CN113036417A - Slot structure notch antenna with rectangular slots and gateway equipment - Google Patents
Slot structure notch antenna with rectangular slots and gateway equipment Download PDFInfo
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- CN113036417A CN113036417A CN202110284651.8A CN202110284651A CN113036417A CN 113036417 A CN113036417 A CN 113036417A CN 202110284651 A CN202110284651 A CN 202110284651A CN 113036417 A CN113036417 A CN 113036417A
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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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
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Abstract
The invention discloses a notch antenna with a rectangular slotted slot structure and gateway equipment, which comprise a dielectric substrate, wherein an antenna radiation unit is arranged on the upper surface of the dielectric substrate, the antenna radiation unit comprises a radiation patch and a microstrip feeder line connected with the bottom opening end of the radiation patch, and two L-shaped slots are formed in the surface of the radiation patch; the lower surface of the dielectric substrate is used for grounding, the lower surface of the dielectric substrate is provided with a special-shaped slot, the special-shaped slot comprises a plurality of rectangular slots, one end or two ends of the rectangular slots are connected with each other according to a rule, and the relative positions of the special-shaped slot and the antenna radiation unit on the upper surface of the dielectric substrate are at least partially overlapped. Based on this scheme, can promote the filtering performance of antenna, reduce gateway device's filtering pressure, reduce cost improves data transmission stability.
Description
The present application is a divisional application of an invention patent application filed in 2019, 8, 9, and having an application number of 201910733766.3 and an invention name of "a notch antenna with a slot structure and a gateway device having the same", which is incorporated by reference in its entirety.
Technical Field
The application relates to the technical field of wireless communication, in particular to a notch antenna with a rectangular slotted slot structure and gateway equipment.
Background
The radio frequency signal power output by the radio transmitter is transmitted to the antenna through a feeder (cable) and radiated out by the antenna in the form of electromagnetic waves. After the electromagnetic wave reaches the receiving location, it is passed on by the antenna (receiving only a small portion of the power) and fed to the radio receiver via the feeder. It can be seen that an antenna is an important radio device for transmitting and receiving electromagnetic waves, and that there is no antenna and no radio communication. With the development of communication technology, wireless communication devices such as mobile phones, personal digital assistants, and notebook computers have been widely used, and these wireless communication devices receive and transmit wireless signals through antennas.
As more and more wireless communication devices are used, the surrounding environment of the wireless communication devices is more and more noisy, and when the antenna is in a noisy external environment, the ability of the antenna to transmit and receive signals is often reduced due to interference.
On the other hand, a gateway device, also called an internetwork connector or a protocol converter, is a computer system or device that provides data conversion services among a plurality of networks, and a gateway device is a connector between different networks, that is, a device that data needs to go through "negotiation" when going from one network to another network. Taking an LoRa Gateway device as an example, LoRa is a technology dedicated to radio modem, and it uses a chirp spread spectrum modulation technology, which not only maintains the same low power consumption characteristics as FSK (frequency shift keying) modulation, but also significantly increases the communication distance, and at the same time improves the network efficiency and eliminates interference, i.e. terminals of different spreading sequences will not interfere with each other even if they use the same frequency to transmit simultaneously, so the Concentrator/Gateway (Concentrator/Gateway) developed on this basis can receive and process data of multiple nodes in parallel, and greatly expands the system capacity.
In the prior art, with the increasing requirements of various services and frequencies, the gateway device (e.g., LoRa gateway device) antenna is required to have more stable data signal transmission performance, however, the conventional antenna is very susceptible to the influence of filtering pressure, and the conventional antenna has a complex structure, occupies a large space, and is high in cost, so that the conventional gateway device antenna has the problems of poor filtering performance, unstable data transmission, and being not beneficial to the wide application of the LoRa technology.
Disclosure of Invention
The invention aims to provide a notch antenna with a rectangular slotted slot structure and gateway equipment aiming at the defects of the prior art so as to achieve the purposes of improving the filtering performance of the antenna, reducing the filtering pressure of the gateway equipment, reducing the cost and improving the data transmission stability.
