CN110661105A - Slotted two-side periodic short circuit nail microstrip leaky-wave antenna for floor - Google Patents
Slotted two-side periodic short circuit nail microstrip leaky-wave antenna for floor Download PDFInfo
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- CN110661105A CN110661105A CN201910765277.6A CN201910765277A CN110661105A CN 110661105 A CN110661105 A CN 110661105A CN 201910765277 A CN201910765277 A CN 201910765277A CN 110661105 A CN110661105 A CN 110661105A
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- floor
- wave antenna
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- microstrip leaky
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- 230000000737 periodic effect Effects 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 50
- 239000004020 conductor Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 1
- 238000004364 calculation method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/206—Microstrip transmission line antennas
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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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- Waveguide Aerials (AREA)
Abstract
The invention discloses a microstrip leaky-wave antenna with periodically short-circuit nails on two sides of a floor slot, which comprises the microstrip leaky-wave antenna and the periodically short-circuit nails, wherein the microstrip leaky-wave antenna comprises a patch layer, a dielectric layer and a metal ground plate which are sequentially arranged from top to bottom, the short-circuit nails penetrate through the dielectric layer from top to bottom and are periodically distributed, the metal ground plate is provided with the floor slot, and the floor slot is periodically distributed. According to the invention, the front-back scanning of the main beam of the antenna is realized and the sweep frequency range is increased by loading the periodic short-circuit nails on the two sides; meanwhile, the floor is periodically grooved, so that a new scanning angle is provided for the antenna in the lower space, and the beam scanning range is further enlarged.
Description
Technical Field
The invention relates to the technical field of radio, in particular to a double-side periodic short circuit nail microstrip leaky-wave antenna with a slotted floor.
Background
Leaky wave antennas are favored in modern communication applications due to their inherent frequency scanning characteristics. Microstrip leaky-wave antennas attract a lot of attention due to the low profile, simple feed structure and easy fabrication of the antennas. However, the periodic leaky-wave antenna is generally designed to face the upper space of the antenna, so that only upper space scanning can be performed; due to the influence of an Open Stop Band (OSB), the periodic leaky-wave antenna generally has no beam in the normal direction, so that the beam scanning range is limited and cannot be used in a communication scene requiring a large beam scanning range; in addition, methods for realizing forward and backward scanning of the main beam of the antenna in the upper space mainly comprise an antenna array, phase shifter control, a CRLH structure and the like, and the antenna structures of the realization methods are complex and have high manufacturing difficulty.
Disclosure of Invention
The invention provides a bilateral periodic short-circuit nail microstrip leaky-wave antenna with a slotted floor, which aims to solve the problems that the scanning angle range of a main beam of the conventional periodic leaky-wave antenna is small, no obvious beam exists in the normal direction and the like.
In order to achieve the above purpose, the technical means adopted is as follows:
the utility model provides a slotted two sides periodic short circuit nail microstrip leaky-wave antenna in floor, includes microstrip leaky-wave antenna and periodic short circuit nail, microstrip leaky-wave antenna is including paster layer, dielectric layer and the metal ground plate that from top to bottom sets gradually, the short circuit nail from top to bottom passes the dielectric layer sets up and is the periodic distribution, set up floor fluting on the metal ground plate just the floor fluting is the periodic distribution.
In the scheme, the front-back scanning of the main beam of the antenna is realized and the sweep frequency range is increased by loading the periodic short-circuit nails; meanwhile, the floor is periodically grooved, so that a new scanning angle is provided for the antenna in the lower space, and the beam scanning range is further enlarged.
Preferably, the patch layer includes a metal patch, a feeder line, and a feed connector, the metal patch is disposed to be closely attached to one side of the dielectric layer, the metal ground plate is disposed to be closely attached to the other side of the dielectric layer, the feeder line is disposed to be closely attached to the metal patch, a center feed pin of the feed connector is connected to the feeder line, and an outer conductor of the feed connector is connected to the metal ground plate.
