Reducible power division network structure and antenna system

Abstract

The invention discloses a power division network structure capable of being reduced and an antenna system, and relates to the technical field of power division networks, and the power division network structure is characterized in that during sparse arrangement or full-array corner cutting arrangement, the tail end of a network of a non-feed part is disconnected, a matched load embedded resistor is connected, and the matched load embedded resistor is connected with an open-circuit transmission line; meanwhile, the network is further reduced through the snakelike strip line. According to the invention, the problems of inconsistent phases of output ports and redundant network occupied space of non-feed radio frequency components caused by corner cutting arrangement or sparse arrangement in the existing power division network technology are solved, so that the size of the radio frequency part of the antenna is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power division networks, and in particular to a reducible power division network structure and an antenna system. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] The power division network is an important component of the phased array antenna, usually composed of multiple cascades of Wilkinson power dividers, and is used for signal transmission in the antenna system. For a 2n*2n (n is an integer) full array antenna system, when amplitude weighting is not required, it is usually sufficient to cascade a one-to-two power divider that meets the equal division requirement and ensure that the paths of each port are consistent to meet the amplitude and phase consistency requirements. It should be noted that the network terminal can be a T / R component, an antenna subarray, or an antenna unit.

[0004] In actual engineering, there are requirements for the grating lobes of the antenna system, the density of the T / R components, power consumption and other indicators. When arranging the antenna array, methods such as array cutting angle and sparse array are usually adopted. The existing technology has the following treatment measures for different array situations: 1. For a 2n*2n (n is an integer) full array antenna system, it is relatively easy to obtain a power division network with consistent amplitude by simply cascading the designed one-to-two power divider; 2. For antenna systems that do not meet the 2n*2n (n is an integer) array arrangement, array cutting angle or sparse array array antenna systems, loads are often added to replace the post-stage power division network structure, and after matching the loads, they are directly grounded or connected to an open transmission line for matching to obtain a power division network with consistent amplitude.

[0005] Disadvantages of existing power division network technology:

[0006] 1. When the array antenna layout does not meet 2n*2n (n is an integer), there will be obvious amplitude and phase inconsistency at the end of the network, and the method of directly grounding the matching load instead of the subsequent network is not an ideal match, and it is quite different from the actual load: T / R components, antenna subarrays, or antennas;

[0007] 2. Even if an external open-circuit transmission line is used to achieve matching or control the amplitude and phase difference within a certain range, it is still impossible to reduce the spatial redundancy occupied by the previous-stage network. Summary of the invention

[0008] The purpose of the present invention is to provide a reducible power division network structure and antenna system to solve the phase inconsistency problem in the prior art and reduce the spatial redundancy of the network.

[0009] The technical solution of the present invention is as follows:

[0010] A reducible power division network structure, comprising:

[0011] When the array is sparsely arranged or the full array is arranged with a cut corner, the network end of the unfed part is disconnected and connected to a matching load buried resistor, which is then connected to the open transmission line.

[0012] Furthermore, the ends of the reduced network are connected via a serpentine stripline, wherein a matching load and an open transmission line are connected to the serpentine stripline, thereby further reducing the network.

[0013] The present invention also proposes an antenna system, including the above-mentioned power division network structure, wherein signal transmission and function realization are achieved between the power division network structure and the antenna system through one or more combinations of T / R components, transmission lines or through holes.

[0014] Furthermore, the antenna system is one or more of a receiving antenna system and a transmitting antenna system.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The power division network structure scheme adopted in the present invention realizes the phase consistency of the output port of the power division network by finely processing the length of the open-circuit transmission line, the serpentine strip line winding method and the winding length.

[0017] 2. The power division network structure scheme adopted in the present invention can effectively reduce the spatial redundancy of the unfed part in non-full array situations such as sparse array and corner array, so as to effectively reduce the size of the power division network structure and the antenna system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a 24*24 256-way power division network in the prior art, 96-way network is connected to the RF components, and the rest are not fed. The RF components represented by the boxes may be antenna units, antenna subarrays, and T / R components;

[0019] Figure 2 It is a schematic diagram of reducing a 256-way power splitter network to a 96-way network, with unfed network splitters plus matched loads and open transmission lines;

[0020] Figure 3 The schematic diagram of the 96-way network after being reduced by the serpentine stripline;

[0021] Figure 4 for Figure 3 A schematic diagram of a three-stage power division network of the reduced portion is shown;

[0022] Figure 5 for Figure 3 Schematic diagram of the amplitude characteristics of the output port of the network shown;

[0023] Figure 6 for Figure 3 Schematic diagram of the phase characteristics of the output port of the network shown. DETAILED DESCRIPTION

[0024] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] Embodiment 1

[0027] A reducible power division network structure, comprising:

[0028] When the array is sparsely arranged or the full array is arranged at an angle, the network end of the unfed part is disconnected and connected to a matching load to bury the resistor to reduce energy reflection; the matching load is buried and connected to the open transmission line; it should be noted that the power division network includes: Wilkinson power divider, matching load, network connection component, RF component, serpentine strip line; the input port of the sub-network is connected to the upper-level network through the network connection component; the upper-level network of all networks is a 1-to-2 Wilkinson power divider, and the input port of the first-level power divider is the network input total port; the RF component can be an antenna, a T / R component, an antenna sub-array, etc.;

