CN112072328A - Feed network unit and antenna array using same - Google Patents
Feed network unit and antenna array using same Download PDFInfo
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- CN112072328A CN112072328A CN202010885716.XA CN202010885716A CN112072328A CN 112072328 A CN112072328 A CN 112072328A CN 202010885716 A CN202010885716 A CN 202010885716A CN 112072328 A CN112072328 A CN 112072328A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
Abstract
The invention discloses a feed network unit and an antenna array applying the same in the field of radar antenna communication. The antenna array comprises phased array units arranged in an array, the phased array units are connected with two feed network units arranged in parallel, and waveguide coaxial converters in the two feed network units are connected with the antenna units together. The invention realizes that different polarizations adopt the same feed structure by improving each component in the phased array unit, thereby ensuring the consistency of the radiation performance of the phased array antenna physically and reducing the loss of a feed circuit.
Description
Technical Field
The invention relates to the field of radar antenna communication, in particular to a feed network unit and an antenna array applying the feed network unit.
Background
With the development of electronic information technology, the multi-band and multi-polarization radar detection is carried out by utilizing the difference of different wave bands and different polarization electromagnetic waves on the scattering characteristics of the target or the ground object, more complete information of the target or the ground object can be obtained, and the target detection and classification and identification capabilities are improved, such as a satellite high-resolution SAR system and a meteorological dual-polarization radar system.
Compared with the conventional single-polarization antenna, the multi-polarization antenna needs to pay more attention to the parameters such as cross polarization, isolation and the like, especially the consistency of the parameters of different polarization radiation patterns besides the performance parameters such as bandwidth, gain, beam width, beam shape, side lobe, efficiency, port voltage standing wave ratio and the like.
The existing dual-polarized one-dimensional phase-scanning antenna is commonly used in the forms of a dual-polarized waveguide slot antenna, a micro-strip dual-polarized antenna and a cross dipole antenna. The bandwidth of the standing wave dual-polarization waveguide slot antenna is related to the network complexity, in a large-size high-gain one-dimensional phase-scanning antenna, the feed network of the standing wave dual-polarization waveguide slot antenna is usually complex, meanwhile, the vertical polarization and the horizontal polarization usually adopt different slot forms, due to the existence of processing errors, beam pointing and beam width of the dual-polarization antenna are inconsistent, beam pointing and beam width in the non-scanning dimension are inconsistent, and the system cannot be corrected.
The dual-polarized microstrip antenna and the cross dipole antenna generally adopt a substrate or an air plate line as a power division and synthesis network, the radar system loss caused by a feeder line can be accepted in a low frequency band such as a C wave band, but in a frequency band above an X wave band, the existing processing technology can not meet the processing precision requirement of a large-size air plate line, and even if some improvement modes are adopted, the loss caused by the feeder line is also generally larger in a large size.
The applicant proposes a feed network unit and an antenna array using the feed network unit to improve the above technical problems.
Disclosure of Invention
The present invention is directed to a feed network unit and an antenna array using the same, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a feed network unit comprises a feed unit and a waveguide coaxial converter, wherein the feed unit comprises a feed waveguide, a bent gap-shaped power coupling structure is arranged on the rear side of the feed waveguide, a phase-shifting unit is coupled through the power coupling structure, a coupling output end is arranged on the rear side of the phase-shifting unit, and the feed network unit is coupled and connected with the waveguide coaxial converter through the coupling output end.
As an improvement of the above technical solution, in order to further compensate for the difference of the insertion phase caused by the power coupling structures with different sizes in the feed waveguide, the left and right side portions of the phase shift unit are both provided with a first phase compensation portion in communication, and the first phase compensation portion is of a step structure or a dielectric insertion structure.
As an improvement of the above technical solution, in order to further compensate for the difference of the insertion phase caused by the power coupling structures with different sizes in the feed waveguide, a second phase compensation portion is provided at the front side of the feed waveguide, the second phase compensation portion is communicated with the inside of the feed waveguide, and the second phase compensation portion is of a step structure or a dielectric insertion structure.
