CN106803614B - Method and device for determining feed port of high-temperature-resistant multi-mode satellite navigation antenna - Google Patents
Method and device for determining feed port of high-temperature-resistant multi-mode satellite navigation antenna Download PDFInfo
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- CN106803614B CN106803614B CN201611052702.XA CN201611052702A CN106803614B CN 106803614 B CN106803614 B CN 106803614B CN 201611052702 A CN201611052702 A CN 201611052702A CN 106803614 B CN106803614 B CN 106803614B
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Abstract
The embodiment of the invention provides a method and a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna, wherein the method comprises the following steps: establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, wherein the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna; searching along the coordinate axis according to a preset rule, acquiring the abscissa and the ordinate of the GPS antenna feed port meeting preset conditions, and determining the position of the feed port according to the abscissa and the ordinate of the feed port. The device is used for executing the method. According to the embodiment of the invention, the position of the feed port of the GPS antenna is reasonably determined, the eccentric feed point of the GPS antenna is obtained, the GPS antenna is subjected to eccentric feed and metallized via hole, and the problem of polarization mismatch of the multimode satellite navigation antenna after the antenna housing is added can be effectively solved.
Description
Technical Field
The embodiment of the invention relates to the technical field of radio application, in particular to a method and a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna.
Background
With the development of science and technology, the satellite navigation technology is continuously advanced, and a satellite navigation system can realize positioning, navigation, supervision and management of targets, plays an important role in different fields such as military, civil and the like, and is called as an indispensable radio application technology.
The antenna is one of the important components in a radio system, the electrical performance of the antenna determines the performance of the whole link system, and the multimode satellite navigation antenna refers to a broadband multimode satellite navigation antenna capable of receiving multiple navigation signals simultaneously. The multimode satellite navigation antenna works on a GPS antenna (1575 +/-2.046 MHz) and a Beidou antenna (1268 +/-8.25 MHz). Designing a multimode satellite navigation antenna covering a Beidou frequency band faces urgent challenges, and not only needs to consider the realization of the performance of the antenna, but also needs to consider the loading effect of different media in the aspect of structure. In addition, as the speed of the aircraft is continuously increased, the environment with deteriorated surface places higher demands on the navigation antenna. Due to the extremely high flying speed of the aircraft, the instantaneous heating rate of the antenna can be as high as 120 ℃/s. Therefore, the antenna is required to have an extremely strong thermal shock resistance. In the process of temperature rise, the structure of the antenna is kept stable, and the performance of the electric appliance can adapt to the change of temperature so as to ensure that the antenna can normally work in the flying process.
In the prior art, an antenna housing is usually arranged outside a multimode satellite navigation antenna, and the antenna housing is an important component of a bullet structure of a cruise guidance weapon, is a barrier for protecting an antenna system from being influenced by a severe environment caused by high-speed flight and normally works, and is a component integrating multiple functions of wave transmission, heat resistance, bearing, corrosion resistance and the like. When the antenna is protected to normally work, the antenna housing is loaded as a medium, so that the performance of the antenna is greatly influenced, and even the normal work of the antenna is seriously influenced. The Beidou antenna and the GPS antenna in the multimode satellite navigation antenna are right-hand circularly polarized antennas, but after the antenna housing is arranged, polarization is seriously degraded, cross polarization is obvious, and the antenna housing is degraded into linear polarization so as not to meet performance requirements and not to work normally.
Therefore, how to provide a method can effectively avoid the influence of the radome on the performance of the multimode satellite navigation antenna on the premise of not changing the physical structure and the material of the radome, and becomes a problem to be solved urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention provides a method and a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna.
In one aspect, an embodiment of the present invention provides a method for determining a feed port of a high temperature resistant multimode satellite navigation antenna, including:
establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, wherein the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna;
searching along the coordinate axis according to a preset rule, acquiring the abscissa and the ordinate of the GPS antenna feed port meeting preset conditions, and determining the position of the feed port according to the abscissa and the ordinate of the feed port.
On the other hand, the embodiment of the invention provides a method and a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna, wherein the method and the device comprise the following steps:
the coordinate system establishing unit is used for establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, and the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna;
and the feeding port position acquisition unit is used for respectively searching and acquiring the abscissa and the ordinate of the GPS antenna feeding port meeting preset conditions along the coordinate axis according to preset rules, and determining the position of the feeding port according to the abscissa and the ordinate of the feeding port.
