用于电磁兼容试验的宽频带天线有很多类型，如双锥天线、对数周期天线、螺旋天线、喇叭天线等等。
There are all kinds of antennas used in EMC test such as biconical antennas, log periodic antenna, helical antenna, ridged horn antenna and etc.
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.
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。
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.
第一章前言中简要介绍了研究背景、智能天线的特点和常用的智能天线阵列形式，并提出了天线实现宽频带的方法。
The characteristics of smart antenna and the style of the arrays and the means to achieve wideband are discussed in research background.
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 was optimized in order to wide bandwidth and impedance matching.
本文主要叙述了平面等角螺旋天线的宽频带特性和工作原理，并简要介绍了它的设计方法。
This paper mainly describes the wideband property and operating concept of the antenna, and briefly introduce its design method.
移动通信的迅猛发展，对应用于无线通信系统的天线提出了小型化、宽频带、多频段工作等要求。
With the great development of wireless communication, there comes great demand of multi-frequency and broadband antennas of compact size.
摘要提出一种新型的单层介质宽频带圆柱共形微带天线。
A novel broadband cylindrically conformal microstrip antenna with a single substrate is presented.
本文讨论了一种新型全向宽频带超短波印刷天线。
A new printed UHF antenna with omnidirectional radiation and broad band is discussed in this paper.
因此，本文的重点在于研究并掌握宽频带微带天线技术，并将其应用于BGAN系统终端天线的设计。
Therefore, the key points of this article lie in the studies and grasps of the broadband technology of microstrip antennas, and applies them to the terminal antenna design of the BGAN system.
该天线可应用于宽频带单极化、双极化阵列天线单元或反射面天线馈源。
The antenna is applicable to the array antenna element with broadband single polarization and dual polarization or antenna feed source with reflecting surface.
本文用变分法并结合微扰理论分析了一种变形圆贴片宽频带微带天线的谐振频率。
In this paper, resonant frequency of the deformed circular microstrip antennas is investigated based on variational principle and the perturbation concept.
针对超高频机载合成孔径雷达天线小型化、高增益和宽频带的问题，分析了短背射天线缩小背腔的增益损失。
To meet the requirements of miniaturization, high gain and wideband of UHF antenna for aircraft SAR, the gain loss produced by narrowing back cavity of short back radiation antenna is analyzed.
该文提出了一种加天线罩来实现半波振子天线宽频带阻抗匹配的方法。
A method, covering the antenna with an antenna radome, is proposed in the paper to realize the broadband impedance matching of the half-wave dipole antenna.
本文主要对同轴探针馈电微带天线进行分析以及对宽频带微带天线进行研究。
This thesis mainly analyzes the coaxial probe-fed microstrip antenna and studies the broadband microstrip antenna.
因此，国内外专家学者对读写器天线的小型化、宽频带、高增益等技术做了广泛而深入的研究。
Therefore, the domestic and foreign scholars have done wide and deep researches on the miniaturization, broadband, high-gain and other technologies of the microstrip antennas.
实际制作并测试了上述两类天线，理论上的宽频带特性与陷波得到了实验结果的验证。
The proposed antennas are fabricated and measured. The theoretical broadband characteristics and notch-filter property are evidenced by the experimental results.
本文的研究结果表明，平面槽天线是一种比较适合宽频带工作的天线。
It is concluded from the results of this thesis that, planar slot antennas are fit for broadband working.
天线阵主要采用改进馈电网络的方法来展宽频带。
The method of improving the feed network is to broaden the bandwidth of the microstrip patch arrays principally.
四臂正弦天线是一种用途广泛的宽频带双极化天线。
As an important form of wide-band dual polarization antenna, the four-arm sinuous antenna has been widely used in EW equipments.
其中，介质谐振天线通过采用共面波导馈电来提高带宽，通过加载倒L形金属片来减小体积，从而实现了宽频带和小型化的目的；
The bandwidth of the DRA is increased by using coplanar-waveguide inductive slot, and the size of the DRA is reduced by loading a L metallic strip on the DR.
本文首先介绍了微带天线的理论分析方法和数值分析方法，并总结了微带天线小型化、多频段以及展宽频带的各种技术。
First, this article introduces some theoretical methods and numerical methods to analyze microstrip antenna and sum up some techniques for miniaturization, multi-frequency and broadening the band.
本发明提供一种适用于高频频带、宽频带的天线用铁氧体烧结体及磁性体天线。
To provide a ferrite sinter for an antenna suitable for use in a high frequency band and a broad band and to provide a magnetic material antenna.
具有圆极化和宽频带特点的宽带导航接收天线成为近年卫星接收天线研究的热点之一。
One of the focuses on the research of the satellite navigation receiver antenna is that of circular polarization and broadband.
最后，提出了一种新型宽频带双频差分天线。
At last, a novel broadband differential dual-frequency antenna is designed, simulated and measured.
用多端口网络理论分析该天线的阻抗特性，阐明该天线能够实现宽频带工作的原理。
The impedance characteristics of the cactus antenna are analyzed, and the principle of the cactus antenna working well over wide frequency band is explained.
由此，能够实现介电体装载天线的小型化，并且在该介电体装载天线中，可实现将VSWR的最大值抑制得较小的频率频带的宽频带化。
Thus, the size of the dielectric antenna can be reduced and the dielectric antenna can have a wide range of a frequency band suppressing the maximum value of the VSWR to a small value.
在频段比较高的情况下，天线小型化相对比较容易实现，但要做到宽频带却很难。
It's easy to make antenna smaller for working in high frequency, but rather hard to realize broadband.
本文对微带天线双频、圆极化、高增益、宽频带和宽波束技术作了一定的研究。
In this paper, technologies of dual-band, circular polarization, high gain, broadband and wide-beam have been studied.
本文对微带天线双频、圆极化、高增益、宽频带和宽波束技术作了一定的研究。
In this paper, technologies of dual-band, circular polarization, high gain, broadband and wide-beam have been studied.
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