CN111262024A - Low-profile vertical polarization end-fire antenna based on artificial surface plasmon structure - Google Patents
Low-profile vertical polarization end-fire antenna based on artificial surface plasmon structure Download PDFInfo
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- CN111262024A CN111262024A CN202010069613.6A CN202010069613A CN111262024A CN 111262024 A CN111262024 A CN 111262024A CN 202010069613 A CN202010069613 A CN 202010069613A CN 111262024 A CN111262024 A CN 111262024A
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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
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
- H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
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Abstract
The invention provides a low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure, which comprises: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint; the SSPPs transmission and radiation structures are uniformly distributed above the floor; the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure; the top SSPPs loading structure is parallel to the floor plane; the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement; the SMA connector feeds the SSPPs antenna. The invention can effectively reduce the working wavelength of the antenna by combining the wavelength shortening effect of the SSPPs theory, thereby realizing the purpose of miniaturization.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an ultra-low profile vertical polarization endfire antenna based on an artificial surface plasmon structure, and particularly relates to a multiband low profile vertical polarization endfire antenna based on an artificial surface plasmon (SSPPs) structure, and the multiband low profile vertical polarization endfire antenna can form an array approximate to omnidirectional radiation.
Background
The continuous progress of scientific technology and the increasing demand of society in various aspects push the rapid development of wireless communication technology, and antennas as important components in wireless communication systems are receiving more attention. Communication equipment is also indispensable on various carriers such as satellites, automobiles, ships and the like, and the requirements on antennas are more and more strict. Miniaturization and low profile of the antenna are inevitable trends in development on the basis of ensuring the performance of the antenna. Typically, the endfire antenna is implemented as a Vivaldi antenna, horn antenna, or the like, but such antennas typically have a cross-sectional height of 1/2 wavelengths at the operating frequency, and are relatively large at low frequencies. The invention utilizes the wavelength shortening effect in the SPP theory to realize the low profile and miniaturization of the antenna; the single-piece single-side comb-shaped SSPPs antenna is combined and placed on a metal floor, and the top SSPPs loading structure is utilized, so that the working frequency is reduced under the condition that the section of the antenna is not changed, and the end-fire effect is realized.
Patent document CN109155462A discloses an antenna having: a linear 1 st antenna section; a conduction part for connecting the 1 st antenna part and a power supply point; a region in which both ends of the 1 st antenna part are short-circuited and grounded; and a 2 nd antenna unit which is disposed in a region surrounded by the region and the 1 st antenna unit, at least a part of which overlaps the conductive portion with the conductive portion via a dielectric. There is still room for improvement in antenna performance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an ultralow-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure.
The invention provides a low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure, which is characterized by comprising the following components: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint; the SSPPs transmission and radiation structures are uniformly distributed above the floor; the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure; the top SSPPs loading structure is parallel to the floor plane; the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement; the SMA connector feeds the SSPPs antenna.
Preferably, the SSPPs transport and radiation structure is a single-sided comb-arranged SSPPs transport and radiation structure.
Preferably, the single-side comb-arranged SSPPs transmission and radiation structure is formed by an ultrathin PCB printing layer and is an end-fire antenna; the printed layer formed by PCB printing is smaller than a set thickness threshold.
Preferably, the SSPPs antenna reduces the profile of the antenna by a single-sided comb-shaped SSPPs transmission line structure, a radiation structure and a top SSPPs loading structure, and the antenna applies a wavelength shortening effect under the SPP theory, thereby effectively reducing the working wavelength of the antenna and achieving antenna miniaturization.
Preferably, the single-sided comb-shaped SSPPs antenna is radio frequency excited by the SMA joints.
Preferably, the height of the SSPPs antenna is kept constant in the transmission part, and the height of the radiation part is gradually changed from high to low.
Preferably, the tail end of the top SSPPs loading structure can be extended towards two sides and bent downwards by 90 degrees, and when the tail end is close to the ground, the tail end is bent by 90 degrees again, and is parallel to the ground, and a gap with a size smaller than a set threshold value is reserved between the tail end and the ground, so that the top SSPPs loading structure can be used for tail end equivalent capacitance loading tuning.