The embodiment of the application adopts the following technical scheme:
the embodiment of the application provides a notch antenna with a rectangular slotted slot structure, which comprises a dielectric substrate, wherein an antenna radiation unit is arranged on the upper surface of the dielectric substrate, the antenna radiation unit comprises a radiation patch and a microstrip feeder connected with the bottom open end of the radiation patch, two L-shaped slots are formed in the surface of the radiation patch, the two L-shaped slots are symmetrically arranged along the vertical central line of the radiation patch, the two L-shaped slots are used for generating notches of two frequency bands, the central frequency of the notches is controlled by the equivalent length of the slots, a varactor is respectively bridged in the middle of each L-shaped slot, and when the capacitance value of the varactor is changed, the equivalent length of the two L-shaped slots is changed along with the notches;
the antenna radiation unit comprises a dielectric substrate, a conductor layer, a special-shaped slot, a plurality of rectangular slots and a plurality of antenna radiation units, wherein the conductor layer is arranged on the lower surface of the dielectric substrate and is attached to the whole lower surface of the dielectric substrate;
the special-shaped slots comprise two rectangular slots, namely a first rectangular slot and a second rectangular slot, wherein the first rectangular slot and the second rectangular slot are arranged in a T shape; the first rectangular slot is perpendicular to the bottom edge of the conductor layer on the lower surface of the medium substrate, one end of the first rectangular slot is tangent to the bottom edge of the conductor layer on the lower surface of the medium substrate, the other end of the first rectangular slot is perpendicular to the second rectangular slot, the second rectangular slot is parallel to the bottom edge of the conductor layer on the lower surface of the medium substrate, and a certain distance is reserved between the joint of the first rectangular slot and the second rectangular slot and the middle of the second rectangular slot.
Furthermore, the dielectric substrate is rectangular, and is an insulating substrate made of epoxy resin glass fiber.
Further, the radiation sheet is in a regular hexagonal structure, a rectangular structure or a circular structure.
Furthermore, the lower end of the microstrip feeder line extends downwards and is communicated with the bottom edge of the upper surface of the dielectric substrate.
Further, the L-shaped slits comprise two slits, namely a long-side slit and a short-side slit, and the length of the short-side slit is 1/2 or 1/4 of the length of the long-side slit.
The embodiment of the application further provides gateway equipment, which comprises a case, wherein a wireless transceiver module, a data processing module, a data storage module, a control module and an antenna interface module are installed in the case, the antenna interface module is connected with an antenna through a circuit, and the antenna adopts the slot structure notch antenna with the rectangular slot.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the notch antenna with the rectangular slotted slot structure comprises a dielectric substrate, wherein an antenna radiation unit is arranged on the upper surface of the dielectric substrate and comprises a radiation patch and a microstrip feeder line connected with the bottom opening end of the radiation patch, two L-shaped slots are formed in the surface of the radiation patch, and the two L-shaped slots are symmetrically arranged along the vertical central line of the radiation patch; the lower surface of the dielectric substrate is used for grounding, the lower surface of the dielectric substrate is provided with a special-shaped slot, the special-shaped slot comprises a plurality of rectangular slots, one end or two ends of the rectangular slots are connected with each other according to a rule, one end of at least one rectangular slot in the special-shaped slot extends to the bottom edge of the lower surface of the dielectric substrate and is tangent to the bottom edge, and the relative positions of the special-shaped slot and the antenna radiation unit on the upper surface of the dielectric substrate are at least partially overlapped. Based on this scheme, can promote the filtering performance of antenna, reduce gateway device's filtering pressure, reduce cost improves data transmission stability.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and for those skilled in the art, other drawings can be derived based on the drawings without inventive exercise.
Fig. 1 is a schematic top surface structure of a notch antenna with a slot structure having a rectangular slot according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a bottom surface structure of a notch antenna with a slot structure having a rectangular slot according to an embodiment of the present disclosure;
fig. 3 is a schematic bottom surface structure diagram of a notch antenna with a slot structure having a rectangular slot according to a second embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present disclosure without making any creative effort, shall fall within the protection scope of the present disclosure.
Fig. 1 is a schematic top surface structure diagram of a slot structure notch antenna with a rectangular slot according to an embodiment of the present disclosure, where the slot structure notch antenna with a rectangular slot mainly includes:
the antenna comprises a dielectric substrate 1, wherein an antenna radiation unit 2 is arranged on the upper surface of the dielectric substrate 1, the antenna radiation unit 2 comprises a radiation patch 21 and a microstrip feeder 22 connected with the bottom opening end of the radiation patch 21, two L-shaped gaps 3 are formed in the surface of the radiation patch 21, and the two L-shaped gaps 3 are symmetrically arranged along the vertical central line of the radiation patch 21.
