Helical antenna has not only almost identical to the resistive input impedance in broad bandwidth, but also works by the end of super-gain front lobed map in the same frequency band.
螺旋天线不仅在宽频带上具有近乎一致的电阻性输入阻抗，而且在同样的频带上按超增益端射阵的波瓣图工作。
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.
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。
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.
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。
Cancellation gain of antenna decreases rapidly with increasing of bandwidth of interference in adaptive side lobe cancellation.
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。
Under certain axis ratio bandwidth, the circular polarization axis ratio of the optimized cross dipole antenna can reach 1.
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。
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.
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。
The narrow bandwidth property of a microstrip antenna is one of the important reasons to restrict its wide application.
微带天线的窄频特性是限制它广泛应用的原因之一。
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.
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 .
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。
Additionally, switches may be used to 'switch in' and 'switch out' capacitive elements to adjust the bandwidth of the antenna.
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。
The antennas can be made small-sized, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas.
天线能够制作成小型的，因为在有多个天线时，对单个天线来说相当窄的带宽就够了。
The air layer is arranged between the dielectric plates 1 and 2, adjusting the working bandwidth of the antenna through adjusting the thickness of the air layer and the size of the gap.
空气层在介质板1和2之间，通过调整空气层厚度和缝隙大小来调整天线工作带宽。
Based on the PIFA structure, a pattern reconfigurable antenna can be controlled by RF diode switch is designed, with bandwidth expanded at the same time.
首先以PIFA天线为基本结构，设计了能通过控制二极管开关状态来改变方向图的可重构天线，并实现了天线带宽的拓展。
The invention has the characteristics of wider working bandwidth and the high gain, which is suitable for the antenna application of the three frequency band RFID reader-writer.
本发明具有较宽工作带宽和高增益的特性，适合三频段RFID读写器天线应用。
The antenna was optimized in order to wide bandwidth and impedance matching.
为实现展宽频带、阻抗匹配等要求，对该移动终端天线进行了优化设计。
The antenna is electrically small, has wide bandwidth and good gain characteristics, is efficient and not easily detuned.
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。
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.
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。
In this paper, a low profile, L-band printed dipole element antenna with broad bandwidth is developed.
本文介绍一种低剖面的L波段宽带印刷振子天线单元。
We discuss the research of the microstrip antenna in the aspect of bandwidth enhancement in detail.
对微带贴片天线频带展宽方面的研究做了全面、深入的探讨。
The results indicate that bandwidth of the new antenna is larger than that of the normal microstrip dipole fabricated on the same substrate.
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；
A novel wide bandwidth and high gain microstrip antenna is presented.
本文提出了一种新型大带宽、高增益微带天线结构。
In foundation of the dual-layer structure, combining with capacitive coupled feed technology, the impedance bandwidth of the microstrip antenna has been further expanded;
在双层结构的基础上，结合电容耦合馈电技术，进一步扩展了微带天线的阻抗带宽；
This paper presents the theory limit on antennas' gain and bandwidth, as well as how to improve the bandwidth and miniaturize them, especially micro-strip antenna is elaborated.
本文讨论了天线带宽和增益的理论极限，以及如何提高天线带宽、实现小型化的各种方法，特别对微带贴片天线进行了介绍。
Results show that different EBG structures have different effects on the patch antenna. The performance such as gain, bandwidth and return loss of the conventiona…
结果表明基于基底打孔型方形孔EBG结构的贴片天线的性能最佳，其增益、带宽和输入回波损耗都得到了较大的改善。
The invention provides an antenna having a relatively wide bandwidth of operation.
本发明提供了一种微带天线，该微带天线具有相对宽的操作带宽。
The two-arm hemispherical helical antenna has very wide impedance and pattern bandwidth, and its gain in the whole band is larger and wave mildly, which show that it is of great applicat…
双臂半球面螺旋天线具有较宽的阻抗带宽和方向图带宽，工作频带内增益变化不大，该天线在军事卫星通信领域具有广阔的应用前景。
Introduced two synthesis approach which are commonly used in antenna design engineering, discussed the calculation of directional coefficient and the standing waves bandwidth.
介绍了地线工程设计中常用的两类综开方式；谈论了地线方背性解数的盘算和驻波带阔盘算。
The two-arm hemispherical helical antenna has very wide impedance and pattern bandwidth, and its gain in the whole band is larger and wave mildly, which show that…
双臂半球面螺旋天线具有较宽的阻抗带宽和方向图带宽，工作频带内增益变化不大，该天线在军事卫星通信领域具有广阔的应用前景。
The antennas can be made very small, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas.
天线的尺寸可以制造的很小。这是由于当有许多天线时，相对较小的频带宽度对于各个天线是足够的。
The antennas can be made very small, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas.
天线的尺寸可以制造的很小。这是由于当有许多天线时，相对较小的频带宽度对于各个天线是足够的。
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