CN115693126B - Single-ridge horn and log periodic antenna-based miniaturized broadband polarized antenna - Google Patents
Single-ridge horn and log periodic antenna-based miniaturized broadband polarized antennaInfo
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Abstract
本发明涉及微波天线技术领域，具体的说是一种加工方便，稳定可靠、体积小的基于单脊喇叭和对数周期天线的小型化宽带极化天线，其特征在于，包括垂直极化和水平极化的双极化分集方式，两个极化端口在辐射远区的电磁场正交，其中极化端口一采用介质局部埋藏的小型化的印刷对数周期天线，极化端口二采用单脊超宽带喇叭天线；本发明与现有技术相比，方案设计简单、加工和组装方便，成本较低，有利于工程应用，适合应用于双极化雷达系统、电子对抗系统和无线通信系统中，具有较为重要的应用价值。This invention relates to the field of microwave antenna technology, specifically to a miniaturized broadband polarized antenna based on a single-ridge horn and a log-periodic antenna that is easy to manufacture, stable, reliable, and small in size. Its key feature is a dual-polarization diversity scheme including vertical and horizontal polarization, with the electromagnetic fields of the two polarization ports being orthogonal in the far-field radiation region. Polarization port one employs a miniaturized printed log-periodic antenna with local dielectric embedding, while polarization port two employs a single-ridge ultra-wideband horn antenna. Compared with existing technologies, this invention features a simpler design, easier manufacturing and assembly, lower cost, and is beneficial for engineering applications. It is suitable for use in dual-polarization radar systems, electronic countermeasures systems, and wireless communication systems, and has significant application value.
Description
Technical field:
The invention relates to the technical field of microwave antennas, in particular to a miniaturized broadband polarized antenna which is convenient to process, stable, reliable and small in size and is based on a single-ridge horn and a log-periodic antenna.
The background technology is as follows:
With the rapid development of technologies such as new system radar, electronic countermeasure, telemetry and the like, the number of antenna forms installed on an aircraft carrier is increased, and the index requirements of the system on the aircraft antenna are increased. In order to more fully utilize the information resources of electromagnetic waves, currently, fully polarized electronic information systems are receiving a great deal of attention and application. Accordingly, polarization diversity antennas have also been extensively studied and utilized, and various types of dual polarized antenna forms have emerged. A dual polarized antenna is a commonly used polarization sensitive antenna form, and the dual polarized antenna generally comprises two polarized ports, and the two polarized ports radiate and receive electromagnetic component signals with orthogonal polarization, so that the function of polarization diversity can be realized. The implementation schemes of the dual-polarized antenna are numerous, and corresponding antenna types can be selected according to specific application occasions, such as dual-polarized microstrip patch antennas, dual-polarized element antennas, dual-polarized slot antennas, dual-polarized reflecting surface antennas, dual-polarized dielectric resonator antennas, dual-polarized horn antennas and the like. The dual-polarized microstrip patch antenna has simple design and low cost, and is suitable for array application. Dual polarized slot antennas are a type of antennas that rely on electromagnetic energy from slot excitation to radiate into free space, which are of great interest because of their ease of implementation of broadband characteristics, and are characterized by the need to load a metal reflective floor to obtain a unidirectional radiation pattern. The dual-polarized element antenna has the advantages of simple structure, flexible design, low cost, easy widening of impedance bandwidth, stable directional diagram and suitability for base station communication systems. The dual-polarized horn antenna has the advantages of simple structure, convenient processing, stability and reliability, and is suitable for application in various occasions.
In practical engineering applications, miniaturization of dual polarized antennas is an important task. The size of dual polarized antennas is generally larger than conventional single polarized antennas, and therefore, it is important to compress the size of dual polarized antennas. The antenna miniaturization method includes improving dielectric parameters and magnetic permeability of a medium space, adopting a fractal structure, loading technology and the like.
The invention comprises the following steps:
Aiming at the defects and shortcomings in the prior art, the invention provides a miniaturized broadband polarized antenna based on a single-ridge horn and a log periodic antenna, which is suitable for an aircraft carrier platform.