According to the method and the device for determining the feed port of the high-temperature-resistant multimode satellite navigation antenna, which are provided by the embodiment of the invention, the performance of the antenna can be influenced after the high-temperature-resistant multimode satellite navigation antenna is added with the antenna housing. By obtaining the proper feed port of the GPS antenna, the performance of the antenna can be influenced due to the position of the feed port, and the performance of the Beidou antenna can be correspondingly changed after the feed port of the GPS antenna is changed. Therefore, the embodiment of the invention obtains the eccentric feed point of the GPS antenna after determining the reasonable position of the feed port of the GPS antenna, and carries out eccentric feed and metallized via hole on the GPS antenna, thereby realizing that the problem of performance degradation of the multimode satellite navigation antenna after the dielectric loading of the antenna housing is effectively avoided by changing the feed mode of the multimode satellite navigation antenna on the premise of not changing the physical structure and material of the antenna housing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of return loss of a GPS antenna before a radome is added in an embodiment of the invention;
FIG. 3 is an axial ratio diagram of the operating frequency of a GPS antenna before the radome is added in the embodiment of the invention;
FIG. 4 is a schematic diagram of return loss of a GPS antenna after a radome is added in an embodiment of the invention;
FIG. 5 is an axial ratio schematic diagram of a GPS antenna after the radome is added in an embodiment of the invention;
FIG. 6 is an axial ratio diagram of a GPS antenna with a feed position changed in the x direction according to an embodiment of the present invention;
FIG. 7 is an axial ratio diagram of a GPS antenna with a feed position changed in the y direction according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of return loss corresponding to a change in the position of a feed port of a GPS antenna according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating the callback loss of an optimized GPS antenna according to an embodiment of the present invention;
FIG. 10 is an axial ratio schematic diagram of an optimized GPS antenna in an embodiment of the present invention;
fig. 11 is a schematic return loss diagram of a Beidou antenna before a radome is added in the embodiment of the invention;
fig. 12 is an axial ratio schematic diagram of the Beidou antenna before the radome is added in the embodiment of the invention;
fig. 13 is a schematic return loss diagram of the Beidou antenna after the radome is added in the embodiment of the invention;
FIG. 14 is an axial ratio schematic diagram of the Beidou antenna after the radome is added in the embodiment of the invention;
FIG. 15 is a schematic diagram of return loss of the optimized Beidou antenna in the embodiment of the present invention;
FIG. 16 is an axial ratio schematic diagram of the optimized Beidou antenna in the embodiment of the invention;
fig. 17 is a schematic structural diagram of a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a method for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna in an embodiment of the present invention, and as shown in fig. 1, the method for determining a feed port of a multimode satellite navigation antenna in an embodiment of the present invention includes:
s1, establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, wherein the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna;
s2, searching along the coordinate axis according to a preset rule, acquiring the abscissa and the ordinate of the GPS antenna feed port meeting preset conditions, and determining the position of the feed port according to the abscissa and the ordinate of the feed port.
The antenna provided by the embodiment of the invention is a high-temperature-resistant multimode satellite navigation antenna, and comprises a GPS antenna and a Beidou antenna. In the embodiment of the invention, the GPS antenna of the multimode satellite navigation antenna is in a rectangular patch shape, a rectangular coordinate system is established by taking the geometric center of the rectangular GPS antenna as an origin, and the x axis and the y axis are respectively parallel to the side length of the rectangular GPS antenna. According to a preset rule, searching and acquiring an abscissa of a GPS antenna feed port meeting a preset condition along an x axis, similarly, searching and acquiring an ordinate of the GPS antenna feed port meeting the preset condition along a y axis, and determining the position of the GPS antenna feed port according to the acquired abscissa and ordinate meeting the preset condition, namely the final feed port can keep good working performance of the multimode satellite navigation antenna after the antenna housing is added.
