摘要 :
Today's exploding demand for faster, more reliable, and ubiquitous radio systems in communication, instrumentation, radar, and sensors poses unprecedented challenges in microwave and millimeter-wave engineering. Recently, the pred...
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Today's exploding demand for faster, more reliable, and ubiquitous radio systems in communication, instrumentation, radar, and sensors poses unprecedented challenges in microwave and millimeter-wave engineering. Recently, the predominant trend has been to place an increasing emphasis on digital signal processing (DSP). However, while offering device compactness and processing flexibility, DSP suffers fundamental drawbacks, such as high-cost analog-digital conversion, high power consumption, and poor performance at high frequencies.
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摘要 :
The paper addresses the problem of the radiation efficiency of planar antennas on electrically thick substrates. First, the non-monotonic dependency of the radiation efficiency of an infinitesimal horizontal electric dipole on gro...
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The paper addresses the problem of the radiation efficiency of planar antennas on electrically thick substrates. First, the non-monotonic dependency of the radiation efficiency of an infinitesimal horizontal electric dipole on grounded and ungrounded substrates versus the substrate electrical thickness is analyzed. Next, the phenomenology of the observed radiation efficiency is explained with the help of a novel substrate dipole approach, which reduces the actual structure to an equivalent source dipole composed of the original dipole and the substrate dipole radiating into free space. Finally, two solutions for enhancing the efficiency at electrical thicknesses where the efficiency is minimal are studied.
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摘要 :
In the above titled paper (ibid., vol. 60, no. 12, pp. 5753-5767, Dec. 2012), the implementation of the retrieval algorithm introduced in [2], [3] (therein numbered as [18, [22]) was incorrect. The corrected results are presented here.
