CN115911838A - Broadband common-mode absorption differential feed type dual-mode patch antenna and antenna array - Google Patents
Broadband common-mode absorption differential feed type dual-mode patch antenna and antenna array Download PDFInfo
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Abstract
The invention discloses a broadband common-mode absorption differential feed type dual-mode patch antenna and an antenna array, wherein the dual-mode patch antenna comprises an upper-layer dielectric substrate, a lower-layer dielectric substrate and a three-layer metal structure; from top to bottom, the three layers of metal structures are sequentially a radiation patch, a common metal stratum and a differential feed network; the radiation patch is provided with a step width, so that the radiation patch has a dual-mode radiation characteristic; a T-shaped coupling aperture is etched on the common metal layer to enhance the electromagnetic coupling between the differential feed network and the radiation patch; the differential feed network comprises a dual-port differential network and an absorption branch node loaded on a middle symmetrical plane along the signal input direction; the absorption branch section is formed by sequentially cascading a metalized short-circuit through hole, a quarter-wavelength short-circuit branch section, an absorption resistor and a connecting branch section along the signal input direction. And linear and planar arrays based on the dual-mode patch antenna. The broadband common-mode filter has the advantages of broadband common-mode absorption, relatively wide working bandwidth, high gain, good gain filtering characteristic and the like.
Description
Technical Field
The invention belongs to the technical field of differential feed type antennas, and particularly relates to a broadband common-mode absorption differential feed type dual-mode patch antenna and an antenna array.
Background
With the development of modern wireless communication technology, the antenna, as an important rf front-end device, is rapidly developing in the direction of miniaturization, multifunction, easy integration with a system, and the like. Differential feed technology is widely used in the design of microwave devices (such as filters, antennas, etc.) and high-speed digital electronic circuits because of its advantages of noise immunity, crosstalk immunity, and low electromagnetic interference. Compared with the traditional single-port feed antenna, the antenna designed based on the differential feed technology generally has the advantages of low cross polarization, suppression of even harmonics, electromagnetic interference resistance and easy integration with a differential circuit. Therefore, designing a high-performance differential antenna has become one of the hot spots in recent years.
At present, the existing differential feed antenna can be divided into a microstrip patch antenna, a dielectric resonator antenna, a magnetoelectric dipole antenna, a slot antenna, and the like according to a radiation unit. The differential microstrip patch antenna and the dielectric resonator antenna designed based on the multimode theory can solve the problem of narrow working bandwidth caused by high-Q-value cavity resonance, and improve the antenna gain while widening the working bandwidth of the antenna. In addition, the magnetoelectric dipole antenna, the cavity-backed slot antenna and the like designed based on the differential feed technology have excellent dual-polarization characteristics, can enhance the channel capacity of a wireless communication system, and reduce the multipath fading of signals. However, the above-mentioned differential feed antennas have poor common mode rejection performance while achieving excellent differential mode radiation characteristics.
Common mode rejection characteristics are a design challenge for any balanced device because of the inevitable introduction of imbalance factors in an actual circuit or system, such as: asymmetry of the differential wiring, imbalance of the differential signals (unequal rise and fall times, inconsistent amplitude and phase), and the like, which may cause some useful differential signals to be converted to common mode noise. For differential antennas, the introduction of common mode noise can reduce the antenna cross-polarization level, produce uncertain common mode radiation, and interfere with effective differential mode radiation. Therefore, good common mode rejection characteristics are also critical for differential antennas.