The invention is achieved by the following measures:
A miniaturized broadband polarized antenna based on a single-ridge horn and a log periodic antenna is characterized by comprising a dual polarization diversity mode of vertical polarization and horizontal polarization, electromagnetic fields of two polarized ports are orthogonal in a radiation remote area, wherein the polarized port I adopts a miniaturized printed log periodic antenna with a medium partially buried, the polarized port II adopts a single-ridge ultra-wideband horn antenna, printed vibrators in the printed log periodic antenna are printed on a microwave medium substrate according to a periodic rule, the longest vibrator corresponding to a low frequency is set, namely, the length of a first printed vibrator is 2L 1, the width of the vibrator is W 1, the distance between the first vibrator and a second vibrator is d 1, and the structure of the printed log periodic antenna meets the following formula:
Ln+1/Ln＝τ1(1),Wn+1/Wn＝τ2(2),dn+1/dn＝τ2(3), In the formula, tau 1、τ1 and tau 1 are periodic laws, three parameters are respectively regulated and controlled, and the electrical performance of the printed log periodic antenna is jointly optimized, in order to reduce the reflection of electromagnetic waves and improve the impedance matching performance at low frequency, a carrier wave absorbing resistor is added at the tail end of a converging line fed by the antenna, so that the voltage standing wave ratio of the printed log periodic antenna is effectively reduced, in order to improve the radiation efficiency and the impedance matching performance of the antenna, the dielectric substrates with high dielectric constants are loaded at the two sides of a dielectric substrate of the printed log periodic antenna corresponding to the positions of low frequency vibrators, the situation at the positions of high frequency is kept unchanged, the aim of regulating the radiation performance of the printed log periodic antenna is fulfilled, the concept of introducing an equivalent dielectric constant epsilon e is considered, and the concept is determined by the following formula that epsilon e＝1+q(εr -1) (4), wherein q is a filling factor, q=0 when all filled in the medium, q=1 when 0< q <1 between the two is filled in the medium, epsilon r is the relative dielectric constant of a dielectric plate, and the equivalent dielectric constant of the antenna which is fully buried in the medium is approximately equal to the dielectric constant of the buried wavelength g is calculated by the formula: wherein c is the speed of light in vacuum, and f 0 is the center frequency of the antenna;
The second polarized port adopts a single-ridge ultra-wideband horn antenna to be provided with a single-ridge ultra-wideband open horn antenna radiator, and comprises an exponential curve-shaped metal ridge, a metal reflection floor playing a mirror image role, a metal resonant cavity for feeding and a coaxial line port and a probe for feeding, wherein in a ridge horn section, a ridge curve adopts an exponential curve form:
Wherein 0< z < h_horn, h_horn is the height of the micro-horn, and z is the central axis coordinate of the horn.
The antenna with the polarized port I is etched with a non-conductive through hole array on the loaded dielectric substrate to play a role in adjusting impedance and radiation characteristics, and the printed log-periodic antenna designed by the invention can realize the compression of the transverse line size of the antenna through local dielectric embedding and integrated line resistance loading.
The width a and the length h_cavity of the feed resonant cavity of the horn antenna with the polarized port II are the same, and in order to improve the impedance matching effect of the horn antenna and reduce standing waves, the resonant cavity of the antenna adopts a gradual change type cavity.
In summary, the present invention provides a design scheme and an antenna structure device of a miniaturized polarization diversity antenna based on a single-ridge horn and a log-periodic antenna, and the antenna device adopts a combined miniaturized broadband antenna structure to realize horizontal and vertical polarization diversity operation modes. The two polarization ports of the antenna are respectively a single-ridge horn open type horn antenna radiator and a local buried type printed log-periodic antenna radiator, and good polarization isolation and cross polarization performance are realized by reasonably configuring the positions between the single-ridge horn open type horn antenna radiator and the local buried type printed log-periodic antenna radiator. The antenna size is compressed by adopting the single-ridge horn antenna based on the mirror image principle of an electromagnetic field, and the impedance and the pattern performance of the single-ridge horn antenna are adjusted by optimally designing the structure and the shape of the reflector floor of the single-ridge horn antenna. The polarization diversity antenna scheme designed in the invention has the advantages of simple design, convenient processing and assembly, lower cost and contribution to engineering application. The miniaturized polarization diversity antenna device based on the single-ridge horn and the log-periodic antenna is suitable for being applied to a dual-polarized radar system, an electronic countermeasure system and a wireless communication system, and has important application value.
Description of the drawings:
Fig. 1 is a schematic view of the structure of the present invention, fig. 1 (a) is a perspective view, fig. 1 (b) is a front view, fig. 1 (c) is a rear view, fig. 1 (d) is a left view, fig. 1 (e) is a right view, fig. 1 (f) is a top view, and fig. 1 (g) is a bottom view.
