WO2024036856A1 - 一种双极化高隔离度卡塞格伦天线 - Google Patents

一种双极化高隔离度卡塞格伦天线 Download PDF

Info

Publication number
WO2024036856A1
WO2024036856A1 PCT/CN2022/140664 CN2022140664W WO2024036856A1 WO 2024036856 A1 WO2024036856 A1 WO 2024036856A1 CN 2022140664 W CN2022140664 W CN 2022140664W WO 2024036856 A1 WO2024036856 A1 WO 2024036856A1
Authority
WO
WIPO (PCT)
Prior art keywords
port
isolation
dual
diagonal
polarization
Prior art date
Application number
PCT/CN2022/140664
Other languages
English (en)
French (fr)
Inventor
葛俊祥
林海
汪洁
祁博宇
Original Assignee
南京信息工程大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京信息工程大学 filed Critical 南京信息工程大学
Priority to US18/454,421 priority Critical patent/US20240063552A1/en
Publication of WO2024036856A1 publication Critical patent/WO2024036856A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Definitions

  • the invention relates to the field of microwave and millimeter wave radio frequency antennas, and specifically to a dual-polarization high-isolation Cassegrain antenna system used in millimeter-wave weather radar and communications.
  • Millimeter waves refer to electromagnetic waves with a frequency range of 30-300GHz, and are widely used in fields such as millimeter wave relay communications, radar, remote sensing and missile guidance.
  • the antenna is an important part of the radar system and communication system. Its main function is to transmit and receive radio frequency detection signals according to the design requirements.
  • dual-polarized antennas are required to have good high gain, low loss, high isolation, high power characteristics, excellent cross-polarization characteristics and consistent port radiation gain patterns.
  • General microstrip antennas or antennas based on new electromagnetic materials have problems such as relatively large losses, high side lobes, unsatisfactory gain, and low power endurance.
  • Reflector antennas and Cassegrain antennas have the advantages of simple structure, high efficiency, small loss, small side lobes, high gain, and strong power resistance. Therefore, it is still widely used in millimeter wave radar and remote sensing systems.
  • Circularly polarized antennas designed based on satellite communications mainly focus on the polarization characteristics of the antenna.
  • the polarization isolation characteristics of the existing antenna ports are not high, the port isolation is low, and they do not fully meet the weather radar parameter requirements.
  • the present invention aims to address the shortcomings of the existing technology and design a dual-polarization high-isolation Cassegrain with a simple structure and highly consistent port radiation directions for the application of dual-polarization weather radar and millimeter-wave long-distance communication systems. antenna.
  • the present invention adopts the following technical solutions.
  • a dual-polarization high-isolation Cassegrain antenna including a main reflecting surface, a secondary reflecting surface and a diagonal horn feed;
  • the diagonal horn feed includes an integrated cross-polarization coupling structure and a diagonal horn protrusion Structure, the hollow part of the diagonal horn protruding structure is diagonal horn-shaped, and the horn opening is upward;
  • corrugated wires are provided in the diagonal horn feed source, and the corrugated wires penetrate the diagonal horn protruding structure and the cross-polarized coupling structure;
  • the cross-polarization coupling structure includes a first port and a second port.
  • the second port is located on the side of the cross-polarization coupling structure, and its access port is connected to the side of the corrugated wire.
  • the first port is located on the bottom surface of the cross-polarization coupling structure. And connected to the bottom of the corrugated lines.
  • a second port left cross-section matching adjustment structure is provided at the access port of the left cross-section of the second port
  • a first matching adjustment structure of the second right cross-section of the second port is provided at the access port of the right cross-section of the second port.
  • a second matching adjustment structure is provided on the right section of the second port at a set distance from the access port of the second port.
  • sub-reflective surface is connected to the fixed plate, and the fixed surface is connected to the main reflective surface through the sub-reflective surface bracket structure.
  • the sub-reflective surface bracket structure is four rhombus prisms, one end of each rhombus prism is connected to the fixed surface, and the other end is connected to the edge of the main reflective surface.
