Design and Implementation of Slot-coupled Microstrip Components for Wideband Butler Matrix
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
The design of a slot-coupled directional coupler and a slot-coupled crossover for use in a switched beamforming network operating over wideband has been presented and discussed. In order to achieve wideband characteristics, the coupler and the crossover use slot-coupled microstrip transmission line (MTL) technology. Since the slot-coupled components have a structure in which the two signal lines on the top and bottom side are coupled to each other through the rectangular slot on the common ground plane, the amount of the combined signal is determined by the width of the slot, the width of the line and the height of the substrate. The width of the slot should be set to be wider than the width of signal line to induce proper coupling, and the width of the slot should be about 1.5 times to the width of the signal line. It can be seen that the coupling coefficient increases as the ratio of the width of the line to the height of the substrate increases, which means that the amount of the signal coupled to the output port increases as the width of the line increases. The proposed coupler and the crossover have been obtained high performance of 3±0.5dB coupling, 90±1° phase difference, and 0.5dB coupling and 45±3.5° phase shift in the operating frequency band, respectively. In addition, they have been implemented on the double-layered MTL in a small size and without intersecting lines on microstrip substrate.
Abstract
The design of a slot-coupled directional coupler and a slot-coupled crossover for use in a switched beamforming network operating over wideband has been presented and discussed. In order to achieve wideband characteristics, the coupler and the crossover use slot-coupled microstrip transmission line (MTL) technology. Since the slot-coupled components have a structure in which the two signal lines on the top and bottom side are coupled to each other through the rectangular slot on the common ground plane, the amount of the combined signal is determined by the width of the slot, the width of the line and the height of the substrate. The width of the slot should be set to be wider than the width of signal line to induce proper coupling, and the width of the slot should be about 1.5 times to the width of the signal line. It can be seen that the coupling coefficient increases as the ratio of the width of the line to the height of the substrate increases, which means that the amount of the signal coupled to the output port increases as the width of the line increases. The proposed coupler and the crossover have been obtained high performance of 3±0.5dB coupling, 90±1° phase difference, and 0.5dB coupling and 45±3.5° phase shift in the operating frequency band, respectively. In addition, they have been implemented on the double-layered MTL in a small size and without intersecting lines on microstrip substrate.
참고문헌 (15)
- J. H. Winter, "Smart antennas for wireless systems", IEEE Personal Communications, 1, pp.23~27 (1998)
- I. Sfar, "Design of a 4×4 butler matrix for beamforming antenna applications", Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014), pp.1~4 (2014)
- H. Nachouane, "Broadband 4×4 butler matrix using wideband 90° hybrid couplers and crossovers for beamforming networks", 2014 International Conference on Multimedia Computing and Systems (ICMCS), pp.1444~1448 (2014)
- M. Nedil, "Novel butler matrix using CPW multilayer technology", IEEE Transactions on Microwave Theory and Techniques, 54(1), pp.499~507 (2006)
- L. Abdelghani, "Design of a new ultra-wideband 4×4 butler matrix for beamforming antenna applications", Proceedings of the 2012 IEEE International Symposium on Antenna and Propagation, pp.1~2 (2012)
- A. M. Martir, "Wideband slot-coupled butler matrix", IEEE Microwave and Wireless Components Letters, 24(12), pp.848~850 (2014)
- D. M. Pozar, "Microwave engineering" (1990), Addison-Wesley
- M. Nedil, "Novel UWB CB-CPW Butler matrix for wireless applications", Proc. 2014 IEEE Antennas and Propagation Society International Symposium(APSURSI), pp.1800~1801 (2014)
- C. J. Chen, "Design of a 60-GHz substrate integrated waveguide butler matrix—A systematic approach", IEEE Trans. Microwave Theory and Technology, 58(7), pp.1724~1733 (2010)
- A. A. M. Ali, "Design and implementation of two-layer compact wideband butler matrices in SIW technology for Ku-band applications", IEEE Transactions on Antennas Propagation, 59(2), pp.503~512 (2011)
- T. Djerafi, "A low-cost wideband 77-GHz planar butler matrix in SIW technology", IEEE Transactions on Antennas and Propagation, 60(10), pp.4949~4954 (2012)
- S. Karamzadeh, "Compact and broadband 4⨉4 SIW butler matrix with phase and magnitude error reduction", IEEE Microwave Wireless Components Letters, 25(12), pp.772~774 (2015)
- A. Talbi, "A compact 4×4 butler matrix for UWB applications", Proc. 2013 IEEE Antennas and Propagation Society Int. Symposium(APSURSI), pp.1010~1011 (2013)
- Y. H. Lee, "Analysis of slot-coupled microstrip components for wideband butler matrix", International Conference on ELectronics, Information, and Communication (ICEIC) 2017, S22, pp.482~484 (2017)
- D. H. Lee, "Broadband 44butler matrix with multilayer slot-coupled microstrip transmission lines", International Conference on ELectronics, Information, and Communication (ICEIC) 2017, P01, pp.638~641 (2017)