Two common mode rejection methods are available, the first method is to cascade a common mode filter in the front stage circuit of the differential antenna, but this inevitably reduces the system integration level and introduces extra loss; the second is to design a differential antenna with common mode rejection characteristics. Currently, slot antennas designed based on differential feed technology have intrinsic common mode rejection characteristics. The common mode rejection is achieved by mode mismatch between the slot resonant mode with odd symmetry properties and the common mode signal. However, the common-mode rejection performance of such differential slot antennas is based on the reflection mechanism. When such an antenna is integrated with a differential circuit or system, the reflected common-mode signal (noise) returns to the front-stage circuit of the antenna, thereby affecting the normal operation of the front-stage circuit or system. It can be said that the slot antenna designed based on the differential feed technique does not completely solve the problem of common mode interference. Therefore, the differential antenna with broadband common-mode absorption performance and used for thoroughly solving the common-mode interference problem has important practical application value.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a broadband common-mode absorbing differential feeding dual-mode patch antenna and an application thereof in an antenna array, aiming at the deficiencies of the prior art, wherein the broadband common-mode absorbing differential feeding dual-mode patch antenna has broadband common-mode absorbing performance, dual-mode radiation characteristic, relatively wide bandwidth and high gain.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the broadband common-mode absorption differential feed type dual-mode patch antenna comprises an upper dielectric substrate, a lower dielectric substrate and three layers of metal structures;
from top to bottom, the three layers of metal structures are sequentially a radiation patch, a common metal stratum and a differential feed network;
the radiation patch is positioned on the upper surface of the upper-layer dielectric substrate, and the step width is set so that the radiation patch has a dual-mode radiation characteristic;
the common metal layer is positioned on the upper surface of the lower dielectric substrate, and a T-shaped coupling aperture is etched on the common metal layer so as to enhance the electromagnetic coupling between the differential feed network and the radiation patch;
the differential feed network is positioned on the lower surface of the lower-layer dielectric substrate and comprises a dual-port differential network and an absorption branch node loaded on a middle symmetrical plane along the signal input direction;
the absorption branch section is formed by sequentially cascading a metalized short-circuit through hole, a quarter-wavelength short-circuit branch section, an absorption resistor and a connecting branch section along the signal input direction.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the radiation patches sequentially comprise a first rectangular patch, a second rectangular patch and a third rectangular patch;
the widths of the first rectangular patch and the third rectangular patch on the two sides are larger than the width of the second rectangular patch in the middle, so that the radiating patch has dual-mode radiation characteristics.
And the T-shaped coupling aperture is etched on the middle symmetrical plane of the common metal stratum along the signal input direction.
The coupling aperture is symmetrical about a middle symmetrical plane in the signal input direction and is composed of a groove along the signal input direction and a groove perpendicular to the signal input direction;
the grooves along the signal input direction are rectangular or grooves with step width or other shapes symmetrical about the middle symmetrical plane of the signal input direction;
the grooves perpendicular to the signal input direction are rectangular or meander-shaped or other shapes symmetrical about a mid-plane of symmetry of the signal input direction.
The ends of the quarter-wave short circuit branches are shorted to the common metal ground layer through the metalized short circuit through holes.
The differential antenna linear array comprises a 1 multiplied by 4 unit, and comprises a radiation unit linear array, an upper medium substrate, a common metal ground layer, a lower medium substrate and a differential power division feed network, wherein the radiation unit linear array consists of 4 radiation patches from top to bottom;
the common metal ground layer and the upper medium substrate are bonded through the bonding layer and used for lamination processing;
4T-shaped coupling apertures are etched on the common metal layer to form a coupling aperture straight line array so as to realize electromagnetic coupling between the differential power division feed network and the radiation unit straight line array;
the differential power division feed network applied to the antenna linear array is formed by two identical 1-to-4 power division networks which are oppositely connected in a central rotational symmetry mode and 4 absorption branch nodes loaded on a middle symmetry plane;
the planar array of the differential antenna with 2 x 4 units comprises a planar array of radiating elements consisting of 8 radiating patches, an upper dielectric substrate, a common metal ground layer, a lower dielectric substrate and a differential power division feed network applied to the planar array of the antenna from top to bottom;
the common metal ground layer and the upper medium substrate need to be bonded by an adhesive layer for lamination processing;
8T-shaped coupling apertures are etched on the common metal layer to form a coupling aperture planar array so as to realize electromagnetic coupling between the differential power division feed network and the radiating element planar array;
the differential power division feed network applied to the antenna planar array is formed by two identical 1-to-8 power division networks which are oppositely connected according to a central rotation symmetry mode and 8 absorption branch nodes loaded on corresponding symmetry planes.
