Concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna and working method
阅读说明：本技术 凹型共形的宽波束高增益双频介质谐振器天线及工作方法 (Concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna and working method ) 是由 潘锦 邹银 马伯远 杨德强 刘贤峰 王恩浩 于 2019-10-31 设计创作，主要内容包括：本发明提供一种凹型共形的宽波束高增益双频介质谐振器天线及工作方法,包括：从上到下依次设置的介质谐振器、地板、介质基板、馈电端口,地板中心设有馈缝,介质基板下表面设有馈线；地板与介质谐振器都为弧形且共形,弧形的中心位于其上方,介质谐振器固定于地板中间,地板为金属；介质基板上、下表面分别贴合覆盖地板和馈线；在地板中心蚀刻出馈缝；天线由馈线馈电,本发明通过采用弧形的凹型地板与凹型介质谐振器,实现了宽波束高增益双频性能。增大了天线的波束宽度；该天线基于介质谐振器天线设计,相比于传统的微带贴片天线与其他共形介质谐振器天线,拥有更宽的波束宽度以及更高的增益,相比于金属贴片天线,性能没有明显恶化。(The invention provides a concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna and a working method thereof, wherein the concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna comprises the following steps: the device comprises a dielectric resonator, a floor, a dielectric substrate and a feed port which are sequentially arranged from top to bottom, wherein a feed gap is formed in the center of the floor, and a feed line is arranged on the lower surface of the dielectric substrate; the floor and the dielectric resonator are both arc-shaped and conformal, the center of the arc is positioned above the floor, the dielectric resonator is fixed in the middle of the floor, and the floor is made of metal; the upper surface and the lower surface of the dielectric substrate are respectively attached to the covering floor and the feeder line; etching a feed gap in the center of the floor; the antenna is fed by a feeder line, and the wide-beam high-gain dual-frequency performance is realized by adopting the arc-shaped concave floor and the concave dielectric resonator. The beam width of the antenna is increased; the antenna is designed based on the dielectric resonator antenna, has wider beam width and higher gain compared with the traditional microstrip patch antenna and other conformal dielectric resonator antennas, and has no obvious performance deterioration compared with a metal patch antenna.)
1. A concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna, comprising: the floor comprises a dielectric resonator (1), a floor (2), a dielectric substrate (3) and a feed port (4) which are arranged from top to bottom in sequence, wherein a feed gap (5) is formed in the center of the floor, and a feed line (6) is arranged on the lower surface of the dielectric substrate (3);
the floor (2) and the dielectric resonator (1) are both arc-shaped and conformal, the center of the arc is positioned above the floor, the dielectric resonator (1) is fixed in the middle of the floor (2), and the floor (2) is made of metal;
the upper surface and the lower surface of the dielectric substrate (3) are respectively attached to the covering floor (2) and the feeder line (6); etching a feed gap (5) in the center of the floor (2);
the antenna is fed by a feeder (6), and then electromagnetic wave energy is coupled and conducted to the dielectric resonator (1) on the upper surface through a feed slit (5) on the floor (2).
2. The concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna according to claim 1, wherein: the floor (2) is made of copper foil.
3. The concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna according to claim 1, wherein: the dielectric resonator (1) is made of an alumina ceramic material, the relative dielectric constant is 12.3, the width of the dielectric resonator (1) is 30mm, the thickness of the dielectric resonator is 11mm, the arc length of the bottom arc edge is 59.7mm, the arc length of the top arc edge is 48.2mm, and the radian is 60 degrees;
the width of the floor (2) is 60mm, the arc length of the arc edge is 89.5mm, and the radian is 90 degrees;
the dielectric substrate (3) is made of polytetrafluoroethylene materials, the relative dielectric constant is 2.1, the width of the dielectric substrate (3) is 60mm, the height of the dielectric substrate is 0.6mm, the arc length of the arc edge is 89.5mm, and the radian of the arc edge is 90 degrees.
4. The concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna according to claim 1, wherein: the length of the feed gap (5) is 13mm, the width is 2.5mm, the feeder (6) is a copper microstrip line, the length is 50mm, the width is 3mm, the distance between the feeder (6) and the center of the feed gap (5) is 1.5mm, and the conformal structure enables the antenna to be matched with the feed structure.
5. The concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna according to claim 1, wherein: the antenna employs side feed.
6. The method of any one of claims 1 to 5, wherein the concave conformal wide-beam high-gain dual-band dielectric resonator antenna comprises: the performance of realizing double frequency is achieved by utilizing two resonance modes of the antenna.
7. The method of claim 6, wherein the method comprises: in a first resonance mode, when the resonance frequency is 3.66GHz, the radiation mechanism of the concave conformal dielectric resonator antenna is similar to two magnetic monopole radiation, and the 3dB beam width under the yoz plane is 188 degrees, so that the wide beam performance can be realized; when the second resonance mode is the resonance frequency of 4.44GHz, the radiation mechanism of the concave conformal dielectric resonator antenna is similar to three magnetic dipoles, and the maximum gain at xoz and the yoz plane is 9.06dB, so that high gain performance can be realized;
on the premise of knowing the resonant frequency of the antenna, the parameters of a feed structure are obtained according to the traditional gap coupling feed theory, a feed gap (5) at the position of a feed point is the position with the maximum magnetic field intensity, energy is coupled into the antenna through the feed gap (5), and when the antenna radiates, the radiation energy is converged due to a concave structure, so that the performances of wide wave beam and high gain are further realized.
Technical Field
The invention relates to the technical field of conformal wearable antennas, in particular to a concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna and a working method thereof.
Background
The demand for portability of wireless communication devices is increasing due to the rapid development of wireless communication technology, and various wearable electronic devices are now in use, which makes the conformal antenna an essential research hotspot and development trend.
The conformal antenna is an antenna or an antenna array which can keep consistent with the appearance of the platform, and is widely applied to the fields of unmanned aerial vehicles, ships, ground vehicles, satellite communication, military airborne surveillance radars and the like. Currently, an important development direction of the conformal antenna is a flexible conformal microstrip antenna, which can be bent to any angle, attached to any surface, and can self-repair or adjust the electromagnetic wave of the array element. However, the conventional dielectric resonator antenna is applied to a plane and a flat floor, and is not actually applied to a low-profile conformal device, and compared with a microstrip antenna, the dielectric resonator antenna has many advantages of high polarization purity, high design freedom, multiple radiation modes and the like, and can further meet the requirements of a conformal system on the antenna.
The multi-frequency directional pattern switchable antenna is widely applied to a multiplexing wireless system, has higher application freedom compared with a common single-frequency directional pattern antenna, and can achieve the functions of increasing channel capacity, suppressing interference, switching communication targets and the like according to system requirements. The common directional diagram reconstruction mainly comprises the conversion between the wide beam and the high directional radiation performance, the two meet the requirements of broadcast communication and point-to-point communication respectively, and the method is suitable for all levels of father nodes of mobile ad hoc communication networks such as cross-country fleets, unmanned clusters and the like. This function has not been found in conformal dielectric resonator antennas.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a concave conformal wide-beam high-gain dual-band dielectric resonator antenna and a working method thereof, which can effectively solve the above problems of the prior art and achieve good performance advantages.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna, comprising: the floor comprises a
the
the upper surface and the lower surface of the
the antenna is fed by a feed line 6 and the electromagnetic wave energy is then coupled through a
Preferably, the
preferably, the
the width of the
the
Preferably, the length of the
Preferably, the antenna is fed laterally.
In order to achieve the above purpose, the present invention further provides a working method of the concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna, which achieves dual-frequency performance by using two resonance modes of the antenna.
Preferably, the operating method further includes: in a first resonance mode, when the resonance frequency is 3.66GHz, the radiation mechanism of the concave conformal dielectric resonator antenna is similar to two magnetic monopole radiation, and the 3dB beam width under the yoz plane is 188 degrees, so that the wide beam performance can be realized; when the second resonance mode is the resonance frequency of 4.44GHz, the radiation mechanism of the concave conformal dielectric resonator antenna is similar to three magnetic dipoles, and the maximum gain at xoz and the yoz plane is 9.06dB, so that high gain performance can be realized;
on the premise of knowing the resonant frequency of the antenna, the parameters of the feed structure are obtained according to the traditional gap coupling feed theory, the
Compared with the prior art, the invention has the advantages that:
1. by adopting the arc-shaped concave floor and the concave dielectric resonator, the wide-beam high-gain dual-frequency performance is realized. The conformal device makes the antenna wearable;
2. the aluminum oxide ceramic material with high dielectric constant is used as a dielectric resonator, and radiation characteristics of different resonance modes are flexibly adopted based on the extremely high design freedom degree of the dielectric resonator, so that the conformal dielectric resonator antenna has higher gain and wider beam performance, and can achieve the effect of realizing double frequency;
3. by analyzing the radiation mechanisms of the concave conformal dielectric resonator under the corresponding resonant frequencies of the two resonant modes respectively, the wide beam and high gain performance of the concave conformal dielectric resonator are clearly explained;
4. the whole antenna is of a low-profile conformal structure, lateral feeding is adopted, the floor is slotted, the feeding effect is achieved through a slot coupling feeding theory, the floor is conformal with the concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna, the antenna can be applied to a curved surface, and the antenna is suitable for wearable equipment; the overall structure is simple, mature theoretical solution and design methods are provided, and the design and application difficulty is greatly reduced. By changing the planar antenna into a concave type, the wave beams of the antenna are converged, and higher gain can be obtained in the same working mode; compared with the traditional microstrip patch antenna and other conformal dielectric resonator antennas, the antenna has wider beam width and higher gain, is easy to understand and has strong portability based on the design of the dielectric resonator antenna.
Drawings
Fig. 1 is a broad beam radiation mechanical diagram of a concave conformal broad beam high gain dual frequency dielectric resonator antenna of the present invention;
fig. 2 is a high gain radiation mechanical diagram of the concave conformal wide beam high gain dual frequency dielectric resonator antenna of the present invention;
fig. 3 is a front view of a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
fig. 4 is a top view of a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
fig. 5 is a bottom view of a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
FIG. 6 is a graph of the S parameter of a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
fig. 7 is a two-dimensional gain pattern at 3.66GHz for a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
fig. 8 is a two-dimensional gain pattern at 4.44GHz for a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention;
the antenna comprises a
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the description of the present invention. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
A concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna, comprising: the floor comprises a
the
the upper surface and the lower surface of the
the antenna is fed by a feed line 6 and the electromagnetic wave energy is then coupled through a
Further, the
further, the
the width of the
the
Further, the length of the
Further, the antenna adopts side feeding. This is done to reduce the amount of space occupied by the antenna in the vertical direction.
The antenna is designed based on the dielectric resonator antenna, has wider wave beams and higher gain compared with the traditional microstrip antenna and other conformal dielectric resonator antennas, and can be applied to conformal wearable equipment due to the ingenious design of the arc-shaped structure.
Fig. 6 is a graph of the S-parameter of a concave conformal wide-beam high-gain dual-band dielectric resonator antenna of the present invention. It can be seen that the antenna achieves good dual-frequency performance at 3.66GHz and 4.44GHz, and the return loss is less than-15 dB, so that the antenna achieves good matching characteristics in the working frequency band.
Fig. 7 is a two-dimensional gain pattern at a frequency of 3.66GHz for a concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna of the present invention. It can be seen that the 3dB beamwidth of the concave conformal dielectric resonator antenna in the yoz plane is 188 degrees, which achieves good wide beam performance.
Fig. 8 is a two-dimensional gain pattern at a frequency of 4.44GHz for a concave conformal wide-beam high-gain dual-frequency dielectric resonator antenna of the present invention. It can be seen that the maximum gain of the concave conformal dielectric resonator antenna in xoz and the yoz plane is 9.06dB, which achieves good high gain performance.
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