Title :
Design of a compact branch-line coupler with high performance
Author :
Cheng Wang ; Wanchun Tang ; Yongrong Shi ; Wei Zhuang
Author_Institution :
Sch. of Electron. & Opt. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
In this paper, a branch-line coupler based on the planar simplified dual composite right/left-handed (SD-CRLH) transmission line (TL) structure is presented. Based on the parametric analysis of the planar SD-CRLH TL structure, a branch-line coupler operating at 1 GHz is investigated and fabricated. In the frequency range of 0.92-1.08 GHz, the return loss and isolation are better than 15 dB, the insertion loss S21 and S31 are around -3.5 dB, and the phase difference between S21 and S31 is 90°±2°. At 2 GHz, S21 and S31 are lower than -20 dB. The proposed coupler can reduce the area to 44% of the conventional one, and it has high second harmonic suppression performance.
Keywords :
coupled transmission lines; integrated circuit design; planar waveguides; waveguide couplers; compact branch-line coupler design; frequency 0.92 GHz to 1.08 GHz; parametric analysis; planar SD-CRLH transmission line structure; planar simplified dual composite right/left-handed; second harmonic suppression; Couplers; Equivalent circuits; Harmonics suppression; Integrated circuit modeling; Microstrip; Optimized production technology; Spirals;
Conference_Titel :
Communication Problem-Solving (ICCP), 2014 IEEE International Conference on
Print_ISBN :
978-1-4799-4246-6
DOI :
10.1109/ICCPS.2014.7062309