The multimode satellite navigation antenna provided by the embodiment of the invention comprises a GPS antenna and a Beidou antenna, and as the antenna housing is arranged outside the antenna, the antenna housing reflects and absorbs an electromagnetic field generated by the antenna, so that the performance of the antenna can be changed. According to the embodiment of the invention, by obtaining the proper feed port of the GPS antenna, the performance of the antenna can be influenced due to the position of the feed port, and the performance of the Beidou antenna can be correspondingly changed after the feed port of the GPS antenna is changed. Therefore, after the reasonable position of the feed port of the GPS antenna is determined, the embodiment of the invention realizes that the problem of the performance degradation of the multimode satellite navigation antenna after the dielectric loading of the antenna housing is effectively avoided by changing the feed port of the GPS antenna of the multimode satellite navigation antenna on the premise of not changing the physical structure and the material of the antenna housing.
On the basis of the above embodiment, the searching along the coordinate axis according to a preset rule and acquiring the abscissa and the ordinate of the GPS antenna feed port that satisfy a preset condition includes: presetting a search distance and a search step length, and respectively searching along the positive and negative directions of the coordinate axis by taking the origin as a starting point according to the search distance and the search step length to obtain the abscissa and the ordinate of the GPS antenna feed port meeting the preset conditions.
Specifically, after a coordinate system is established, a search distance and a search step length are set, and search is performed along the positive direction and the negative direction of the x axis according to the set search distance and the set search step length by taking the origin of the coordinate system as a starting point, so as to obtain the abscissa of the GPS antenna feed port which meets the preset condition. And similarly, searching in the positive direction and the negative direction of the y axis according to the set searching distance and the set searching step length respectively to obtain the vertical coordinate of the GPS antenna feed port meeting the preset condition. It should be noted that the search distance and the search step length may be set according to actual needs by combining with the structure of the GPS antenna, and the search distance and the search step length in the x-axis direction and the search distance and the search step length in the y-axis direction may be set to the same or different values. The feeding port of the GPS antenna in the embodiment of the invention is deviated from the geometric center of the GPS antenna, namely, eccentric feeding is adopted, so that when searching in the directions of the x axis and the y axis, searching is respectively carried out from the geometric center of the GPS antenna to the positive and negative directions of the coordinate axis.
According to the method for determining the feed port of the high-temperature-resistant multi-mode satellite navigation antenna, provided by the embodiment of the invention, the position of the feed port of the GPS antenna is obtained from the geometric center of the GPS antenna along the positive and negative directions of the coordinate axis respectively, so that the feed port deviating from the geometric center of the GPS antenna is obtained, namely, the GPS antenna is fed eccentrically, and the position of the feed port meeting the preset condition is obtained. The problem that the performance of the multimode satellite navigation antenna is degraded after the dielectric of the antenna housing is loaded is effectively solved by changing the feeding mode of the multimode satellite navigation antenna on the premise of not changing the physical structure and the material of the antenna housing, so that the multimode satellite navigation antenna keeps good working performance after the antenna housing is added.
On the basis of the above embodiment, the preset conditions include: feeding the GPS antenna at the abscissa and the ordinate, wherein an axial ratio of the GPS antenna is less than 3 dB.
Specifically, after a coordinate system is established, searching along a coordinate axis according to a preset search step length, performing simulation feeding on a coordinate point searched each time, and if the GPS antenna is fed at the searched abscissa and ordinate, and the axial ratio of the GPS antenna is less than 3dB, determining that the abscissa and ordinate meet a preset condition, and further obtaining the position of a feeding port of the GPS antenna. In practical application, the search step length and the search distance can be set through simulation software, corresponding coordinate points are obtained every search step length in the search distance through the simulation software, an axial ratio image of the GPS antenna corresponding to the coordinate points is drawn, and the abscissa and the ordinate of the coordinate point corresponding to the image with the axial ratio smaller than 3dB are found to be the abscissa and the ordinate of the feed port meeting the preset conditions.
The GPS antenna in the multimode satellite navigation antenna provided by the embodiment of the invention is a circularly polarized antenna, and the axial ratio is an important performance index of the circularly polarized antenna and represents the purity of circular polarization. According to the embodiment of the invention, the coordinate point corresponding to the axial ratio smaller than 3dB is obtained as the feed port of the GPS antenna, so that the GPS antenna still has good performance after the antenna housing is added, and the influence of the antenna housing on the performance of the multimode satellite navigation antenna is eliminated.
On the basis of the above embodiment, the preset condition further includes: feeding the GPS antenna at the abscissa and the ordinate, the bandwidth of the return loss of the GPS antenna being within the operating frequency range of the GPS antenna.