The invention has the following beneficial effects:
the invention discloses a differential feed type dual-mode patch antenna with broadband common-mode absorption performance, and an antenna linear array and an antenna planar array are designed based on the antenna, compared with the prior art:
1) For the differential feed network, in the odd-mode working state, the middle symmetrical plane is equivalent to an ideal electric wall, so that the absorption branch section has no influence on the normal radiation of a differential-mode signal; in the working state of the even mode, the middle symmetrical plane is equivalent to an ideal magnetic wall, so the feed network is equivalent to a resonance absorption circuit, the high-efficiency absorption of common mode noise in a wide frequency band range between a quarter-wavelength main mode and a high-order resonance mode can be realized, and the problem of common mode interference is solved more thoroughly. This is a characteristic that existing differential feed antennas and arrays do not have.
2) The invention has the design of the radiation patch with the step width and the T-shaped coupling aperture, wherein the design of the step width of the radiation patch can ensure the TM of the patch resonant cavity 01 And TM 11 The two resonance modes are close to each other in the frequency domain, so that the antenna has a dual-mode radiation characteristic, the working bandwidth of the antenna is widened, and the gain is improved; the part of the T-shaped coupling aperture perpendicular to the signal input direction can enhance the electromagnetic coupling between the differential feed network and the radiation patch, thereby widening the working bandwidth of the antenna. In addition, the antenna and array exhibit good gain filtering characteristics.
3) The feed network of the antenna linear array with 1 × 4 units and the antenna planar array with 2 × 4 units provided by the invention can be regarded as formed by connecting two identical 1-to-4 or 1-to-8 power dividers in a central rotation symmetry manner. Therefore, when the same-amplitude and opposite-phase differential signals are fed into the two input ports, a 1 × 4 linear array or a 2 × 4 planar array of differential signals can be generated on the symmetrical plane of the power divider, and the corresponding radiating elements are correspondingly excited. The design principle of the differential feed network has important application value in the differential antenna array.
Drawings
Fig. 1 is a schematic 3-dimensional stacking diagram of a differential feeding type dual-mode patch proposed by the present invention;
fig. 2 is a top view of the differential feeding type dual-mode patch proposed by the present invention;
FIG. 3 is a schematic diagram of a common metal layer of a differential feed type dual-mode patch according to the present invention;
fig. 4 is a schematic diagram of 3-dimensional stacking of antenna linear arrays according to the present invention;
fig. 5 is a top view of a linear array of antennas according to the present invention;
fig. 6 is a schematic diagram of a common metal layer of a linear array antenna according to the present invention;
fig. 7 is a schematic diagram of a linear array feeding network of the antenna proposed by the present invention;
fig. 8 is a schematic diagram of a 3-dimensional stacking of the planar array of the antenna proposed by the present invention;
fig. 9 is a top view of the planar array of antennas of the present invention;
fig. 10 is a schematic diagram of a common metal layer of a planar array of antennas according to the present invention;
fig. 11 is a schematic diagram of a planar array feeding network of the antenna proposed by the present invention;
fig. 12 (a) is a graph of differential mode reflection coefficient and antenna gain of a differential feed type dual-mode patch;
FIG. 12 (b) is a graph of common-mode reflectance and common-mode absorption of a differential feed dual-mode patch;
fig. 12 (c) and (d) are radiation patterns of the differential feed type dual-mode patch radiation mode 1 on the E plane and the H plane, respectively;
fig. 12 (E) and (f) are radiation patterns of the differential feed type dual-mode patch radiation mode 2 on the E plane and the H plane, respectively;
fig. 13 (a) is a graph of the differential mode reflection coefficient and antenna gain of a linear array of antennas;
fig. 13 (b) is a graph of the common-mode reflection coefficient and the common-mode absorption rate of the linear array of the antenna;
fig. 13 (c) and (d) are radiation patterns of the antenna linear array radiation mode 1 on the E plane and the H plane, respectively;
fig. 13 (E) and (f) are radiation patterns of the antenna linear array radiation mode 2 on the E plane and the H plane, respectively;
FIG. 14 (a) is a graph of the differential mode reflection coefficient and antenna gain of a planar array of antennas;
