Wide-stopband Millimeter-wave Bandpass Filter Based on Discriminating Coupling on GaN MMIC
This paper presents a third harmonics up pressed bandpass filter on GaN MMIC (Monolithic Microwave Integrated Circuit). By analysing the voltage distribution at fundamental frequency and third harmonic of the resonators, suitable coupling region between the feeding lines and resonators can be selected. In this way, we make the coupling coefficient at third harmonic to be zero while the coupling coefficient at fundamental frequency is not zero. Therefore, the third harmonic can be suppressed by the discriminating coupling scheme while the fundamental mode responses are unaffected. Meanwhile, to improve the selectivity, source-load coupling is employed to introduce transmission zeros near the passband. For demonstration, a millimeter-wave filter with wide sropband is implemented. The filter is designed based on the technology of GaN MMIC with center frequency of 33.5 GHz and insertion loss of 3.2 dB. The circuit area of the filter is only 410 μm × 210 μm, featuring very compact size.
Jie Kai Lin Xiu Yin Zhang Qing Yi Guo Hsuan-Ling Kao
School of Electronic and Information Engineering South China University of Technology, Guangzhou 510 Department of Electronic Engineering, Chang Gung University, Taoyuan, Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
1339-1342
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）