Specifically, searching is carried out along a coordinate axis direction according to a preset searching distance and a preset searching direction, simulation feeding is carried out on a coordinate point searched each time, if the GPS antenna is fed at the searched abscissa and ordinate, the axial ratio of the GPS antenna is less than 3dB, and the return loss bandwidth is within the working frequency range of the GPS antenna, the abscissa and the ordinate are determined to meet a preset condition, and the position of a feeding port of the GPS antenna is further obtained. The working frequency range of the GPS antenna in the embodiment of the invention is 1575 +/-2.046 MHz. In practical application, a search step length and a search distance can be set through simulation software, corresponding coordinate points are obtained every search step length in the search distance through the simulation software, an axial ratio image and a return loss image of a GPS antenna corresponding to the coordinate points are drawn, and the abscissa and the ordinate of the coordinate point corresponding to an image with the return loss within the working frequency range of the GPS antenna and the axial ratio smaller than 3dB are found, namely the abscissa and the ordinate of the feed port meeting preset conditions.
According to the method for determining the feed port of the high-temperature-resistant multimode satellite navigation antenna, which is provided by the embodiment of the invention, the feed port with the axial ratio smaller than 3dB and the return loss within the working frequency range of the GPS antenna is obtained, so that the GPS antenna still has good performance after the antenna housing is added, and the influence of the antenna housing on the performance of the multimode satellite navigation antenna is eliminated.
On the basis of the above embodiment, the feed port is processed by a metalized via.
Specifically, since the GPS antenna of the multi-mode satellite navigation antenna provided in the embodiment of the present invention is on the upper layer, the feed port needs to pass through multiple layers of media, and thus needs to be plated with a via hole. The metallized through hole refers to a process that each layer of printed conductor is plated with a layer of conductive metal on the insulated hole wall by chemical plating and electroplating methods so as to ensure that the conductive metal is reliably communicated with each other. In the embodiment of the invention, the inner wall of the hole of the feed port is plated with copper, so that the GPS antenna can be well fed through the feed port.
According to the method for determining the feed port of the high-temperature-resistant multimode satellite navigation antenna, provided by the embodiment of the invention, the influence of the antenna housing on the working performance of the multimode satellite navigation antenna can be effectively eliminated by reasonably determining the position of the feed port of the GPS antenna and carrying out metallized via hole on the feed port.
The following describes a specific process of the method for determining the feed port of the multimode satellite navigation antenna in the embodiment of the invention by way of example, and verifies that the method provided by the embodiment of the invention can well eliminate the influence of the radome on the performance of the multimode satellite navigation antenna through simulation software.
After the multimode satellite navigation antenna is designed according to actual needs, the position of a feed port of the GPS antenna is determined and optimized again, the position of the feed port of the Beidou antenna is unchanged, and the feed port of the GPS antenna and the feed port of the Beidou antenna are subjected to metalized through holes. Fig. 2 is a schematic return loss diagram of the GPS antenna before the radome is added in the embodiment of the present invention, and fig. 3 is a schematic axial ratio diagram of the operating frequency of the GPS antenna before the radome is added in the embodiment of the present invention, as shown in fig. 2 and fig. 3, the GPS antenna before the radome is added has good circular polarization characteristics and impedance bandwidth in the operating frequency band thereof. Fig. 4 is a schematic return loss diagram of the GPS antenna with the radome in the embodiment of the present invention, and fig. 5 is a schematic axial ratio diagram of the GPS antenna with the radome in the embodiment of the present invention, as shown in fig. 4 and 5, after the radome is added, the GPS antenna may have the phenomena of a narrow return loss bandwidth, a poor axial ratio, and a severe degradation of circular polarization performance.
