Broadband array antenna
By setting longitudinal radiation grooves and transverse radiation grooves on broadband array antennas and using ceramic parasitic sheets, the problem of narrow operating bandwidth in the prior art is solved, wider frequency bands and higher polarization purity are achieved, and amplified The performance and anti-interference ability of the antenna are achieved.
Patent Information
- Application Number
- CN202420922600.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The operating bandwidth of existing broadband array antennas is relatively narrow, making it difficult to meet the high reliability and high power requirements in complex environments.
By evenly opening longitudinal radiation grooves and transverse radiation grooves on the radiation sheet and setting them in cross shape, the ceramic parasitic sheet is added to reduce the quality factor of the microstrip radiation structure, extend the circuit distribution path, constrain the current distribution, form a broadband design, and suppress miscellaneous scatter signals and radiation.
The operating frequency bandwidth of the broadband radiation unit is expanded, the polarization purity and cross-polarization suppression ratio of the radiation field are improved, the performance and anti-interference ability of the antenna are enhanced, and the goals of miniaturization and high reliability are achieved.
Smart Images
Figure CN222146588U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of antennas, in particular to a wide-band array antenna. Background Art
[0002] Antenna is a converter that converts the guided waves propagating on the transmission line into electromagnetic waves propagating in an unbounded medium (usually free space), or vice versa. It is a component used to transmit or receive electromagnetic waves in radio equipment. Engineering systems such as radio communications, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, radio astronomy, etc., all rely on antennas to work when using electromagnetic waves to transmit information. In addition, in terms of transmitting energy with electromagnetic waves, non-signal energy radiation also requires antennas. Generally, antennas are reversible, that is, the same antenna can be used as both a transmitting antenna and a receiving antenna. The basic characteristic parameters of the same antenna as a transmitter or receiver are the same. This is the reciprocity theorem of antennas.
[0003] Chinese utility model patent CN114614263B discloses a low-profile broadband transmission array antenna with a double-layer metal surface, including a transmission array and a feed antenna; the transmission array is an array composed of a number of periodically distributed transmission units; the transmission unit includes an upper metal surface, a dielectric substrate, a lower metal surface and a metal column; the upper metal surface and the lower metal surface are printed on the upper and lower layers of the dielectric substrate; there is a gap between the upper metal surface and the lower metal surface, and the upper and lower gaps are orthogonally distributed; the metal column connects the upper and lower metal surfaces; the feed antenna emits spherical electromagnetic waves to the transmission array, and realizes 90° linear polarization rotation through the metal surface to radiate plane electromagnetic waves. The array surface of the low-profile broadband transmission array antenna with a double-layer metal surface of the present invention is composed of a layer of dielectric substrate, which has a relatively low profile, a wide operating frequency band, high reliability, can withstand a certain degree of high power, and can be applied to more complex working environments.
[0004] However, the working bandwidth of the broadband radiation unit of the existing broadband array antenna is relatively narrow. Utility Model Content
[0005] The utility model provides a wide-band array antenna to solve the problems in the background technology.
[0006] To achieve the above object, the utility model provides the following technical solution: a wideband array antenna, comprising a reflector, a feed column is arranged at the bottom of the reflector, a plurality of radiation plates are arranged in an array on the top of the reflector, a plurality of the radiation plates are uniformly provided with longitudinal radiation slots at the bottom, and a plurality of the radiation plates are uniformly provided with transverse radiation slots at the bottom. Ceramic parasitic plates are fixedly installed at the top of the reflector near the left and right sides.
[0007] Furthermore, the plurality of longitudinal radiation slots are respectively connected to the plurality of transverse radiation slots, and the plurality of longitudinal radiation slots are respectively cross-connected to the plurality of transverse radiation slots.
[0008] Furthermore, a longitudinal radiation groove and a transverse radiation groove are arranged on the top of each of the plurality of radiation plates.
[0009] Furthermore, the ceramic parasitic piece is a polygonal plate-shaped piece, and the ceramic parasitic piece is generally T-shaped.
[0010] Furthermore, hollow holes are provided on the tops of the plurality of reflective plates near the four corners.