  • the diagonal horn feed includes a portion connected to a fixed base plate, and the fixed base plate is used to install and fix the dual-polarized high-isolation Cassegrain antenna.
  • the dual-polarized high-isolation Cassegrain antenna of the present invention achieves good performance by arranging a main reflecting surface, a sub-reflecting surface and a diagonal horn feed, and by providing a special diagonal horn feed structure. Port isolation and radiation cross-polarization characteristics.
  • the dual-polarization high-isolation Cassegrain antenna of the present invention uses a diagonal horn as the basic feed structure of the antenna.
  • the dual-polarization high-isolation Cassegrain antenna is designed with dual-polarization characteristics to make the antenna Feeding the two ports separately results in almost identical radiation patterns, which has a good effect on improving the detection sensitivity of the radar and the consistency of the two polarization detections.
  • the dual-polarized high-isolation Cassegrain antenna of the present invention achieves good port matching through the structure of the second port, effectively reducing the complexity of the antenna's later debugging.
  • Figure 1 is a schematic structural diagram of an embodiment of the present invention.
  • Figure 2 is a structural cross-sectional view of an embodiment of the present invention.
  • Figure 3 is a detailed schematic diagram of the structure of the diagonal horn feed according to the embodiment of the present invention.
  • Figure 4 is a schematic diagram 2 of the structural details of the diagonal horn feed according to the embodiment of the present invention.
  • Figure 5 is a schematic diagram 3 of the structural details of the diagonal horn feed according to the embodiment of the present invention.
  • Figure 6 is a schematic diagram 4 of the structural details of the diagonal horn feed according to the embodiment of the present invention.
  • Figure 7 is a standing wave test diagram of port 1 according to the embodiment of the present invention.
  • Figure 8 is a standing wave test diagram of port 2 according to the embodiment of the present invention.
  • Figure 9 is a port isolation test diagram according to the embodiment of the present invention.
  • Figure 10 is a test diagram of the direction pattern of port 1E according to the embodiment of the present invention.
  • Figure 11 is a test diagram of the direction pattern of port 1H according to the embodiment of the present invention.
  • Figure 12 is a test diagram of the direction pattern of port 2E according to the embodiment of the present invention.
  • Figure 13 is a test diagram of the direction pattern of port 2H according to the embodiment of the present invention.
  • Embodiment 1 A dual-polarized high-isolation Cassegrain antenna, including: a main reflecting surface 1, a secondary reflecting surface 2 and a diagonal horn feed 4;
  • the diagonal horn feed 3 includes an integrated cross-polarized coupling structure 8 and a diagonal horn protruding structure 10.
  • the hollow part of the diagonal horn protruding structure 10 is in the shape of a diagonal horn, with the horn opening upward; the diagonal horn feed 3 is provided with flutes.
  • Line 7, and the corrugated line 7 runs through the diagonal horn protruding structure 10 and the cross-polarized coupling structure 8;
  • the cross-polarization coupling structure 8 includes a first port and a second port.
  • the second port is located on the side of the diagonal horn feed, and its access port is connected to the corrugated wire 7 .
  • the first port is located on the bottom surface of the diagonal horn feed, and the access port is Connected to the bottom of corrugated line 7.
  • the main reflective surface 1 is a paraboloid, and the sub-reflective surface 2 is a hyperboloid.
  • the focus of the main reflective surface 1 coincides with the focus of the upper curved surface of the sub-reflective surface 2; the diagonal horn feed 3 is located on the main reflective surface. 1 at the middle bottom, the radiation phase center of the diagonal horn feed 3 is coincident with the common focus of the sub-reflector 1.
  • the sub-reflective surface is located above the main reflective surface and the feed source, and its second focus coincides with the focus F2 of the main reflective surface.
  • the radiation phase center of the diagonal horn feed is located at the first focus F1 of the sub-reflector.
  • the diagonal horn feed 3 is located at the middle bottom of the main reflective surface 1.
  • screws are used to fix and fit the main reflective surface 1.
  • the diagonal horn feed is a diagonal horn antenna
  • the two input ports are two mutually perpendicular incidence ports using the WR10 standard waveguide, which are the first port and the second port respectively.