Preferably, the method comprises the following steps: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint; the SSPPs transmission and radiation structures are uniformly distributed above the floor; the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure; the top SSPPs loading structure is parallel to the floor plane; the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement; the SMA connector feeds the SSPPs antenna; the SSPPs transmission and radiation structure is a single-side comb-shaped SSPPs transmission and radiation structure; the SSPPs transmission and radiation structure with the unilateral comb-shaped arrangement is formed by adopting an ultrathin PCB printing layer and is an end-fire antenna; the printed layer formed by PCB printing is smaller than a set thickness threshold; the SSPPs antenna reduces the section of the antenna through a unilateral comb-shaped SSPPs transmission line structure, a radiation structure and a top SSPPs loading structure, and the antenna applies a wavelength shortening effect under the SPP theory, so that the working wavelength of the antenna is effectively reduced, and the miniaturization of the antenna is achieved; carrying out radio frequency excitation on the single-side comb-shaped SSPPs antenna through the SMA joint; the height of the SSPPs antenna is kept constant in the transmission part, and the height of the radiation part is gradually changed from high to low; the tail end of the top SSPPs loading structure can be extended towards two sides and bent downwards for 90 degrees, the tail end is bent for 90 degrees when approaching the ground and is parallel to the ground, a gap with the size smaller than a set threshold value is reserved between the tail end and the ground, and the top SSPPs loading structure can be used for loading and tuning of a tail end equivalent capacitor.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can effectively reduce the working wavelength of the antenna by combining the wavelength shortening effect of the SSPPs theory, thereby realizing the purpose of miniaturization.
2. The invention reduces the profile of the antenna by the SSPPs transmission and radiation structure in unilateral comb arrangement and the top SSPPs loading structure.
3. The invention reduces the antenna profile by half by applying the mirror image principle.
4. The antenna main body of the invention is a PCB printing plate, and the structure is simple and easy to process.
5. According to the invention, the composite structure of the SSPPs transmission and radiation structure in unilateral comb-shaped arrangement and the SSPPs loading structure at the top is introduced to form the multiband antenna, and the multiband antenna can work in three frequency bands of 412-470 MHz, 1.13-1.36 GHz and 1.45-1.68 GHz.
6. The invention can carry out circular ring array on a plurality of low-profile vertical polarization end-fire antennas based on artificial surface plasmon structures, thereby realizing omnidirectional radiation.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a 3D schematic diagram of a low-profile vertically polarized end-fire antenna based on an artificial surface plasmon structure.
Fig. 2 is a schematic front view of a low-profile vertical polarization end-fire antenna structure based on an artificial surface plasmon structure.
Fig. 3 is a schematic rear view of a monolithic structure in a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure.
Fig. 4 is a schematic top view of a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure.
Fig. 5 is a return loss diagram of a low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure.
Fig. 6 is a schematic diagram of a first horizontal plane direction at 450MHz and 1.6GHz for a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure.
Fig. 7 is a second horizontal plane direction schematic diagram of a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure at 450MHz and 1.6 GHz.
Fig. 8 is an array diagram of a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure and a schematic diagram of a first horizontal omnidirectional direction generated by simultaneous operation of all ports.
Fig. 9 is an array diagram of a low-profile vertically polarized end-fire antenna based on an artificial surface plasmon structure and a schematic diagram of a second horizontal omnidirectional direction generated by simultaneous operation of all ports.
Fig. 10 is a schematic diagram showing a modified form of a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure.
Fig. 11 is a schematic front view of a modified form of an artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna.
Fig. 12 is a schematic top view of a modified form of an artificial surface plasmon structure based low-profile, vertically polarized endfire antenna.
Fig. 13 is a side view schematic diagram of a modified form of an artificial surface plasmon structure based low-profile, vertically polarized end-fire antenna.
Fig. 14 is a diagram showing simulation return loss results of a modified low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure.
Fig. 15 is a schematic diagram of the direction of a modified form of an artificial surface plasmon structure-based low-profile vertically polarized endfire antenna at 450 MHz.
In the figure:
top SSPPs loading structure with I being metal sheet III as antenna
II is medium FR-4 IV and is SMA feed head
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
According to the invention, the invention provides 1, a low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure, which is characterized by comprising: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint; the SSPPs transmission and radiation structures are uniformly distributed above the floor; the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure; the top SSPPs loading structure is parallel to the floor plane; the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement; the SMA connector feeds the SSPPs antenna.
Preferably, the SSPPs transport and radiation structure is a single-sided comb-arranged SSPPs transport and radiation structure.
Preferably, the single-side comb-arranged SSPPs transmission and radiation structure is formed by an ultrathin PCB printing layer and is an end-fire antenna; the printed layer formed by PCB printing is smaller than a set thickness threshold.