Fig. 2 is a structural view of a single-ridge horn antenna radiator (polarized port 2) in the present invention, in which fig. 2 (a) is a perspective view, fig. 2 (b) is a front view, fig. 2 (c) is a rear view, fig. 2 (d) is a left view, fig. 2 (e) is a right view, fig. 2 (f) is a top view, and fig. 2 (g) is a bottom view.
Fig. 3 is a view showing a structure of a buried printed log periodic antenna radiator (polarized port 1) according to the present invention, in which fig. 3 (a) is a perspective view, fig. 3 (b) is a front view, fig. 3 (c) is a rear view, fig. 3 (d) is a left view, fig. 3 (e) is a right view, fig. 3 (f) is a top view, and fig. 3 (g) is a bottom view.
Fig. 4 is a schematic structural view of a printed log periodic antenna radiator according to the present invention, in which fig. 4 (a) is a perspective view, fig. 4 (b) is a front view, fig. 4 (c) is a rear view, fig. 4 (d) is a left view, fig. 4 (e) is a right view, fig. 4 (f) is a top view, and fig. 4 (g) is a bottom view.
Fig. 5 shows the simulation results of the circuit characteristics of the antenna port according to the present invention, wherein fig. 5 (a) shows the VSWR of the port 1, fig. 5 (b) shows the VSWR of the port 2, and fig. 5 (c) shows the isolation between the ports.
Fig. 6 shows the radiation characteristic simulation results of the port 1 at a frequency of 1.7GHz in the example, in which fig. 6 (a) is a three-dimensional gain pattern, fig. 6 (b) is a three-dimensional axial ratio pattern, fig. 6 (c) is a gain pattern at the xoz plane, and fig. 6 (d) is a gain pattern at the yoz plane.
Fig. 7 shows the radiation characteristic simulation results of the port 2 at a frequency of 1.7GHz in the embodiment of the present invention, in which fig. 7 (a) is a three-dimensional gain pattern, fig. 7 (b) is a three-dimensional axial ratio pattern, fig. 7 (c) is a gain pattern at the xoz plane, and fig. 7 (d) is a gain pattern at the yoz plane.
Fig. 8 is a simulation result of radiation characteristics of the port 1 at a frequency of 2.3GHz in the embodiment of the present invention, in which fig. 8 (a) is a three-dimensional gain pattern, fig. 8 (b) is a three-dimensional axial ratio pattern, fig. 8 (c) is a gain pattern at the xoz plane, and fig. 8 (d) is a gain pattern at the yoz plane.
Fig. 9 is a simulation result of the radiation characteristic of the port 2 at the frequency of 2.3GHz in the embodiment of the present invention, in which fig. 9 (a) is a three-dimensional gain pattern, fig. 9 (b) is a three-dimensional axial ratio pattern, fig. 9 (c) is a gain pattern at the xoz plane, and fig. 9 (d) is a gain pattern at the yoz plane.
Fig. 10 shows the radiation characteristic simulation results of the port 1 at a frequency of 3GHz in the embodiment of the present invention, in which fig. 10 (a) is a three-dimensional gain pattern, fig. 10 (b) is a three-dimensional axial ratio pattern, fig. 10 (c) is a gain pattern at the xoz plane, and fig. 10 (d) is a gain pattern at the yoz plane.
Fig. 11 shows the radiation characteristic simulation results of the port 2 at a frequency of 3GHz in the embodiment of the present invention, in which fig. 11 (a) is a three-dimensional gain pattern, fig. 11 (b) is a three-dimensional axial ratio pattern, fig. 11 (c) is a gain pattern at the xoz plane, and fig. 11 (d) is a gain pattern at the yoz plane.
Fig. 12 shows the radiation characteristic simulation results of the port 1 at a frequency of 4GHz, in which fig. 12 (a) is a three-dimensional gain pattern, fig. 12 (b) is a three-dimensional axial ratio pattern, fig. 12 (c) is a gain pattern on the xoz plane, and fig. 12 (d) is a gain pattern on the yoz plane.
Fig. 13 is a simulation result of the radiation characteristic of the port 2 at the frequency of 4GHz in the embodiment of the present invention, in which fig. 13 (a) is a three-dimensional gain pattern, fig. 13 (b) is a three-dimensional axial ratio pattern, fig. 13 (c) is a gain pattern at the xoz plane, and fig. 13 (d) is a gain pattern at the yoz plane.
