期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 70, 期 7, 页码 5935-5940出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3161324
关键词
Baluns; Impedance; Couplings; Apertures; Microstrip; Equivalent circuits; Dipole antennas; Folded dipole (FD); microstrip balun; variable impedance; wideband
资金
- National Natural Science Foundation of China [61671333]
- Natural Science Foundation of Hubei Province [2014CFA093]
- Fundamental Research Funds for the Central Universities [2042019K50264, 2042019gf0013, 2042020gf0003]
- Fundamental Research Funds for the Wuhan Maritime Communication Research Institute [2017J-13, KCJJ2019-05]
This communication proposes a wideband balun with adjustable impedance for dipoles with different impedances. The balun achieves balanced-unbalanced conversion through aperture coupling and has the capability of impedance conversion. Experimental results demonstrate the versatility of the balun.
Aiming at dipoles with different impedances, a wideband balun with adjustable impedance for the balanced port is proposed in this communication. The balun is directly connected to the dipole to form an antenna element, so it also needs to meet: no connection line is required; the overall size is less than a quarter of the wavelength. The proposed balun realizes balanced-unbalanced conversion through aperture coupling, and dual slot ensures its wide-band characteristics. Due to the high-impedance characteristics of the folded dipole (FD), the balun has achieved impedance conversion ratios of 6:1, 8:1, 10:1, and 12:1, and the corresponding bandwidths are 82.1%, 67.1%, 53.7%, and 44.4%, respectively. Finally, three types of wideband dipoles with different characteristic impedances are fabricated to verify the versatility of the balun.
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