to a quarter wavelength of the high-end frequency of the operating frequency band, the degree of the multipath superposition change of the signal of the high-end frequency at the line intersection 40 is greater than that of the low-end frequency, so that the more the branch line combinations are, the greater the phase slope change is.
Fig. 2 to 4 are schematic diagrams showing phases of two signals under three conditions.
Fig. 2 is a schematic diagram of the initial phases of two signals, the initial phases of two signals 1 and 2 at frequency points f1, and the phase difference between f2 and f3 increases with the increase of frequency, and ideally, when f2 is equal to (f1+ f3)/2, the phase differences at frequency points f1, f2 and f3 are in an equal difference sequence.
Fig. 3 is a schematic phase diagram of two signals after being modulated to be in phase by a conventional method, where signals 1-1 and 2-1 after being modulated to be in phase by two signals 1 and 2 are in phase at frequency point f2, that is, the phase difference is zero, the phase difference at frequency point f1 and frequency point f3 is the same, and the sum of the phase differences is the same as before being modulated to be in phase.
Fig. 4 is two way signals through the utility model discloses phase place sketch map after adjusting to the cophase according to conventional approach behind phase balancer's the balanced phase place, will be through two way signals 1 after phase balance and 2 adjust to the cophase signal 1-2 and 2-2 at frequency point f2 cophase according to conventional approach, the phase difference is zero promptly, and the phase difference at frequency point f1 and f3 is the same, but owing to passed through phase balance, this phase difference sum has become littleer with what fig. 3 was shown.
Preferably, the phase balancer 100 of the present invention can be applied to the one-to-two power splitting board 300, the butler board 400, or the phase shifter 500 of the double-sided printed circuit board structure.
Fig. 5 is a schematic structural diagram of the phase balancer applied to the one-to-two power splitting board according to an embodiment of the present invention, where the one-to-two power splitting board 300 includes a power splitter main path 40, a first power splitter branch 50, and a second power splitter branch 60. The phase balancer 100 is applied to the first power splitter branch 50 of a one-to-two power splitter board 300 of a double-sided printed circuit board structure, and the phase balancer 100 includes two branch line combinations, each branch line combination includes a first branch line 21 and a second branch line 22, the end of the first branch line 21 is short-circuited, and the end of the second branch line 22 is open-circuited. The length of each of the first branch line 21 and the second branch line 22 is approximately two-quarter wavelength of the high-end frequency of the operating band. As shown in fig. 6, it can be seen that, under the action of the phase balancer 100, the slope of the phase of the first power divider branch 50 and the second power divider branch 60 corresponding to the one-to-two power divider board 300 is significantly reduced, specifically, about 175 ° to 1710MHz, about 180 ° to 2200MHz, and about 180 ° to 2690 MHz.
Fig. 7 is a schematic structural diagram of the phase balancer applied to the butler board according to the embodiment of the present invention, the phase balancer 100 shown in fig. 1 is applied to the butler board 400 of the double-sided printed circuit board structure, two phase balancers 100 are disposed on the butler board 400, and the phase slope between the ports 1 and 3, 2 and 4 on the butler board 400 is reduced by the two phase balancers 100, so as to implement pattern forming optimization.
Fig. 8 is a schematic structural diagram of the phase balancer applied to the phase shifter, the phase balancer 100 shown in fig. 1 is applied to the phase shifter 500 of the double-sided printed circuit board structure, the three phase balancers 100 are arranged on the phase shifter 500, and the phase slope between the ports 1, 5, 6 and 2, 3, 4 on the phase shifter 500 is reduced through the three phase balancers 100, so as to realize the pattern-forming optimization.
The present invention also provides a base station antenna including the phase balancer 100 shown in fig. 1 to 8.
To sum up, the phase balancer of the present invention comprises a main line and a plurality of branch lines intersecting the main line, wherein the ends of the branch lines are short-circuited and/or open-circuited, and the two ends of the main line are respectively an input port and an output port of the phase balancer; when the signal enters from the input port of the phase balancer, the signal reaches the tail ends of the branch lines one by one in sequence through the main line, a reflection signal is formed at the tail end of each branch line, the reflection signal returns to the main line along the branch line and continues to move forward along the main line, and the signal finally reaches the output port of the phase balancer after multipath superposition. Because the corresponding electrical lengths of the same path to different frequencies are different, the signals returned from the branch line to the main line at different frequencies are different, and the phase change amounts of the signals finally reaching the output port of the phase balancer after multipath superposition are different, that is, the phase slope is changed, so that the phase balance can be realized. The utility model discloses phase balancer can be used in the various parts of base station antenna in a flexible way, can improve the radiation performance of base station antenna, and it is high to solve the base station antenna because of the phase slope difference causes the side lobe, and downtilt angle variation range is big, the wave width disperses and the gain reduces the scheduling problem.
