a device for coupling two electrical circuit elements, such as an aerial and its feeder cable, where one is balanced and the other is unbalanced
Word origin
C20: shortened from bal(anced to) un(balanced transformer)
balun in American English
(ˈbælən)
noun
Electronics
a device for converting a balanced line into an unbalanced line and vice versa
Word origin
[bal(ance) + un(balance)]
Examples of 'balun' in a sentence
balun
For that, a new device with both filter-type and balun-type characteristics was investigated and fabricated.
Chia-Mao Chen, Shoou-Jinn Chang, Yen-Liang Pan, Cheng-Yi Chen, Cheng-Fu Yang 2014, 'Fabrication of Compact Microstrip Line-Based Balun-Bandpass Filter with High Common-ModeSuppression', Mathematical Problems in Engineeringhttp://dx.doi.org/10.1155/2014/985064. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Prototypes of proposed antenna with and without balun are fabricated and verified.
I. T. E. Elfergani, J. Rodriguez, F. M. Abdussalam, C. H. See, R. A. Abd-Alhameed 2017, 'Miniaturized Balanced Antenna with Integrated Balun for Practical LTE Applications',Radioengineeringhttps://www.radioeng.cz/fulltexts/2017/17_02_0444_0452.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The electromagnetic simulation shows that the proposed balun results in a perfect impedance matching.
Khalid F. A. Hussein 2014, 'Optimized Wideband Impedance Matching Balun for Conducting Two-Arm Antennas', International Journal of Antennas and Propagationhttp://dx.doi.org/10.1155/2014/748216. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Such characteristics of the balun make it an ideal candidate for various broadband differential circuits.
Abdul Ali, Jongwon Yun, Herman Jalli Ng, Dietmar Kissinger, Franco Giannini, PaoloColantonio 2019, 'High Performance Asymmetric Coupled Line Balun at Sub-THz Frequency', Applied Scienceshttps://www.mdpi.com/2076-3417/9/9/1907. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Both magnetic and electric coupling structures were implemented to provide high performance balun-bandpass responses.
Chia-Mao Chen, Shoou-Jinn Chang, Yen-Liang Pan, Cheng-Yi Chen, Cheng-Fu Yang 2014, 'Fabrication of Compact Microstrip Line-Based Balun-Bandpass Filter with High Common-ModeSuppression', Mathematical Problems in Engineeringhttp://dx.doi.org/10.1155/2014/985064. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
These additional parameters, together with the double slot width, provide more flexibility to design the balun for better impedance matching.
Khalid F. A. Hussein 2014, 'Optimized Wideband Impedance Matching Balun for Conducting Two-Arm Antennas', International Journal of Antennas and Propagationhttp://dx.doi.org/10.1155/2014/748216. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The high cross-polarization of the microstrip integrated balun-fed printed dipole antenna cannot meet the demands of many engineering applications.
Huang Jingjian, Zhang Xiaofa, Xie Shaoyi, Wu Weiwei, Yuan Naichang 2014, 'Suppression of Cross-Polarization of the Microstrip Integrated Balun-Fed Printed DipoleAntenna', International Journal of Antennas and Propagationhttp://dx.doi.org/10.1155/2014/765891. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In this work, we propose a wideband multi-section transforming coupled-line balun using near equal length transmission line elements.
Srikanth Itapu, Mohammad Almalkawi, Vijay Devabhaktuni 2015, 'A 0.8–8 GHz Multi-Section Coupled Line Balun', Electronicshttp://www.mdpi.com/2079-9292/4/2/274. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The impedance bandwidth of the balun determined by a back-to-back configuration can sometimes overestimate the balun operating bandwidth.
Dong Sik Woo, Young-Ki Cho, Kang Wook Kim 2013, 'Balance Analysis of Microstrip-to-CPS Baluns and Its Effects on Broadband AntennaPerformance', International Journal of Antennas and Propagationhttp://dx.doi.org/10.1155/2013/651040. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)