Miniaturized V-shaped microstrip power divider for traffic radar
By designing a miniaturized V-shaped microstrip power divider in a traffic radar system, and independently adjusting the phase and amplitude using the V-shaped first feeder and wavelength matching block, the problem of complex design and difficulty in miniaturization of the power divider in the prior art is solved, and the effective miniaturization of the power divider in the traffic radar system with high gain needs is achieved.
Patent Information
- Application Number
- CN202421506040.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In existing traffic radar systems, the gain demand for surface array antennas increases, resulting in complex design of power splitters and difficult to achieve miniaturization.
A miniaturized V-shaped microstrip power divider is designed to independently adjust the phase and amplitude distribution of the power divider through the V-shaped first feeder and wavelength matching blocks of different widths, thereby reducing the design difficulty and miniaturizing it.
By independently controlling the amplitude and phase distribution of the power splitter, the design difficulty is reduced, the power splitter is miniaturized, and it is suitable for traffic radar systems with high gain requirements.
Smart Images
Figure CN222673280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power dividers, in particular to a miniaturized V-shaped microstrip power divider for traffic radar. Background Art
[0002] The layout interval of traffic radar is usually determined by the maximum detection distance of the radar. The longer the corresponding detection distance, the fewer traffic radars need to be deployed for the same kilometer, and the cost savings can be considerable. Therefore, the requirements for the maximum detection distance of traffic radar are increasing day by day, and the corresponding requirements for the gain of traffic antennas are also increasing. The use of arrays for transceiver antennas can provide higher gain and improve the detection distance of radars.
[0003] The larger the array antenna is, the more power divider ports are needed. The parameters of conventional power dividers grow in a square or even exponential manner with the number of ports. Therefore, as the number of ports of the power divider increases, the design difficulty of the corresponding power divider increases and the design cycle also increases. In the prior art, when designing a power divider, the amplitude and phase adjustment processes of the power divider are coupled with each other, making the design of the power divider complicated. In addition, in the design of the power divider, the power divider is required to occupy as little area as possible. Utility Model Content
[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a miniaturized V-shaped microstrip power divider for traffic radar. By using a V-shaped first feeder, when designing the power divider, the phase distribution of the power divider can be adjusted by selecting the first feeder with different bending vertex positions; by using wavelength matching blocks with different widths, the amplitude distribution of the power divider can be adjusted.
[0005] The technical solution adopted by the utility model to solve the problem is:
[0006] A miniaturized V-shaped microstrip power divider for a traffic radar comprises a signal input port and at least two signal output ports, wherein two adjacent signal output ports are connected via a first feeder, wherein the first feeder is V-shaped, and two ends of the first feeder are respectively connected to two adjacent output ports, and an end of the first feeder is connected to a wavelength matching block, and a microstrip patch antenna array is connected to the wavelength matching block, wherein the number of the microstrip patch antenna arrays is adapted to the number of the signal output ports and forms the signal output ports.
[0007] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, when designing the power divider, by designing and setting different positions of the apex of a V-shaped first feeder, it is achieved that the length of the first feeder is designed and set without changing the distance between two adjacent signal output ports, and the phases of the signal output ports connected at both ends of the first feeder can be distributed.
[0008] Furthermore: the widths of the wavelength matching blocks are equal or unequal.
[0009] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, when designing the power divider, by designing and setting the width of each wavelength matching block, the widths of each wavelength matching block are equal or unequal, or the widths of several wavelength matching blocks are equal or unequal, so that the amplitude distribution of the signal output port corresponding to the wavelength matching block can be achieved.
[0010] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, the first feed line is designed to be V-shaped, and the coupling degree between the first feed line and the wavelength matching frame is low. By adjusting these two parts, the amplitude and phase distribution of the power divider can be independently controlled and adjusted, which greatly reduces the difficulty of power divider design.
[0011] Furthermore: the first feeder includes a bending vertex and feeder segments located at both ends of the bending vertex, and the lengths of the feeder segments located at both ends of the bending vertex are adapted to each other.
