超宽带带阻天线以及平面多通带天线的研究

发布时间：2019-02-12 11:53

【摘要】：近年来,科技的进步和通信技术的发展对无线通信设备提出了更高的要求。天线作为通信系统的主要组成部分,得到了广泛的关注。为了满足移动通信设备便携式需求,天线逐渐向小型化、宽频带、多频带的方向发展,平面印刷板天线由于其具有成本低、制作简单、重量轻、设计灵活等优势,非常适合在现代通信设备中使用。本文首先设计了一款超宽带三阻带天线。利用边缘渐变的辐射面和地板实现了超宽带天线3.1-10.6 GHz的工作频段。通过辐射面上的半圆形半波长开槽在3.3-3.6 GHz(WIMAX)形成阻带,在馈电线两侧分别引入半波长半圆谐振结构,在5.15-5.35 GHz和5.72-5.83 GHz(WLAN)实现阻带功能。天线在工作频段内,具有全向的H面方向图,增益起伏约2 dB,传输函数比较平坦,群时延不大于1 ns,探针距天线600 mm时探测到的H面的保真系数大于0.88,具有很好的时域特性。天线经过加工测试,测试与仿真结果吻合较好。创新设计了两款三通带天线。第一款多通带天线尺寸为20×25.5×0.8 mm3,利用不同短枝节产生不同的电流路径,实现了300 MHz(2.2-2.5 GHz)、400 MHz(3.3-3.7 GHz)以及800 MHz(5.1-5.9 GHz)三个通带,天线的每个通带都可以通过调整枝节的尺寸独立控制,具有较强的实用价值。另一款多通带天线采用了共面波导馈电,在天线正面引入倒U形槽,背面引入方形裂口环,这两个结构同时起到了产生阻带和调频的作用。实现了220 MHz(2.33-2.55 GHz)、880 MHz(3.0-3.88GHz)和750 MHz(5.15-5.9 GHz)三个通带。两款通带天线都覆盖了2.4 2.484 GHz和5.15 5.825 GHz(WLAN)和3.3-3.6 GHz(WIMAX)两个系统。利用CST及HFSS仿真软件对两款多通带天线进行优化,并将天线进行加工测试,测试与仿真结果相符。
[Abstract]:In recent years, the progress of science and technology and the development of communication technology put forward higher requirements for wireless communication equipment. As the main part of communication system, antenna has been paid more and more attention. In order to meet the portable demand of mobile communication equipment, the antenna is gradually developing towards the direction of miniaturization, broadband and multi-band. Because of its advantages of low cost, simple fabrication, light weight, flexible design, and so on, the planar printed board antenna has the advantages of low cost, simple fabrication, light weight, flexible design, etc. Very suitable for use in modern communication equipment. In this paper, we first design a three-stop-band UWB antenna. The operating frequency band of UWB antenna 3.1-10.6 GHz is realized by using edge gradient radiation surface and floor. Through the semicircular half-wavelength grooving on the radiation surface, the stopband is formed at 3.3-3.6 GHz (WIMAX), and the half-wavelength semicircular resonant structure is introduced on both sides of the feed line, respectively. The stopband function is realized at 5.15-5.35 GHz and 5.72-5.83 GHz (WLAN). In the operating frequency band, the antenna has a omnidirectional H-plane pattern, and the gain fluctuation of about 2 dB, transmission function is relatively flat. The fidelity coefficient of the H plane detected when the group delay is not more than 1 ns, probe is more than 0.88 when the probe is less than 600 mm from the antenna. It has good time domain characteristics. The antenna has been processed and tested, and the test results are in good agreement with the simulation results. Innovative design of two three-way antenna. The size of the first multiband antenna is 20 脳 25.5 脳 0. 8 mm3, which uses different short branches to produce different current paths, and achieves 300 MHz (2.2-2.5 GHz),). Four hundred MHz (3.3-3.7 GHz) and eight hundred MHz (5.1-5.9 GHz) passbands, each of which can be independently controlled by adjusting the size of the branches, is of great practical value. The other multi-band antenna is fed by coplanar waveguide. The inverted U-shaped slot is introduced in the front of the antenna and the square crack ring is introduced on the back. These two structures play a role of both stopband and frequency modulation. Three passbands of 220 MHz (2.33-2.55 GHz), 880 MHz (3.0-3.88GHz) and 750 MHz (5.15-5.9 GHz) are realized. Both passband antennas cover 2. 4 GHz, 5. 15 5.825 GHz (WLAN) and 3. 3. 6 GHz (WIMAX) systems. CST and HFSS simulation software are used to optimize the two multi-pass antennas, and the antenna processing tests are carried out, and the results are in agreement with the simulation results.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820

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