共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
5.
6.
本文基于等效网络分析法,导出了加载共轴细线天线方向系数的理论计算公式,构造了天线最大增益的优化目标函数,并给出了其快速优化计算方法。据此设计了一个工程实例,实测结果表明,其性能优于设计指标,因此,本文所述优化设计方法可应用于工程设计中。 相似文献
7.
8.
“十大天线技术进展”旨在遴选、记录天线领域的年度标志性成果。在广泛征集中国天线产学研界多位专家的意见后,整理出了2022年度十大天线技术进展,其中有九大天线技术来自中国。分别介绍了这些天线技术的技术特点和优势。认为在天线开发应用方面,中国后来居上。指出天线强则国家强,国家强则天线强。 相似文献
9.
10.
11.
12.
双极化微带线阵的交叉极化抑制 总被引:2,自引:0,他引:2
对双极化微带线阵交叉极化的抑制作了理论与实验研究。首先基于奇偶模对称原理,在理论上分析了二元阵倒相馈电技术,然后给出四种不同馈电结构的四元线阵设计,对此进行了分析、比较,获得一种性能比较理想的线阵并作了实测,理论与实测结果很吻合。实测结果表明:该四元线阵的交叉极化电平低于-27dB,两极化端口之间的隔离度在8. 74~9. 5GHz带宽上均大于34dB。 相似文献
13.
本文针对线天线及天线阵的频域分析方法的缺点,首次将时域传输线矩阵法应用到这一领域,应用时域TLM法时,只需经过一次运逄就可以得到天线及天线阵各个区域的场特性,本文计算方法及数值结果表明,运用时域TLM法可以对各种大型天线阵进行有效的分析,便于工程应用。 相似文献
14.
15.
本文综述了迅速发展中的微带天线理论和技术的新进展。侧重评述了基本理论和圆极化、宽频带、多频段及馈电等技术的进展,并介绍了毫米波微带天线阵和有源固态相控阵等新型微带阵列。最后展望了发展方向。 相似文献
16.
宽带微带贴片天线的研究进展 总被引:6,自引:5,他引:6
文章论述了微带贴片天线频带展宽方面的研究进展,主要介绍了几种新型的大带宽微带贴片天线。这些天线采用了在贴片或接地板“开窗”,附加负载,增加片元等方法来改进微带贴片天线的窄频特性,同时使其向小型化,结构简单化方向发展,使微带贴片天线的应用范围得到进一步的扩大。 相似文献
17.
Qasim Umar Khan Mojeeb Bin Ihsan 《AEUE-International Journal of Electronics and Communications》2014,68(11):1073-1077
Higher order mode excitation in the microstrip patch has been achieved to alleviate the low gain problem associated with this particular class of antennas. This higher order mode excitation is achieved by geometric modification of the radiating patch. The designed antenna structure is simple in nature, provides easy fabrication and manufacturing while exhibiting high gain characteristic. The proposed antenna has a measured gain of 10.21 dBi at the operating frequency of 16 GHz. The half power beam width is approximately 36° and 34° in the H- and E- planes respectively. The antenna can be used in the different applications related to the Ku band. 相似文献
18.
该文介绍了一种性能优良的四元U型缝贴片天线阵。该阵面由一新型的宽带匹配网络馈电,能量通过地板上的馈电缝耦合到上面的U型缝贴片上。这种类型的天线阵可以在10.4-16.7GHz的频率内工作,阻抗带宽达46.5%,最大增益为15dBi,增益在13dBi以上的频率范围达30%,交叉极化电平在整个频带内均小于-18dB。 相似文献
19.
20.
《AEUE-International Journal of Electronics and Communications》2014,68(8):710-716
Various gap-coupled array configurations of ring microstrip antennas and rectangular slot cut ring microstrip antennas with proximity fed slot cut ring microstrip antenna for larger bandwidth and gain are proposed. The rectangular slot in ring patch reduces its orthogonal TM01 and TM02 mode resonance frequencies and along with TM10 modes of fed and parasitic ring patches, yields broadband response. The gap-coupled configuration with ring patch and slot cut ring patch yields bandwidth of nearly 430 MHz with broadside radiation pattern and peak gain of more than 9 dBi. By gap-coupling ring patches along all the edges of proximity fed pair of slot cut ring patch, a 3 × 3 ring microstrip antenna array is realized. It yields bandwidth of more than 460 MHz with peak gain of more than 10 dBi. To further improve upon the bandwidth, a 3 × 3 array of ring patches in which rectangular slot is first cut on the edges of ring patch which are gap-coupled along x-axis and further cut inside the patches which are gap-coupled along x and diagonal axes, is proposed. Both of these configurations yield bandwidth of more than 500 MHz (>45%) with a peak gain of around 10 dBi. 相似文献