[0012] Furthermore: there are at least three signal output ports, the distance between two adjacent signal output ports is adapted, there are at least two first feeders, and the heights of the bending vertices of each of the first feeders are equal or unequal.
[0013] Furthermore: the signal output ports have eight.
[0014] Furthermore: the length of the wavelength matching block is one quarter of the medium wavelength.
[0015] Furthermore: the signal input port is connected to a second feeder, the second feeder is connected to a matching section, and the matching section is connected to one of the first feeders.
[0016] Furthermore: the matching section is connected to a bending vertex of one of the first feed lines.
[0017] Furthermore: the microstrip patch antenna array is a 16-unit microstrip patch antenna array.
[0018] In summary, the miniaturized V-shaped microstrip power divider for traffic radar provided by the utility model has the following technical effects:
[0019] By using a V-shaped first feeder, when designing a power divider, the phase distribution of the power divider can be adjusted by selecting the first feeder with different bending vertex positions; and the amplitude distribution of the power divider can be adjusted by using wavelength matching blocks of different widths.
[0020] In this solution, the coupling degree between the first feed line and the wavelength matching section is relatively low. When designing the power divider, the amplitude and phase distribution of the power divider can be independently controlled and adjusted by adjusting the two parts, thereby reducing the design difficulty of the power divider and realizing the miniaturization of the power divider. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 The utility model is a schematic structural diagram of an embodiment of a miniaturized V-shaped microstrip power divider for traffic radar.
[0022] Figure 2 It is a schematic diagram of an embodiment of the area array structure in the utility model.
[0023] The meanings of the reference numerals are as follows:
[0024] 1. First feed line; 11. Bending apex; 2. Wavelength matching block; 3. Matching section; 4. Second feed line. DETAILED DESCRIPTION
[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0028] See also Figure 1 and Figure 2 The utility model discloses a miniaturized V-shaped microstrip power divider for traffic radar.
[0029] A miniaturized V-shaped microstrip power divider for traffic radar comprises a signal input port A1 and at least two signal output ports. Figure 1 In the figure, labels A2 to A9 are all signal output ports, and two adjacent signal output ports are connected by a first feeder 1. The first feeder 1 is V-shaped, and the two ends of the first feeder 1 are respectively connected to two adjacent output ports. The end of the first feeder 1 is connected to a wavelength matching block 2, and the wavelength matching block 2 is connected to a microstrip patch antenna array. The number of the microstrip patch antenna arrays is adapted to the number of the signal output ports and forms the signal output ports.
[0030] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, when designing the power divider, by designing and setting different positions of the apex of a V-shaped first feeder, that is, designing and setting the V-shaped depth of the first feeder, it is achieved that the length of the first feeder is designed and set without changing the distance between two adjacent signal output ports, and the phases of the signal output ports connected at both ends of the first feeder can be distributed.
[0031] In a power divider, there is a direct relationship between feed line length and phase. Specifically, feed line length affects the phase of the signal because the signal has a limited propagation speed in the feed line, causing the signal to experience different phase delays on feed lines of different lengths. In power divider systems that require phase consistency, such as phased array radar or synchronous communication systems, the feed line length must be precisely matched to ensure that the phase delay of all paths is the same. In a power divider system with phase variation, if the feed line lengths are different, the phase of the signal on different paths will be inconsistent, resulting in a decrease in system performance. For a signal of a given frequency, the longer the feed line, the longer the signal propagates and the greater the accumulated phase delay.
[0032] In general, standard power dividers are designed to have the same phase at each port to simplify design and application. In applications that require a specific phase difference, such as some antenna systems or multi-channel synthesis devices, the power divider will be designed to have a specific phase difference to meet the functional requirements of the system.
[0033] Therefore, in this solution, when designing the power divider, different V-shaped vertices of the first feed line are selected to be set at different positions according to the requirements of the power divider, so that each signal output port has the required phase difference, thereby realizing the phase distribution of each signal output port.
[0034] In the technical solution, the widths of the wavelength matching blocks 2 are equal or unequal.
