CN111129753A - Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity - Google Patents
Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity Download PDFInfo
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- CN111129753A CN111129753A CN202010026382.0A CN202010026382A CN111129753A CN 111129753 A CN111129753 A CN 111129753A CN 202010026382 A CN202010026382 A CN 202010026382A CN 111129753 A CN111129753 A CN 111129753A
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- 239000000758 substrate Substances 0.000 title claims abstract description 94
- 238000010586 diagram Methods 0.000 title abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 29
- 229910052802 copper Inorganic materials 0.000 claims description 29
- 239000010949 copper Substances 0.000 claims description 29
- 230000005855 radiation Effects 0.000 abstract description 12
- 230000010354 integration Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
- H01Q3/247—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching by switching different parts of a primary active element
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Abstract
The utility model provides a fixed frequency directional diagram reconfigurable antenna based on half mode substrate integrated cavity, including half mode substrate integrated cavity (1) and switch circuit (2), half mode substrate integrated cavity (1) comprises electrically conductive top surface (3), dielectric substrate (4), electrically conductive bottom surface (5), feed probe (6), electrically conductive lateral wall (7), coupling opening (8), half mode substrate integrated cavity (1) divide into upper portion half mode substrate integrated cavity (11) and lower part half mode substrate integrated cavity (12) that mirror symmetry placed, switch circuit (2) include upper portion switch (21) and lower part switch (22). The antenna is a single-chip antenna, is small and flat, is suitable for portable and wearable equipment, can realize fixed-frequency reconstruction of a radiation pattern of the single-chip antenna, and has a good application prospect.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a fixed-frequency directional pattern reconfigurable antenna based on a half-mode substrate integrated cavity.
Background
In recent years, an antenna having a radiation pattern reconfigurable characteristic has been one of the research hotspots in the antenna field because of its flexibility in transmitting and receiving signals in a dynamically adjustable direction. The antenna array can realize the reconstruction of a radiation pattern by controlling the amplitude and the phase of each unit signal source in the feed network, can obtain the radiation pattern with strong directivity and high gain, and has the defects of large size, complex structure and the like. Portable and wearable applications have large limitations on antenna size and do not require high antenna gain, and therefore pattern reconfigurable antennas in the form of antenna arrays are not suitable for such applications. Designing an antenna that requires a reconfigurable pattern with moderate gain, simple structure and small size, a large antenna array is not a suitable solution. Therefore, reconfigurable element antennas that do not require complex feed networks may be more suitable for such applications.
Disclosure of Invention
The invention aims to provide a fixed-frequency directional pattern reconfigurable antenna based on a half-mold substrate integrated cavity, which is small in size and simple in structure, so as to solve the problems that the existing array antenna is complex in structure, large in size and not suitable for portable and wearable equipment.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a fixed-frequency directional pattern reconfigurable antenna based on a half-mode substrate integrated cavity comprises the half-mode substrate integrated cavity and a switch circuit, wherein the half-mode substrate integrated cavity is composed of a conductive top surface, a dielectric substrate, a conductive bottom surface, a feed probe, a conductive side wall and a coupling opening; the half-mold substrate integrated cavity is divided into an upper half-mold substrate integrated cavity and a lower half-mold substrate integrated cavity which are arranged in a mirror symmetry mode, and the switch circuit comprises an upper switch and a lower switch. The feed probe is a copper cylinder, the top end of the copper cylinder is connected with the conductive top surface, the bottom end of the copper cylinder is insulated from the conductive bottom surface, the feed probe is positioned in the lower half-mode substrate integrated cavity, the top end of the upper switch is connected with the conductive top surface, the bottom end of the upper switch is connected with the conductive bottom surface, the top end of the lower switch is connected with the conductive top surface, and the bottom end of the lower switch is connected with the conductive bottom surface.
The conductive side wall is composed of copper through holes which are arranged at equal intervals, the top ends of the copper through holes are connected with the conductive top surface, and the bottom ends of the copper through holes are connected with the conductive bottom surface; the conductive side wall is divided into a left conductive side wall, a right conductive side wall and a middle conductive side wall, the left conductive side wall and the right conductive side wall are respectively positioned at the left side and the right side of the conductive top surface, and the middle conductive side wall is positioned in the middle of the conductive top surface; the upper side and the lower side of the middle conductive side wall are respectively provided with an upper half-mold substrate integrated cavity and a lower half-mold substrate integrated cavity; the upper switch is located at the edge of the upper half-mold substrate integration cavity, and the lower switch is located at the edge of the lower half-mold substrate integration cavity. The coupling opening is positioned in the center of the middle conductive side wall; the dielectric substrate is of a cuboid structure, the conductive top surface is of a rectangular structure, and the conductive top surface is positioned in the center of the top surface of the dielectric substrate; the conductive bottom surface is in a rectangular structure and is positioned in the center of the bottom surface of the dielectric substrate.