As a modification of the above technical means, in order to make the phase adjustment performance and size suitable, when the first phase compensation portion and the second phase compensation portion have a step structure, the number of step sections is 2.
An antenna array applying feed network units comprises phased array units arranged in an array, wherein each phased array unit comprises an antenna unit and two feed network units arranged in parallel, and waveguide coaxial converters in the two feed network units are connected with the antenna units together; the antenna unit comprises a metal shell, wherein at least three layers of dielectric layers parallel to the inner bottom surface of the metal shell are connected to the inner side wall of the metal shell, the metal shell is divided into at least three cavities by the dielectric layers, a patch antenna microstrip feeder line is arranged on the innermost dielectric layer, and radiation patches are arranged on at least two layers of outer dielectric layers.
As an improvement of the technical scheme, in order to restrain asymmetric high-order resonant electromagnetic fields in the innermost cavity and further improve the isolation and cross polarization level of the antenna port, metal columns are symmetrically distributed on the inner bottom surface of the metal shell.
As an improvement of the above technical solution, in order to maximize performance and beam equalization of the dual-polarized antenna unit, the dielectric layer has three layers, which are a first dielectric layer, a second dielectric layer and a third dielectric layer from outside to inside in sequence, and the first dielectric layer, the second dielectric layer and the third dielectric layer all include dielectric substrates; and the outer side of the dielectric substrate of the third dielectric layer is provided with a metal layer in parallel, and the dielectric substrate of the third dielectric layer is provided with a through hole corresponding to the metal column.
As an improvement of the above technical solution, in order to reduce loss caused by the feed structure, an H-type feed coupling slot is etched on the metal layer, and the patch antenna microstrip feed line is T-shaped.
As an improvement of the above technical solution, in order to facilitate 180 ° phase inversion compensation within a wide band, a coaxial output port of the waveguide coaxial transformer is located at a center position of a rear side of the feed waveguide, and a stepped impedance is provided inside the waveguide coaxial transformer, stepped impedances of two waveguide coaxial transformers in the same phased array unit are in the same direction, and stepped impedances of two waveguide coaxial transformers in adjacent phased array units are in opposite directions.
Has the advantages that: the invention provides a feed network unit and an antenna array, wherein the feed network unit improves the performance of the antenna through a first phase compensation part and a second phase compensation part, the antenna unit is improved in the antenna array, the quality factor of the antenna is reduced by adopting an at least three-cavity structure of a metal shell, the bandwidth of the antenna is widened, and in addition, a metal column can be arranged in the metal shell and is used for inhibiting an asymmetric high-order resonant electromagnetic field in an innermost cavity, and the bandwidth, cross polarization and port isolation indexes of the antenna are improved.
The phased array unit with the same feed structure for different polarizations is improved, the phased array unit with high beam consistency, low cross polarization and high isolation is designed, the consistency of the gain, the beam direction, the beam width and the side lobe level of antennas with different polarizations is ensured, the consistency of the gain, the beam width and the side lobe level of the antennas with different polarizations is further improved, and the loss caused by a feed line is reduced.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a feed cell of the present invention;
fig. 2 is a schematic view of another embodiment of a feed unit according to the invention;
FIG. 3 is a schematic diagram of an antenna array of the present invention;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a cross-sectional view of an antenna unit according to the present invention;
FIG. 6 is a schematic view of an antenna unit of the present invention at an angle without a metal housing;
FIG. 7 is a schematic view of another embodiment of the antenna unit of the present invention without a metal housing;
FIG. 8 is a schematic diagram of a waveguide coaxial converter according to the present invention;
fig. 9 is an antenna element radiation pattern of the present invention;
fig. 10 is a graph of S-parameters of the antenna unit of the present invention.