  • the left section 31 of the first port and the right section 32 of the first port are shown in Figures 3 and 4;
  • the second port left section matching adjustment structure 33 is provided at the left section of the inlet of the second port, and the right section of the inlet of the second port is
  • the first matching modulation structure 34 is provided in the right section of the second port, the left section 81 of the cross-polarization coupling structure; 82 - the right section 82 of the cross-polarization coupling structure, as shown in Figures 5 and 6.
  • the access port of the second port reduces the influence of the access port of the second port on the current when the first port emits electromagnetic waves through the second port left cross-section matching adjustment structure 33 and the second port right cross-section first matching adjustment structure 34 .
  • the method in which the second port is connected to the feed horn through the matching adjustment structure 33 on the left section of the second port and the first matching adjustment structure 34 on the right section of the second port can effectively reduce the impact of the opening of the second port on the current of the first port. , reducing the impact of the access of the second port on the radiation pattern of the diagonal horn feed 3, which is beneficial to the matching adjustment of the second port and the improvement of the isolation between the ports.
  • the second matching adjustment structure 35 of the right cross-section of the second port is provided at a set distance from the access port of the second port.
  • the sub-reflective surface 2 is connected to the fixed disk 5, and the fixed disk 5 is connected to the main reflective surface 1 through the sub-reflective surface support structure 4.
  • the sub-reflector support structure 4 is composed of four rhombus-shaped prisms, one end of each rhombus prism is connected to the fixed plate 5, and the other end is connected to the edge fixing point 6 of the main reflective surface 1.
  • the angle between each rhombus prism and the corrugated line 7 of the diagonal horn feed 3 is
  • the diagonal horn feed 3 includes a portion connected to the fixed base plate 11 , and the fixed base plate 11 is used to install and fix the dual-polarized high-isolation Cassegrain antenna.
  • the height h 2 of the second matching adjustment structure 35 in the right section 0.35mm, the width w 2 of the matching adjustment structure 33 in the left section of the second port is 1.04mm, and the width w 3 of the second matching adjustment structure 35 in the right section of the second port
  • the heights of the first matching adjustment structure 34 in the right section of the second port and the second matching adjustment structure 35 in the right section of the second port are the same, and the width of the first matching adjustment structure 34 in the right section of the second port is greater than that of the second matching adjustment structure 35 in the right section of the second port.
  • the profile second matches the width of the adjustment structure 35 .
  • the standing wave test results of the first port and the second port of the actual diagonal horn feed 3 are shown.
  • the standing wave ratio of the second port in the 93.2-95.3GHz range is less than 1.5:1, and the first port matches well in the entire frequency band of 90-100GHz.
  • FIG. 9 is a test result of the isolation between the first port and the second port of the actual diagonal horn feed 3. In the 93.2-95.3GHz range, the isolation between the two ports is greater than 50dB.
  • the test results of the radiation pattern of the E-plane of the first port of the physical dual-polarized high-isolation Cassegrain antenna are shown.
  • the gain of the antenna is 50.85dB
  • the side lobe is -25.2dB
  • the 3dB beam width is 0.42 °
  • cross-polarization is better than 39dB.
  • the test results of the radiation pattern of the H plane of the first port of the physical dual-polarized high-isolation Cassegrain antenna are shown.
  • the gain of the antenna is 50.85dB
  • the side lobe is -26dB
  • the 3dB beam width is 0.415°.
  • cross-polarization is better than 37dB.
  • the radiation pattern test results of the dual-polarized high-isolation Cassegrain antenna are shown.
  • the standing waves and isolation of the first port and the second port meet the engineering technical requirements of the application background of the present invention.
  • the test results of the radiation patterns of the E and H planes of the two ports of the antenna are consistent, which is in line with the original design intention of the present invention.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)

