卡塞格伦天线
卡塞格伦天线是从光学望远镜的原理发展而来的。双反射面天线增加了有效的焦距长度,卡塞格伦天线采用双曲面作为副反射面, 副反射面的一个焦点在主反射面的角度上,而另一个焦点则处于馈源的相位中心
特点:1) 典型带宽:5%
2) 极化:线极化
3) 副瓣:-15dB
4) 增益:30-50dB(典型)
测试报告
特点:1) 典型带宽:5%
2) 极化:线极化
3) 副瓣:-15dB
4) 增益:30-50dB(典型)
卡塞格伦天线
卡塞格伦天线有如下优点,特别适用于地面卫星终端。
1) 缩短了馈线的长度;
2) 相对于前馈抛物面尺寸上更灵巧;
3) 通过调整副镜能更加方便的控制信号幅度和相位;
卡塞格伦天线同时也有以下缺陷:
1) 较大的副镜遮挡;
2) 副瓣较高;
3) 结构复杂。
西宝公司的卡塞天线可以实现频率高达 236GHz 的设计,除标准设计以外还可以根据客户需求量身定制产品。
卡塞格伦天线的型号及参数(Cassegrain Antenna-Models and speifications)
型号Model | 频率范围Freq. GHz | 工作带宽Band width(%) | 增益Gain (dB) | 驻波VSWR | 3dB 波束宽度 | 第一副瓣≤(dB) Typ. | 外形尺寸Size (mm) |
抛物面直径: Ø=200mm | |||||||
XB-CA42-200 | 18.0-26.5 | 5-15 | 28 | 1.5 | 5.9° | -18 | ø210×100 |
XB-CA34-200 | 21.7-33.0 | 5-15 | 31 | 1.5 | 4.1° | -18 | ø210×100 |
XB-CA28-200 | 26.5-40.0 | 5-15 | 32 | 1.5 | 3.6° | -18 | ø210×100 |
XB-CA22-200 | 33.0-50.0 | 5-15 | 33 | 1.5 | 3.1° | -18 | ø210×100 |
XB-CA19-200 | 39.2-59.6 | 5-15 | 35 | 1.5 | 2.3° | -18 | ø210×100 |
XB-CA15-200 | 49.8-75.8 | 5-15 | 37 | 1.5 | 1.9° | -18 | ø210×100 |
XB-CA12-200 | 60.5-91.9 | 5-15 | 39 | 1.5 | 1.6° | -18 | ø210×100 |
XB-CA10-200 | 75.8-112.0 | 5-15 | 41 | 1.5 | 1.3° | -18 | ø210×100 |
XB-CA4-220 | 203.5-236.5 | 5-15 | 50 | 1.5 | 0.4° | -15 | ø220×120 |
抛物面直径:Ø=300mm | |||||||
XB-CA62-300 | 11.9-18.0 | 5-15 | 29 | 1.5 | 5.5° | -18 | ø310×150 |
XB-CA51-300 | 14.5-22.0 | 5-15 | 31 | 1.5 | 4.1° | -18 | ø310×150 |
XB-CA42-300 | 18.0-26.5 | 5-15 | 32 | 1.5 | 3.6° | -18 | ø310×140 |
XB-CA34-300 | 21.7-33.0 | 5-15 | 34 | 1.5 | 2.6° | -18 | ø310×140 |
XB-CA28-300 | 26.5-40.0 | 5-15 | 35 | 1.5 | 2.3° | -18 | ø310×140 |
XB-CA22-300 | 33.0-50.0 | 5-15 | 37 | 1.5 | 1.9° | -18 | ø310×140 |
XB-CA19-300 | 39.2-59.6 | 5-15 | 40 | 1.5 | 1.5° | -18 | ø310×140 |
XB-CA15-300 | 49.8-75.8 | 5-15 | 41 | 1.5 | 1.3° | -18 | ø310×140 |
XB-CA12-300 | 60.5-91.9 | 5-15 | 42 | 1.5 | 1.1° | -18 | ø310×140 |
XB-CA10-300 | 75.2-112.0 | 5-15 | 43 | 1.5 | 1.0° | -18 | ø310×140 |
抛物面直径:Ø=500mm | |||||||
XB-CA112-500 | 6.57-9.99 | 5-15 | 28 | 1.5 | 5.9° | -18 | ø530×200 |