In the figure: 1-a feeding unit; 101-a feed waveguide; 102-a first phase compensation section; 103-a second phase compensation section; 104-a phase shift unit; 105-a coupled output; 106-power coupling structure; 2-an antenna element; 201-a metal housing; 202-a first dielectric layer; 203-a second dielectric layer; 204-a third dielectric layer; 205-metal posts; 206-a metal layer; 207-a through hole; 208-a radiating patch; 209-a feed coupling gap; 210-patch antenna microstrip feed line; 3-waveguide coaxial converters; 301-step impedance; 302-coaxial output port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, referring to fig. 1, a feeding network unit includes a feeding unit 1 and a waveguide coaxial converter 3, where the feeding unit 1 includes a feeding waveguide 101, a power coupling structure 106 in a shape of a bent slot is disposed on a rear side of the feeding waveguide 101, and is coupled with a phase shifting unit 104 through the power coupling structure 106, and a coupling output end 105 is disposed on a rear side of the phase shifting unit 104 and is coupled with the waveguide coaxial converter 3 through the coupling output end 105. .
The power coupling structure 106 is usually coupled by a circular hole or a rectangular slot, in this embodiment, the power coupling structure 106 is in a bent form, such as a bent shape of S, Z, N, H, the bent slot-shaped power coupling structure is used to increase the power division ratio range thereof, improve the frequency width of the coupling performance thereof, and the coupling degree of the power coupling structure 106 can be adjusted by controlling the total length of the bent slot.
Preferably, in this embodiment, the slot width of the power coupling structure 106 is 1 mm.
Because the power coupling structure 106 is in a shape of a bending slit and is a non-resonant structure, the left and right sides of the phase shift unit 104 are both communicated with the first phase compensation part 102, the first phase compensation part 102 is in a step structure or a dielectric insertion structure and is arranged on the broadside side of the phase shift unit 104, and the first phase compensation part 102 compensates for extra insertion phase shift brought by the power coupling structure.
Alternatively, in this embodiment, the feeding waveguide 101 is a guided wave of the feeding unit 1, and may be a strip line, a ridge waveguide, or other forms.
Preferably, in this embodiment, to increase the scanning angle of the phased array antenna, the feed unit 1 adopts a low-profile waveguide form, the feed waveguide 101 is a nonstandard half-height waveguide form, a wide side of the feed waveguide meets the requirement of single-mode transmission, a narrow side of the feed waveguide adopts a nonstandard waveguide structure, and a thickness of the narrow side is less than 0.5 times that of the standard waveguide.
Preferably, in this embodiment, the length of the wide side of the feed waveguide 101 is 22.86mm, and the length of the narrow side is 5 mm.
Alternatively, the coupling output terminal 105 has other guiding structure in the low frequency band, and adopts a waveguide structure in the X band and above to reduce the feeder loss. In this embodiment, the coupling output terminal 105 is disposed in the middle of the narrow side of the phase shift unit 104.
Alternatively, as shown in fig. 8, the coaxial output port 302 of the waveguide coaxial converter 3 is located at the right center position of the rear side of the feed waveguide 101, and the waveguide coaxial converter 3 is internally provided with a stepped impedance 301. The stepped impedance 301 is a guided wave form conversion structure to realize the conversion from waveguide to coaxial, or may be other conversion forms from wave to microstrip, strip line, coplanar waveguide, etc., and the coaxial output port 302 is designed in the center of the narrow side of the waveguide to ensure the output port is in the same structural position.
In embodiment 2, in addition to embodiment 1, the second phase compensation portion 103 is provided on the front side of the feed waveguide 101, and the second phase compensation portion 103 communicates with the inside of the feed waveguide 101. The second phase compensation portion 103 is used to adjust the difference of the insertion phase caused by the different sizes of the bending slots of the power coupling structure 106 in the feed waveguide 101, and also plays a role in impedance matching of the feed waveguide 101.
In this embodiment, the second phase compensation portion 103 has a step structure or a dielectric insertion structure, and can be used to realize a phase shift function, and adjust the transmission phase of the electromagnetic wave by changing the transmission characteristics of the electromagnetic wave in the conductive structure. By adjusting the width between the left and right sides of the feed waveguide 101, the first phase compensation unit 102 and the second phase compensation unit 103 are indirectly adjusted, so that the consistency between each relevant index of the antenna and the design can be ensured.
