Microstrip Power Divider

Abstract

The embodiment of the present invention provides a microstrip power divider, which is arranged on the front side of a dielectric substrate, and includes a main feeder and an input end and a multi-channel output end arranged on the main feeder, wherein the input end is extended from the midpoint of the main feeder to one side, and the multi-channel output end is symmetrically arranged on both sides of the input end and is respectively extended from the midpoint of the main feeder to predetermined connection points distributed along the two ends in a direction opposite to the extension direction of the input end. The positions and shapes of the output ends arranged on both sides of the input end are respectively symmetrically arranged relative to the input end, and the amplitude and phase of the output end are gradually decreased from the middle of the main feeder to the two ends in a cosecant square shaping manner. In this embodiment, the amplitude and phase of the output end are gradually weighted from one end of the main feeder to the other end in a cosecant square shaping manner, so as to achieve current and phase weighting of each output end, effectively achieve beam shaping, and effectively achieve a predetermined gain difference.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of microstrip array antennas, and in particular to a microstrip power divider. Background Art

[0002] Existing microstrip array antennas usually include a dielectric substrate, a microstrip power divider and a plurality of radiating line arrays all arranged on the front of the dielectric substrate, and each output end of the microstrip power divider is connected to a corresponding radiating line array and feeds the connected radiating line array. Among them, in order to achieve lane change assistance and blind spot monitoring, the vehicle-mounted microstrip array antenna in the 24GHz frequency band needs to be shaped on the antenna pattern to expand the detection range of the antenna. Generally, two beams for long-range and short-range detection are required within the antenna shaping range, and the gain difference between the two beams is 6dB. However, the structure of the existing microstrip power divider is relatively complex, and it is difficult to achieve the above-mentioned gain difference. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a microstrip power divider with a simple structure and capable of effectively realizing a gain difference.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides the following technical solutions: a microstrip power divider is arranged on the front side of a dielectric substrate, comprising a main feeder and an input end and a multi-way output end arranged on the main feeder, wherein the input end is extended from the midpoint of the main feeder to one side, and the multi-way output ends are symmetrically arranged on both sides of the input end and are respectively extended from the midpoint of the main feeder to predetermined connection points distributed along the two ends in a direction opposite to the extension direction of the input end, and the amplitude and phase of the output end are weighted step by step from one end of the main feeder to the other end in a cosecant square shaping manner.

[0005] Furthermore, the extension length of each output end is weighted step by step from one end of the main feeder to the other end in a cosecant-squared shaping manner.

[0006] Furthermore, each output end is provided with a first bending section, and the terminal connection line of each output end is parallel to the length direction of the main feed line.

[0007] Furthermore, except for the two output ends connected to the two ends of the main feeder line, the other output ends are all provided with a first bending section, and the end connection line of each output end is parallel to the length direction of the main feeder line.

[0008] Furthermore, the bending extension length of the first bending section on each output end is weighted step by step from one end of the main feeder to the other end in a cosecant-squared shaping manner.

[0009] Furthermore, the main feed line between any two adjacent output ends on the same side of the input end is further bent and extended to form a second bending section, and each second bending section is also symmetrically arranged relative to the input end.

[0010] Furthermore, the bending extension length of the second bending section is weighted step by step from one end of the main feeder to the other end in a cosecant-squared shaping manner.

[0011] Furthermore, the sum of the bending extension lengths of the first bending section on the output end adjacent to each second bending section and the input end is weighted step by step from one end of the main feeder to the other end in a cosecant-squared shaping manner.

[0012] Furthermore, the first bending section and the second bending section are both U-shaped.

[0013] Furthermore, ground plates are provided on both sides of the dielectric substrate along the input end, the output end and the main feeder line, and a predetermined gap is formed between the ground plate and the input end, the output end and the main feeder line.

[0014] After adopting the above technical scheme, the embodiment of the present invention has at least the following beneficial effects: the embodiment of the present invention forms an input end by extending from the midpoint of the main feeder to one side, and the predetermined connection points symmetrically arranged on both sides of the input end and distributed along the line from the midpoint of the main feeder to the two ends extend in the direction opposite to the extension direction of the input end to form a multi-channel output end. The structure is relatively simple and occupies a small area. Then, the amplitude and phase of the output end are weighted step by step from one end of the main feeder to the other end in a cosecant square shaping manner to achieve weighting of the current amplitude and phase of each output end, which can effectively realize beam shaping and effectively achieve a predetermined gain difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the planar structure of an optional embodiment of the microstrip power divider of the present invention.