Abstract

本发明公开了一种双极化高隔离度卡塞格伦天线，包括主反射面、副反射面和对角喇叭馈源；对角喇叭馈源包括一体的交叉极化耦合结构和对角喇叭突出结构，对角喇叭突出结构中空部为对角喇叭状，喇叭开口向上；对角喇叭馈源内设置楞线，且楞线贯穿对角喇叭突出结构和交叉极化耦合结构；交叉极化耦合结构包括第一端口和第二端口，第二端口位于对角喇叭馈源的侧面，其接入口联通对角喇叭的楞线，第一端口位于对角喇叭馈源的底面。本发明的双极化高隔离度卡塞格伦天线，通过设置主反射面、副反射面和对角喇叭馈源，通过提供的特殊的对角喇叭馈源的结构，实现了良好的端口隔离度与辐射交叉极化特性。

Description

一种双极化高隔离度卡塞格伦天线 技术领域
本发明涉及微波毫米波射频天线领域，具体而言涉及一种应用于毫米波气象雷达与通信的双极化高隔离度卡塞格伦天线系统。
背景技术
毫米波是指频率范围为30-300GHz的电磁波，在毫米波中继通信、雷达、遥感和导弹制导等领域中应用较多。
目前毫米波气象雷达大多工作在35GHz、94GHz、140GHz、220GHz等作为工作频点。140GHz、220GHz大多处于基础研发阶段。目前主要的研究与应用还集中在35GHz与94GHz。相比于35GHz的毫米波气象雷达系统，工作于94GHz的气象雷达具有更高的分辨率、更小的体积、更强的探知能力，对于分析与反演早期云体结构与云粒子的分布具有重要意义，是目前研究和应用的热点。双极化雷达可以发射与接收两个极化的电磁波，相比于单极化雷达，双极化可以获得目标物在两个垂直方向的散射特性，这对于雷达的探测与分析能力判断能力具有重要的意义，是气象雷达研究与应用的一个重点。
天线是雷达系统和通信系统的重要组成部分，它的主要功能把射频探测信号按照设计要求发射与接收。在气象雷达系统应用中，要求双极化天线具有良好的高增益、低损耗、高隔离度、高功率特性，优秀的交叉极化特性与一致的端口辐射增益方向图。一般的微带天线或基于新型电磁材料的天线的损耗比较大，旁瓣高、增益不够理想、耐功率能力较低的问题。反射面天线、卡塞格伦天线具有结构简单、效 率高、损耗小、旁瓣小、增益高、耐功率性强的优点。所以依然广泛使用与毫米波雷达和遥感系统中。
基于卫星通信设计的圆极化天线因为主要关注天线的极化特性，但现有的天线的端口的极化隔离特性不高，端口隔离度较低，不完全满足气象雷达参数要求。
发明内容
本发明旨在针对现有技术存在的不足，为双极化气象雷达与毫米波远距离通信系统的应用，设计一种结构简单、端口辐射方向高度一致的双极化高隔离度卡塞格伦天线。
为实现上述技术目的，本发明采用以下技术方案。
提供一种双极化高隔离度卡塞格伦天线，包括主反射面、副反射面和对角喇叭馈源；所述对角喇叭馈源包括一体的交叉极化耦合结构和对角喇叭突出结构，所述对角喇叭突出结构中空部为对角喇叭状，喇叭开口向上；对角喇叭馈源内设置楞线，且所述楞线贯穿对角喇叭突出结构和交叉极化耦合结构；
所述交叉极化耦合结构包括第一端口和第二端口，第二端口位于交叉极化耦合结构的侧面，其接入口连通楞线的侧部，第一端口位于交叉极化耦合结构的底面，且连通所述楞线的底部。
进一步地，第二端口左剖面的接入口处设置第二端口左剖面匹配调结构，第二端口右剖面的接入口处设置第二端口右剖面第一匹配调结构。
再进一步地，第二端口的右剖面上距离第二端口的接入口设定距 离设置第二端口右剖面第二匹配调结构。
进一步地，所述副反射面连接在固定盘上，所述固定面通过副反射面支架结构连接在主反射面上。
再进一步地，所述副反射面支架结构为4个菱形棱柱，各菱形棱柱的一端连接固定面上，另一端连接主反射面的边缘。
进一步地，所述对角喇叭馈源包括连接固定底板的部位，所述固定底板用于安装和固定所述双极化高隔离度卡塞格伦天线。
本发明所取得的有益技术效果：
(1)本发明的双极化高隔离度卡塞格伦天线，通过设置主反射面、副反射面和对角喇叭馈源，通过提供的特殊的对角喇叭馈源的结构，实现了良好的端口隔离度与辐射交叉极化特性。
