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Title: Log-periodic monopole array with uniform spacing and uniform height
Authors: Song, Qinghua
Shen, Zhongxiang
Lu, Jian
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Song, Q., Shen, Z., & Lu, J. (2018). Log-periodic monopole array with uniform spacing and uniform height. IEEE Transactions on Antennas and Propagation, 66(9), 4687-4694. doi:10.1109/TAP.2018.2846797
Journal: IEEE Transactions on Antennas and Propagation
Abstract: This paper presents a log-periodic monopole array (LPMA) with uniform spacing and uniform height operating in a wideband of 2-6 GHz. Different from the conventional LPMA with logarithmic spacing and height, the proposed antenna with uniform spacing and uniform height simplifies the design procedure and retains a low profile. The top-hat monopoles and folded top-hat monopoles are used to reduce the height of the antenna. A maximum bandwidth of 3:1 is theoretically proposed by considering the maximum and minimum spacing factor of the array. A meandering microstrip line is employed as the feeding line. The compensation of the length of the feeding line is proposed for the uniformly spaced LPMA compared to the conventional array. A prototype is fabricated and tested. Measured results indicate that an impedance bandwidth from 2 to 6 GHz (3:1) with VSWR < 2 is achieved. The measured peak realized gain is in the range of 6.6-8.7 dBi, which has great potential in many communication systems such as missile and airborne applications.
ISSN: 0018-926X
DOI: 10.1109/TAP.2018.2846797
Rights: © 2018 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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