In the embodiment of the invention, HFSS (High Frequency Structure Simulator) simulation software is used for searching and optimizing the position of the feed port of the GPS antenna to determine the proper position of the feed port of the GPS antenna. A direct coordinate system is established by taking the geometric center of the GPS antenna as an origin, and the x axis and the y axis are respectively parallel to the side length of the rectangular GPS antenna. And inputting a search distance and a search step length in HFSS simulation software, searching along the x-axis direction, and acquiring the abscissa of the feed port of the proper GPS antenna. In the embodiment of the invention, the search distance is set to be 1mm, the search step length is set to be 0.2mm, and axial ratio diagrams at positions of 0.2mm, 0.4mm, 0.6mm, 0.8mm and 1mm of cheap quantity along the x axis are obtained respectively. Fig. 6 is an axial ratio schematic diagram of the GPS antenna with the feeding position changed in the x direction in the embodiment of the present invention, and as shown in fig. 6, it can be seen that as the offset in the x direction increases from 0.2mm to 1mm, the axial ratio shifts toward a high frequency, and when the offset is 0.6mm, the axial ratio is less than 3dB in the operating frequency range of the GPS, and the requirement of the axial ratio bandwidth is met, so that the abscissa of the feeding port of the GPS antenna is determined to be 0.6 mm. Similarly, in the y-axis direction, the vertical coordinate of the feed port of the GPS antenna is searched for in the same manner. Fig. 7 is a schematic diagram of the axial ratio of the GPS antenna at the feeding position for changing the Y direction in the embodiment of the present invention, as shown in fig. 7, as the offset in the Y direction increases from 4mm to 7mm, the return loss bandwidth is widened, and the axial ratio only satisfies the requirement at 4mm and 5mm, and as can be seen from fig. 7, at the offset distance of 5mm, the axial ratio is less than 3dB and is closest to the GPS operating frequency. Therefore, the ordinate of the feed port of the suitable GPS antenna is determined to be y ═ 5 mm. Fig. 8 is a schematic diagram of return loss corresponding to a change in the position of the GPS antenna feed port in the embodiment of the present invention, and as shown in fig. 8, when the position of the GPS antenna feed port is changed in the embodiment of the present invention, return loss bandwidths thereof are all within an operating frequency range of the GPS antenna.
The position of the feed port of the GPS antenna is determined to be x being 0.6mm, y being 5mm, namely the offset x of the geometric center of the GPS antenna along the x direction is 0.6mm, and the offset y of the geometric center of the GPS antenna along the y direction is 5 mm. The HFSS simulation software is used for carrying out simulation feeding at the feeding port to draw a return loss schematic diagram and an axial ratio schematic diagram of the GPS antenna, fig. 9 is a return loss schematic diagram of the optimized GPS antenna in the embodiment of the invention, and fig. 10 is an axial ratio schematic diagram of the optimized GPS antenna in the embodiment of the invention, as shown in fig. 9 and fig. 10, the axial ratio and the return loss of the optimized GPS antenna both meet performance requirements, and are similar to the axial ratio and the return loss performance of the GPS antenna before the radome is added, so that the position of the feeding port of the GPS antenna determined by adopting the embodiment of the invention can be seen, and the influence on the performance of the GPS antenna after the dielectric loading of the radome can be well avoided.
Because the improvement and the change of a GPS antenna in the multimode satellite navigation antenna can influence the current distribution of the Beidou antenna, the performance of the Beidou antenna is correspondingly improved while the position of a feed port of the GPS antenna is optimized. Fig. 11 is a schematic return loss diagram of the Beidou antenna before the radome is added in the embodiment of the invention, and fig. 12 is a schematic axial ratio diagram of the Beidou antenna before the radome is added in the embodiment of the invention, as shown in fig. 11 and 12, the GPS antenna before the radome is added has good circular polarization characteristics and impedance bandwidth in a working frequency band thereof. Fig. 13 is a schematic return loss diagram of the Beidou antenna after the radome is added in the embodiment of the invention, and fig. 14 is a schematic axial ratio diagram of the Beidou antenna after the radome is added in the embodiment of the invention, and as shown in fig. 13 and 14, the Beidou antenna has the phenomena of narrow return loss bandwidth, widened 3dB wave beam width, poor axial ratio and serious degradation of circular polarization performance. After the position of the feed port of the GPS antenna is determined, feeding simulation is performed on the Beidou antenna by using HFSS simulation software, fig. 15 is a schematic diagram of return loss of the optimized Beidou antenna in the embodiment of the invention, fig. 16 is a schematic diagram of axial ratio of the optimized Beidou antenna in the embodiment of the invention, as shown in fig. 15 and fig. 16, after the feed port of the GPS antenna is optimized and determined, the axial ratio and the return loss performance of the Beidou antenna are correspondingly improved, and are close to the axial ratio and the return loss performance of the GPS antenna before the radome is added, so that the position of the feed port of the GPS antenna determined by adopting the embodiment of the invention can well avoid the influence on the performance of the Beidou antenna after the dielectric loading of the radome.