(2)本发明的双极化高隔离度卡塞格伦天线使用对角喇叭作为天线的馈源基本结构，设计具有双极化特性的双极化高隔离度卡塞格伦天线，使天线在两个端口分别馈电使具有几乎完全一致的辐射方向图，对于提高雷达的探测灵敏度与两个极化探测的一致性具有良好的作用。
(3)本发明的双极化高隔离度卡塞格伦天线通过第二端口的结构实现端口的良好匹配，有效降低天线在后期的调试的复杂度。
附图说明
附图不意在按比例绘制。在附图中，在各个图中示出的每个相同或近似相同的组成部分可以用相同的标号表示。为了清晰起见，在每 个图中，并非每个组成部分均被标记。现在，将通过例子并参考附图来描述本发明的各个方面的实施例，其中：
图1是本发明实施例的结构示意图。
图2是本发明实施例的结构剖面图；
图3是本发明实施例对角喇叭馈源的结构细节示意图一；
图4是本发明实施例对角喇叭馈源的结构细节示意图二；
图5是本发明实施例对角喇叭馈源的结构细节示意图三；
图6是本发明实施例对角喇叭馈源的结构细节示意图四；
图7为本发明实施例的端口1驻波测试图；
图8为本发明实施例的端口2驻波测试图；
图9为本发明实施例的端口隔离度测试图；
图10为本发明实施例的端口1E面方向图测试图；
图11为本发明实施例的端口1H面方向图测试图；
图12为本发明实施例的端口2E面方向图测试图；
图13为本发明实施例的端口2H面方向图测试图；
其中附图标记：1-主反射面；2-副反射面；3-对角喇叭馈源；4-反射面支架结构；5-固定盘；6-边缘固定点；7-楞线；8-交叉极化耦合结构；81-交叉极化耦合结构左剖面；82-交叉极化耦合结构右剖面；9-对角喇叭馈源底面；10-对角喇叭突出结构；11-固定底板；31-第一端口左剖面；32-第一端口右剖面；33-第二端口左剖面匹配调结构；34-第二端口右剖面第一匹配调结构；35-第二端口右剖面第二匹配调结构。
具体实施方式
为了更了解本发明的技术内容，特举具体实施例并配合所附图式说明如下。
在本发明专利的描述中，需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，除了包含所列的那些要素，而且还可包含没有明确列出的其他要素。
在本发明专利的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明专利和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明专利的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
实施例1：一种双极化高隔离度卡塞格伦天线，包括：主反射面1、副反射面2和对角喇叭馈源4；
对角喇叭馈源3包括一体的交叉极化耦合结构8和对角喇叭突出结构10，对角喇叭突出结构10中空部为对角喇叭状，喇叭开口向上；对角喇叭馈源3内设置楞线7，且所述楞线7贯穿对角喇叭突出结构10和交叉极化耦合结构8；
交叉极化耦合结构8包括第一端口和第二端口，第二端口位于对角喇叭馈源的侧面，其接入口连通楞线7，第一端口位于对角喇叭馈源的底面，且接入口连通楞线7的底部。
本实施例中，主反射面1为抛物面，副反射面2为双曲面，主反射面1的焦点与副反射面2的位于上面的曲面的焦点重合；对角喇叭馈源3位于主反射面1中间底部，对角喇叭馈源3的辐射相位中心位于副反射面1的公共焦点重合。
参照图1与图2，本实施例中，副反射面位于主反射面与馈源的上方、其第二焦点与主反射面的焦点F2重合。对角喇叭馈源的辐射相位中心位于副反射面第一焦点F1上。对角喇叭馈源3位于主反射面1中间底部，可选地，使用螺钉与主反射面1固定贴合。
参照图3和图4，所述对角喇叭馈源化对角喇叭天线，两个输入端口为使用WR10标准波导的两个相互垂直入射端口，分别为第一端口和第二端口。第一端口左剖面31和第一端口右剖面32如图3和图4所示；第二端口的接入口左剖面处设置第二端口左剖面匹配调结构33，第二端口的接入口右剖面处设置第二端口右剖面第一匹配调结构34，交叉极化耦合结构左剖面81；82-交叉极化耦合结构右剖面82，如图5和图6所示。
