CN115473041A - Directional diagram reconfigurable antenna array with high-gain end-fire beams - Google Patents
Directional diagram reconfigurable antenna array with high-gain end-fire beams Download PDFInfo
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- CN115473041A CN115473041A CN202211114959.9A CN202211114959A CN115473041A CN 115473041 A CN115473041 A CN 115473041A CN 202211114959 A CN202211114959 A CN 202211114959A CN 115473041 A CN115473041 A CN 115473041A
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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
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0485—Dielectric resonator antennas
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Abstract
The invention belongs to the technical field of antennas, and particularly relates to a directional diagram reconfigurable antenna array with high-gain end-fire beams. The antenna comprises a dielectric substrate, a pair of high-gain directional diagram reconfigurable end-fire antennas printed on the upper surface of the dielectric substrate, a switchable feed structure and a rectangular metal ground printed on the lower surface of the dielectric substrate; the pair of high-gain directional diagram reconfigurable end-fire antennas are respectively connected with the switchable feed structure and are symmetrically arranged on the upper surface of the dielectric substrate by being vertical to the center line of the switchable feed structure; the pair of high-gain directional diagram reconfigurable end-fire antennas comprise dielectric resonators, metal dipoles, transmission lines and matching branches; the dielectric resonator is covered above the metal dipole; the switchable feed structure has six different working states from a first state to a sixth state, and the switching of six different high-gain end-fire beams is realized by changing the on-off states of four PIN diodes embedded in the switchable feed structure.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a directional diagram reconfigurable antenna array with high-gain end-fire beams.
Background
The directional diagram reconfigurable antenna is used as an efficient wave beam regulation and control scheme, can make up the defects of large size, high complexity and large loss of the traditional phased array to a great extent, and realizes wave beam regulation and control by a simple and compact structure. With the development of related technologies such as a PCB (printed circuit board) manufacturing technology, a switching technology and the like in recent years, more and more reconfigurable antennas realize the reconfiguration of antenna parameters by electrically changing the switching state by utilizing the loading of devices such as PIN (personal identification number) diodes, variable capacitance diodes, MEMS (micro-electromechanical systems) switches and the like, so that the application field of the reconfigurable technology is expanded. However, the existing pattern reconfigurable antenna generally has a defect in radiation performance, and taking an end-fire beam as an example, the end-fire beam provided by the existing pattern reconfigurable antenna has lower multi-gain and does not have a good front-to-back ratio.
In application scenarios such as tunnels, highways, vehicles, etc., bidirectional end-fire beam coverage is required to meet the communication requirements in both front and rear directions. The existing bidirectional endfire antenna is generally difficult to realize high-gain bidirectional endfire in a compact space, so that the effective communication distance is greatly limited. In addition, the fixed beam is highly susceptible to electromagnetic interference outside the target direction, resulting in reduced communication quality. In order to ensure the effective communication distance and the communication quality under the scene, the controllable end-fire wave beam capable of realizing bidirectional coverage cannot be replaced.
Disclosure of Invention
Aiming at the problems in the technology, the invention provides a directional diagram reconfigurable antenna array with high-gain end-fire beams. The invention aims to: the defects that the existing directional diagram reconfigurable end-fire antenna is poor in radiation performance and difficult to realize bidirectional end-fire coverage are overcome.