Preferably, the short circuit nails are arranged on two side edges of the metal patch in a staggered mode according to a period.
Preferably, the distance between two adjacent short-circuit nails on the same side of the metal patch is the same, and except for the short-circuit nails arranged at two ends of the metal patch, any short-circuit nail on one side of the metal patch is located on the symmetry axis of the two short-circuit nails closest to the short-circuit nail on the other side of the metal patch. In the preferred scheme, the front-back scanning of the main beam of the antenna is realized by loading the periodic short-circuit nails on the two sides of the metal patch, and the sweep frequency range of the main beam is increased.
Preferably, the floor slots are periodically and alternately distributed along the metal patches.
Preferably, the medium layer is a solid medium or an air medium.
Preferably, the metal patch, the feeder line, the metal floor and the floor slot are in a planar structure
Preferably, the radius of the short-circuit pin, the distance between two adjacent short-circuit pins on the same side, and the number of the short-circuit pins are determined according to the antenna beam scanning angle range and the impedance matching requirement.
Preferably, the size of the floor slots, the distribution period of the floor slots and the number of the floor slots are determined according to the scanning angle range of the antenna beams and the impedance matching requirement.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the invention, the periodic short-circuit nails are loaded on the two sides of the metal patch, so that the forward and backward scanning of the main beam of the antenna is realized, and the sweep frequency range is increased; meanwhile, a groove is periodically formed in the floor, so that a new scanning angle is provided for the antenna in the lower space, and the beam scanning range is further enlarged; by changing the structural parameters of the antenna, the OSB phenomenon is suppressed, so that seamless scanning of the main beam of the antenna from back to front is realized. The invention has simple structure and easy realization, solves the problems of small main beam scanning angle range and no obvious beam in the normal direction of the conventional periodic leaky-wave antenna, and meets the use requirement of a communication scene needing a larger beam scanning range.
Drawings
FIG. 1 is a schematic front view of example 1;
FIG. 2 is a schematic back view of example 1;
FIG. 3 is a schematic side view of example 1;
FIG. 4 is a schematic view of the entire structure of embodiment 1;
FIG. 5 is a graph of the measured S11 for the antenna of example 1;
fig. 6 is the measured radiation pattern of the antenna of example 1;
fig. 7 is a phase constant diagram of antenna measurement and formula calculation in example 1.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 to 3, embodiment 1 provides a microstrip leaky-wave antenna with periodic short-circuit nails 3 on both sides of a floor slot 6, which includes a microstrip leaky-wave antenna and periodic short-circuit nails 3, where the microstrip leaky-wave antenna includes a patch layer, a dielectric layer 1 and a metal ground plate 5, which are sequentially arranged from top to bottom, and the patch layer includes a metal patch 2, a feeder line 4 and a feeder connector 7; the short circuit nails 3 penetrate through the medium layer 1 from top to bottom and are periodically distributed; the metal grounding plate 5 is provided with floor slots 6, and the floor slots 6 are periodically and alternately distributed along the metal patches 2; the metal patch 2, the feeder line 4, the metal floor and the floor slot 6 are of a planar structure, the metal patch 2 is tightly attached to one side of the dielectric layer 1, the metal ground plate 5 is tightly attached to the other side of the dielectric layer 1, the feeder line 4 is tightly attached to the metal patch 2, a central feeder needle of the feeder joint 7 is connected with the feeder line 4, and an outer conductor of the feeder joint 7 is connected with the metal ground plate 5. The short circuit nails 3 are arranged on two side edges of the metal patch 2 in a staggered mode, the distance between two adjacent short circuit nails 3 on the same side edge of the metal patch 2 is the same, the short circuit nails 3 arranged at two ends of the metal patch 2 are removed, and for the rest short circuit nails 3, any short circuit nail 3 on one side edge of the metal patch 2 is located on the symmetry axis of the other side edge of the metal patch 2 and the two short circuit nails 3 which are most adjacent to the short circuit nail.