[0016] Figure 2 This is the directional diagram of an optional embodiment of the microstrip power divider of the present invention after connecting to a radiating linear array. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0018] like Figure 1As shown, an embodiment of the present invention provides a microstrip power divider 1, which is arranged on the front side of a dielectric substrate 3, and includes a main feeder 10 and an input terminal 12 and a multi-channel output terminal 14 arranged on the main feeder 10, wherein the input terminal 12 is extended from the midpoint of the main feeder 10 to one side, and the multi-channel output terminals 14 are symmetrically arranged on both sides of the input terminal 12 and are respectively extended from the midpoint of the main feeder 10 to predetermined connection points distributed along the two ends in a direction opposite to the extension direction of the input terminal 12. The amplitude and phase of the output terminal 14 are weighted step by step from one end of the main feeder 10 to the other end in a cosecant square shaping manner.

[0019] The embodiment of the present invention forms an input terminal 12 by extending from the midpoint of the main feeder 10 to one side, and forms a multi-channel output terminal 14 by symmetrically arranging on both sides of the input terminal 12 and extending from the midpoint of the main feeder 10 to the two ends along the predetermined connection points respectively extending in the direction opposite to the extension direction of the input terminal 12. The structure is relatively simple and occupies a small area. Then, the amplitude and phase of the output terminal 14 are weighted step by step from one end of the main feeder 10 to the other end in a cosecant square shaping manner to achieve current and phase weighting of each output terminal 14, which can effectively realize beam shaping and effectively achieve a predetermined gain difference.

[0020] In an optional embodiment of the present invention, the extension length of each output end 14 is weighted step by step in a cosecant square shaping manner from one end to the other end of the main feeder 10. In this embodiment, the cosecant square shaping manner can be effectively implemented by changing the extension length of the first bending section 141, and the current and phase of each output end are weighted to ensure the feeding and beamforming of the microstrip power divider 1.

[0021] In another optional embodiment of the present invention, each output end 14 is provided with a first bending section 141, and the terminal connection line of each output end 14 is parallel to the length direction of the main feeder 10. In this embodiment, by providing the first bending section 141 on each output end 14, and the terminal connection line of each output end 14 is parallel to the length direction of the main feeder 10, the occupied area of ​​the microstrip power divider 1 can be effectively reduced.

[0022] In another optional embodiment of the present invention, the first bending section 141 is provided on all output ends 14 except the two output ends 14 connected to the two ends of the main feeder 10, and the end connection line of each output end 14 is parallel to the length direction of the main feeder 10. In this embodiment, the first bending section 141 is provided on all output ends 14 except the two output ends 14 connected to the two ends of the main feeder 10. In the specific design, according to the actual design situation, the two output ends 14 connected to the two ends of the main feeder 10 do not need to be provided with the first bending section 141, and the first bending section 141 is provided on the other output ends 141, which reduces the design difficulty and lowers the design cost. For example: Figure 1 In the embodiment of the present invention, the microstrip power divider provided in the embodiment of the present invention includes six output terminals in total. At this time, the two output terminals 14 connected to the two ends of the main feed line 10 do not need to be designed with the first bending section 141.

[0023] In another optional embodiment of the present invention, the bending extension length of the first bending section 141 on each output end 14 is weighted step by step from one end to the other end of the main feeder 10 in a cosecant square shaping manner. This embodiment achieves the weighting of the current excitation amplitude and current excitation phase of each output end 14 by changing the bending extension length of the first bending section 141 on each output end 14, which can effectively realize the shaping of the antenna, utilize the lateral size of the dielectric substrate 3, and occupy a relatively small area.

[0024] In another optional embodiment of the present invention, the main feeder line 10 between any two adjacent output ends 14 on the same side of the input end 12 is further bent and extended to form a second bent section 101, and each second bent section 101 is also symmetrically arranged relative to the input end 12. In this embodiment, by arranging the second bent section 101 on the main feeder line 10, the width dimension of the dielectric substrate 3 can be effectively utilized to lay out the main feeder line 10, and the length dimension of the dielectric substrate 3 can be reduced, thereby effectively reducing the occupied area of ​​the dielectric substrate 3, and the main beam and the secondary beam can be very conveniently adjusted in the required direction by adjusting the extension length of the second bent section 101.