Further, the dielectric substrate 1 has a rectangular shape, that is, a rectangular dielectric substrate, and the dielectric substrate 1 may be an insulating substrate made of a dielectric material such as epoxy resin glass fiber.
In practical applications, the antenna radiation unit 2 may be a copper-clad layer printed on the upper surface of the dielectric substrate, and at this time, the antenna radiation unit 2 may be divided into a plurality of copper-clad strips through two "L" shaped slits opened on the surface of the radiation patch. The antenna radiation unit 2 is located in the middle of the upper surface of the dielectric substrate, and the rest parts of the antenna radiation unit 2 are not in contact with the peripheral edge of the dielectric substrate 1 except the lower end of the microstrip feeder 22 is in contact with the bottom edge of the dielectric substrate 1.
Further, the radiation patch 21 may have a regular hexagonal structure, a rectangular structure, or a circular structure, in the first embodiment of the present specification, a radiation patch having a hexagonal structure with a chamfered periphery is preferably used, and the radiation patch 21 may be made of a rectangular metal sheet.
Further, the lower end of the microstrip feed line 22 extends downward and is communicated with the bottom edge of the upper surface of the dielectric substrate 1. The antenna may be fed to a hexagonal antenna radiating element structure using a microstrip feed 22.
In the embodiment of the present specification, the "L" -shaped slit 3 includes two slits, which are a long-side slit and a short-side slit, respectively, and the length of the short-side slit is 1/2 or 1/4 of the length of the long-side slit, and the widths of the long-side slit and the short-side slit may be the same. In a practical application scenario, the two "L" shaped slots 3 can be equivalent to resonators, and can generate notches of two frequency bands, and the equivalent length of the slot controls the center frequency of the notch. In addition, a varactor diode can be connected between the two L-shaped gaps 3 in a bridging manner, and the capacitance value of the varactor diode can be changed by changing the voltage, so that the equivalent length of the gaps can be changed.
Fig. 2 is a schematic bottom surface structure diagram of a slot structure notch antenna with a rectangular slot according to an embodiment of the present disclosure, where the slot structure notch antenna with a rectangular slot mainly includes:
the lower surface of the dielectric substrate 1 is used for grounding, the lower surface of the dielectric substrate 1 is provided with a special-shaped slot 4, the special-shaped slot 4 comprises a plurality of rectangular slots, one end or two ends of the rectangular slots are connected with each other according to a rule, one end of at least one rectangular slot in the special-shaped slot 4 extends to the bottom edge of the lower surface of the dielectric substrate 1 and is tangent to the bottom edge, and the relative positions of the special-shaped slot 4 and the antenna radiation unit 2 on the upper surface of the dielectric substrate 1 are at least partially overlapped.
In the embodiment of the present specification, the special-shaped slot 4 may adopt a hollowed-out structure, and the plurality of rectangular slots may be a plurality of hollowed-out sections; the relative position of the special-shaped slot 4 and the antenna radiation unit 2 on the upper surface of the dielectric substrate 1 is at least partially overlapped, which means that the orthographic projection view of the special-shaped slot 4 and the orthographic projection view of the antenna radiation unit 2 are partially overlapped.
In practical application, the lower surface of the dielectric substrate 1 may be provided with a conductive layer, the conductive layer is a metal plating layer, and the conductive layer is attached to the entire lower surface of the dielectric substrate 1; at this time, the irregular open groove 4 is opened on the surface of the conductor layer. The conductor layer, which may also be referred to as a ground plane, is used to provide ground for the notch antenna.