fig. 14 (b) is a graph of common-mode reflection coefficient and common-mode absorption rate of a planar array of antennas;
fig. 14 (c) and (d) are radiation patterns of the antenna planar array radiation pattern 1 on the E plane and the H plane, respectively;
fig. 14 (E) and (f) are radiation patterns of the antenna planar array radiation mode 2 on the E plane and the H plane, respectively;
FIG. 15 is a graph of the total efficiency of a differential feed dual mode patch, a linear array of antennas, and a planar array of antennas;
the reference numerals in figures 1, 4, 8 are:
1-a radiation patch, 11-a first rectangular patch, 12-a second rectangular patch, 13-a third rectangular patch;
2-common metal ground, 21 coupling aperture;
30-a dual-port differential network, 31-a metalized short-circuit through hole, 32-a quarter-wavelength short-circuit branch sections, 33-an absorption resistor and 34-a connection branch section;
41-upper dielectric substrate, 42-lower dielectric substrate;
5-an adhesive layer;
6-differential power division feed network applied to the antenna linear array;
7-differential power division feed network applied to antenna planar array.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
The specific embodiment discloses a broadband common-mode absorption differential feed type dual-mode patch antenna, as shown in fig. 1. The antenna comprises an upper dielectric substrate 41, a lower dielectric substrate 42 and a three-layer metal structure; from top to bottom, the metal structure is sequentially a radiation patch 1, a common metal stratum 2 and a differential feed network; the radiation patch 1 is positioned on the upper surface of the upper-layer dielectric substrate 41, and is provided with a step width and has the structural characteristics of the step width, so that the radiation patch has dual-mode radiation characteristics; the common metal ground layer 2 is positioned on the upper surface of the lower dielectric substrate 42, and a T-shaped coupling aperture 21 is etched on the common metal ground layer to enhance the electromagnetic coupling between the differential feed network and the radiation patch 1; the differential feed network is positioned on the lower surface of the lower dielectric substrate 42 and comprises a dual-port differential network 30 and an absorption branch node loaded on a middle symmetrical plane along the signal input direction; the absorption branch section is formed by sequentially cascading a metalized short-circuit through hole 31, a quarter-wavelength short-circuit branch section 32, an absorption resistor 33 and a connecting branch section 34 along the signal input direction.
The radiation patch 1 sequentially comprises a first rectangular patch 11, a second rectangular patch 12 and a third rectangular patch 13;
the first rectangular patch 11 and the third rectangular patch 13 on two sides are wider, and the second rectangular patch 12 in the middle is narrower, so that the radiation patch 1 has dual-mode radiation characteristics.
The common metal ground layer 2 is etched with a T-shaped coupling aperture 21 on the middle symmetrical plane along the signal input direction.
The coupling aperture 21 is symmetrical about a middle symmetry plane in the signal input direction, and is composed of a groove along the signal input direction and a groove perpendicular to the signal input direction; the slots along the signal input direction may be rectangular or slots with a step width or other shapes that are symmetrical about a mid-plane of symmetry of the signal input direction; the grooves perpendicular to the signal input direction may be rectangular or meander-shaped or other shapes symmetrical about a mid-plane of symmetry of the signal input direction.
The ends of the quarter-wave short-circuit stubs 32 are shorted to the common metal ground layer 2 by the metallized short-circuit vias 31.
The common metal ground layer 2 and the upper dielectric substrate 41 need to be adhered by an adhesive layer 5 for lamination processing.
The metal material is selected to be copper, and the thickness of the copper is 0.035mm.
The dielectric substrate material is selected as Rogers RT 5880, and relevant electrical parameters are epsilon r =2.2, tan delta =0.0009. The upper dielectric substrate 41 has a thickness of 0.762mm and the lower dielectric substrate 42 has a thickness of 0.508mm. The bond coat material was chosen to be FSD300-T with relevant electrical parameters of epsilonr =3.0, tan δ =0.0015, and a bond coat thickness of 0.2mm.
Fig. 2 to fig. 3 are schematic diagrams of metal structures of layers of the differential feed type dual-mode patch antenna. The metal structures of the layers have the top-view relative position relationship as shown in fig. 2. The physical dimensions of the specific embodiment of the differential feed dual-mode patch antenna have been marked in the schematic diagram and are in mm. The absorption resistor R1 has a resistance of 60 Ω.