Naturally, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and it is intended that all such changes and modifications be considered as within the scope of the appended claims.
Claims (12)
1. The phase balancer is characterized by comprising a main line and a plurality of branch lines, wherein the branch lines are respectively connected in parallel on the main line, the tail ends of the branch lines are short-circuited and/or open-circuited, and two ends of the main line are respectively set as an input port and an output port of the phase balancer; after the signal enters from the input port, the signal sequentially reaches the tail ends of the branch lines one by one through the main line, a reflection signal is formed at the tail end of each branch line and returns to the main line along the branch line and continues to advance along the main line, and the signal finally reaches the output port after multipath superposition.
2. The phase balancer of claim 1, wherein at least one of the branch lines is short-circuited at its end and open-circuited at its end.
3. The phase balancer of claim 1, wherein the main line is connected in parallel with at least one branch line combination, the branch line combination comprising at least one first branch line and at least one second branch line; the first branch line and the second branch line are respectively arranged at two sides of the main line, and the first branch line and the second branch line have a common line intersection point on the main line.
4. The phase balancer of claim 3, wherein an end of the first branch line is short-circuited and an end of the second branch line is open-circuited; or
The tail ends of the first branch line and the second branch line are short-circuited; or
The ends of the first branch line and the second branch line are open.
5. The phase balancer of claim 4, wherein the branch lines have a length close to a quarter wavelength of a high-end frequency of the operating band.
6. The phase balancer of claim 5, wherein the branch lines have a length of one fifth wavelength to one third wavelength of a high-end frequency of the operating band.
7. The phase balancer of claim 4, wherein the branch line combination includes a first branch line and a second branch line, ends of the first branch line being short-circuited and ends of the second branch line being open-circuited;
when the lengths of the first branch line and the second branch line are equal to a quarter wavelength of a high-end frequency of an operating frequency band; the signal on the first branch line has the maximum current at the short circuit and the minimum current at a quarter wavelength away from the short circuit; the signal on the second branch line has the minimum current at the open circuit and the maximum current at the quarter wavelength away from the open circuit;
when the lengths of the first branch line and the second branch line are both smaller than the quarter wavelength of the high-end frequency of the working frequency band, the current of the first branch line at the intersection point of the lines is between the minimum and the maximum; the current of the second branch line at the line intersection point is between the maximum and the minimum; the current amplitude of the first branch line at the line intersection point is smaller than that of the second branch line at the line intersection point;
when the lengths of the first branch line and the second branch line are both longer than the quarter wavelength of the high-end frequency of the working frequency band, the current of the first branch line at the intersection point of the lines is between the maximum and the minimum; the current of the second branch line at the line intersection point is between the minimum and the maximum; the current amplitude of the first branch line at the line intersection is larger than that of the second branch line at the line intersection.
8. The phase balancer of claim 1, wherein the branch line has a shape of a straight line, a broken line, or an arc line.
9. The phase balancer as claimed in claim 1, wherein the branch line has a line width of 0.1 to 0.5 mm.
10. The phase balancer of claim 1, wherein the phase balancer is disposed on a double-sided wiring board.
11. The phase balancer of claim 10, wherein the phase balancer is applied to a one-to-two power splitting board, a butler board, or a phase shifter of a double-sided printed wiring board structure.
12. A base station antenna comprising a phase balancer as claimed in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120834958.6U CN214849055U (en) | 2021-04-22 | 2021-04-22 | Phase balancer and base station antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120834958.6U CN214849055U (en) | 2021-04-22 | 2021-04-22 | Phase balancer and base station antenna |
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| CN214849055U true CN214849055U (en) | 2021-11-23 |
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| CN202120834958.6U Active CN214849055U (en) | 2021-04-22 | 2021-04-22 | Phase balancer and base station antenna |
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