In this embodiment 1, the dielectric layer 1 is a solid dielectric; the radius of the short-circuit nails 3, the distance between two adjacent short-circuit nails 3 on the same side and the number of the short-circuit nails 3 are determined according to the antenna beam scanning angle range and the impedance matching requirement; the size of the floor slots 6, the distribution period of the floor slots 6 and the number of the floor slots 6 are determined according to the antenna beam scanning angle range and the impedance matching requirement.
Fig. 5 shows the measured S of the dual-side periodic short-circuit pin 3 microstrip leaky-wave antenna of the floor slot 6 provided in this embodiment 111Fig. 6 is a graph showing the operation of the dual-side periodic short-circuit nail 3 microstrip leaky-wave antenna of the floor slot 6 provided in this embodiment 1 and the radiation patterns at five frequency points of 5.2GHz, 5.5GHz, 6.2GHz, 6.9GHz, and 7.1GHz, where a black smooth curve indicates that f is 5.2GHz, a curve formed by sparser points indicates that f is 5.5GHz, a curve formed by denser points indicates that f is 6.2GHz, a curve formed by a combination of point lines indicates that f is 6.9GHz, and a gray smooth curve indicates that f is 7.1 GHz. It can be seen that the periodic structure of the short-circuit nails 3 on both sides in the antenna of this embodiment 1 realizes the forward and backward scanning of the main beam of the antenna, and there is also significant scanning in the normal direction; the periodic slotting of the metal grounding plate 5 enables the lower space of the antenna to have obvious scanning; namely, the double-side periodic short-circuit pin 3 microstrip leaky-wave antenna of the floor slot 6 provided in this embodiment 1 realizes a larger beam scanning range.
Fig. 7 is a phase constant diagram of calculation and actual measurement of the dual-side periodic short-circuit pin microstrip leaky-wave antenna slotted on the floor provided in this embodiment 1, where a smooth line in the diagram represents a calculated phase constant, and a dotted line represents an actual measurement phase constant. The phase constant of the spatial scan of the lower part of the antenna is determined by the phase constant of the upper space and differs from the normalized phase constant of the upper space by lambda/P.
As shown in fig. 4, the main beam angle θ of the dual-side periodic short-circuit nail microstrip leaky-wave antenna slotted on the floor provided in this embodiment 1 is determined by the phase constant βzDetermining:
wherein beta iszIs a phase constant, k0Is the wave number in free space.
Obtaining the propagation constant k of the basic unit of the microstrip leaky-wave antenna with the periodic short-circuit nails on two sides based on the traditional MLWA propagation constant calculation method and Floquet theoryzn：
Wherein the period pitch p ═ d
Wherein W' is the modification of the antenna width W:
W'＝0.627W+1.264d
wherein the equivalent extension length
Wherein epsiloneEffective dielectric constant:
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides a slotted two sides periodic short circuit nail microstrip leaky-wave antenna of floor, its characterized in that, includes microstrip leaky-wave antenna and periodic short circuit nail, microstrip leaky-wave antenna is including paster layer, dielectric layer and the metal ground plate that from top to bottom sets gradually, the short circuit nail from top to bottom passes the dielectric layer sets up and is the periodic distribution, set up floor fluting on the metal ground plate just the floor fluting is the periodic distribution.
2. The dual-sided periodic shorting pin microstrip leaky-wave antenna of claim 1, wherein the patch layer includes a metal patch, a feed line, and a feed connector, the metal patch is disposed in close contact with one side of the dielectric layer, the metal ground plate is disposed in close contact with the other side of the dielectric layer, the feed line is disposed in close contact with the metal patch, a center feed pin of the feed connector is connected with the feed line, and an outer conductor of the feed connector is connected with the metal ground plate.
