Frequency reconfigurable antenna
A technology for reconfiguring antennas and frequencies, applied in the field of frequency reconfigurable antennas, can solve the problems of high design cost, simple volume and overall structure, and a large number of PIN diodes, and achieve low cost, small size, and simple overall structure.
Inactive Publication Date: 2016-01-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0005] In order to overcome the problems in the above designs, such as the large number of PIN diodes used, complex antenna structure, feeding and bias circuit design, and high design cost, the present invention proposes a frequency reconfigurable antenna, which only needs to use one PIN diode, The purpose of using microstrip line input signal, small size and simple overall structure
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[0022] exist figure 1 Among them, the loading diode adopts the PIN diode "DSG9500-000" of Skyworks company, and the simulation model is as follows Figure 6 shown. By adjusting R in the figure p Resistance, to simulate the "on" and "off" of the PIN diode. In this simulation, 1000Ω and 4Ω are used to simulate the "off" and "on" of the diode respectively. The diode model is connected in series with a transmission line, and the simulation results are as follows: Figure 7 shown. It can be seen from the figure that the model can correctly simulate the state of the PIN diode. During the optimization simulation stage, the return loss results of the antenna are obtained by the following steps. First, simulate the passive part of the antenna with Ansys' "AnsoftHFSS" (HFSS) software, extract the S-parameter model, and then import it into Agilent's "Advanced Design System" (ADS), and perform joint simulation with the previous PIN diode model. Finally got the result. In this way,...
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The invention discloses a frequency reconfigurable antenna, including a dielectric substrate, a metal backboard, a metal feed line, a short branch line, a first radiation branch, a second radiation branch, a PIN diode, a grounding via hole and a high-resistance bias line. The metal backboard is positioned on the back surface of a lower part of the dielectric substrate. The metal feed line is positioned on the front surface of the lower part of the dielectric substrate, and the metal feed line is higher than the metal backboard. The short branch line is positioned on the front surface of an upper part of the dielectric substrate, one end of the short branch line is connected with the metal feed line, the other end of the short branch line is divided into the first radiation branch and the second radiation branch, and the second radiation branch is longer than the first radiation branch. A tail end of the first radiation branch is connected with the PIN diode. A tail end of the PIN diode is connected with one end of the high-resistance bias line positioned on the back surface of the upper part of the dielectric substrate through the grounding via hole, and the other end of the high-resistance bias line is connected with the metal back board. The antenna is advantaged by being low in cost and small in size, and achieving omnidirectional radiation at different working frequency points.
Description
technical field [0001] The invention relates to an antenna, in particular to a frequency reconfigurable antenna applied in the field of wireless communication. Background technique [0002] With the rapid development of modern wireless technology, multi-functional multi-mode antennas with reconfigurable characteristics have become a major research hotspot in the wireless field. Through this study, many characteristics of the antenna, such as operating frequency, radiation pattern and polarization, can be dynamically changed through external control. [0003] Among them, the frequency reconfigurable characteristics of the antenna include different modes such as continuous adjustable frequency points, changes in working bandwidth, and switching between different frequency points. In cognitive radio, military communications, electronic countermeasures and other fields, in order to avoid interference signals at different frequencies, it is often necessary to switch between diff...
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IPC IPC(8): H01Q1/50H01Q5/328H01Q5/371
Inventor 郭映江唐小宏李文迅蒋远灿叶晶晶田川蔡宗棋罗鸣闫腾飞卢頔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA