Design of High-Gain and Small-Aperture Endfire Antenna using a Phase-Reversal Technique

IEEE Transactions on Antennas and Propagation(2020)

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摘要
A phase-reversal technique is proposed in this article to overcome the gain-aperture tradeoff of endfire antennas. Such a tradeoff fundamentally forbids simultaneous high gain and small cross-section aperture. The phase-reversal technique breaks this tradeoff and hence allows one to design a high-gain endfire antenna with a small cross-section aperture. To illustrate the proposed phase-reversal technique, a crossover stripline structure is implemented. The antenna radiates into the endfire direction within 9.5–10.5 GHz and it achieves 13 dBi endfire radiation gain with only $0.047\lambda _{0}\,\,\times \,\,0.022\lambda _{0}$ cross-section aperture size. These results successfully validate the proposed phase-reversal technique. Such a high-gain and small-aperture endfire antenna is potentially useful for microwave imaging in lossy medium.
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关键词
Power transmission lines,Aperture antennas,Stripline,Microwave antennas,Imaging
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