3. The dual-sided periodic shorting pin microstrip leaky-wave antenna slotted on a floor of claim 2, wherein the shorting pins are arranged on both sides of the metal patch in a periodic staggered manner.
4. The dual-sided periodic shorted-pin microstrip leaky-wave antenna slotted on floor of claim 3, wherein the distance between two adjacent shorted-pins on the same side of the metal patch is the same, and except for the shorted-pins arranged at both ends of the metal patch, any shorted-pin on one side of the metal patch is located on the symmetry axis of the two shorted-pins most adjacent to the shorted-pins on the other side of the metal patch.
5. The dual sided periodic shorting pin microstrip leaky-wave antenna of claim 2, wherein said floor slots are periodically staggered along said metal patch.
6. The dual-sided periodic shorting pin microstrip leaky-wave antenna slotted on a floor of claim 1, wherein the dielectric layer is a solid medium or an air medium.
7. The dual-sided periodic shorting pin microstrip leaky-wave antenna of claim 2, wherein the metal patch, the feed line, the metal floor, and the floor slot are planar structures.
8. The dual-sided periodic shorting pin microstrip leaky-wave antenna of claim 4, wherein the radius of the shorting pin, the distance between two adjacent shorting pins on the same side, and the number of shorting pins are determined according to the antenna beam scanning angle range and the impedance matching requirement.
9. The dual-sided periodic shorting pin microstrip leaky-wave antenna of claim 5, wherein the size of the floor slot, the distribution period of the floor slot and the number of the floor slots are determined according to the antenna beam scanning angle range and the impedance matching requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765277.6A CN110661105A (en) | 2019-08-19 | 2019-08-19 | Slotted two-side periodic short circuit nail microstrip leaky-wave antenna for floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765277.6A CN110661105A (en) | 2019-08-19 | 2019-08-19 | Slotted two-side periodic short circuit nail microstrip leaky-wave antenna for floor |
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| Publication Number | Publication Date |
|---|---|
| CN110661105A true CN110661105A (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910765277.6A Pending CN110661105A (en) | 2019-08-19 | 2019-08-19 | Slotted two-side periodic short circuit nail microstrip leaky-wave antenna for floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054305A (en) * | 2020-08-18 | 2020-12-08 | 南昌大学 | Periodic leaky-wave antenna based on composite left-right-hand structure and highly stable gain |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6285325B1 (en) * | 2000-02-16 | 2001-09-04 | The United States Of America As Represented By The Secretary Of The Army | Compact wideband microstrip antenna with leaky-wave excitation |
| CN109659700A (en) * | 2018-11-06 | 2019-04-19 | 佛山市顺德区中山大学研究院 | A kind of periodic short circuit nail microband leaky-wave antenna |
-
2019
- 2019-08-19 CN CN201910765277.6A patent/CN110661105A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6285325B1 (en) * | 2000-02-16 | 2001-09-04 | The United States Of America As Represented By The Secretary Of The Army | Compact wideband microstrip antenna with leaky-wave excitation |
| CN109659700A (en) * | 2018-11-06 | 2019-04-19 | 佛山市顺德区中山大学研究院 | A kind of periodic short circuit nail microband leaky-wave antenna |
Non-Patent Citations (2)
| Title |
|---|
| RAVI SHAW ET AL: "Backfire Microstrip Leaky-Wave Antenna With Reduced Sidelobe and Low Cross Polarization", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
| 李元新 等: "一种周期性短路结构的半宽度微带漏波天线", 《2011年全国微波毫米波会议论文集（上册）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054305A (en) * | 2020-08-18 | 2020-12-08 | 南昌大学 | Periodic leaky-wave antenna based on composite left-right-hand structure and highly stable gain |
| CN112054305B (en) * | 2020-08-18 | 2023-03-14 | 南昌大学 | Periodic leaky-wave antenna based on composite left-right-hand structure and highly stable gain |
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Application publication date: 20200107 |