Fig. 14 shows the radiation characteristic simulation results of the port 1 at a frequency of 5GHz in the embodiment of the present invention, in which fig. 14 (a) is a three-dimensional gain pattern, fig. 14 (b) is a three-dimensional axial ratio pattern, fig. 14 (c) is a gain pattern at the xoz plane, and fig. 14 (d) is a gain pattern at the yoz plane.
Fig. 15 shows the radiation characteristic simulation results of the port 2 at a frequency of 5GHz in the embodiment of the present invention, in which fig. 15 (a) is a three-dimensional gain pattern, fig. 15 (b) is a three-dimensional axial ratio pattern, fig. 15 (c) is a gain pattern at the xoz plane, and fig. 15 (d) is a gain pattern at the yoz plane.
Reference numeral 1 is a single-ridge horn feed cavity, 2 is a printed log periodic antenna radiator, 3 is a grounding plate of the single-ridge horn antenna radiator, 4 is a buried dielectric substrate of the printed log periodic antenna radiator, 5 is a ridge of the single-ridge horn antenna radiator, 6 is a coaxial feed port of the single-ridge horn antenna radiator, 7 is a non-conductive through hole on the buried dielectric substrate of the printed log periodic antenna radiator, 8 is a printed vibrator of the printed log periodic antenna radiator, and 9 is a dielectric substrate of the printed log periodic antenna radiator.
The specific embodiment is as follows:
the invention will be further described with reference to the drawings and examples.
The invention provides a design scheme and a device of a miniaturized polarized diversity antenna based on a single-ridge horn and a log periodic antenna based on an aircraft carrier platform, wherein a polarized diversity mode of dual polarization of vertical polarization and horizontal polarization is adopted, electromagnetic fields of two polarized ports in a far radiation zone are approximately orthogonal, and orthogonal polarization components of the electromagnetic waves are radiated and perceived; in consideration of the fact that the antenna installation space of an actual aircraft carrier platform is limited, miniaturization of an antenna has become an important technical requirement, in the design thought of the polarized diversity antenna provided by the invention, a combined miniaturized orthogonal polarized antenna diversity method is adopted by a dual polarized antenna, namely, one polarized port adopts a miniaturized printed log periodic antenna with locally buried medium and is defined as a polarized port 1, the other polarized port adopts a single-ridge ultra-wideband horn antenna and is defined as a polarized port 2, miniaturization of the ultra-wideband horn antenna is realized based on the mirror image principle, antenna radiators of the two polarized ports are tightly assembled together, and the approximate orthogonal relation of radiation fields of the two polarized radiators is realized through reasonable antenna configuration spatial position relation.
The two polarized radiation ports of the invention adopt different types and structures, and can be designed relatively independently, so that the design difficulty is reduced. The whole polarization diversity antenna has simple structure, is easy to process and assemble, and is suitable for practical engineering application. The invention designs a miniaturized polarized diversity antenna structure model based on a single-ridge horn and a log periodic antenna, which is shown in figure 1. In fig. 1,1 is a single-ridge horn feed cavity, 2 is a printed log-periodic antenna radiator, 3 is a ground plate of the single-ridge horn antenna radiator, 4 is a buried dielectric substrate of the printed log-periodic antenna radiator, 5 is a ridge of the single-ridge horn antenna radiator, and 6 is a coaxial feed port of the single-ridge horn antenna radiator. Fig. 2 is a diagram of a single-ridge horn antenna radiator (polarized port 2), and fig. 3 is a diagram of a printed element antenna radiator (polarized port 1). In fig. 2, 7 is a non-conductive via on a buried dielectric substrate of a printed log periodic antenna radiator, 8 is a printed element of the printed log periodic antenna radiator, and 9 is a dielectric substrate of the printed log periodic antenna radiator. Fig. 3 is a diagram of the buried printed log periodic antenna radiator (polarized port 1).
The invention designs a transverse dimension compressed miniaturized printed log periodic antenna, and the structure of the antenna is shown in figure 3. The printed vibrator is printed on the microwave medium substrate according to a periodic rule, and the structure of the printed vibrator is shown in fig. 4. The length of the corresponding longest vibrator at the low frequency, namely the first printed vibrator is 2L 1, the width of the vibrator is W 1, the distance between the first vibrator and the second vibrator is d 1, and the designed structure of the printed log periodic antenna meets the formula as follows.
Ln+1/Ln＝τ1(1),Wn+1/Wn＝τ2(2),dn+1/dn＝τ2(3)
In the formula, tau 1、τ1 and tau 1 are periodic laws, and three parameters are respectively regulated and controlled to jointly optimize the electrical performance of the printed log periodic antenna.