In order to achieve the purpose, the invention adopts the following technical scheme:
a directional diagram reconfigurable antenna array with high-gain end-fire beams comprises a dielectric substrate, a pair of high-gain directional diagram reconfigurable end-fire antennas printed on the upper surface of the dielectric substrate, a switchable feed structure and a rectangular metal ground printed on the lower surface of the dielectric substrate; the vertical projection plane of the switchable feed structure is on the plane of the rectangular metal ground; the pair of high-gain directional diagram reconfigurable end-fire antennas are respectively connected with the switchable feed structure and are symmetrically arrayed on the upper surface of the dielectric substrate in a vertical center line mode relative to the switchable feed structure; the pair of high-gain directional diagram reconfigurable end-fire antennas respectively comprise a dielectric resonator, a metal dipole, a transmission line and a matching branch section; the dielectric resonator is covered above the metal dipole; the metal dipoles, the transmission lines and the matching branches are symmetrically arranged around the central line of the dielectric substrate in the horizontal direction; one end of the transmission line is connected with the metal dipole; the other end of the transmission line is connected with the switchable feed structure; one side of the transmission line is connected with the matching branch knot; the switchable feed structure has six different working states from a first state to a sixth state, and the switching of six different high-gain end-fire beams is realized by changing the on-off states of four PIN diodes embedded in the switchable feed structure.
Further, as a preferable technical scheme of the invention, the shape of the dielectric resonator is cuboid, and the dielectric resonator works in TE 2δ1 And the mode and the metal dipole positioned below the mode form a pair of controllable electromagnetic dipoles so as to obtain a switchable high-gain endfire wave beam.
As a further preferable technical solution of the present invention, the switchable feeding structure includes a main transmission line, four coupling transmission lines symmetrically arranged in an array on two sides of the main transmission line, an input port, a first output port, a second output port, a third output port, and a fourth output port; one end of the main transmission line is open-circuited, and the other end of the main transmission line is connected with the input port through a section of thin metal wire; one end of the coupling transmission line is respectively connected to the corresponding first to fourth output ports through a bent thin line, and the other end of the coupling transmission line is connected to the first bonding pad through a blocking capacitor; the first bonding pad is connected with the grounding bonding pad through a PIN diode, the cathode of the PIN diode is connected to the grounding bonding pad, and the anode of the PIN diode is connected to the first bonding pad; and a choke inductor is connected between the first bonding pad and the second bonding pad, and a direct current power supply is connected at the second bonding pad and used for controlling the on-off of the corresponding PIN diode.
As a further preferred technical solution of the present invention, when a suitable forward bias voltage is applied to the second pad connected to the coupling transmission line, the corresponding PIN diode connected to the coupling transmission line is in a conducting state, and at this time, the first output port to the fourth output port connected to the coupling transmission line are conducted;
when no voltage is applied to the second bonding pad connected with the coupling transmission line, the corresponding PIN diode connected with the coupling transmission line is in a disconnection state, and the first output port to the fourth output port connected with the coupling transmission line are disconnected; by regulating and controlling the direct-current voltages applied to the four second pads, four states of only conducting any one of the first output port to the fourth output port, or conducting the first output port and the second output port which are positioned on the same side, a state of disconnecting the third output port and the fourth output port which are positioned on the other side, or conducting the third output port and the fourth output port which are positioned on the same side, and a state of disconnecting the first output port and the second output port which are positioned on the other side are realized.
Further, as a preferred technical scheme of the present invention, when the first output port is on and the second to fourth output ports are all off, the antenna array works in the first state, and the radiation pattern points to the direction θ ≈ 22 ° at this time; when the first output port is communicated with the second output port and the third output port is disconnected with the fourth output port, the antenna array works in a second state, and the radiation directional diagram points to a direction of theta approximately equal to 0 degree; when the second output port is connected and the first output port, the third output port and the fourth output port are disconnected, the antenna array works in a third state, and the radiation pattern points to a direction of theta (approximately equal to-22 degrees); when the third output port is switched on and the first output port, the second output port and the fourth output port are switched off, the antenna array works in a fourth state, and the radiation pattern points to a direction theta (theta) approximately equal to 158 degrees; when the third output port and the fourth output port are conducted and the first output port and the second output port are disconnected, the antenna array works in a fifth state, and the radiation pattern points to a direction theta approximately equal to 180 degrees; when the fourth output port is on and the first output port is disconnected from the third output port, the antenna array works in a state six, and the radiation pattern points to the direction of theta ≈ 158 degrees at the moment.