第二端口的接入口通过第二端口左剖面匹配调结构33与第二端口右剖面第一匹配调结构34降低了第二端口的接入口对第一端口发射电磁波时的电流的影响。第二端口通过第二端口左剖面匹配调结构33与第二端口右剖面第一匹配调结构34接入馈源喇叭的方法可以有效减小了第二端口的开口对第一端口的电流的影响，减小第二端口的接入对对角喇叭馈源3的辐射方向图的影响，有利于第二端口的匹配调节与端口间的隔离度提高。
在其它实施例中，距离第二端口的接入口设定距离设置第二端口右剖面第二匹配调结构35，通过距离接入口一段距离的设置该匹配调结构实现良好的端口匹配。
本实施例中，副反射面2连接在固定盘5上，固定盘5通过副反射面支架结构4连接在主反射面1上。
副反射面支架结构4为4个菱形棱柱，各菱形棱柱的一端连接固定盘5，另一端连接主反射面1的边缘固定点6。可选地，各菱形棱柱与对角喇叭馈源3的楞线7的角度
Figure PCTCN2022140664-appb-000001
进一步地，在其他实施例中，对角喇叭馈源3包括连接固定底板11的部位，固定底板11用于将安装和固定所述双极化高隔离度卡塞格伦天线。
图2中的参数数据为主反射面1的半径R 1＝270mm,副反射面2的半径r 1＝41.5mm,主反射面1的焦距f 1＝201.8mm,副反射面2的焦距f 2＝66.8mm,副反射面2的顶点与焦点F1的距离c 1＝24.8mm,对角喇叭馈源3的波束角度宽度
Figure PCTCN2022140664-appb-000002
图3、图4图5和图6中的参数尺寸数据为，对角喇叭馈源3的边长a 1＝9mm,对角喇叭突出结构10的长度l 1＝77.6mm,交叉极化耦合结构8的馈源安装固定长度l 2＝30mm,交叉极化耦合结构8馈源安装固定宽度l 4＝10mm,第二端口2的波导长度l 5＝24.36mm,第二端口距离对角喇叭馈源底面9的距离l 6＝13mm,第二端口左剖面匹配调结构33与楞线7的距离l 7＝4.27mm,第二端口左剖面匹配调结构33的高度h 1＝0.385mm,第二端口右剖面第二匹配调结构35的高度h 2＝0.35mm,第二端口左剖面匹配调结构33的宽度w 2＝1.04mm,第二端口右剖面第二匹配调结构35的宽度w 3＝0.4mm。可 选地，第二端口右剖面第一匹配调结构34和第二端口右剖面第二匹配调结构35的高度相同，且第二端口右剖面第一匹配调结构34的宽度大于第二端口右剖面第二匹配调结构35的宽度。
本发明的技术效果可以通过以下性能测试进一步说明。
参照图7和图8是对实物对角喇叭馈源3的第一端口与第二端口的驻波测试结果。第二端口在93.2-95.3GHz范围内的驻波比小于1.5:1，第一端口在90-100GHz整个频段内匹配良好。
参照图9是对实物对角喇叭馈源3的第一端口与第二端口间的隔离度的测试结果。在93.2-95.3GHz范围内，两个端口之间的隔离度大于50dB。
参照图10是对实物双极化高隔离度卡塞格伦天线的第一端口的E面的辐射方向图的测试结果，天线的增益为50.85dB,旁瓣为-25.2dB，3dB波束宽度0.42°，交叉极化优于39dB。
参照图11是对实物双极化高隔离度卡塞格伦天线的第一端口的H面的辐射方向图的测试结果，天线的增益为50.85dB,旁瓣为-26dB，3dB波束宽度0.415°，交叉极化优于37dB。
参照图12是对实物双极化高隔离度卡塞格伦天线的第二端口的H面的辐射方向图的测试结果，天线的增益为50.85dB,旁瓣为-26dB，3dB波束宽度0.42°，交叉极化优于37dB。
参照图13是对实物双极化高隔离度卡塞格伦天线的第二端口的H面的辐射方向图的测试结果，天线的增益为50.85dB,旁瓣为-25.5dB，3dB波束宽度0.42°，交叉极化优于37dB。
参照图7～图13为对双极化高隔离度卡塞格伦天线的辐射方向 图测试结果，第一端口与第二端口的驻波与隔离度满足本发明的应用背景的工程技术要求，天线的两个端口的E和H面的辐射方向图的测试结果一致性较好，符合本发明的设计初衷。
虽然本发明已以较佳实施例揭露如上，然其并非用以限定本发明。本发明所属技术领域中具有通常知识者，在不脱离本发明的精神和范围内，当可作各种的更动与润饰。因此，本发明的保护范围当视权利要求书所界定者为准。