Fig. 17 is a schematic structural diagram of a device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna in an embodiment of the present invention, and as shown in fig. 17, the device for determining a feed port of a multimode satellite navigation antenna in an embodiment of the present invention includes: a coordinate system establishing unit 170 and a feeding port position acquiring unit 171, wherein:
the coordinate system establishing unit 170 is configured to establish a rectangular coordinate system with a geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, where a coordinate axis of the rectangular coordinate system is parallel to a side length of the GPS antenna; the feeding port position obtaining unit 171 is configured to search and obtain an abscissa and an ordinate of the GPS antenna feeding port that satisfy a preset condition along the coordinate axis according to a preset rule, and determine the position of the feeding port according to the abscissa and the ordinate of the feeding port.
Specifically, the multimode satellite navigation antenna provided by the embodiment of the invention comprises a GPS antenna and a Beidou antenna, and the embodiment of the invention mainly determines the position of a proper feed port of the GPS antenna. In the embodiment of the present invention, the GPS antenna of the multi-mode satellite navigation antenna is a rectangular patch, and the coordinate system establishing unit 170 establishes a rectangular coordinate system with the geometric center of the rectangular GPS antenna as an origin, where an x axis and a y axis are respectively parallel to the side length of the rectangular GPS antenna. The feed port position obtaining unit 171 searches and obtains an abscissa of a GPS antenna feed port satisfying a preset condition along an x-axis according to a preset rule, similarly, searches and obtains an ordinate of the GPS antenna feed port satisfying the preset condition along a y-axis, and determines the position of the GPS antenna feed port according to the obtained abscissa and ordinate satisfying the preset condition, that is, the final feed port can keep good working performance of the multimode satellite navigation antenna after the antenna cover is added.
According to the device for determining the feed port of the high-temperature-resistant multimode satellite navigation antenna, the proper feed port of the GPS antenna is obtained through the feed port position obtaining unit, the antenna performance can be influenced due to the position of the feed port, and the performance of the Beidou antenna can be correspondingly changed after the feed port of the GPS antenna is changed. Therefore, after the reasonable position of the feed port of the GPS antenna is determined, the embodiment of the invention realizes that the problem of performance degradation of the multimode satellite navigation antenna after the dielectric loading of the antenna housing is effectively avoided by changing the feed mode of the multimode satellite navigation antenna on the premise of not changing the physical structure and the material of the antenna housing.
On the basis of the foregoing embodiment, the feeding port position acquiring unit is specifically configured to:
and presetting a search distance and a search step length, and respectively searching along the positive and negative directions of the coordinate axis by taking the original point as a starting point according to the search distance and the search step length to obtain the abscissa and the ordinate of the GPS antenna feed port which meet preset conditions.
Specifically, after the coordinate system is established by the coordinate system establishing unit, the feeding port position obtaining unit sets a search distance and a search step length, and searches according to the set search distance and the set search step length along the positive direction and the negative direction of the x axis with the origin of the coordinate system as a starting point, so as to obtain the abscissa of the feeding port of the GPS antenna, which meets the preset condition. And similarly, searching in the positive direction and the negative direction of the y axis according to the set searching distance and the set searching step length respectively to obtain the vertical coordinate of the GPS antenna feed port meeting the preset condition. The setting of the search distance and the search step length is consistent with the above embodiment, and will not be described herein again.
According to the device for determining the feed port of the high-temperature-resistant multi-mode satellite navigation antenna, provided by the embodiment of the invention, the position of the feed port of the GPS antenna is obtained from the geometric center of the GPS antenna along the positive and negative directions of the coordinate axis respectively through the feed port position obtaining unit so as to obtain the feed port deviating from the geometric center of the GPS antenna, namely, the GPS antenna is fed eccentrically, and the position of the feed port meeting the preset condition is obtained. The problem that the performance of the multimode satellite navigation antenna is degraded after the dielectric of the antenna housing is loaded is effectively solved by changing the feeding mode of the multimode satellite navigation antenna on the premise of not changing the physical structure and the material of the antenna housing, so that the multimode satellite navigation antenna keeps good working performance after the antenna housing is added.