Further as a preferred technical scheme of the invention, the matching branch is an open type matching branch; the opening type matching branch knot is provided with an opening close to a right-angle edge of the transmission line and the switchable feed structure.
As a further preferable technical solution of the present invention, the length of the main transmission line is one half of the waveguide wavelength; the length of the coupled transmission line is a quarter of a waveguide wavelength.
Compared with the prior art, the directional diagram reconfigurable antenna array with the high-gain end-fire beam has the following technical effects by adopting the technical scheme:
the invention utilizes the binary antenna array with the reconfigurable directional diagram to respectively provide three high-gain end-fire beams pointing to different directions in the forward direction and the backward direction, thereby realizing the bidirectional high-gain end-fire beam coverage, well ensuring the forward and backward high-quality communication, avoiding the electromagnetic interference from other directions, and having good application potential in application scenes such as tunnels, roads, vehicle environments and the like.
Drawings
Fig. 1 is a schematic structural diagram of a directional diagram reconfigurable antenna array with a high-gain end-fire beam according to the present invention;
fig. 2 is a schematic structural diagram of a switchable feed structure in a directional diagram reconfigurable antenna array with a high-gain end-fire beam according to the present invention;
fig. 3 is a horizontal plane radiation pattern of a pattern reconfigurable antenna array with high-gain end-fire beams according to the present invention at a frequency of 4.9GHz in different states;
fig. 4 is a horizontal plane radiation pattern of a pattern reconfigurable antenna array with a high-gain end-fire beam according to the present invention at a frequency of 5.1GHz in different states;
fig. 5 is a graph of a change of reflection coefficient and main radiation direction gain with frequency of a directional diagram reconfigurable antenna array with a high-gain end-fire beam in different states according to the present invention;
in the figure, 1-dielectric substrate, 2-dielectric resonator, 3-metal dipole, 4-transmission line, 5-matching branch, 6-switchable feed structure, 61-main transmission line, 62-coupling transmission line, 63-bent thin line, 64-first pad, 65-ground pad, 66-second pad, 67-thin metal line, 7-rectangular metal ground, 8-input port, 681-first output port, 682-second output port, 683-third output port, 684-fourth output port.
Detailed Description
The present invention will be further explained with reference to the drawings so that those skilled in the art can more deeply understand the present invention and can carry out the present invention, but the present invention will be explained below by referring to examples, which are not intended to limit the present invention.
As shown in fig. 1, the pattern reconfigurable antenna array with high-gain end-fire beams according to the present invention includes a dielectric substrate 1, a pair of high-gain pattern reconfigurable end-fire antennas printed on the upper surface of the dielectric substrate 1, a switchable feeding structure 6, and a rectangular metal ground 7 printed on the lower surface of the dielectric substrate 1; the vertical projection plane of the switchable feed structure 6 is on the plane of the rectangular metal ground 7; the pair of high-gain directional diagram reconfigurable end-fire antennas are respectively connected with the switchable feed structure 6 and are symmetrically arrayed on the upper surface of the dielectric substrate 1 by taking the switchable feed structure 6 as a vertical center line; the pair of high-gain directional diagram reconfigurable end-fire antennas respectively comprise a dielectric resonator 2, a metal dipole 3, a transmission line 4 and a matching branch 5; the dielectric resonator 2 covers the metal dipole 3; the metal dipoles 3, the transmission lines 4 and the matching branches 5 are symmetrically arranged around the central line of the dielectric substrate 1 in the horizontal direction; one end of the transmission line 4 is connected with the metal dipole 3; the other end of the transmission line 4 is connected with a switchable feed structure 6; one side of the transmission line 4 is connected with a matching branch 5; the switchable feeding structure 6 has six different working states from a state one to a state six, and the switching of six different high-gain end-fire beams is realized by changing the on-off states of four PIN diodes embedded in the switchable feeding structure 6.
The dielectric resonator 2 is in the shape of a rectangular parallelepiped and operates in TE 2δ1 The mode, with the metal dipole 3 located therebelow, forms a pair of controllable electromagnetic dipoles to obtain a switchable high-gain endfire beam.