Claims (10)

  1. 一种双极化高隔离度卡塞格伦天线，其特征在于，包括主反射面、副反射面和对角喇叭馈源；所述对角喇叭馈源包括一体的交叉极化耦合结构和对角喇叭突出结构，所述对角喇叭突出结构中空部为对角喇叭状，喇叭开口向上；对角喇叭馈源内设置楞线，且所述楞线贯穿对角喇叭突出结构和交叉极化耦合结构；
    所述交叉极化耦合结构包括第一端口和第二端口，第二端口位于交叉极化耦合结构的侧面，其接入口连通楞线的侧部，第一端口位于交叉极化耦合结构的底面，且连通所述楞线的底部。
  2. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，第二端口左剖面的接入口处设置第二端口左剖面匹配调结构，第二端口右剖面的接入口处设置第二端口右剖面第一匹配调结构。
  3. 根据权利要求2所述的一种双极化高隔离度卡塞格伦天线，其特征在于，第二端口的右剖面上距离第二端口的接入口设定距离设置第二端口右剖面第二匹配调结构。
  4. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，所述副反射面连接在固定盘上，所述固定面通过副反射面支架结构连接在主反射面上。
  5. 根据权利要求4所述的一种双极化高隔离度卡塞格伦天线，其特征在于，所述副反射面支架结构为4个菱形棱柱，各菱形棱柱的一端连接固定面上，另一端连接主反射面的边缘。
  6. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，所述对角喇叭馈源包括连接固定底板的部位，所述固定底板 用于安装和固定所述双极化高隔离度卡塞格伦天线。
  7. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，对角喇叭突出结构中喇叭的边长设置为9mm。
  8. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，对角喇叭突出结构的长度设置为77.6mm。
  9. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，第二端口的波导长度设置为24.36mm。
  10. 根据权利要求1所述的一种双极化高隔离度卡塞格伦天线，其特征在于，第二端口距离对角喇叭馈源底面设置为13mm。
PCT/CN2022/140664 2022-08-18 2022-12-21 一种双极化高隔离度卡塞格伦天线 WO2024036856A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/454,421 US20240063552A1 (en) 2022-08-18 2023-08-23 Dual-polarization high-isolation cassegrain antenna

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210991388.0A CN115360532B (zh) 2022-08-18 2022-08-18 一种双极化高隔离度卡塞格伦天线
CN202210991388.0 2022-08-18

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/454,421 Continuation US20240063552A1 (en) 2022-08-18 2023-08-23 Dual-polarization high-isolation cassegrain antenna

Publications (1)

Publication Number Publication Date
WO2024036856A1 true WO2024036856A1 (zh) 2024-02-22

Family

ID=84003175

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/140664 WO2024036856A1 (zh) 2022-08-18 2022-12-21 一种双极化高隔离度卡塞格伦天线

Country Status (2)

Country Link
CN (1) CN115360532B (zh)
WO (1) WO2024036856A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115360532B (zh) * 2022-08-18 2023-05-23 南京信息工程大学 一种双极化高隔离度卡塞格伦天线