[0011] Compared with the prior art, the utility model provides a wideband array antenna, which has the following beneficial effects:
[0012] 1. The broadband array antenna, by setting longitudinal radiation slots and transverse radiation slots, and modifying the radiation plate, adds longitudinal radiation slots and transverse radiation slots on the basis of the original structure, so that in addition to the radiation source generated between the outer edge of the radiation plate and the reflector, a new radiation source is generated between the radiation plate and the longitudinal radiation slot; at the same time, by increasing the external radiation window of the radiation plate, the quality factor of the microstrip radiation structure is reduced, thereby expanding the working frequency band, and the longitudinal radiation slots and transverse radiation slots are provided on the radiation plate, which can also extend the circuit distribution path, reduce the resonant frequency of the radiation structure, and achieve the purpose of miniaturization, and by arranging the transverse radiation slots and the longitudinal radiation slots in a cross shape, the current distribution can be constrained to form two current modes with similar resonant frequencies, thereby achieving the goal of broadband design; at the same time, the cross-shaped transverse radiation slots and the longitudinal radiation slots can constrain the current distribution, further improve the polarization purity of the radiation field, and increase the cross-polarization suppression ratio; thereby greatly widening the working frequency band width of the broadband radiation unit.
[0013] 2. The wideband array antenna reduces the leakage and reflection of electromagnetic waves by setting a ceramic parasitic plate. When the ceramic parasitic plate is set on the reflector, it can effectively suppress the stray signal from the ground. In addition, the stray radiation around the reflector is reduced. Therefore, the ceramic parasitic plate can effectively suppress the influence of the ground on the antenna, thereby enhancing the performance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure on the radiation sheet of the utility model;
[0015] Figure 2 It is an enlarged view of point A of the present utility model.
[0016] In the figure: 1. Radiating plate; 2. Reflecting plate; 3. Ceramic parasitic plate; 4. Feeding column; 5. Hollow hole; 6. Longitudinal radiation slot; 7. Transverse radiation slot. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-2 The utility model discloses a broadband array antenna, including a reflector 2, a feed column 4 is arranged at the bottom of the reflector 2, a plurality of radiation plates 1 are arranged in an array on the top of the reflector 2, a longitudinal radiation slot 6 is evenly arranged at the bottom of the plurality of radiation plates 1, and a transverse radiation slot 7 is evenly arranged at the bottom of the plurality of radiation plates 1. Ceramic parasitic plates 3 are fixedly installed at the top of the reflector 2 near the left and right sides.
[0019] Specifically, the plurality of longitudinal radiation slots 6 are respectively connected to the plurality of transverse radiation slots 7 , and the plurality of longitudinal radiation slots 6 are cross-connected to the plurality of transverse radiation slots 7 .
[0020] In this embodiment, the radiation plate 1 is modified and a longitudinal radiation slot 6 is added on the basis of the original structure, so that in addition to the radiation source generated between the outer edge of the radiation plate 1 and the reflector 2, a new radiation source is generated between the radiation plate 1 and the longitudinal radiation slot 6; at the same time, by increasing the external radiation window of the radiation plate, the quality factor of the microstrip radiation structure is reduced, thereby expanding the working frequency band, and the longitudinal radiation slot 6 and the transverse radiation slot 7 are opened on the radiation plate 1, which can also extend the circuit distribution path, reduce the resonant frequency of the radiation structure, and achieve the purpose of miniaturization. By arranging the transverse radiation slot 7 and the longitudinal radiation slot 6 in a cross shape, the current distribution can be constrained to form two current modes with similar resonant frequencies, thereby achieving the goal of broadband design; at the same time, the cross-shaped transverse radiation slot 7 and the longitudinal radiation slot 6 can constrain the current distribution, further improve the polarization purity of the radiation field, and increase the cross-polarization suppression ratio.
[0021] Specifically, a longitudinal radiation slot 6 and a transverse radiation slot 7 are provided on the top of each of the plurality of radiation sheets 1 .
[0022] Specifically, the ceramic parasitic piece 3 is a polygonal plate-shaped piece, and the ceramic parasitic piece 3 is T-shaped as a whole.
[0023] In this embodiment, the ceramic parasitic plate 3 has excellent anti-interference performance because it can effectively suppress the reflection and scattering of electromagnetic waves, thereby reducing the influence of external noise on the antenna.
[0024] Specifically, hollow holes 5 are formed on the tops of the plurality of reflective plates 2 near the four corners.