Further, in the first embodiment of the present specification, the special-shaped slot 4 includes four rectangular slots, namely a first rectangular slot 41, a second rectangular slot 42, a third rectangular slot 43, and a fourth rectangular slot 44; one end of the first rectangular open groove 41 is tangent to the bottom edge of the lower surface of the dielectric substrate 1, the other end of the first rectangular open groove 41 extends vertically upwards, and bends and extends right after extending to a specific distance to form a second rectangular open groove 42, the second rectangular open groove 42 is parallel to the bottom edge of the lower surface of the dielectric substrate 1, the second rectangular open groove 42 extends along the horizontal direction, and bends and extends downwards after extending to a specific distance to form a third rectangular open groove 43, the third rectangular open groove 43 is arranged in parallel with the first rectangular open groove 41, the length of the third rectangular open groove 43 is smaller than that of the first rectangular open groove 41, the tail end of the third rectangular open groove 43 bends and extends left to form a fourth rectangular open groove 44, and the length of the fourth rectangular open groove 44 is smaller than that of the second rectangular open groove 42.
In the first embodiment of the present specification, the special-shaped slot 4 is a zigzag belt-shaped structure, in practical application, the lengths and widths of the first rectangular slot 41, the second rectangular slot 42, the third rectangular slot 43, and the fourth rectangular slot 44 can be adjusted according to practical needs, and the widths of the first rectangular slot 41, the second rectangular slot 42, the third rectangular slot 43, and the fourth rectangular slot 44 can be all the same.
The notch antenna of the embodiment of the present description can also generate resonance modes at low frequency and high frequency, respectively, so as to operate in multiple frequency bands, and directly participate in coupling through the entire conductive layer for grounding, without additionally providing a radiator, thereby effectively increasing the antenna bandwidth and reducing the size of the antenna, achieving the purpose of reducing the manufacturing cost of the antenna, and facilitating the miniaturization of the wireless communication device.
Fig. 3 is a schematic bottom surface structure diagram of a slot structure notch antenna with a rectangular slot according to a second embodiment of the present disclosure, where the slot structure notch antenna with a rectangular slot mainly includes:
the special-shaped slot 4 comprises two rectangular slots, namely a first rectangular slot 41 and a second rectangular slot 42, wherein the first rectangular slot 41 and the second rectangular slot 42 are arranged in a T shape; the first rectangular slot 41 is perpendicular to the bottom edge of the lower surface of the medium substrate 1, one end of the first rectangular slot 41 is tangent to the bottom edge of the lower surface of the medium substrate 1, the other end of the first rectangular slot 41 is perpendicular to the second rectangular slot 42, the second rectangular slot 42 is parallel to the bottom edge of the lower surface of the medium substrate 1, and a certain distance is reserved between the joint of the first rectangular slot 41 and the second rectangular slot 42 and the middle of the second rectangular slot 42.
Further, in the second embodiment of the present disclosure, the special-shaped slot 4 adopts a "T" shaped structural design, and certainly, in practical applications, the special-shaped slot 4 may also adopt an "F" shaped, circular, U-shaped and other structural designs, and the change in the shape does not affect the implementation of the technical solution of the present disclosure, and the change in the simple shape also should fall into the protection scope of the present disclosure.
In practical applications, the combining position between the first rectangular slot 41 and the second rectangular slot 42 can be adjusted according to the requirements of the corresponding matching and resonant frequency bands.
It should be noted that, compared with the first embodiment, the second embodiment in this specification is different from the first embodiment in that the structure of the special-shaped slot 4 only located on the lower surface is different, that is, the special-shaped slot 4 of the first embodiment is in a zigzag strip-shaped structure, and the special-shaped slot 4 of the second embodiment is in a "T" shaped structure.
The above description mainly introduces the upper and lower surface structures of the notch antenna with a slot structure having a rectangular slot in the embodiment of the present specification, and correspondingly, the present specification also provides a specific application scenario of the notch antenna with a slot structure having a rectangular slot. An embodiment of the present specification provides a gateway device, which mainly includes:
the antenna comprises a case, wherein a wireless transceiving module, a data processing module, a data storage module, a control module and an antenna interface module are arranged in the case, the antenna interface module is connected with an antenna through a circuit, and the antenna adopts the notch antenna with the rectangular slotted slot structure.
