Compact Filtering Rat-Race Hybrid With Wide Stopband
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 7137686 |
Pages (from-to) | 2550-2560 |
Journal / Publication | IEEE Transactions on Microwave Theory and Techniques |
Volume | 63 |
Issue number | 8 |
Online published | 26 Jun 2015 |
Publication status | Published - Aug 2015 |
Link(s)
Abstract
This paper presents a novel method to design filtering rat-race hybrids with wide-stopband bandpass responses. Four ± K-inverters with bandpass functions are utilized to replace the one or three quarter-wavelength transmission lines in the conventional rat-race hybrid. The ± K-inverters consist of transmission lines and capacitors, which can reduce the area occupied and suppress the high-order harmonics. Furthermore, the isolation performance is enhanced by embedding the ± K-inverters. Theoretical analysis is carried out and design equations are derived. For demonstration, a filtering rat-race hybrid with bandpass responses is implemented. The center frequency is located at 470 MHz with the insertion loss of 1.2 dB. Good in-phase and out-of-phase characteristics are observed. Comparisons between the measured and simulated results are also presented to verify the theoretical analysis. The overall size is only 4.6% of the conventional hybrid and stopband is extended to 5f0.
Research Area(s)
- Bandpass response, dual function, rat-race hybrid, size reduction, wide stopband
Citation Format(s)
Compact Filtering Rat-Race Hybrid With Wide Stopband. / Wang, Kai-Xu; Zhang, Xiu Yin; Zheng, Shao Yong et al.
In: IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 8, 7137686, 08.2015, p. 2550-2560.
In: IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 8, 7137686, 08.2015, p. 2550-2560.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review