In the miniaturized design of the printed log periodic antenna, on one hand, in order to reduce the reflection of electromagnetic waves and improve the impedance matching performance at low frequency, a carrier wave absorbing resistor is added at the tail end of a collecting line fed by the antenna, so that the voltage standing wave ratio of the printed log periodic antenna is effectively reduced, and on the other hand, in order to improve the radiation efficiency and the impedance matching performance of the antenna, the invention provides a miniaturized scheme of the antenna with a local buried dielectric, namely, the dielectric substrate with higher dielectric constant is loaded at the positions corresponding to a plurality of low-frequency vibrators at two sides of the dielectric substrate of the printed log periodic antenna, and the condition at the high-frequency position is kept unchanged, so that the aim of adjusting the radiation performance of the printed log periodic antenna is fulfilled. The dielectric embedding technology is an effective antenna miniaturization technology means. The antenna is buried in the insulating medium with higher dielectric constant by using the medium burying technology, the size of the antenna is reduced to a certain extent, and meanwhile, the concealment of the antenna is improved, the antenna is protected, and the antenna is suitable for platform application. In the buried dielectric antenna, in analyzing the impedance characteristic and the radiation characteristic of the antenna, considering the influence after introducing the dielectric, the concept of the equivalent dielectric constant epsilon e is generally introduced, and the expression is as follows:
εe＝1+q(εr-1) (4)
Where q is a filling factor, q=1 when filled in the medium, q=0 when filled in the air, and 0< q <1 between them, and ε r is the relative dielectric constant of the medium plate. Thus, for an antenna that is fully buried inside the medium, q=1. The equivalent dielectric constant and the relative dielectric constant are approximately equal. In contrast, the calculation formula of the electromagnetic wave wavelength lambda g in the medium-buried antenna is as follows: where c is the speed of light in vacuum and f 0 is the center frequency of the antenna.
The size of the antenna is wavelength-dependent, and when the relative dielectric constant is greater than 1, the size of the antenna can be reduced, so that the antenna is miniaturized. In the invention, the mode of burying the local medium is adopted, so that the equivalent dielectric constant is more complex, the thickness, the height and the relative dielectric constant of the loaded medium block need to be comprehensively considered according to the size of the antenna, and the expected parameter value is obtained by adopting full-wave electromagnetic simulation calculation. Meanwhile, due to the fact that local medium is loaded, the loaded medium substrate is cut off at a certain height, in order to reduce reflection of electromagnetic waves, a non-conductive through hole array is etched on the loaded medium substrate, the function of adjusting impedance and radiation characteristics is achieved, and the structure is shown in fig. 3 (d). The printed log periodic antenna designed by the invention can realize the compression of the transverse line size of the antenna through the local medium embedding and the integrated line resistance loading.
In the present invention, the polarized port 2 is a single-ridge ultra-wideband open horn antenna radiator. The single-ridge horn antenna designed by the invention is realized based on the mirror image principle of electromagnetic waves, and the size of the antenna can be effectively reduced theoretically. The horn antenna has the characteristics of simple structure, large power capacity, wide frequency band, easy control of a directional diagram and the like, and is widely applied to electromagnetic compatibility tests, radars and communication systems. The structure of the single-ridge ultra-wideband open horn antenna radiator designed by the invention is shown in figure 2, and the structure comprises an exponential curve-shaped metal ridge, a metal reflecting floor playing a mirror image role, a metal resonant cavity for feeding, a coaxial line port for feeding and a probe. When designing the ridge profile, the profile of the ridge is reasonably selected to achieve good transmission and radiation characteristics. In the ridge horn section, the ridge curve adopts an exponential curve form as follows:
Wherein 0< z < h_horn, h_horn is the height of the micro-horn, z is the central axis coordinate of the horn, and A 1、B1、C1 values are undetermined coefficients respectively and are determined according to the required horn antenna size.
The width a and the length h_cavity of the feed resonant cavity of the horn antenna. In order to improve the impedance matching effect of the horn antenna and reduce standing waves, a resonant cavity of the antenna adopts a gradual change type cavity. In the design of the metal reflecting floor, the invention adopts the structure shown in fig. 2 (d), and the adjustment parameters nn1, nn2, mm1 and mm2 realize the aim of adjusting the impedance of the directional diagram of the horn antenna. The single-ridge ultra-wideband horn antenna and the printed log periodic antenna are configured according to the structural mode shown in fig. 1, so that effective isolation and polarization diversity effects of two polarization ports are realized.