Preferably, the SSPPs antenna reduces the profile of the antenna by a single-sided comb-shaped SSPPs transmission line structure, a radiation structure and a top SSPPs loading structure, and the antenna applies a wavelength shortening effect under the SPP theory, thereby effectively reducing the working wavelength of the antenna and achieving antenna miniaturization.
Preferably, the single-sided comb-shaped SSPPs antenna is radio frequency excited by the SMA joints.
Preferably, the height of the SSPPs antenna is kept constant in the transmission part, and the height of the radiation part is gradually changed from high to low.
Preferably, the tail end of the top SSPPs loading structure can be extended towards two sides and bent downwards by 90 degrees, and when the tail end is close to the ground, the tail end is bent by 90 degrees again, and is parallel to the ground, and a gap with a size smaller than a set threshold value is reserved between the tail end and the ground, so that the top SSPPs loading structure can be used for tail end equivalent capacitance loading tuning.
Preferably, the method comprises the following steps: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint; the SSPPs transmission and radiation structures are uniformly distributed above the floor; the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure; the top SSPPs loading structure is parallel to the floor plane; the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement; the SMA connector feeds the SSPPs antenna; the SSPPs transmission and radiation structure is a single-side comb-shaped SSPPs transmission and radiation structure; the SSPPs transmission and radiation structure with the unilateral comb-shaped arrangement is formed by adopting an ultrathin PCB printing layer and is an end-fire antenna; the printed layer formed by PCB printing is smaller than a set thickness threshold; the SSPPs antenna reduces the section of the antenna through a unilateral comb-shaped SSPPs transmission line structure, a radiation structure and a top SSPPs loading structure, and the antenna applies a wavelength shortening effect under the SPP theory, so that the working wavelength of the antenna is effectively reduced, and the miniaturization of the antenna is achieved; carrying out radio frequency excitation on the single-side comb-shaped SSPPs antenna through the SMA joint; the height of the SSPPs antenna is kept constant in the transmission part, and the height of the radiation part is gradually changed from high to low; the tail end of the top SSPPs loading structure can be extended towards two sides and bent downwards for 90 degrees, the tail end is bent for 90 degrees when approaching the ground and is parallel to the ground, a gap with the size smaller than a set threshold value is reserved between the tail end and the ground, and the top SSPPs loading structure can be used for loading and tuning of a tail end equivalent capacitor.
Specifically, in one embodiment, referring to fig. 1 to 4, the present invention provides a low-profile vertically polarized endfire antenna using an artificial surface plasmon-based structure, including: the device comprises a single-side comb-shaped SSPPs transmission and radiation structure, a top SSPPs loading structure, an SMA joint, an FR-4 dielectric layer and metal columns with the same height.
The antenna radiation structure is a low-profile vertical polarization end-fire antenna based on an artificial surface plasmon structure in fig. 1. And performing coupling feed through a metal microstrip line on the back of the antenna, and performing radio frequency excitation on the SMA joint. Further, the antenna radiation structure is a comb-shaped SSPPs structure. In FIG. 1, the antenna is 367mm long, 61mm high and 150mm wide.
The omnidirectional working principle of the invention is as follows:
fig. 1 is a 3D diagram of a low-profile vertically polarized endfire antenna based on an artificial surface plasmon structure in accordance with the present invention. The radio frequency excitation signal SMA connects and feeds the antenna from one side of the SSPPs antenna of unilateral comb shape, thus can feed each end-fire antenna independently, the signal passes through the comb-tooth structure of figure 2 and passes the electromagnetic wave from the traditional transmission mode to the SSPPs mode gradually, thus the size of the antenna is reduced effectively, and the radiation efficiency of the antenna is improved.
Fig. 3 shows the back of the single-piece single-sided comb SSPPs antenna of the present embodiment.
Fig. 4 shows another feeding manner of this embodiment, and the same radiation effect can be achieved by using a feedback structure.
Fig. 5 shows a return loss diagram obtained by simulation in the present embodiment.
Fig. 6 and 7 show simulated radiation patterns of the SSPPs antenna with single-sided comb shape in this embodiment at 450MHz and 1.6 GHz.
As shown in fig. 8, the present embodiment may form a circular array to implement omnidirectional radiation, and fig. 8 is a quaternary array, or may form an 8-element array, a 16-element array, and the like as required.
An ideal omni-directional radiation pattern at 1.6GHz is shown in figure 9 for this embodiment.
Fig. 10 shows a modified form of the front antenna, referred to as embodiment 2, in which the load carrying capability is enhanced by extending the SSPPs structure in the vertical direction, and the operating frequency band of the antenna is 408.6-474.3 MHz.