It should be noted that the main inventive point of the present invention is a notch antenna with a slot structure having a rectangular slot, and the gateway device is a practical application scenario of the notch antenna with a slot structure having a rectangular slot, but the notch antenna with a slot structure having a rectangular slot of the present invention is not limited to be installed in the gateway device, for example: the wireless communication device can be applied to mobile phones, tablet computers and other wireless communication devices.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. A notch antenna with a rectangular slotted slot structure is characterized in that: the antenna comprises a dielectric substrate, wherein an antenna radiation unit is arranged on the upper surface of the dielectric substrate and comprises a radiation patch and a microstrip feeder line connected with the bottom open end of the radiation patch, two L-shaped slots are formed in the surface of the radiation patch and symmetrically arranged along the vertical central line of the radiation patch, the two L-shaped slots are used for generating trapped waves of two frequency bands, the equivalent length of each slot controls the central frequency of the trapped wave, a varactor is bridged between each two L-shaped slots, and when the capacitance value of the varactor is changed, the equivalent length of each two L-shaped slots is changed;
the antenna radiation unit comprises a dielectric substrate, a conductor layer, a special-shaped slot, a plurality of rectangular slots and a plurality of antenna radiation units, wherein the conductor layer is arranged on the lower surface of the dielectric substrate and is attached to the whole lower surface of the dielectric substrate;
the special-shaped slots comprise two rectangular slots, namely a first rectangular slot and a second rectangular slot, wherein the first rectangular slot and the second rectangular slot are arranged in a T shape; the first rectangular slot is perpendicular to the bottom edge of the conductor layer on the lower surface of the medium substrate, one end of the first rectangular slot is tangent to the bottom edge of the conductor layer on the lower surface of the medium substrate, the other end of the first rectangular slot is perpendicular to the second rectangular slot, the second rectangular slot is parallel to the bottom edge of the conductor layer on the lower surface of the medium substrate, and a certain distance is reserved between the joint of the first rectangular slot and the second rectangular slot and the middle of the second rectangular slot.
2. The slot structure notch antenna having a rectangular slot as claimed in claim 1, wherein: the dielectric substrate is rectangular and is an insulating substrate made of epoxy resin glass fibers.
3. The slot structure notch antenna having a rectangular slot as claimed in claim 1, wherein: the radiation patch is of a regular hexagonal structure, a rectangular structure or a circular structure.
4. The slot structure notch antenna having a rectangular slot as claimed in claim 1 or 2, wherein: the lower end of the microstrip feeder line extends downwards and is communicated with the bottom edge of the upper surface of the dielectric substrate.
5. The slot structure notch antenna having a rectangular slot as claimed in claim 1 or 4, wherein: the L-shaped slits comprise two slits, namely long-side slits and short-side slits, and the length of each short-side slit is 1/2 or 1/4 of the length of each long-side slit.
6. A gateway device, characterized by: the antenna comprises a case, wherein a wireless transceiving module, a data processing module, a data storage module, a control module and an antenna interface module are installed in the case, the antenna interface module is connected with an antenna through a circuit, and the antenna adopts the notch antenna with the rectangular slotted slot structure as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110284651.8A CN113036417A (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna with rectangular slots and gateway equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110284651.8A CN113036417A (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna with rectangular slots and gateway equipment |
| CN201910733766.3A CN110459866B (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna and gateway equipment with same |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910733766.3A Division CN110459866B (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna and gateway equipment with same |
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| CN113036417A true CN113036417A (en) | 2021-06-25 |
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| CN202110284651.8A Withdrawn CN113036417A (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna with rectangular slots and gateway equipment |
| CN201910733766.3A Active CN110459866B (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna and gateway equipment with same |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910733766.3A Active CN110459866B (en) | 2019-08-09 | 2019-08-09 | Slot structure notch antenna and gateway equipment with same |
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| CN116487890A (en) * | 2023-06-26 | 2023-07-25 | 广东工业大学 | Filtering patch antenna with high gain and high roll-off rate |
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| CN113871866A (en) * | 2021-09-07 | 2021-12-31 | 许昌许继软件技术有限公司 | PCB antenna |
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- 2019-08-09 CN CN202110284651.8A patent/CN113036417A/en not_active Withdrawn
- 2019-08-09 CN CN201910733766.3A patent/CN110459866B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116487890A (en) * | 2023-06-26 | 2023-07-25 | 广东工业大学 | Filtering patch antenna with high gain and high roll-off rate |
| CN116487890B (en) * | 2023-06-26 | 2023-09-12 | 广东工业大学 | Filtering patch antenna with high gain and high roll-off rate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110459866A (en) | 2019-11-15 |
| CN110459866B (en) | 2021-04-06 |
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Application publication date: 20210625 |