Further, the upper switch and the lower switch are formed of a switching diode circuit.
Further, the conductive top surface and the conductive bottom surface are copper-clad.
Further, the radius of the copper cylinder is 0.6 mm.
Furthermore, the radius of the copper via holes is 0.4mm, and the distance between the copper via holes is 2 mm.
Further, the coupling openings have a pitch of 9 mm.
Further, the dielectric substrate is of a cuboid structure, the length of the dielectric substrate is 110mm, the width of the dielectric substrate is 110mm, and the height of the dielectric substrate is 1.58 mm; the dielectric substrate is made of Rogers RT/duroid 5880, the size of the conductive bottom surface is the same as that of the dielectric substrate, the length of the conductive top surface is 67.8mm, and the width of the conductive top surface is 57.8 mm.
Furthermore, when the distance between the switch circuit and the right conductive side wall is 3mm, the impedance matching is optimal.
Compared with the prior art, the invention has the beneficial effects that:
the fixed-frequency directional pattern reconfigurable antenna based on the half-mode substrate integrated cavity is a single-chip antenna, is small and flat in size, and is suitable for portable and wearable equipment; the working frequency of the antenna is 2.45GHz, when an upper switch and a lower switch which are contained in a switch circuit are in a conducting state at the same time, the main beam direction of an xz plane radiation pattern is 36 degrees, the maximum gain is 8.0dBi, the antenna radiation efficiency is 94 percent, when the upper switch and the lower switch which are contained in the switch circuit are in a disconnecting state at the same time, the main beam direction of the xz plane radiation pattern is 12 degrees, the maximum gain is 8.1dBi, and the antenna radiation efficiency is 93 percent, the fixed-frequency reconstruction of the radiation pattern of the single-chip antenna can be realized, and the antenna has a better application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a fixed-frequency directional pattern reconfigurable antenna based on a half-mold substrate integrated cavity according to an embodiment of the invention;
fig. 2 is a simulated and measured return loss curve of a fixed-frequency directional pattern reconfigurable antenna based on a half-mold substrate integrated cavity according to an embodiment of the present invention, wherein a dotted line represents a simulated curve and a solid line represents a measured curve;
fig. 3 is a 2.45GHz simulated, measured normalized xz plane normalized radiation pattern of a fixed-frequency pattern reconfigurable antenna based on a half-mold substrate integrated cavity according to an embodiment of the present invention, wherein a dotted line represents a simulation curve, a solid line represents a measured curve, fig. a shows that an upper switch (21) and a lower switch (22) are both in an off state, and fig. b shows that the upper switch (21) and the lower switch (22) are both in an on state;
in fig. 1: 1-a half-mold substrate integrated cavity; 11-upper half-mold substrate integrated cavity; 12-lower mold half substrate integration cavity; 2-a switching circuit; 21-upper switch; 22-lower switch; 3-a conductive top surface; 4-a dielectric substrate; 5-a conductive bottom surface; 6-feed probe; 7-conductive sidewalls; 71-left conductive sidewall; 72-right conductive sidewall; 73-middle conductive side wall; 8-coupling opening.
The specific implementation mode is as follows:
the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Example (b):
as shown in fig. 1, a fixed-frequency pattern reconfigurable antenna based on a half-mold substrate integrated cavity comprises a half-mold substrate integrated cavity 1 and a switch circuit 2. The half-mold substrate integrated cavity 1 is composed of a conductive top surface 3, a dielectric substrate 4, a conductive bottom surface 5, a feed probe 6, a conductive side wall 7 and a coupling opening 8. The mold half substrate integrated cavity 1 is divided into an upper mold half substrate integrated cavity 11 and a lower mold half substrate integrated cavity 12 which are arranged in a mirror symmetry manner. The switching circuit 2 includes an upper switch 21 and a lower switch 22. The top end of the upper switch 21 is connected with the conductive top surface 3, and the bottom end of the upper switch 21 is connected with the conductive bottom surface 5. The top end of the lower switch 22 is connected with the conductive top surface 3, and the bottom end of the lower switch 22 is connected with the conductive bottom surface 5. The upper switch 21 and the lower switch 22 are each constituted by a switching diode circuit. The upper switch 21 is located at the edge of the upper half mold substrate integrated cavity 11 and the lower switch 22 is located at the edge of the lower half mold substrate integrated cavity 12.
