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。
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。
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。
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。
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。
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；
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。
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。
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。
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；
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。
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。
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 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。
Based on the property of bandwidth, the technology for optimizing wideband through synthesis of antenna array and design of radiator is discussed.
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。
The frequency characteristic of the admittance of radiating slot and the waveguide wavelength of radiating waveguide is the main factor that influences the bandwidth of the slot array antenna.
辐射缝隙导纳及波导导内波长的频率特性，是影响裂缝天线带宽的主要因素。
Therefore, a single compact antenna that has an impedance bandwidth wide enough to cover the operating frequency bands of the multi-band wireless communication system is more desirable.
对于这种无线多频通信系统来说，具有紧凑结构并能覆盖这些通信频段的带宽的天线是人们所希望的。
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。
Narrow bandwidth has been one of the most serious limitations hindering the wider application of microstrip antenna technology.
频带窄严重制约微带天线的广泛应用。
It is promised that the lobe pattern and impedance of a antenna are kept common in a wider frequency field (as bandwidth is 10 or more).
通常希望一个天线的波瓣图和阻抗能在一个较宽的频率范围内(例如频带宽度为10或更高)保持不变。
It is promised that the lobe pattern and impedance of a antenna are kept common in a wider frequency field (as bandwidth is 10 or more).
通常希望一个天线的波瓣图和阻抗能在一个较宽的频率范围内(例如频带宽度为10或更高)保持不变。
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