Embodiment 3, fig. 1 shows an implementation structure of a feeding unit. In this embodiment, the power coupling structure 106 is a Z-shaped bent slit, and optionally, the first phase compensation portion 102 and the second phase compensation portion 103 are both of a step structure.
The first phase compensation portion 102 is represented by two sets of symmetrical and relatively decreasing steps as shown in fig. 1, or two sets of symmetrical and relatively increasing steps, so as to compensate for an extra phase deviation in the main waveguide caused by the power coupling structure 106 used for the side lobe amplitude weighting.
Optionally, the number of step sections of each two sets of steps is at least one, and the larger the number of step sections is, the better the performance of phase compensation is, and the larger the size of the phase compensation is.
Preferably, the number of step sections of the two sets of steps of the first phase compensation portion 102 is 2.
Wherein, the second phase compensation part 103 is in a step shape which is decreased or increased from the middle part to the left and right sides of the feed waveguide 101. However, the size of the second phase compensation portion 103 is increased by adopting the incremental form, which increases the processing difficulty.
Alternatively, the number of the step sections on both sides of the second phase compensation portion 103 is at least one, and the larger the number of the step sections is, the better the phase compensation performance is, and the larger the size thereof is.
Preferably, the number of the step sections on both sides of the second phase compensation portion 103 is 2, and the performance is good, the size is small, and the relative optimization is realized.
Embodiment 4, fig. 2 shows another implementation structure of the feeding unit. In this embodiment, the power coupling structure 106 employs an H-shaped bending gap, and the coupling degree is different from the flatness of the Z-shaped bending gap at different frequencies. Optionally, the first phase compensation portion 102 and the second phase compensation portion 103 are both of a step structure.
Wherein the first phase compensation part 102 presents a set of steps descending towards the feed waveguide 101.
Optionally, the number of step sections of the set of steps is at least one, and the larger the number of step sections is, the better the performance of phase compensation is, and the larger the size of the phase compensation is.
Preferably, the number of the set of steps is 2, and the performance is good, the size is small, and the relative optimization is realized.
The second phase compensation portion 103 is in a step shape which increases from the middle symmetrically to the left and right sides of the feed waveguide 101.
When the first phase compensation portion 102 and the second phase compensation portion 103 have a step structure, the number of steps is 2.
Alternatively, the number of the step sections on both sides of the second phase compensation portion 103 is at least one, and the larger the number of the step sections is, the better the phase compensation performance is, and the larger the size thereof is.
Preferably, the number of the step sections on both sides of the second phase compensation portion 103 is 2, and the performance is good, the size is small, and the relative optimization is realized.
Referring to fig. 3-4, an antenna array comprises phased array units arranged in an array, wherein each phased array unit comprises an antenna unit 2 and two feed network units arranged in parallel, and waveguide coaxial converters 3 in the two feed network units are connected with the antenna unit 2 together; the antenna unit 2 includes a metal casing 201, at least three layers of dielectric layers parallel to the inner bottom surface of the metal casing 201 are connected to the inner side wall of the metal casing 201, the metal casing 201 is divided into at least three cavities by the dielectric layers, wherein a patch antenna microstrip feeder 210 is arranged on the innermost dielectric layer, and radiation patches 208 are arranged on at least two layers of outer dielectric layers.
As shown in fig. 4, in the phased array unit, one group of antenna units corresponds to two feed network units and one antenna unit, in the same phased array unit, the stepped impedances 301 of the waveguide coaxial converters 3 of the two feed network units are in the same direction, and in the two adjacent phased array units, the stepped impedances 301 of the waveguide coaxial converters 3 are in the opposite direction. The stepped impedance 301 of the waveguide coaxial converter 3 is in the same direction along with the odd-even array sequence of the antenna unit in the phased array unit, the phase inconsistency brought by the feed waveguide 101 is realized by rotating the ports of the odd-numbered phased array unit and the even-numbered phased array unit by 180 degrees, the phase compensation of the half-wavelength broadband is realized by 180 degrees in the series feed structure, the extra unnecessary phase error brought by the feed network unit is compensated, meanwhile, the whole structure of the antenna is simplified, and the cross polarization level of the antenna is further reduced.