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080980A1 (en) * 2009-09-03 2011-04-07 Troll Systems Corporation Multi-feed diversity receive system and method
US20180254547A1 (en) * 2017-01-06 2018-09-06 California Institute Of Technology Deployable reflectarray antenna
CN109301499A (zh) * 2018-11-13 2019-02-01 南京信息工程大学 Ka/W双频双极化高隔离度高增益卡塞格伦天线
CN115360532A (zh) * 2022-08-18 2022-11-18 南京信息工程大学 一种双极化高隔离度卡塞格伦天线

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2380802C1 (ru) * 2008-11-17 2010-01-27 Джи-хо Ан Компактная многолучевая зеркальная антенна
CN109378596A (zh) * 2018-10-19 2019-02-22 上海航天测控通信研究所 八频段双极化单脉冲双反射面天线
CN111987475B (zh) * 2020-08-04 2022-05-13 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) X/Ku频段极化可扭转双极化波纹喇叭馈源

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080980A1 (en) * 2009-09-03 2011-04-07 Troll Systems Corporation Multi-feed diversity receive system and method
US20180254547A1 (en) * 2017-01-06 2018-09-06 California Institute Of Technology Deployable reflectarray antenna
CN109301499A (zh) * 2018-11-13 2019-02-01 南京信息工程大学 Ka/W双频双极化高隔离度高增益卡塞格伦天线
CN115360532A (zh) * 2022-08-18 2022-11-18 南京信息工程大学 一种双极化高隔离度卡塞格伦天线

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WANG JIE, LIN HAI, YANG FAN, XU GUANGYANG, GE JUNXIANG: "Design of 94GHz Dual-Polarization Antenna Fed by Diagonal Horn for Cloud Radars", IEEE ACCESS, IEEE, USA, vol. 10, 1 January 2022 (2022-01-01), USA , pages 22480 - 22486, XP093139994, ISSN: 2169-3536, DOI: 10.1109/ACCESS.2022.3154483 *

Also Published As

Publication number Publication date
CN115360532B (zh) 2023-05-23
CN115360532A (zh) 2022-11-18

Similar Documents

Publication Publication Date Title
CN107086362B (zh) 一种共形低副瓣波导缝隙阵列天线
US5451969A (en) Dual polarized dual band antenna
US4673943A (en) Integrated defense communications system antijamming antenna system
Ando et al. A radial line slot antenna for 12 GHz satellite TV reception
US6137449A (en) Reflector antenna with a self-supported feed
US5959590A (en) Low sidelobe reflector antenna system employing a corrugated subreflector
CN106129593B (zh) 一种二维宽角度扫描的全金属相控阵雷达天线单元
US3195137A (en) Cassegrainian antenna with aperture blocking correction
US7852280B2 (en) Broadband structurally-embedded conformal antenna
CN109786944A (zh) 一种宽频带宽波束的圆极化微带天线
WO2024036856A1 (zh) 一种双极化高隔离度卡塞格伦天线
CN113644432B (zh) 一种双圆极化相控阵天线阵列
CN101257147A (zh) 蝶形空气微带天线
CN111987464B (zh) Ku/Ka波段双频锥形波束喇叭天线
CN112332115A (zh) 多模多功能通信导航共口径一体化天线
US3274603A (en) Wide angle horn feed closely spaced to main reflector
WO2019090927A1 (zh) 天线单元及天线阵列
US3133284A (en) Paraboloidal antenna with compensating elements to reduce back radiation into feed
WO2024051434A1 (zh) 一种圆极化天线、通信设备及圆极化天线制造方法
GB2236625A (en) Monopole antenna.
KR100815154B1 (ko) 도파관 구조를 가지는 위성통신 다중대역 안테나의 급전장치
US5903241A (en) Waveguide horn with restricted-length septums
US2556087A (en) Directive antenna system
Zou et al. High gain low sidelobe multibeam shaped lens antenna at 24 GHz for wind profile radar
CN113410658B (zh) 一种毫米波高增益栅格缝隙阵列天线

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22955623

Country of ref document: EP

Kind code of ref document: A1