| Wideband Radiation Null Steering Using the Odd / Even Modes ofMicrostrip Patch Antenna |
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| Fund Project:国家自然科学基金(62071037) |
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| Abstract:A broadband patch antenna with two radiation modes is designed. The antenna consists of a rectangular
patch and a CPW feeding structure, which can work in the even mode or odd mode, and the corresponding radiation pattern
is broadside or horizontal omnidirectional. The two radiation modes can be excited by a single feed network with a size of only
35 mm×14. 5 mm. The microstrip-line-slot structure and CPW structure in the feed network can generate in-phase and out-ofphase
electric field respectively, which can separately excite the even and odd modes of the patch to achieve wide bandwidth
and high isolation. The test results show that the operating frequency band of the antenna is 2. 17-2. 95 GHz and the working
bandwidth is 780 MHz (31%). Based on the two radiation modes, the antenna can generate signal null at a specific angle to
reject malicious interference, and the null angle changes linearly with operating frequency. The antenna can be used for intelligent
communication systems such as MIMO communication. |
| keywords:broadband patch, even mode and odd mode, co-planar waveguide feed, pattern diversity, null steering |
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