同时，一般的微带天线的带宽比较窄，在1 ~ 5%。
And the standard microstrip antenna has a very narrow bandwidth of 1 ~ 5%.
为了展宽天线的带宽，采用双层圆形贴片电磁耦合天线。
A two layer electromagnetic coupled circular patch microstrip antenna is adopted to widen the frequency band of the antenna.
因此天线的带宽和Q 综值之间的关系在当时的确是个没有搞清楚的问题。
The common expression for bandwidth in terms of 1/Q is neither logical nor helpful in clear exposition.
另外地，开关可被用来“接入”和“断开”电容性元件，以便调节天线的带宽。
Additionally, switches may be used to 'switch in' and 'switch out' capacitive elements to adjust the bandwidth of the antenna.
理论分析表明：在相同的基片上，双偶极子型印制天线比普通微带振子天线的带宽宽得多；
The results indicate that bandwidth of the new antenna is larger than that of the normal microstrip dipole fabricated on the same substrate.
在本论文中，分析了波导缝隙天线的带宽与其组阵方式和馈电波导宽高比的变化规律，并且提出了用扼流槽扩展带宽的方案。
In this dissertation, the relationship between the bandwidth, the array scheme and feeding waveguide is studied. As a solution, choke grooves are used to expand the bandwidth.
文中从阵列天线的基本原理出发，介绍了相控阵天线的带宽特性，从阵列和阵元两个方面分析了改善相控阵带宽及扫描角的技术。
Based on the property of bandwidth, the technology for optimizing wideband through synthesis of antenna array and design of radiator is discussed.
如此装备一番，相距近十万米的两架碟形天线被恰当摆放后，便拥有足够的带宽以传送高质量的视频。
Thus equipped, two properly aligned dishes as much as 100km apart can transmit enough data to carry high quality video.
椭圆形平板天线有结构简单、频带宽、馈电相对简单等优点，可以满足小型化天线同时具有宽频带和高增益的要求。
The elliptical planar monopole antenna has the advantages of simple structure, wide band and relatively simple feed, so it can meet the demands of wide-band and high-gain at the same time.
为提高辐射效率和扩展工作带宽，对一种口径耦合馈电的多层介质高温超导微带天线进行了设计。
To increase the radiation efficiency and broaden the operation bandwidth, an aperture-coupled microstrip antenna of high temperature superconductor with multi-layer substrates is designed.
五边形天线合理利用了两个超宽强场区，使该天线不仅有高而平稳的场强而且能轻易达到二十倍频以上带宽。
By utilizing two field regions with stronger EM field intensity, the pentagon antenna has not only higher EM intensity, but also over twenty times frequency bandwidth.
结果表明，本文设计的加载环形微带天线具有带宽高、体积小等优点，适合在宽带无线电引信系统中使用。
The results of simulation and measurement indicate that the antenna designed in this paper has advantages of broadband and compact size, and it is suitable for broadband radio fuze system.
在一定轴比带宽条件下，优化后的十字振子天线正交方向上圆极化轴比可以达到1。
Under certain axis ratio bandwidth, the circular polarization axis ratio of the optimized cross dipole antenna can reach 1.
通过比较分析，得到了天线谐振频率、谐振点电压驻波比、带宽以及输入阻抗随不同几何参数的变化规律。
By comparative analysis, the dependence of the resonant frequency, voltage standing wave ratio, bandwidth and input resistance on different geometric parameters is obtained.
软件天线技术能够在不改变信号带宽的情况下提高通信系统的容量，是一种很有前景的下一代通信技术。
Software antenna technology can increase capacity of wireless communication system greatly without extra bandwidth. Thus, it is a next generation wireless technology with bright prospect.
选择正六边形分形缝隙结构，采用渐变的共面波导馈电，不仅拓宽了阻抗带宽，而且实现了天线的小型化。
The hexagon fractional slot structure is chosen, the gradually changed CPW feed is adopted. Not only the bandwidth of matched impedance is expanded, but also the antenna's miniaturization is realized.
平面单极性天线可用来提供很高的的阻抗带宽特性，应用于目前或将来的宽带系统中。
The planar monopole antenna provides extremely high width impedance characteristics which has been proposed for modern and future wideband wireless applications.
在自适应旁瓣相消技术中，天线的相消增益会随着信号带宽的增加而迅速下降。
Cancellation gain of antenna decreases rapidly with increasing of bandwidth of interference in adaptive side lobe cancellation.
深入分析了影响微带天线带宽的因素，研究了同轴探针馈电微带天线的同轴探针对微带天线带宽的影响。
The thesis deeply analyzes the factors which affect the bandwidth of microstrip antenna and studies the influence of coaxial probe which is .
平面螺旋天线虽然具有频带宽、体积小、主瓣宽、易封装等特点，但是在具体应用中常常不能适应实际的需要。
Although the planar spiral antenna has characteristics of wide bandwidth, small volume, wide main beam and easy to be mounted, it still can not meet the needs of practice usages.
相控阵雷达天线在进行宽带宽角扫描时，天线波束会“色散”，使得到的距离像展宽，从而降低了系统分辨率。
When phased array radar operates in wideband wide scan condition, the antenna beam is dispersed and thus the distance profile is broadened.
方形螺旋天线结构简单、频带范围宽，是一类性能优良的天线，但在变成定向辐射后其带宽会大大减小。
The square spiral antennas have many outstanding merits such that its structure is simple and its bandwidth is wide.
深入分析了影响微带天线带宽的因素，研究了同轴探针馈电微带天线的同轴探针对微带天线带宽的影响。
The thesis deeply analyzes the factors which affect the bandwidth of microstrip antenna and studies the influence of coaxial probe which is applied to feed to microstrip antenna.
主要介绍了几种新颖的大带宽微带贴片天线和天线阵。
Some novel microstrip antennas with large bandwidth are introduced principally.
在平面单极子天线的末端采用蛇形结构，并在适当的位置加载，将大大减小天线尺寸，扩展阻抗带宽。
Using snake structure at the end of the planar monopole and adding load at proper position can decrease the size greatly and broaden the impedance bandwidth.
该天线为小型电结构，其具有宽的带宽和好的增益特性，具有高效率且不易于失调。
The antenna is electrically small, has wide bandwidth and good gain characteristics, is efficient and not easily detuned.
它们都可以通过优化天线的几何尺寸来达到较大的带宽。
And most of these antennas can be worked out by optimizing their geometry parameters.
目前，天线的增益及带宽变化已成为衡量rcs减缩手段优劣的主要标准。
At present, the alteration of antenna's gain and bandwidth has been the main criterion which is used to weigh the means of RCS reduction.
这些方法分别采用单点馈电，多点馈电或多元组合实现圆极化，均有效拓展了圆极化天线的阻抗匹配带宽和圆极化轴比带宽。
In the methods, single feed, more feed and several patches consisting circular polarization are used to feed the antenna and improve the impendent or ar bands.
借助时域有限差分法（FDTD）对微带宽缝天线的频率和带宽特性进行了分析讨论。
Wide slot microstrip antenna is analyzed by means of finite-difference time-domain(FDTD) method.
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