As shown in fig. 11 to 13, there are a front view, a plan view and a side view of embodiment 2.
Fig. 14 shows the simulated return loss results of example 2.
Fig. 15 shows the pattern at 450MHz for example 2.
Specifically, in one embodiment, the load-bearing capacity of the top SSPPs loaded structure is enhanced by extending the structure in the vertical direction, and the operating frequency band of the antenna is 408.6-474.3 MHz.
The invention can effectively reduce the working wavelength of the antenna by combining the wavelength shortening effect of the SSPPs theory, thereby realizing the purpose of miniaturization. The invention reduces the profile of the antenna by the SSPPs transmission and radiation structure in unilateral comb arrangement and the top SSPPs loading structure. The invention reduces the antenna profile by half by applying the mirror image principle. The antenna main body of the invention is a PCB printing plate, and the structure is simple and easy to process. According to the invention, the composite structure of the SSPPs transmission and radiation structure in unilateral comb-shaped arrangement and the SSPPs loading structure at the top is introduced to form the multiband antenna, and the multiband antenna can work in three frequency bands of 412-470 MHz, 1.13-1.36 GHz and 1.45-1.68 GHz. The invention can carry out circular ring array on a plurality of low-profile vertical polarization end-fire antennas based on artificial surface plasmon structures, thereby realizing omnidirectional radiation.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. The utility model provides a low section vertical polarization end fire antenna based on artifical surface plasmon structure which characterized in that includes: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint;
the SSPPs transmission and radiation structures are uniformly distributed above the floor;
the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure;
the top SSPPs loading structure is parallel to the floor plane;
the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement;
the SMA connector feeds the SSPPs antenna.
2. The artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna of claim 1,
the SSPPs transmission and radiation structure is a single-side comb-shaped SSPPs transmission and radiation structure.
3. The artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna of claim 2, wherein the single-sided comb-arranged SSPPs transmission and radiation structure is formed by a PCB printed layer;
the printed layer formed by PCB printing is smaller than a set thickness threshold.
4. The artificial surface plasmon based low-profile vertically polarized end-fire antenna of claim 2, wherein said SSPPs antenna reduces the profile of the antenna by a single-sided comb-like SSPPs transmission line structure and radiating structure and a top SSPPs loading structure.
5. The artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna of claim 2, wherein the single-sided comb-like SSPPs antenna is rf excited by an SMA joint.
6. The artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna of claim 1, wherein the height of said SSPPs antenna is constant in the transmission section and the height of the radiation section is gradually changed from high to low.
7. The artificial surface plasmon structure-based low-profile vertically polarized end-fire antenna according to claim 4, wherein the end of the top SSPPs loading structure can be extended to two sides and bent downward by 90 degrees, and the end is bent by 90 degrees again when approaching the ground, is parallel to the ground, and has a gap with a size smaller than a set threshold value with the ground.
8. The utility model provides a low section vertical polarization end fire antenna based on artifical surface plasmon structure which characterized in that includes: the device comprises a microstrip line excitation structure, an SSPPs transmission and radiation structure, a top SSPPs loading structure, a dielectric layer and an SMA joint;
the SSPPs transmission and radiation structures are uniformly distributed above the floor;
the top SSPPs loading structure is directly connected with the SSPPs transmission and radiation structure;
the top SSPPs loading structure is parallel to the floor plane;
the SMA joint is positioned on the left side of the SSPPs antenna in unilateral comb-shaped arrangement;
the SMA connector feeds the SSPPs antenna;
the SSPPs transmission and radiation structure is a single-side comb-shaped SSPPs transmission and radiation structure;
the SSPPs transmission and radiation structure with the single-side comb-shaped arrangement is formed by adopting a PCB printing layer;
the printed layer formed by PCB printing is smaller than a set thickness threshold;
the SSPPs antenna reduces the profile of the antenna through a single-side comb-shaped SSPPs transmission line structure, a radiation structure and a top SSPPs loading structure;
carrying out radio frequency excitation on the single-side comb-shaped SSPPs antenna through the SMA joint;
the height of the SSPPs antenna is kept constant in the transmission part, and the height of the radiation part is gradually changed from high to low;
the tail end of the top SSPPs loading structure can be extended towards two sides and bent downwards for 90 degrees, the tail end is bent for 90 degrees when approaching the ground and is parallel to the ground, and a gap with the size smaller than a set threshold value is reserved between the tail end and the ground.
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| CN111262024B (en) | 2022-05-31 |
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