Fig. 12 (a) is a graph of the differential mode reflection coefficient and gain of the differential feed dual-mode patch. It can be seen that the differential mode reflection coefficient produces two reflection zeroes, located at 4.818GHz and 4.967GHz, respectively, corresponding to TM01 and TM11 resonant modes of the patch resonator, respectively. The differential mode reflection coefficient is less than-10 dB in the frequency range from 4.75GHz to 5GHz, and the relative bandwidth is 5.13%. Compared with the existing differential antenna designed based on the aperture coupling technology, the working bandwidth of the antenna is widened. In addition, in the working frequency band of the antenna (Sdd 11< -10 dB), the differential feed type dual-mode patch realizes the maximum gain of 7.84dBi at 4.82 GHz. Compared with the existing multimode antenna, the differential feed type dual-mode patch antenna disclosed by the invention has the advantage of high gain. Meanwhile, as can be seen from the gain curve, the differential feed type dual-mode patch has good gain filtering characteristics.
Fig. 12 (b) is a graph of common-mode reflection coefficient and common-mode absorption rate of the differential feeding dual-mode patch. It can be seen that the common-mode reflection coefficient of the differential feed type dual-mode patch is less than-10 dB in a frequency band from 3.2GHz to 6.95GHz, the corresponding common-mode absorptivity is greater than 80%, and the relative bandwidth of the common-mode absorption reaches 73.9%, which indicates that most common-mode noise energy can be lost by the surface-mounted resistor. This is a characteristic that existing differential antennas do not have.
Fig. 12 (c) to (f) show radiation patterns of the differential feed type dual-mode patch on the E-plane and the H-plane at two reflection zero frequency points.
Based on the proposed differential feed dual mode patch, the present embodiment discloses a differential antenna linear array with 1 × 4 units, as shown in fig. 4. From top to bottom, the differential antenna linear array comprises a radiating element linear array consisting of 4 radiating patches 1, an upper dielectric substrate 41, a common metal ground layer 2, a lower dielectric substrate 42 and a differential power division feed network 6 applied to the antenna linear array.
The common metal ground layer 2 and the upper dielectric substrate 41 need to be adhered by an adhesive layer 5 for lamination processing;
4T-shaped coupling apertures 21 are etched on the common metal layer 2 to form a coupling aperture linear array so as to realize electromagnetic coupling between the differential power division feed network and the radiation unit linear array.
The differential power division feed network 6 applied to the antenna linear array is formed by two identical 1-division-4 power division networks which are oppositely connected according to a central rotation symmetry mode and 4 absorption branch nodes loaded on a middle symmetry plane. The differential power division feed network 6 is designed into a folded shape, so that the compact structure of the antenna can be realized, the unit interval of each radiating unit in the linear array can be flexibly adjusted, and the performance index of the antenna can be further adjusted, such as: antenna gain, side lobe levels, etc.
The materials and thicknesses of the metal, the dielectric substrate and the bonding layer in the specific embodiment of the antenna linear array are the same as those in the specific embodiment of the differential feed type dual-mode patch.
Fig. 5 to 7 are schematic views of metal structures of layers of the antenna linear array. The metal structures of the layers have the top-view relative position relationship as shown in fig. 5. The physical dimensions of the embodiments of the linear array of antennas are indicated in the schematic diagram and are in mm. The absorption resistor R2 has a resistance of 60 Ω.
Fig. 13 (a) is a graph showing the differential mode reflection coefficient and gain of the antenna linear array. It can be seen that the differential mode reflection coefficient of the linear array is less than-10 dB in the frequency band from 4.72GHz to 4.98GHz, the relative bandwidth is 5.36%, and the two differential mode reflection zeros are respectively positioned at 4.78GHz and 4.943GHz. In the working frequency band of the antenna, the linear array realizes the maximum gain of 13.8dBi at the frequency point of 4.78 GHz.
Fig. 13 (b) is a graph of the common-mode reflection coefficient and the common-mode absorption rate of the linear array of antennas. It can be seen that the common-mode reflection coefficient of the antenna linear array is less than-10 dB in the frequency band of 3.15GHz to 6.3GHz, the corresponding common-mode absorption rate is greater than 80%, and the relative bandwidth of the common-mode absorption reaches 66.7%. This is a characteristic that existing differential antenna arrays do not have.