On the basis of the above embodiment, the preset conditions include: feeding the GPS antenna at the abscissa and the ordinate of the feeding port, wherein the axial ratio of the GPS antenna is less than 3 dB.
Specifically, after the coordinate system is established by the coordinate system establishing unit, the feeding port position acquiring unit searches along the coordinate axis according to a preset search step length, and performs simulation feeding on the coordinate point searched each time, and if the GPS antenna is fed at the searched abscissa and ordinate, and the axial ratio of the GPS antenna is less than 3dB, it is determined that the abscissa and ordinate satisfy a preset condition, and the feeding port position of the GPS antenna is further obtained.
The GPS antenna in the multimode satellite navigation antenna provided by the embodiment of the invention is a circularly polarized antenna, and the axial ratio is an important performance index of the circularly polarized antenna and represents the purity of circular polarization. According to the embodiment of the invention, the coordinate point corresponding to the axial ratio smaller than 3dB is obtained as the feed port of the GPS antenna, so that the GPS antenna still has good performance after the antenna housing is added, and the influence of the antenna housing on the performance of the multimode satellite navigation antenna is eliminated.
On the basis of the above embodiment, the preset condition further includes: feeding the GPS antenna at the abscissa and the ordinate, the bandwidth of the return loss of the GPS antenna being within the operating frequency range of the GPS antenna.
Specifically, searching is carried out along a coordinate axis direction according to a preset searching distance and a preset searching direction, simulation feeding is carried out on a coordinate point searched each time, if the GPS antenna is fed at the searched abscissa and ordinate, the axial ratio of the GPS antenna is less than 3dB, and the return loss bandwidth is within the working frequency range of the GPS antenna, the abscissa and the ordinate are determined to meet a preset condition, and the position of a feeding port of the GPS antenna is further obtained. Wherein the working frequency range of the GPS antenna is 1575 +/-2.046 MHz.
According to the device for determining the feed port of the high-temperature-resistant multimode satellite navigation antenna, which is provided by the embodiment of the invention, the feed port with the axial ratio smaller than 3dB and the return loss within the working frequency range of the GPS antenna is obtained, so that the GPS antenna still has good performance after the antenna housing is added, and the influence of the antenna housing on the performance of the multimode satellite navigation antenna is eliminated.
On the basis of the above embodiment, the feed port is processed by a metalized via.
Specifically, since the GPS antenna of the multi-mode satellite navigation antenna provided in the embodiment of the present invention is on the upper layer, the feed port needs to pass through multiple layers of media, and thus needs to be plated with a via hole. In the embodiment of the invention, the inner wall of the hole of the feed port is plated with copper, so that the GPS antenna can be well fed through the feed port.
The device provided by the invention is used for executing the method, and the specific implementation mode of the device is consistent with that of the method, and is not described again here.
According to the multimode satellite navigation antenna feed port determining device provided by the embodiment of the invention, the feed port position of the GPS antenna is reasonably determined, and the feed port is subjected to metalized via hole, so that the influence of the antenna housing on the working performance of the multimode satellite navigation antenna can be effectively eliminated.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna is characterized by comprising the following steps:
arranging a high-temperature resistant antenna housing outside the multimode satellite navigation antenna, and establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multimode satellite navigation antenna as an origin, wherein the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna;
searching along the coordinate axis according to a preset rule, acquiring the abscissa and the ordinate of the GPS antenna feed port meeting preset conditions, and determining the position of the feed port according to the abscissa and the ordinate of the feed port;
the searching along the coordinate axis according to a preset rule and acquiring the abscissa and the ordinate of the GPS antenna feed port meeting a preset condition comprise the following steps: presetting a search distance and a search step length, and respectively searching along the positive and negative directions of the coordinate axis by taking the origin as a starting point according to the search distance and the search step length to obtain the abscissa and the ordinate of the GPS antenna feed port meeting the preset conditions.
2. The method according to claim 1, wherein the preset condition comprises: feeding the GPS antenna at the abscissa and the ordinate, wherein an axial ratio of the GPS antenna is less than 3 dB.
3. The method of claim 2, wherein the preset condition further comprises: feeding the GPS antenna at the abscissa and the ordinate, the bandwidth of the return loss of the GPS antenna being within the operating frequency range of the GPS antenna.