XB-CA90-500 | 8.2-12.5 | 5-15 | 30 | 1.5 | 4.7° | -18 | ø530×200 |
XB-CA75-500 | 9.84-15.0 | 5-15 | 32 | 1.5 | 3.6° | -18 | ø530×200 |
XB-CA62-500 | 11.9-18.0 | 5-15 | 33 | 1.5 | 3.1° | -18 | ø530×200 |
XB-CA51-500 | 14.5-22.0 | 5-15 | 35 | 1.5 | 2.3° | -18 | ø530×200 |
XB-CA42-500 | 18.0-26.5 | 5-15 | 37 | 1.5 | 1.9° | -18 | ø530×190 |
XB-CA34-500 | 21.7-33.0 | 5-15 | 38 | 1.5 | 1.7° | -18 | ø530×190 |
XB-CA28-500 | 26.5-40.0 | 5-15 | 40 | 1.5 | 1.5° | -18 | ø530×190 |
XB-CA22-500 | 33.0-50.0 | 5-15 | 42 | 1.5 | 1.1° | -18 | ø530×190 |
XB-CA19-500 | 39.2-59.6 | 5-15 | 44 | 1.5 | 0.9° | -18 | ø530×190 |
抛物面直径:Ø=800mm | |||||||
XB-CA187-800 | 3.94-5.99 | 5-15 | 28 | 1.5 | 5.9° | -18 | ø840×300 |
XB-CA159-800 | 4.64-7.05 | 5-15 | 29 | 1.5 | 5.5° | -18 | ø840×300 |
XB-CA137-800 | 5.38-8.17 | 5-15 | 31 | 1.5 | 4.1° | -18 | ø840×300 |
XB-CA112-800 | 6.57-9.99 | 5-15 | 32 | 1.5 | 3.6° | -18 | ø840×300 |
XB-CA90-800 | 8.2-12.5 | 5-15 | 34 | 1.5 | 2.6° | -18 | ø840×300 |
XB-CA75-800 | 9.84-15.0 | 5-15 | 36 | 1.5 | 2.1° | -18 | ø840×300 |
XB-CA62-800 | 11.9-18.0 | 5-15 | 37 | 1.5 | 1.9° | -18 | ø840×300 |
XB-CA51-800 | 14.5-22.0 | 5-15 | 39 | 1.5 | 1.6° | -18 | ø840×300 |
XB-CA42-800 | 18.0-26.5 | 5-15 | 41 | 1.5 | 1.3° | -18 | ø840×290 |
XB-CA34-800 | 21.7-33.0 | 5-15 | 42 | 1.5 | 1.1° | -18 | ø840×290 |
XB-CA28-800 | 26.5-40.0 | 5-15 | 43 | 1.5 | 1.0° | -18 | ø840×290 |
抛物面直径:Ø=1000mm | |||||||
XB-CA229-1000 | 3.22-4.90 | 5-15 | 28 | 1.5 | 5.9° | -18 | ø1040×420 |
XB-CA187-1000 | 3.94-5.99 | 5-15 | 30 | 1.5 | 4.7° | -18 | ø1040×420 |
XB-CA159-1000 | 4.64-7.05 | 5-15 | 32 | 1.5 | 3.6° | -18 | ø1040×420 |
XB-CA137-1000 | 5.38-8.17 | 5-15 | 33 | 1.5 | 3.1° | -18 | ø1040×420 |
XB-CA112-1000 | 6.57-9.99 | 5-15 | 35 | 1.5 | 2.3° | -18 | ø1040×420 |
XB-CA90-1000 | 8.2-12.5 | 5-15 | 36 | 1.5 | 2.1° | -18 | ø1040×420 |
XB-CA75-1000 | 9.84-15.0 | 5-15 | 37 | 1.5 | 1.9° | -18 | ø1040×420 |
XB-CA62-1000 | 11.9-18.0 | 5-15 | 39 | 1.5 | 1.6° | -18 | ø1040×420 |
XB-CA51-1000 | 14.5-22.0 | 5-15 | 41 | 1.5 | 1.3° | -18 | ø1040×420 |