[0025] In another optional embodiment of the present invention, the bending extension length of the second bending section 101 is weighted step by step in a cosecant square shaping manner from one end to the other end of the main feeder 10. In this embodiment, the cosecant square shaping manner can also be implemented by changing the length of the second bending section 101, and the current and phase weighting of each output end 14 can also be achieved, which can ensure the feeding and beamforming of the microstrip power divider 1.

[0026] In another optional embodiment of the present invention, the sum of the bending extension lengths of the first bending section 141 on each second bending section 101 and the output end 14 adjacent to the input end 12 is weighted step by step in a cosecant square shaping manner from one end of the main feeder to the other end. This embodiment can also implement the cosecant square shaping manner by jointly adjusting the bending extension lengths of the first bending section 141 and the second bending section 101, so as to achieve current and phase weighting of each output end 14, and also ensure the feeding and beamforming of the microstrip power divider 1. In the specific production design, it can be reasonably selected according to different needs.

[0027] In another optional embodiment of the present invention, the first bending section 141 and the second bending section 101 are both U-shaped. In this embodiment, the first bending section 141 and the second bending section 101 are formed in a U-shape, which has a very simple structure and is more convenient to shape.

[0028] In an optional embodiment of the present invention, grounding plates 16 are further provided on both sides of the input end 12, the output end 14 and the main feeder 10 on the dielectric substrate 3, and a predetermined gap 161 is formed between the grounding plate 16 and each side edge of any part of the input end 12, the output end 14 and the main feeder 10. This embodiment also provides a grounding plate 16, and a predetermined gap 161 is formed between the grounding plate 16 and each side edge of any part of the input end 12, the output end 14 and the main feeder 10, so as to shield the electromagnetic waves, prevent the electromagnetic waves from leaking into the medium during propagation, form a similar microwave cavity, so that the energy can be more concentrated, which is beneficial to increase the gain of the antenna, and also has certain advantages in suppressing the side lobes; in addition, the interference of the leaked electromagnetic waves to the external microwave circuit can be reduced.

[0029] In addition, if Figure 2 The antenna radiation pattern shown in the figure shows that the microstrip array antenna has a shaping range from -80° to 20°, the main beam is at 20°, and its gain is 16.6781dB, and the secondary beam is at -22°, and its gain is 10.5134dB. The gain difference between the main beam and the secondary beam is 6dB, which meets the design requirements. At the same time, the side lobe suppression is -18.27dB, and the overall performance also meets the predetermined requirements.

[0030] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A microstrip power divider, arranged on the front side of a dielectric substrate, comprising a main feeder and an input end and a multi-channel output end arranged on the main feeder, characterized in that: The input end is extended from the midpoint of the main feeder to one side, the multi-channel output ends are symmetrically arranged on both sides of the input end and are respectively extended from the midpoint of the main feeder to predetermined connection points distributed along the two ends in the direction opposite to the extension direction of the input end, and the amplitude and phase of the output end are weighted step by step from one end of the main feeder to the other end in a cosecant square shaping manner; each output end is provided with a first bending section, and the terminal connection line of each output end is parallel to the length direction of the main feeder, or the other output ends except the two output ends connected to the two ends of the main feeder are provided with a first bending section, and each output end is provided with a first bending section. The terminal connection line of the output end is parallel to the length direction of the main feeder; the main feeder between any two adjacent output ends on the same side of the input end is further bent and extended to form a second bent section, and each second bent section is also symmetrically arranged relative to the input end, and the sum of the bent extension lengths of each second bent section and the first bent section on the output end adjacent to the input end is weighted step by step from one end of the main feeder to the other end in a cosecant square shaping manner; grounding plates are also provided on both sides of the dielectric substrate along the line direction of the input end, the output end and the main feeder, and a predetermined gap is formed between the grounding plate and the input end, the output end and the main feeder.

2. The microstrip power divider according to claim 1, characterized in that: The first bending section and the second bending section are both U-shaped.

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