The feeding network units with different polarizations adopt symmetrical design, the feeding network units adopt the same guided wave structure, and the feeding waveguide 101 array in the feeding unit 1 of the phased array unit forms a feeding guided wave system.
The feed network units of the different polarized antenna units 2 adopt the same structural process processing technology, so that the processing errors are reduced as much as possible, if errors exist, the same processing errors of the feed structure of the dual-polarized antenna can be ensured, and the influences on the dual-polarized electrical property are consistent.
In addition, the number of cavities inside the antenna unit is usually two, which makes it difficult to ensure the beam uniformity of the antenna unit. In this embodiment, there are at least three cavities, the innermost cavity is surrounded by the innermost dielectric layer and the inner sidewall and the inner bottom surface of the metal shell 201, and is called as a reflective cavity, and the other cavities are called as radiation cavities. When the number of the cavities is three or more, the quality factor of the antenna can be reduced, and the bandwidth of the antenna is widened.
In embodiment 5, referring to fig. 5, metal posts 205 are symmetrically distributed on the inner bottom surface of the metal housing 201, and the metal posts 205 are located in the reflective cavity, so that an asymmetric high-order resonant electromagnetic field in the reflective cavity can be suppressed, and the isolation and cross polarization level of the antenna port can be further improved.
Preferably, referring to fig. 6 to 7, in this embodiment, the dielectric layer has three layers, which are a first dielectric layer 202, a second dielectric layer 203 and a third dielectric layer 204 from outside to inside in sequence, and the first dielectric layer 202, the second dielectric layer 203 and the third dielectric layer 204 all include dielectric substrates; the outer side of the dielectric substrate of the third dielectric layer 204 is provided with a metal layer 206 in parallel, and the dielectric substrate of the third dielectric layer 204 is provided with a through hole 207 corresponding to the metal column 205.
When the dielectric layers are three layers, the third dielectric layer 204, the inner side wall and the inner bottom surface of the metal shell 201 enclose to form a reflecting cavity, the third dielectric layer 204, the second dielectric layer 203 and the inner side wall of the metal shell 201 form a first radiating cavity, the second dielectric layer 203, the first dielectric layer 202 and the inner side wall of the metal shell 201 can form a second radiating cavity, and when the three cavities exist, the antenna unit can reduce the quality factor of the antenna to the maximum extent, broaden the bandwidth of the antenna and improve the performance.
In this embodiment, the via 207 is used to connect the metal pillar 205 and the metal layer 206.
Optionally, the radiation patch 208 is selectively disposed on the first side or the second side of the dielectric substrate of the first dielectric layer 202 and the second dielectric layer 203, using the dielectric substrate as a carrier.
Preferably, the metal layer 206 is etched with an H-shaped feeding coupling slot 209 for reducing the feeding structure, and the patch antenna microstrip feeding line 210 is T-shaped.
Fig. 9-10 are graphs of radiation patterns and S parameters of the antenna unit of the present invention, respectively, and it can be seen from the graphs that the present invention can ensure the uniformity of gain, beam direction, beam width, and side lobe level of antennas with different polarizations, further improve the uniformity of gain, beam width, and side lobe level of antennas, and reduce the loss caused by feeding lines.
In addition, the amplitude-phase weighting of the phased array unit can be optimized through optimization algorithms such as particle swarm optimization, genetic algorithm and the like, the consistency of all parameters of radiation patterns of different polarized antennas of the phased array antenna is guaranteed to the maximum extent, the dual-polarized antenna system is externally calibrated, and the system parameters are corrected through antenna near-field test data, so that the consistency of gain, beam width, beam pointing and side lobe level of the different polarized antennas of the dual-polarized radar is further improved.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
In the description of the present invention, it should be noted that relational terms such as first and second, and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be further noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, which are merely for convenience of description and simplification of description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A feed network unit comprises a feed unit (1) and a waveguide coaxial converter (3), wherein the feed unit (1) comprises a feed waveguide (101), and is characterized in that a bent slot-shaped power coupling structure (106) is arranged on the rear side of the feed waveguide (101), a phase shift unit (104) is coupled through the power coupling structure (106), and a coupling output end (105) is arranged on the rear side of the phase shift unit (104) and is coupled with the waveguide coaxial converter (3) through the coupling output end (105).