The conductive top surface 3 is located at the center of the top surface of the dielectric substrate 4. The conductive bottom surface 5 is positioned at the center of the bottom surface of the dielectric substrate 4. The conductive top surface 3 and the conductive bottom surface 5 are coated with copper, so that the conductive top surface and the conductive bottom surface have good conductivity. The dielectric substrate 4 is of a cuboid structure, the length of the dielectric substrate 4 is 110mm, the width of the dielectric substrate 4 is 110mm, and the height of the dielectric substrate 4 is 1.58 mm; the dielectric substrate 4 was made of Rogers RT/duroid 5880 material, and the dielectric substrate 4 had a relative dielectric constant of 2.2 and a loss tangent of 0.0009. The size of the conductive bottom surface 5 is the same as that of the bottom surface of the dielectric substrate 4, namely, the conductive bottom surface 5 is in a square structure, and the length of the conductive bottom surface 5 is 110mm and the width of the conductive bottom surface 5 is 110 mm. The conductive top surface 3 is a rectangular structure, and the length of the conductive top surface 3 is 67.8mm, and the width is 57.8 mm.
The lower half-mould substrate integrated cavity 11 is excited by the feed probe 6 and the upper half-mould substrate integrated cavity 12 is excited through the coupling opening 8. At 2.45GHz, when the upper switch 21 and the lower switch 22 are in the on state or the off state at the same time, the upper half-mold substrate integrated cavity 11 and the lower half-mold substrate integrated cavity 12 are in the even mode and the odd mode respectively, and the radiation pattern has different main beam directions, so that the fixed-frequency pattern reconstruction is realized.
Carrying out simulation analysis by using an electromagnetic simulation software HFSS to obtain a fixed-frequency directional pattern reconfigurable antenna size structure based on a half-mode substrate integrated cavity: w is 110mm, L is 110mm, d is 3 mm.
Fig. 2 is a graph of simulated and actually measured return loss of a fixed-frequency directional diagram reconfigurable antenna based on a half-mold substrate integrated cavity according to an embodiment of the present invention, and it can be seen that the simulated curve is well matched with the actually measured curve, wherein the left-side curve corresponds to the upper switch 21 and the lower switch 22 and is in an off state, and the right-side curve corresponds to the upper switch 21 and the lower switch 22 and is in an on state.
Fig. 3 shows a 2.45GHz simulated and measured xz plane normalized radiation pattern of a fixed-frequency pattern reconfigurable antenna based on a half-mold substrate integrated cavity according to an embodiment of the present invention, and it can be seen that a simulated curve approximately matches a measured curve, where a dotted line represents the simulated curve, a solid line represents the measured curve, a diagram (a) corresponds to an upper switch 21 and a lower switch 22 both being in an off state, and a diagram (b) corresponds to an upper switch 21 and a lower switch 22 both being in an on state.
Claims (8)
1. A fixed-frequency directional pattern reconfigurable antenna based on a half-mode substrate integrated cavity is characterized in that: the half-mold substrate integrated cavity comprises a half-mold substrate integrated cavity (1) and a switch circuit (2), wherein the half-mold substrate integrated cavity (1) is composed of a conductive top surface (3), a dielectric substrate (4), a conductive bottom surface (5), a feed probe (6), a conductive side wall (7) and a coupling opening (8), the half-mold substrate integrated cavity (1) is divided into an upper half-mold substrate integrated cavity (11) and a lower half-mold substrate integrated cavity (12) which are arranged in mirror symmetry, and the switch circuit (2) comprises an upper switch (21) and a lower switch (22);
the feed probe (6) is a copper cylinder, the top end of the copper cylinder is connected with the conductive top surface (3), the bottom end of the copper cylinder is insulated from the conductive bottom surface (5), the feed probe (6) is positioned in the lower half-mold substrate integrated cavity (12), the top end of the upper switch (21) is connected with the conductive top surface (3), the bottom end of the upper switch (21) is connected with the conductive bottom surface (5), the top end of the lower switch (22) is connected with the conductive top surface (3), and the bottom end of the lower switch (22) is connected with the conductive bottom surface (5);
the conductive side wall (7) is composed of copper through holes which are arranged at equal intervals, the top ends of the copper through holes are connected with the conductive top surface (3), and the bottom ends of the copper through holes are connected with the conductive bottom surface (5); the conductive side wall (7) is divided into a left conductive side wall (71), a right conductive side wall (72) and a middle conductive side wall (73), the left conductive side wall (71) and the right conductive side wall (72) are respectively positioned at the left side and the right side of the conductive top surface (3), and the middle conductive side wall (73) is positioned in the middle of the conductive top surface (3); the upper side and the lower side of the middle conductive side wall (73) are respectively provided with an upper half-mold substrate integrated cavity (11) and a lower half-mold substrate integrated cavity (12); the upper switch (21) is positioned at the edge of the upper half-mold substrate integrated cavity (11), the lower switch (22) is positioned at the edge of the lower half-mold substrate integrated cavity (12), and the coupling opening (8) is positioned at the center of the middle conductive side wall (73);
the dielectric substrate (4) is of a cuboid structure, the conductive top surface (3) is of a rectangular structure, and the conductive top surface (3) is positioned at the center of the top surface of the dielectric substrate (4); the conductive bottom surface (5) is of a rectangular structure, and the conductive bottom surface (5) is positioned at the center of the bottom surface of the dielectric substrate (4).
2. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the upper switch (21) and the lower switch (22) are formed by switching diode circuits.
3. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the conductive top surface (3) and the conductive bottom surface (5) are coated with copper.
4. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the radius of the copper cylinder is 0.6 mm.
5. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the radius of copper via hole is 0.4mm, the interval is 2mm between the copper via hole.
6. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the distance between the coupling openings (8) is 9 mm.
7. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: the length of the dielectric substrate (4) is 110mm, the width is 110mm, and the height is 1.58 mm; the dielectric substrate (4) is made of Rogers RT/duroid 5880, the size of the conductive bottom surface (5) is the same as that of the dielectric substrate (4), and the length and the width of the conductive top surface (3) are 67.8mm and 57.8mm respectively.
8. The antenna of claim 1, wherein the antenna is a reconfigurable antenna with a fixed frequency pattern based on a half-mold substrate integrated cavity, and comprises: when the distance between the switch circuit (2) and the right conductive side wall (72) is 3mm, the impedance matching is optimal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010026382.0A CN111129753A (en) | 2020-01-10 | 2020-01-10 | Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity |
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| CN202010026382.0A CN111129753A (en) | 2020-01-10 | 2020-01-10 | Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity |
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| CN111129753A true CN111129753A (en) | 2020-05-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937319A (en) * | 2006-10-12 | 2007-03-28 | 上海交通大学 | Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna |
| CN104577316A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院上海微系统与信息技术研究所 | Vertical coupled feeding structure applied to millimeter-wave microstrip antenna |
| CN107026327A (en) * | 2017-03-13 | 2017-08-08 | 北京航空航天大学 | A kind of half-module substrate integrated waveguide leaky-wave antenna |
| CN206650172U (en) * | 2017-04-18 | 2017-11-17 | 江苏建筑职业技术学院 | A kind of wearable turnover structure half module substrate integrates cavity antenna |
| US20190181559A1 (en) * | 2018-02-21 | 2019-06-13 | Mohammad Hossein Mazaheri Kalahrudi | Wideband substrate integrated waveguide slot antenna |
| CN211088508U (en) * | 2020-01-10 | 2020-07-24 | 江苏师范大学 | Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity |
-
2020
- 2020-01-10 CN CN202010026382.0A patent/CN111129753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937319A (en) * | 2006-10-12 | 2007-03-28 | 上海交通大学 | Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna |
| CN104577316A (en) * | 2014-12-30 | 2015-04-29 | 中国科学院上海微系统与信息技术研究所 | Vertical coupled feeding structure applied to millimeter-wave microstrip antenna |
| CN107026327A (en) * | 2017-03-13 | 2017-08-08 | 北京航空航天大学 | A kind of half-module substrate integrated waveguide leaky-wave antenna |
| CN206650172U (en) * | 2017-04-18 | 2017-11-17 | 江苏建筑职业技术学院 | A kind of wearable turnover structure half module substrate integrates cavity antenna |
| US20190181559A1 (en) * | 2018-02-21 | 2019-06-13 | Mohammad Hossein Mazaheri Kalahrudi | Wideband substrate integrated waveguide slot antenna |
| CN211088508U (en) * | 2020-01-10 | 2020-07-24 | 江苏师范大学 | Fixed-frequency directional diagram reconfigurable antenna based on half-mode substrate integrated cavity |
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