[0035] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, when designing the power divider, by designing and setting the width of each wavelength matching block, the widths of each wavelength matching block are equal or unequal, or the widths of several wavelength matching blocks are equal or unequal, so that the amplitude distribution of the signal output port corresponding to the wavelength matching block can be achieved.
[0036] In an asymmetric power splitter, i.e. a power splitter in which the power distribution at different output ports is uneven, the wavelength matching block plays an important role.
[0037] For example, in an asymmetric power divider, different output ports also need to maintain a specific phase relationship, especially in systems that require high-precision phase synchronization. The wavelength matching block can compensate for the phase delay caused by feeder length or path differences, ensuring that the signal at each output port arrives at the expected phase.
[0038] For example, in an asymmetric power divider, the power distribution of each output port is different, which may cause the physical length and electrical length of the signal path to be inconsistent. The wavelength matching block adjusts the phase of different paths so that all output signals meet the design requirements in terms of phase.
[0039] For example, when optimizing frequency response, an asymmetrical power divider may exhibit different phase delays at different frequencies. A wavelength matching block can help adjust these phase delays so that the system maintains a consistent phase response over a wide frequency band, thereby improving signal integrity and quality.
[0040] For example, the effect of reducing signal interference and reflection is that phase mismatch of different paths may cause signal reflection and interference. The wavelength matching block adjusts the phase to minimize the mutual interference of signals of each path, reduce unnecessary reflection and interference, and improve the performance and stability of the system.
[0041] Therefore, in the technical solution of a miniaturized V-type microstrip power divider for traffic radar of the utility model, by designing and setting the width of each wavelength matching block, the width of each wavelength matching block is equal or unequal, or the widths of several wavelength matching blocks are equal or unequal, so as to realize the amplitude distribution of the signal output port corresponding to the wavelength matching block.
[0042] It is worth noting that the "equal" or "adaptable" mentioned in this solution refers to the equality of two values within the allowable error or tolerance range, and does not necessarily mean that the two values are completely equal. For example, if the widths of each wavelength matching block are equal, it means that the widths of each wavelength matching block are consistent, and the widths of each wavelength matching block are equal within the allowable tolerance or error range. If the width of the wavelength matching block is a and the allowable error range is b, then the size of each wavelength matching block between a±b meets the requirements. Similarly, the "unequal" mentioned in this solution refers to the inequality of two values outside the allowable error or tolerance range, and does not necessarily mean that two unequal values are "unequal". For example, if the widths of each wavelength matching block are unequal, it means that the widths of each wavelength matching block are unequal outside the allowable tolerance or error range. If the width of the wavelength matching block is a and the allowable error range is b, then the size of at least one wavelength matching block is between a±b, and at the same time, the width of at least one wavelength matching block is outside a±b, which meets the requirement that the widths of each wavelength matching block are unequal.
[0043] In addition, in this solution, “the widths of the wavelength matching blocks 2 are not equal” means that the width of at least one wavelength matching block is not equal to the width of another or any wavelength matching blocks, and does not mean that the widths of all wavelength matching blocks are not equal.
[0044] In the technical solution of a miniaturized V-shaped microstrip power divider for a traffic radar, the first feed line is designed to be V-shaped, and the coupling degree between the first feed line and the wavelength matching frame is low. By adjusting these two parts, the amplitude and phase distribution of the power divider can be independently controlled and adjusted, which greatly reduces the difficulty of power divider design.
[0045] The utility model is a miniaturized V-shaped microstrip power divider for traffic radar. The V-shaped first feeder structure and wavelength matching block are used to flexibly adjust the amplitude and phase of the power divider, which greatly reduces the design difficulty of the multi-port power divider and saves the design cycle. The width of the power divider does not exceed the width of the antenna of the array layout itself, and the height is less than 1 medium wavelength, which realizes the miniaturization of the power divider.