[0025] When in use, the longitudinal radiation slots 6 and the transverse radiation slots 7 generate a radiation source between the outer edge of the radiation plate 1 and the reflector 2, and a new radiation source is generated between the radiation plate 1 and the longitudinal radiation slots 6; at the same time, by increasing the external radiation window of the radiation plate, the quality factor of the microstrip radiation structure is reduced, thereby expanding the working frequency band, and the longitudinal radiation slots 6 and the transverse radiation slots 7 are opened on the radiation plate 1, which can also extend the circuit distribution path, reduce the resonant frequency of the radiation structure, and achieve the purpose of miniaturization. By arranging the transverse radiation slots 7 and the longitudinal radiation slots 6 in a cross shape, the current distribution can be constrained to form two The current modes with similar resonant frequencies achieve the goal of broadband design; at the same time, the cross-shaped transverse radiation slots 7 and longitudinal radiation slots 6 can constrain the current distribution, further improve the polarization purity of the radiation field, and increase the cross-polarization suppression ratio; by setting the ceramic parasitic plate 3, the leakage and reflection of electromagnetic waves are reduced. When the ceramic parasitic plate 3 is set on the reflecting plate 2, the stray signal from the ground can be effectively suppressed. In addition, the stray radiation around the reflecting plate 2 is reduced. Therefore, the ceramic parasitic plate 3 can effectively suppress the influence of the ground on the antenna, thereby enhancing the performance of the antenna.
[0026] In summary, the broadband array antenna, by setting the longitudinal radiation slot 6 and the transverse radiation slot 7, modifies the radiation plate 1, adds the longitudinal radiation slot 6 and the transverse radiation slot 7 on the basis of the original structure, so that in addition to the radiation source generated between the outer edge of the radiation plate 1 and the reflector 2, a new radiation source is generated between the radiation plate 1 and the longitudinal radiation slot 6; at the same time, by increasing the external radiation window of the radiation plate, the quality factor of the microstrip radiation structure is reduced, thereby expanding the working frequency band, and by opening the longitudinal radiation slot 6 and the transverse radiation slot 7 on the radiation plate 1, the circuit distribution path can be extended, the resonant frequency of the radiation structure can be reduced, and the purpose of miniaturization can be achieved. The cross-shaped arrangement of the transverse radiation slots 7 and the longitudinal radiation slots 6 can constrain the current distribution, forming two current modes with similar resonant frequencies, thereby achieving the goal of broadband design; at the same time, the cross-shaped arrangement of the transverse radiation slots 7 and the longitudinal radiation slots 6 can constrain the current distribution, further improving the polarization purity of the radiation field and increasing the cross-polarization suppression ratio; by arranging the ceramic parasitic plate 3, the leakage and reflection of electromagnetic waves are reduced. When the ceramic parasitic plate 3 is arranged on the reflecting plate 2, the stray signals from the ground can be effectively suppressed. In addition, the stray radiation around the reflecting plate 2 is reduced. Therefore, the ceramic parasitic plate 3 can effectively suppress the influence of the ground on the antenna, thereby enhancing the performance of the antenna.
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A broadband array antenna, comprising a reflector (2), characterized in that: A feeding column (4) is arranged at the bottom of the reflecting plate (2); a plurality of radiating plates (1) are distributed in an array on the top of the reflecting plate (2); longitudinal radiating slots (6) are evenly arranged at the bottom of the plurality of radiating plates (1); and transverse radiating slots (7) are evenly arranged at the bottom of the plurality of radiating plates (1); and ceramic parasitic plates (3) are fixedly installed at positions near the left and right sides of the top of the reflecting plate (2).
2. A wideband array antenna according to claim 1, characterized in that: The plurality of longitudinal radiation slots (6) are respectively connected to the plurality of transverse radiation slots (7), and the plurality of longitudinal radiation slots (6) are respectively cross-connected to the plurality of transverse radiation slots (7).
3. The wideband array antenna according to claim 1, characterized in that: A longitudinal radiation groove (6) and a transverse radiation groove (7) are arranged on the top of each of the plurality of radiation sheets (1).
4. The wideband array antenna according to claim 1, characterized in that: The ceramic parasitic piece (3) is a polygonal plate-shaped piece, and the ceramic parasitic piece (3) is generally T-shaped.
5. The wideband array antenna according to claim 1, characterized in that: The tops of the plurality of reflective plates (2) are each provided with hollow holes (5) near the four corners.