As shown in fig. 2, the switchable feeding structure 6 comprises a main transmission line 61, four coupled transmission lines 62 arranged symmetrically in an array on both sides of the main transmission line 61, an input port 8, a first output port 681, a second output port 682, a third output port 683 and a fourth output port 684; one end of the main transmission line 61 is open-circuited, and the other end is connected to the input port 8 through a section of thin metal wire 67; one end of the coupling transmission line 62 is connected to the corresponding first output port 681 to fourth output port 684 through the bent thin line 63, respectively, and the other end is connected to the first pad 64 through the dc blocking capacitor; the first bonding pad 64 is connected with the grounding bonding pad 65 through a PIN diode, the cathode of the PIN diode is connected with the grounding bonding pad 65, and the anode of the PIN diode is connected with the first bonding pad 64; a choke inductor is connected between the first bonding pad 64 and the second bonding pad 66, and a direct current power supply is connected to the second bonding pad 66 to control the on and off of the corresponding PIN diode.
When a proper forward bias voltage is applied to the second pad 66 connected to the coupling transmission line 62, the corresponding PIN diode connected to the coupling transmission line 62 is in a conducting state, and the first output port 681 to the fourth output port 684 connected to the coupling transmission line 62 are conducted; when no voltage is applied to the second pad 66 connected to the coupled transmission line 62, the corresponding PIN diode connected to the coupled transmission line 62 is in an off state, and the first output port 681 to the fourth output port 684 connected to the coupled transmission line 62 are disconnected; by regulating the dc voltage applied to the four second pads 66, four states of turning on only any one of the first output port 681 to the fourth output port 684, or a state in which the first output port 681 and the second output port 682 on the same side are turned on, and the third output port 683 and the fourth output port 684 on the other side are turned off, or a state in which the third output port 683 and the fourth output port 684 on the same side are turned on, and the first output port 681 and the second output port 682 on the other side are turned off are realized.
When the first output port 681 is turned on and the second output port 682 to the fourth output port 684 are turned off, the antenna array works in a first state, and the radiation pattern points to a direction theta which is approximately equal to 22 degrees; when the first output port 681 is connected with the second output port 682 and the third output port 683 is disconnected from the fourth output port 684, the antenna array works in a second state, and the radiation pattern points to a direction theta approximately equal to 0 degree; when the second output port 682 is switched on and the first output port 681, the third output port 683 and the fourth output port 684 are switched off, the antenna array works in a state three, and the radiation pattern points to a direction theta approximately equal to-22 degrees; when the third output port 683 is turned on and the first output port 681, the second output port 682 and the fourth output port 684 are turned off, the antenna array works in state four, and the radiation pattern points to the direction theta which is approximately equal to 158 degrees at the moment; when the third output port 683 and the fourth output port 684 are connected and the first output port 681 and the second output port 682 are disconnected, the antenna array works in a fifth state, and the radiation pattern points to a direction theta approximately equal to 180 degrees at the time; when the fourth output port 684 is turned on and the first output port 681 to the third output port 683 are turned off, the antenna array operates in the state six, and the radiation pattern points to the direction θ ≈ 158 °.
The matching branch 5 is an open type matching branch; the opening type matching branch is provided with an opening close to a right-angle edge of the transmission line 4 and the switchable feed structure 6. The length of the main transmission line 61 is one-half of the waveguide wavelength; the length of the coupled transmission line 62 is a quarter of the waveguide wavelength.
The horizontal plane radiation pattern of the pattern reconfigurable antenna array with the high-gain end-fire beam in the embodiment of the invention in different states is shown in fig. 3 and 4. Fig. 3 shows horizontal plane radiation patterns of the embodiment of the present invention in different states at a frequency of 4.9GHz, wherein peak gains of the six end-fire patterns are all greater than 8dBi, and front-to-back ratios are all greater than 15dB. Fig. 4 shows horizontal plane radiation patterns of the embodiment of the present invention in different states at a frequency of 5.1GHz, peak gains of the three end-fire patterns are also all greater than 8dBi, and front-to-back ratios are all greater than 15dB. The embodiment of the invention has better consistency at different frequency points in the band and can ensure excellent end-to-end radiation performance.
