设计一种新型串行馈电的双频段八臂缝隙螺旋天线。
A novel dual-band 8-arm spiral slot antenna with serial feed is designed.
研究了含平面等角螺旋天线阵列吸波复合材料的微波吸收特性。
Microwave absorbing properties of the composites containing the planar equiangular spiral antenna arrays were investigated.
本文采用法向模螺旋天线代替以前采用的短偶极子天线以提高效率。
This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.
最后，本文对轴向模螺旋天线和双脊喇叭天线的辐射场进行了分析。
At last, the radiated field of axial-mode helical antenna and double ridged horn antenna is analyzed at this paper.
螺旋天线满足人们追求外置天线小型化的要求，近年来得到迅速普及。
Helical antenna satisfies the demand for the stubby antenna miniaturization. It has a rapid development in recent years.
我们将这一类天线称为非频变天线。平面等角螺旋天线是这一类天线的典型例子。
This kind of antenna is called non frequency transforming antenna, a typical instance is plane isogonal corkscrew antenna.
对用负阻抗变换电路同圆锥螺旋天线相结合，构成的有源接收天线进行了理论分析。
An active receiving antenna consisting of conical helix antenna and a negative impedance changing circuit is analyzed in this paper.
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.
将上升沿和下降沿均不同的时域脉冲波形馈入到轴向模式螺旋天线中，得到不同的辐射场情况。
Several different time domain waves with different ascending time and degressive time are fed into axial-mode helical antennas, and different radiated fields are gained.
论文的第二个研究工作是以超宽带圆极化平面天线为研究背景，设计了一个双模四臂平面螺旋天线。
The second research of the thesis is to design a double-patterns four-arm plane spiral antenna with the background of wideband circular polarization plane antenna's technology.
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.
一种是采用两个高次模天线分别实现中频和高频性能要求，而采用简单的四臂螺旋天线实现低频要求。
One is composed of two high-order mode microstrip antennas and a simple four-arm spiral antenna, which could satisfy with different radiation demands of transmitter and receiver.
并以平面阿基米德螺旋天线为例，计算了天线上的电流分布和辐射特性，验证了天线的频率无关特性。
With the plane Archimedean spiral antenna a calculation of the current on the antenna as well as its radiation is carried out and its frequency independence was verified.
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.
分别采用螺旋天线和V形平板天线作为单元天线，以二阶六边形为阵列进行综合仿真，得到了比较低的旁瓣。
With the helical antenna and a V-shaped plate antenna as a unit antenna and the second-order hexagon as the array, the antennas are integrated and simulated and get the low side-lobe characteristics.
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.
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.
将平面等角螺旋天线投影到半球面和部分球面上，得到半球面螺旋天线和部分球面螺旋天线两种新型球面螺旋天线。
Two novel spherical helical antennas are designed by projecting the planar equiangular spiral antenna onto the surfaces of hemisphere and partial sphere.
采用螺旋基函数和检验函数的矩量法分析了单臂半球面螺旋天线和双臂半球面螺旋天线的驻波、增益及方向图等特性。
The wideband characteristics of two hemispherical helical antennas are analyzed by the method of moment with curved basic and testing function.
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 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 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…
通过使用在二条里发现的特别旋转天线收集信息，二条形成螺旋状用它的四个阶梯固定在每条横断面上。
Information is collected through the use of special rotating antennae found on the two strands that form the helix and located where each strand intersects with its four ladders.
还有一些其他的GPS天线技术(芯片，螺旋)，但它们并不常见，有点贵，需要大大增加放大和过滤。
There are some other GPS antenna technologies (chip, helical), but they are not as common, a bit more expensive, and require significantly more amplification and filtering.
实验结果和多例临床应用证明：螺旋型天线稳定、高效、安全，在临床上用有着广泛的应用前景，建议螺旋型天线代替单极子天线作为研究方向。
Experiment results and many clinical examples suggest that the helical microwave antenna is a dependable, stable, safe and efficient one, and has a wide applicant future in clinical practice.
在LTCC蓝牙天线的设计中，提出一种类似于立体螺旋结构的斜体立体式馈电系统。
A novel feeding system of Tilt-shaped strip line which is very similar to three-dimensional helical structure is proposed to design LTCC Bluetooth antenna.
采用小尺寸低功耗的射频芯片结合实际环境设计出螺旋结构天线，选择合适的频率，天线在轴向方向得到最大的辐射能量。
A helix antenna was presented together with low power RF amplifier, as the frequency fitted, the axial direction can obtain largest radio energy.
平面螺旋宽带天线具有频带较宽、体积较小、圆极化性能较好等特点，应用范围很广。
Planar Archimedean antenna has some advantages as wideband, small volume and good performance in circularly polarizing, so it has broad appliance prosperity.
平面螺旋宽带天线具有频带较宽、体积较小、圆极化性能较好等特点，应用范围很广。
Planar Archimedean antenna has some advantages as wideband, small volume and good performance in circularly polarizing, so it has broad appliance prosperity.
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