4. A method according to any of claims 1-3, wherein the feed port is treated with a metallized via.
5. A device for determining a feed port of a high-temperature-resistant multimode satellite navigation antenna is characterized by comprising:
the coordinate system establishing unit is used for establishing a rectangular coordinate system by taking the geometric center of a rectangular GPS antenna in the multi-mode satellite navigation antenna as an origin, and the coordinate axis of the rectangular coordinate system is parallel to the side length of the GPS antenna; a high-temperature resistant antenna housing is arranged outside the multimode satellite navigation antenna;
the feeding port position acquisition unit is used for respectively searching and acquiring the abscissa and the ordinate of the GPS antenna feeding port meeting preset conditions along the coordinate axis according to preset rules, and determining the position of the feeding port according to the abscissa and the ordinate of the feeding port;
the feed port position acquisition unit is specifically configured to:
and presetting a search distance and a search step length, and respectively searching along the positive and negative directions of the coordinate axis by taking the original point as a starting point according to the search distance and the search step length to obtain the abscissa and the ordinate of the GPS antenna feed port which meet preset conditions.
6. The apparatus of claim 5, wherein the preset condition comprises: feeding the GPS antenna at the abscissa and the ordinate of the feeding port, wherein the axial ratio of the GPS antenna is less than 3 dB.
7. The apparatus of claim 6, wherein the preset condition further comprises: feeding the GPS antenna at the abscissa and the ordinate of the feeding port, wherein the return loss bandwidth of the GPS antenna is within the working frequency range of the GPS antenna.
8. The apparatus of any of claims 5-7, wherein the feed port is treated with a metalized via.
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| CN201611052702.XA CN106803614B (en) | 2016-11-24 | 2016-11-24 | Method and device for determining feed port of high-temperature-resistant multi-mode satellite navigation antenna |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587984A (en) * | 2009-06-18 | 2009-11-25 | 上海交通大学 | Be positioned at the broadband miniaturization four-terminal port antennae on the cylindrical conductor platform |
| CN102299416A (en) * | 2011-06-02 | 2011-12-28 | 厦门大学 | Micro-strip big dipper slot antenna array containing close packing PBG (photonic band gap) and coupling cavity |
| CN102769183A (en) * | 2012-07-13 | 2012-11-07 | 厦门大学 | Quadruple spiral distribution loading oscillator microstrip antenna applied to Beidou system |
| CN103560321A (en) * | 2013-11-05 | 2014-02-05 | 南京邮电大学 | Dual-frequency wide-band antenna of eccentric feed slot asymmetric vibrator-slot line composite structure |
| CN104239633A (en) * | 2014-09-11 | 2014-12-24 | 西安电子科技大学 | Method for predicting influence of brazing holes on microwave device transmission performance |
| CN105048074A (en) * | 2015-08-11 | 2015-11-11 | 北京东方联星科技有限公司 | Satellite navigation circularly polarized microstrip antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011122039B3 (en) * | 2011-12-22 | 2013-01-31 | Kathrein-Werke Kg | Patch antenna assembly |
-
2016
- 2016-11-24 CN CN201611052702.XA patent/CN106803614B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587984A (en) * | 2009-06-18 | 2009-11-25 | 上海交通大学 | Be positioned at the broadband miniaturization four-terminal port antennae on the cylindrical conductor platform |
| CN102299416A (en) * | 2011-06-02 | 2011-12-28 | 厦门大学 | Micro-strip big dipper slot antenna array containing close packing PBG (photonic band gap) and coupling cavity |
| CN102769183A (en) * | 2012-07-13 | 2012-11-07 | 厦门大学 | Quadruple spiral distribution loading oscillator microstrip antenna applied to Beidou system |
| CN103560321A (en) * | 2013-11-05 | 2014-02-05 | 南京邮电大学 | Dual-frequency wide-band antenna of eccentric feed slot asymmetric vibrator-slot line composite structure |
| CN104239633A (en) * | 2014-09-11 | 2014-12-24 | 西安电子科技大学 | Method for predicting influence of brazing holes on microwave device transmission performance |
| CN105048074A (en) * | 2015-08-11 | 2015-11-11 | 北京东方联星科技有限公司 | Satellite navigation circularly polarized microstrip antenna |
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