Fig. 13 (c) to (f) show the radiation patterns of the linear arrays at the two reflection zero-point frequency points on the E-plane and the H-plane.
Based on the proposed differential feed dual mode patch, the present embodiment discloses a planar array of differential antennas with 2 × 4 cells, as shown in fig. 8. From top to bottom, the antenna planar array includes a radiating element planar array composed of 8 radiating patches 1, an upper dielectric substrate 41, a common metal ground layer 2, a lower dielectric substrate 42, and a differential power division feed network 7 applied to the antenna planar array.
The common metal ground layer 2 and the upper dielectric substrate 41 need to be bonded by the bonding layer 5 for lamination processing.
8T-shaped coupling apertures 21 are etched on the common metal ground layer 2 to form a coupling aperture planar array so as to realize electromagnetic coupling between the differential power division feed network 7 and the radiating element planar array.
The differential power division feed network 7 applied to the antenna planar array is formed by two identical 1-to-8 power division networks which are oppositely connected according to a central rotation symmetry mode and 8 absorption branch nodes loaded on corresponding symmetry planes. The differential power division feed network 7 applied to the antenna planar array is designed into a folded shape, the compact structure of the antenna is realized, and simultaneously, the unit spacing of each radiation unit in the planar array can be flexibly adjusted, so as to adjust the performance index of the antenna, such as: antenna gain, side lobe levels, etc.
The materials and thicknesses of the metal, the dielectric substrate and the bonding layer in the specific embodiment of the antenna planar array are the same as those in the specific embodiment of the differential feed type dual-mode patch.
Fig. 9 to 11 are schematic views of metal structures of layers of the antenna planar array. The metal structures of the respective layers have a top-view relative positional relationship as shown in fig. 9. The physical dimensions of the antenna planar array embodiments are indicated in the schematic drawings and are in mm. The absorption resistor R3 has a resistance of 60 Ω.
Fig. 14 (a) is a graph of the differential mode reflection coefficient and gain of a planar array of antennas. It can be seen that the differential mode reflection coefficient of the planar array is less than-10 dB in the frequency band from 4.81GHz to 5.01GHz, the relative bandwidth is 4.07%, and the two differential mode reflection zeros are respectively located at 4.855GHz and 4.972GHz. In the working frequency band of the antenna, the gain realized by the planar array reaches 17.15dBi at the frequency point of 4.925GHz at most. Fig. 14 (b) is a graph of common-mode reflection coefficient and common-mode absorption rate of a planar array of antennas. It can be seen that the common-mode reflection coefficient of the antenna planar array is less than-10 dB in the frequency band from 2.76GHz to 5.8GHz, the corresponding common-mode absorption rate is greater than 80%, and the relative bandwidth of the common-mode absorption reaches 71%. This is a characteristic that existing differential antenna arrays do not have. Fig. 14 (c) to (f) show the radiation patterns of the linear arrays at the two reflection zero-point frequency points on the E plane and the H plane.
Fig. 15 is a graph of the total efficiency of the differential feed dual-mode patch, the linear array of the antenna, and the planar array of the antenna in this embodiment. It can be seen that the total efficiency of the three is higher than 80% in the corresponding working frequency band, which indicates that the designed differential feed type dual-mode patch and array have excellent radiation performance.
The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above examples, and all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (7)
1. The broadband common-mode absorption differential feed type dual-mode patch antenna is characterized by comprising an upper dielectric substrate (41), a lower dielectric substrate (42) and three layers of metal structures;
from top to bottom, the three layers of metal structures are a radiation patch (1), a common metal layer (2) and a differential feed network in sequence;
the radiation patch (1) is positioned on the upper surface of the upper-layer dielectric substrate (41), and the step width is set so that the radiation patch has a dual-mode radiation characteristic;
the common metal ground layer (2) is positioned on the upper surface of the lower dielectric substrate (42), and a T-shaped coupling aperture (21) is etched on the common metal ground layer to enhance the electromagnetic coupling between the differential feed network and the radiation patch (1);
the differential feed network is positioned on the lower surface of the lower-layer dielectric substrate (42) and comprises a dual-port differential network (30) and an absorption branch node loaded on a middle symmetrical plane along the signal input direction;
the absorption branch section is formed by sequentially cascading a metalized short-circuit through hole (31), a quarter-wavelength short-circuit branch section (32), an absorption resistor (33) and a connecting branch section (34) along the signal input direction.
