Erratum to: Design of a compact tri-band branch line coupler using double-lorentz composite right/left-handed transmission lines (Microwave and Optical Technology Letters, (2017), 59, 4, (918-924), 10.1002/mop.30424)

Received 8 September 2016 In the above-mentioned article, which appeared in Microwave and Optical Technology Letters, Volume 59#4, DOI 30424, the co-corresponding author information was not included. The co-corresponding author information is presented below: ¹Division of Electronics and Information Engineering, Chonbuk National University, Jeonju, Republic of Korea; Co-corresponding author: [email protected] ²Department of Electrical Engineering, Soonchunhyang University, Asan, Republic of Korea; Corresponding author: [email protected] In addition, the authors’ acknowledgement was not published. The acknowledgement is shown below: ACKNOWLEDGMENT This work was supported by the Soonchunhyang University Research FUND. The publisher regrets any confusion caused by this error.