Examples:
the embodiment provides a miniaturized polarization diversity antenna device based on a single-ridge horn and a log-periodic antenna, the antenna is subjected to performance simulation and optimization design by adopting a full-wave electromagnetic simulation technology, and simulation experiment results prove the feasibility of the miniaturized polarization diversity antenna based on the single-ridge horn and the log-periodic antenna.
The circuit characteristics of the miniaturized polarized diversity antenna based on the single-ridge horn and the log-periodic antenna are shown in fig. 6, and when the working frequency points are 1.7GHz, 2.3GHz, 3GHz, 4GHz and 5GHz, the VSWR of the polarized port 1 of the antenna is about 4.39, 1.49, 1.06, 1.12 and 1.67 respectively, the VSWR of the polarized port 2 is about 2.94, 2.27, 1.94, 1.87 and 1.37 respectively, and the port isolation is about 40.97dB, 26.63dB, 36.64dB, 49.31dB and 39.30dB respectively.
Fig. 7 to 12 show radiation pattern simulation results of two polarized ports at the operating frequency points of 1.7GHz, 2.3GHz, 3GHz, 4GHz, and 5GHz, respectively, and a three-dimensional gain pattern, a three-dimensional axial ratio pattern, a gain pattern at the xoz plane, and a gain pattern at the yoz plane are respectively shown in each polarized port of each frequency point. For polarized port 1, the gains of the antenna are about 2.09dB, 5.27dB, 5.33dB, 5.91dB and 5.81dB respectively at the working frequency points of 1.7GHz, 2.3GHz, 3GHz, 4GHz and 5GHz, and the axial ratios in the main radiation directions are about more than 40dB, 38.66dB, 31.74dB, 34.59dB and 26.59dB respectively. For polarized port 2, the gains of the antenna are about 2.02dB, 2.16dB, 3.07dB, 4.69dB and 5.63dB at operating frequency points of 1.7GHz, 2.3GHz, 3GHz, 4GHz and 5GHz, respectively, and the axial ratios in the main radiation directions are about more than 40dB, 30.01dB, 28.42dB and more than 40dB, respectively.
In summary, the present invention provides a design scheme and an antenna structure device of a miniaturized polarization diversity antenna based on a single-ridge horn and a log-periodic antenna, and the antenna device adopts a combined miniaturized broadband antenna structure to realize horizontal and vertical polarization diversity operation modes. The two polarization ports of the antenna are respectively a single-ridge horn open type horn antenna radiator and a local buried type printed log-periodic antenna radiator, and good polarization isolation and cross polarization performance are realized by reasonably configuring the positions between the single-ridge horn open type horn antenna radiator and the local buried type printed log-periodic antenna radiator. The antenna size is compressed by adopting the single-ridge horn antenna based on the mirror image principle of an electromagnetic field, and the impedance and the pattern performance of the single-ridge horn antenna are adjusted by optimally designing the structure and the shape of the reflector floor of the single-ridge horn antenna. The polarization diversity antenna scheme designed in the invention has the advantages of simple design, convenient processing and assembly, lower cost and contribution to engineering application. The miniaturized polarization diversity antenna device based on the single-ridge horn and the log-periodic antenna is suitable for being applied to a dual-polarized radar system, an electronic countermeasure system and a wireless communication system, and has important application value.
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| CN103151602A (en) * | 2011-06-30 | 2013-06-12 | 盖普威夫斯公司 | Improved broadband multi-dipole antenna with frequency-independent radiation characteristics |
| CN103594819A (en) * | 2013-11-29 | 2014-02-19 | 东南大学 | Thin-substrate phase amplitude correction broadband planar horn antenna |
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| CN105576362A (en) * | 2015-12-25 | 2016-05-11 | 哈尔滨工业大学（威海） | Miniature broadband antenna device |
| CN110635230A (en) * | 2018-06-25 | 2019-12-31 | 哈尔滨工业大学（威海） | Asymmetric Dual-polarized Antenna Device Based on SICL Resonant Cavity Ring Slot and Printed Vibrator |
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| GB2600413B (en) * | 2020-10-27 | 2025-08-06 | Draexlmaier Lisa Gmbh | Horn antenna element |
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| CN103151602A (en) * | 2011-06-30 | 2013-06-12 | 盖普威夫斯公司 | Improved broadband multi-dipole antenna with frequency-independent radiation characteristics |
| CN103594819A (en) * | 2013-11-29 | 2014-02-19 | 东南大学 | Thin-substrate phase amplitude correction broadband planar horn antenna |
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