2. The broadband common-mode absorbing differential feed dual-mode patch antenna according to claim 1, characterized in that the radiating patch (1) comprises a first rectangular patch (11), a second rectangular patch (12) and a third rectangular patch (13) in sequence;
the widths of the first rectangular patch (11) and the third rectangular patch (13) on two sides are larger than the width of the second rectangular patch (12) in the middle, so that the radiation patch (1) has dual-mode radiation characteristics.
3. The broadband common-mode absorbing differential feed dual-mode patch antenna according to claim 1, characterized in that the common metal ground layer (2) has a T-shaped coupling aperture (21) etched in the middle symmetry plane along the signal input direction.
4. The broadband common-mode absorbing differential-feed dual-mode patch antenna according to claim 1, characterized in that the coupling aperture (21) is symmetrical about a signal input direction mid-plane of symmetry, consisting of slots along the signal input direction and slots perpendicular to the signal input direction;
the grooves along the signal input direction are rectangular or grooves with step width or other shapes symmetrical about the middle symmetrical plane of the signal input direction;
the grooves perpendicular to the signal input direction are rectangular or meander-shaped or other shapes symmetrical about a mid-plane of symmetry of the signal input direction.
5. The broadband common-mode absorbing differential-feed dual-mode patch antenna according to claim 1, characterized in that the ends of the quarter-wave short-circuit stubs (32) are shorted to the common metal ground (2) by metallized short-circuit vias (31).
6. The differential antenna linear array with 1 x 4 units obtained based on the broadband common-mode absorption differential feed type dual-mode patch antenna of any one of claims 1 to 5 is characterized by comprising a radiation unit linear array consisting of 4 radiation patches (1), an upper dielectric substrate (41), a common metal ground layer (2), a lower dielectric substrate (42) and a differential power division feed network (6) applied to the antenna linear array from top to bottom;
the common metal ground layer (2) is adhered to the upper dielectric substrate (41) through an adhesive layer (5) for lamination processing;
4T-shaped coupling apertures (21) are etched on the common metal ground layer (2) to form a coupling aperture linear array so as to realize electromagnetic coupling between the differential power division feed network and the radiation unit linear array;
the differential power division feed network (6) applied to the antenna linear array is formed by two identical 1-to-4 power division networks which are oppositely connected in a central rotation symmetry mode and 4 absorption branch nodes loaded on a middle symmetry plane.
7. The planar array of the differential antenna with 2 x 4 units obtained based on the broadband common-mode absorption differential feed type dual-mode patch antenna of any one of claims 1 to 5, is characterized in that the planar array of the antenna comprises a radiating unit planar array consisting of 8 radiating patches (1), an upper dielectric substrate (41), a common metal ground layer (2), a lower dielectric substrate (42) and a differential power division feed network (7) applied to the planar array of the antenna from top to bottom;
the common metal ground layer (2) and the upper medium substrate (41) need to be bonded by a bonding layer (5) for lamination processing;
8T-shaped coupling apertures (21) are etched on the common metal ground layer (2) to form a coupling aperture planar array so as to realize electromagnetic coupling between the differential power division feed network (7) and the radiating element planar array;
the differential power division feed network (7) applied to the antenna planar array is formed by two identical 1-to-8 power division networks which are oppositely connected in a central rotation symmetry mode and 8 absorption branch nodes loaded on corresponding symmetry planes.
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| CN117353047B (en) * | 2023-10-10 | 2024-05-17 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117353047A (en) * | 2023-10-10 | 2024-01-05 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
| CN117353047B (en) * | 2023-10-10 | 2024-05-17 | 广州程星通信科技有限公司 | Broadband wide-angle scanning phased array antenna unit and array thereof |
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