Fig. 5 shows the reflection coefficient and the main radiation direction gain as a function of frequency for different states of the embodiment of the invention. The working bandwidth of the embodiment of the invention is 12% (4.71-5.31 GHz), and the in-band gain is 7-8.8 dBi.
The invention utilizes the switchable feed structure 6 to excite a pair of high-gain directional diagrams reconfigurable end-fire antennas which are symmetrically arranged, and realizes the reconfiguration of a radiation directional diagram by switching the working state of the feed structure.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any person skilled in the art should be able to make equivalent changes and modifications without departing from the concept and principle of the present invention.
Claims (7)
1. The directional pattern reconfigurable antenna array with the high-gain end-fire beam is characterized by comprising a dielectric substrate (1), a pair of high-gain directional pattern reconfigurable end-fire antennas printed on the upper surface of the dielectric substrate (1), a switchable feed structure (6) and a rectangular metal ground (7) printed on the lower surface of the dielectric substrate (1); the vertical projection plane of the switchable feed structure (6) is on the plane of the rectangular metal ground (7); the pair of high-gain directional diagram reconfigurable end-fire antennas are respectively connected with the switchable feed structure (6) and are arranged on the upper surface of the dielectric substrate (1) in a symmetrical array mode by taking the switchable feed structure (6) as a vertical center line; the pair of high-gain directional diagram reconfigurable end-fire antennas respectively comprise a dielectric resonator (2), a metal dipole (3), a transmission line (4) and a matching branch (5); the dielectric resonator (2) covers the metal dipole (3); the metal dipoles (3), the transmission lines (4) and the matching branches (5) are symmetrically arranged relative to the central line of the dielectric substrate (1) in the horizontal direction; one end of the transmission line (4) is connected with the metal dipole (3); the other end of the transmission line (4) is connected with a switchable feed structure (6); one side of the transmission line (4) is connected with the matching branch (5); the switchable feed structure (6) has six different working states from a state one to a state six, and the switching of six different high-gain end-fire wave beams is realized by changing the on-off states of four PIN diodes embedded in the switchable feed structure (6).
2. The antenna array with reconfigurable directional diagram of high-gain end-fire beams as claimed in claim 1, wherein the dielectric resonators (2) are rectangular solids and operate at TE 2δ1 And the mode and the metal dipole (3) positioned below the mode form a pair of controllable electromagnetic dipoles so as to obtain a switchable high-gain endfire wave beam.
3. The pattern reconfigurable antenna array with the high-gain end-fire beam as claimed in claim 1, wherein the switchable feed structure (6) comprises a main transmission line (61), four coupling transmission lines (62) symmetrically arranged in an array on two sides of the main transmission line (61), an input port (8), a first output port (681), a second output port (682), a third output port (683), and a fourth output port (684); one end of the main transmission line (61) is open-circuited, and the other end of the main transmission line is connected with the input port (8) through a section of thin metal wire (67); one end of the coupling transmission line (62) is connected to the corresponding first output port (681) to the fourth output port (684) through a bent thin line (63), and the other end of the coupling transmission line is connected to the first bonding pad (64) through a blocking capacitor; the first bonding pad (64) is connected with the grounding bonding pad (65) through a PIN diode, the cathode of the PIN diode is connected with the grounding bonding pad (65), and the anode of the PIN diode is connected with the first bonding pad (64); a choke inductor is connected between the first bonding pad (64) and the second bonding pad (66), and a direct current power supply is connected to the second bonding pad (66) and used for controlling the on-off of the corresponding PIN diode.
