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학술지 Compact Log-periodic Dipole Array Antenna with Bandwidth-enhancement Techniques for the Low Frequency Band
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저자
Anim Kyei, 심동욱, 정영배
발행일
201704
출처
IET Microwaves, Antennas and Propagation, v.11 no.5, pp.711-717
ISSN
1751-8725
출판사
IET
DOI
https://dx.doi.org/10.1049/iet-map.2016.0611
협약과제
16MR3300, 전자파잔향실 기반 실환경 전파 측정 및 평가 기술 연구, 권종화
초록
A compact planar log-periodic dipole array (LPDA) antenna operating from 0.55 to 9 GHz with high measured gain is proposed to be implemented in a reverberation chamber as a source antenna. To minimise the total size of the LPDA antenna, variants of top-loading techniques are utilised, and a much smaller spacing factor is opted to specify the spacing between the elements. However, miniaturisation of the LPDA antenna limits the antenna's wideband characteristics over the desired range of frequencies. Hence, a feedline meander and a trapezoidal stub are incorporated into the design as impedance matching techniques to effectively enhance the bandwidth performance especially for the lower band of the antenna's operating frequency range. The LPDA antenna exhibits radiation patterns with and without a radome having the measured gain ranging from 2.48 to 7.89 dBi and from -1.20 to 7.94 dBi, respectively.
KSP 제안 키워드
Enhancement techniques, Matching techniques, Radiation Pattern, frequency band, impedance matching, log-periodic dipole array (LPDA) antenna, log-periodic dipole array antenna, low-frequency, operating frequency range, reverberation chamber, spacing factor