[0029] In this embodiment, specifically, the ends of the reduced network are connected via a serpentine stripline, wherein a matching load and an open transmission line are connected to the serpentine stripline, further reducing the network; the serpentine stripline is used to achieve the same equivalent path from the network to the antenna unit, antenna subarray or T / R component, etc.;

[0030] That is, after the signal passes through the serpentine strip line, the port amplitude and phase consistency of the signal reaching the antenna unit, antenna subarray or T / R component is achieved, or the amplitude and phase difference are controlled within a certain range; the serpentine strip line can limit the network strip line in the space and reduce the space occupied by the power division network strip line; the serpentine strip line is used to reduce the space occupied by unfed or unarrayed RF components.

[0031] Specifically, for 2 n *2 n (n is an integer) full array antenna system, only needs to perform network cascading according to the required scale. For array antenna arrangement that does not meet 2 n *2 n (n is an integer), the phase consistency of the network output port is achieved by matching the load, open transmission line, and serpentine stripline, while the network space redundancy is reduced.

[0032] Embodiment 2

[0033] It should be noted that the specific implementation of the present invention is not limited to this case, and the power division network reduction scheme is still effective in other non-full array situations such as sparse arrays and corner arrays.

[0034] The following is based on the full array network. Since the network is large and difficult to display, only part of the network structure is shown here, such as Figure 1 As shown, it is not general. Taking a 24*24 256-way power division network as an example, the rectangular box part shown is the RF component, which can be one or a combination of antennas, antenna subarrays or T / R components. The end of the network without a rectangular box represents an unfed position.

[0035] In this embodiment, only 96 networks need to be fed, which is not sufficient for a 2n*2n (n is an integer) full array antenna system. There is load mismatch and distribution imbalance at the end of the network.

[0036] In view of the above example, there are problems of amplitude and phase inconsistency in the output power at the end of the power division network and a large amount of spatial redundancy in the power division network.

[0037] In view of the above problems, this embodiment proposes the following technical solutions:

[0038] like Figure 2 As shown, the network end of the un-powered part is connected to a matching load in the form of a 50-ohm buried resistor, and an open-circuit transmission line is connected after the buried resistor. The length of the transmission line is refined by electromagnetic simulation software to achieve amplitude and phase consistency of the port.

[0039] Only by terminating the matched load and opening the transmission line, there is still some network space redundancy, such as Figure 3 As shown, further network reduction is accomplished using two serpentine striplines.

[0040] Take the reduction of one of the serpentine stripline networks as an example. Figure 4As shown, Port 1 is the input port, and after three-level power division, the power is output through Port 2 and Port 3. The purpose of the serpentine stripline is to ensure the same signal path while reducing the size of the network space. The purpose is to ensure the consistency of the amplitude and phase of the ports reaching the antenna unit, antenna subarray or T / R components after passing through the serpentine stripline, or to control the amplitude and phase difference within a certain range.

[0041] With the help of electromagnetic simulation software, the refined parameter design was carried out and the Figure 3 , Figure 4 The network structure in the embodiment of the present invention, wherein the refined parameter design includes optimizing the length of the open transmission line, the length of the serpentine strip line, the winding method, the cutting angle size, etc.

[0042] like Figure 5 As shown in the figure, the power amplitude of the output port of the power division network structure after refined parameter design is consistent within the frequency band, as shown in the figure. Figure 6 As shown in the figure, the output port phase of the power division network after refined parameter design maintains good consistency within the frequency band.

[0043] The above embodiments illustrate that the present invention can effectively reduce the size and structure of the power division network while ensuring the amplitude and phase consistency of the network output ports.

[0044] Embodiment 3

[0045] This embodiment also proposes an antenna system, including the above-mentioned power division network structure, wherein the power division network structure and the antenna system complete signal transmission and function realization through one or more combinations of T / R components, transmission lines or through holes.

[0046] In this embodiment, it should be noted that the antenna system is one or more of a receiving antenna system and a transmitting antenna system.

[0047] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0048] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A reducible power division network structure, characterized in that: include: When the array is sparsely arranged or the full array is arranged with a cut corner, the network end of the unfed part is disconnected and connected to a matching load buried resistor, which is then connected to the open transmission line.

2. A reducible power division network structure according to claim 1, characterized in that: The ends of the reduced network are connected via a serpentine stripline, wherein a matched load and an open transmission line are connected to the serpentine stripline to further reduce the network.

3. An antenna system, comprising the power division network structure according to claim 1 or 2, characterized in that: The power division network structure and the antenna system complete signal transmission and function realization through one or more combinations of T / R components, transmission lines or through holes.

4. An antenna system according to claim 3, characterized in that: The antenna system is a receiving antenna system.

5. The antenna system according to claim 3, characterized in that: The antenna system is a transmitting antenna system.

6. The antenna system according to claim 3, characterized in that: The antenna system includes: a receiving antenna system and a transmitting antenna system.

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