4. The antenna array with reconfigurable pattern of high-gain end-fire beam according to claim 3, characterized in that when a suitable forward bias voltage is applied to the second bonding pad (66) connected to the coupled transmission line (62), the corresponding PIN diode connected to the coupled transmission line (62) is in a conducting state, and the first output port (681) to the fourth output port (684) connected to the coupled transmission line (62) are conducting;
when no voltage is applied to the second bonding pad (66) connected with the coupling transmission line (62), the corresponding PIN diode connected with the coupling transmission line (62) is in an off state, and the first output port (681) to the fourth output port (684) connected with the coupling transmission line (62) are disconnected;
by regulating and controlling the direct-current voltage applied to the four second bonding pads (66), four states of conducting any one of the first output port (681) to the fourth output port (684) only or conducting the first output port (681) and the second output port (682) on the same side are realized, when the third output port (683) and the fourth output port (684) on the other side are disconnected, or conducting the third output port (683) and the fourth output port (684) on the same side, and disconnecting the first output port (681) and the second output port (682) on the other side are realized.
5. The reconfigurable antenna array with the pattern of the high-gain end-fire beam as claimed in claim 4, wherein when the first output port (681) is turned on and the second output port (682) to the fourth output port (684) are turned off, the antenna array operates in a state one in which the radiation pattern points in a direction θ ≈ 22 °;
when the first output port (681) is connected with the second output port (682) and the third output port (683) is disconnected with the fourth output port (684), the antenna array works in a second state, and the radiation pattern points to the direction theta approximately equal to 0 degrees;
when the second output port (682) is connected and the first output port (681), the third output port (683) and the fourth output port (684) are disconnected, the antenna array works in a third state, and the radiation pattern points to a direction theta approximately equal to-22 degrees at the moment;
when the third output port (683) is conducted and the first output port (681), the second output port (682) and the fourth output port (684) are disconnected, the antenna array works in a fourth state, and the radiation pattern points to a direction theta which is approximately equal to 158 degrees at the moment;
when the third output port (683) is connected with the fourth output port (684) and the first output port (681) is disconnected with the second output port (682), the antenna array works in a fifth state, and the radiation pattern points to the direction theta (approximately equal to 180 degrees);
when the fourth output port (684) is conducted and the first output port (681) to the third output port (683) are disconnected, the antenna array works in a sixth state, and the radiation pattern points to the direction of theta ≈ 158 degrees at the moment.
6. The antenna array with reconfigurable pattern of high-gain end-fire beams according to claim 1, characterized in that the matching branches (5) are open-type matching branches; the opening type matching branch knot is provided with an opening close to a right-angle edge of the transmission line (4) and the switchable feed structure (6).
7. A pattern reconfigurable antenna array with high-gain end-fire beams according to claim 3, characterized in that the length of the main transmission line (61) is one half of the waveguide wavelength; the coupled transmission line (62) has a length of a quarter of a waveguide wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114959.9A CN115473041A (en) | 2022-09-14 | 2022-09-14 | Directional diagram reconfigurable antenna array with high-gain end-fire beams |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211114959.9A CN115473041A (en) | 2022-09-14 | 2022-09-14 | Directional diagram reconfigurable antenna array with high-gain end-fire beams |
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| CN115473041A true CN115473041A (en) | 2022-12-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683187A (en) * | 2023-06-25 | 2023-09-01 | 淮南联合大学(安徽广播电视大学淮南分校淮南职工大学) | Antenna based on reconfigurable floor broadband low-profile directional diagram diversity and design method |
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2022
- 2022-09-14 CN CN202211114959.9A patent/CN115473041A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683187A (en) * | 2023-06-25 | 2023-09-01 | 淮南联合大学(安徽广播电视大学淮南分校淮南职工大学) | Antenna based on reconfigurable floor broadband low-profile directional diagram diversity and design method |
| CN116683187B (en) * | 2023-06-25 | 2024-05-17 | 淮南联合大学(安徽广播电视大学淮南分校淮南职工大学) | Antenna based on reconfigurable floor broadband low-profile directional diagram diversity and design method |
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