[0046] In the technical solution of the utility model, the first feeder 1 includes a bending apex 11 and feeder segments located at both ends of the bending apex 11, and the lengths of the feeder segments located at both ends of the bending apex 11 are adapted to each other. By adjusting the position and depth of the bending apex 11, the overall length of the first feeder is changed, but it is worth noting that when changing the overall length of the first feeder, only the position of the bending apex 11 needs to be changed, but the lengths of the feeder segments on both sides of the bending apex 11 remain equal or adapted. Without changing the distance and position between two adjacent signal output ports, the length of the first feeder and the bending apex 11 are adjusted to adjust the phase distribution of the corresponding ports.
[0047] In the technical solution of the utility model, Figure 1 As shown, there are at least three signal output ports, the distance between two adjacent signal output ports is adapted, there are at least two first feed lines 1, and the heights of the bending vertices 11 of each of the first feed lines 1 are equal or unequal.
[0048] In the technical solution of the utility model, Figure 1 As shown, there are eight signal output ports. The positions of the signal output ports are fixed and the distances are consistent. During design, by adjusting the bending vertex position and the wavelength matching block width of each first feeder line, or adjusting the bending vertex position or the wavelength matching block width of the first feeder line respectively, the amplitude and phase distribution of the power divider can be independently controlled and adjusted.
[0049] In the technical solution of the utility model, the length of the wavelength matching block 2 is one quarter of the medium wavelength, which is used to achieve impedance matching.
[0050] In the technical solution of the utility model, the signal input port is connected to a second feeder 4 , the second feeder 4 is connected to a matching section 3 , and the matching section 3 is connected to one of the first feeders 1 .
[0051] The second feeder line 4 is used to feed a signal. The characteristic impedance of the second feeder line 4 is 50 ohms.
[0052] In the technical solution of the utility model, the matching section 3 is connected to one of the bending vertices 11 of the first feeder 1. The matching section 3 is used to achieve impedance matching of the antenna port and reduce return loss.
[0053] Generally, the matching section 3 is connected to the bending vertex of the first feeder line 1 located in the middle, such as Figure 1 and Figure 2 As shown, the number of signal output ports of the microstrip power divider is an odd number, and the matching section 3 is connected to the bending vertex of the first feeder line 1 in the middle, so as to further reduce the return loss.
[0054] like Figure 2 As shown, it is a schematic diagram of the structure of an embodiment of the miniaturized V-type microstrip power divider. In this embodiment, the microstrip patch antenna array is a 16-unit microstrip patch antenna array.
[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.
Claims
1. A miniaturized V-shaped microstrip power divider for traffic radar, characterized in that: It includes a signal input port and at least two signal output ports, two adjacent signal output ports are connected by a first feeder, the first feeder is V-shaped, two ends of the first feeder are respectively connected to two adjacent output ports, the end of the first feeder is connected to a wavelength matching block, the wavelength matching block is connected to a microstrip patch antenna array, the number of the microstrip patch antenna arrays is adapted to the number of the signal output ports and forms the signal output ports.
2. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 1, characterized in that: The widths of the wavelength matching blocks are equal or unequal.
3. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 1 or 2, characterized in that: The first feeder line includes a bending vertex and feeder line segments located at two ends of the bending vertex, and the lengths of the feeder line segments located at two ends of the bending vertex are adapted to each other.
4. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 3, characterized in that: There are at least three signal output ports, and the distances between two adjacent signal output ports are adapted. There are at least two first feed lines, and the heights of the bending vertices of the first feed lines are equal or unequal.
5. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 4, characterized in that: The number of the signal output ports is eight.
6. The miniaturized V-shaped microstrip power divider for traffic radar according to any one of claims 1 or 2, characterized in that: The length of the wavelength matching block is one quarter of the medium wavelength.
7. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 2, characterized in that: The signal input port is connected to a second feeder, the second feeder is connected to a matching section, and the matching section is connected to one of the first feeders.
8. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 7, characterized in that: The matching section is connected to one of the bending vertices of the first feeder lines.
9. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 8, characterized in that: The matching section is connected to the bending vertex of the first feeder line located in the middle.
10. The miniaturized V-shaped microstrip power divider for traffic radar according to claim 1, characterized in that: The microstrip patch antenna array is a 16-unit microstrip patch antenna array.