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- Title
Compact Microstrip Branch-line Coupler with Wideband Harmonic Suppression.
- Authors
Cui, Haifei; Wang, Jianpeng; Li, Jia-Lin
- Abstract
one compact microstrip branch-line coupler with wideband harmonic suppression is presented in this letter. The new structure has two significant advantages, which not only effectively reduces the occupied area to 26.5% of the conventional branch-line coupler at 0.96 GHz, but also has high 6th harmonic suppression performance. The measured results indicate that a bandwidth of more than 120 MHz has been achieved while the phase difference between S21 and S31 is within 90° ± 1°. The measured bandwidth of |S21| and |S31| within 3 ± 0.5 dB are 145 MHz and 150MHz, respectively. Furthermore, the measured insertion loss is comparable to that of a conventional branch-line coupler. The new coupler can be easily implemented by using the standard printed-circuit-board etching processes and is very useful for wireless communication systems.
- Subjects
STRIP transmission lines; BROADBAND communication systems; HARMONIC analyzers; BANDWIDTHS; WIRELESS communications; PRINTED circuits
- Publication
Applied Computational Electromagnetics Society Journal, 2012, Vol 27, Issue 9, p766
- ISSN
1054-4887
- Publication type
Article