2. The feed network element according to claim 1, wherein the coaxial output port (302) of the waveguide coaxial converter (3) is located at the center of the rear side of the feed waveguide (101), and the waveguide coaxial converter (3) is internally provided with a stepped impedance (301).
3. The feeding network unit according to claim 2, wherein the left and right sides of the phase shifting unit (104) are communicated with a first phase compensation part (102), and the first phase compensation part (102) has a step structure or a dielectric insertion structure.
4. The feed network element according to claim 3, wherein a second phase compensation portion (103) is provided at the front side of the feed waveguide (101), the second phase compensation portion (103) is communicated with the interior of the feed waveguide (101), and the second phase compensation portion (103) is of a step structure or a dielectric insertion structure.
5. The feed network element according to claim 4, wherein when said first phase compensation unit (102) and said second phase compensation unit (103) are of a stepped structure, the number of steps is 2.
6. An antenna array applying the feeding network elements as claimed in any of claims 2-5, comprising phased array elements arranged in an array, characterized in that the phased array elements comprise antenna elements (2) and two feeding network elements arranged in parallel, the waveguide coaxial converters (3) of the two feeding network elements being connected to the antenna elements (2) in common; the antenna unit (2) comprises a metal shell (201), at least three layers of dielectric layers parallel to the inner bottom surface of the metal shell (201) are connected to the inner side wall of the metal shell (201), the metal shell (201) is divided into at least three cavities by the dielectric layers, patch antenna microstrip feeder lines (210) are arranged on the innermost dielectric layer, and radiation patches (208) are arranged on at least two layers of outer dielectric layers.
7. An antenna array according to claim 6, characterized in that the stepped impedance (301) of two waveguide coaxial transformers (3) in the same phased array unit is in the same direction, and the stepped impedance (301) of the waveguide coaxial transformers (3) in two adjacent phased array units is in the opposite direction.
8. An antenna array according to claim 6, characterized in that the metal posts (205) are symmetrically distributed on the inner bottom surface of the metal shell (201).
9. The antenna array of claim 8, wherein the dielectric layers are three layers, namely a first dielectric layer (202), a second dielectric layer (203) and a third dielectric layer (204) from outside to inside, and the first dielectric layer (202), the second dielectric layer (203) and the third dielectric layer (204) comprise dielectric substrates; and a metal layer (206) is arranged on the outer side of the dielectric substrate of the third dielectric layer (204) in parallel, and a through hole (207) is formed in the dielectric substrate of the third dielectric layer (204) corresponding to the metal column (205).
10. An antenna array according to claim 9, characterized in that the metal layer (206) is etched with H-shaped feed coupling slots (209) and the patch antenna microstrip feed lines (210) are T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010885716.XA CN112072328A (en) | 2020-08-28 | 2020-08-28 | Feed network unit and antenna array using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010885716.XA CN112072328A (en) | 2020-08-28 | 2020-08-28 | Feed network unit and antenna array using same |
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| CN112072328A true CN112072328A (en) | 2020-12-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725686A (en) * | 2022-05-17 | 2022-07-08 | 安徽大学 | Log-periodic antenna based on half-mode rectangular metal waveguide excitation |
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2020
- 2020-08-28 CN CN202010885716.XA patent/CN112072328A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725686A (en) * | 2022-05-17 | 2022-07-08 | 安徽大学 | Log-periodic antenna based on half-mode rectangular metal waveguide excitation |
| CN114725686B (en) * | 2022-05-17 | 2024-03-12 | 安徽大学 | Logarithmic periodic antenna based on half-module rectangular metal waveguide excitation |
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