@article{ART002617127},
author={Doo-Yeong Yang},
title={Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line},
journal={Journal of Knowledge Information Technology and Systems},
issn={1975-7700},
year={2020},
volume={15},
number={4},
pages={473-480},
doi={10.34163/jkits.2020.15.4.003}
TY - JOUR
AU - Doo-Yeong Yang
TI - Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line
JO - Journal of Knowledge Information Technology and Systems
PY - 2020
VL - 15
IS - 4
PB - Korea Knowledge Information Technology Society
SP - 473
EP - 480
SN - 1975-7700
AB - In designing the branch line coupler, it is very important to set the impedance of each line because the amount of signal coupling at the output port is determined by the impedance of each line constituting the branch line. Since the coupling coefficient between the input and output ports is determined by the impedance condition of the line in the multi-stage branch line structure, the impedance of each line to obtain the desired coupling coefficient can be obtained by applying even-odd mode circuit analysis. In this paper, the multi-stage microstrip branch line structure is constructed and a hybrid coupling structure is used to distribute the half-power type of circuit lines connected to each port for signal transmission. We also obtained the broadband characteristics by optimizing the width and length of the line impedance to reduce the phase error within the operating range. We also analyzed the influence of the output signal amplitude and phase error on the beam pattern and beam steering direction obtained from the wide band design results of the five-stage branch line coupler. The fabricated hybrid branch line coupler has the operating frequency band of 2.15 GHz to 3.4 GHz, with a relative bandwidth of about 47%. In the band, the transmission characteristic and phase difference between output ports are less than 3.3 ± 0.5 dB and 90±1°. It shows good insertion loss, a half power and wide band characteristics.
KW - Multi-stage microstrip branch line structure;Hybrid coupling structure;Broadband characteristics;Beam pattern and beam steering;Five-stage branch line
DO - 10.34163/jkits.2020.15.4.003
ER -
Doo-Yeong Yang. (2020). Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line. Journal of Knowledge Information Technology and Systems, 15(4), 473-480.
Doo-Yeong Yang. 2020, "Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line", Journal of Knowledge Information Technology and Systems, vol.15, no.4 pp.473-480. Available from: doi:10.34163/jkits.2020.15.4.003
Doo-Yeong Yang "Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line" Journal of Knowledge Information Technology and Systems 15.4 pp.473-480 (2020) : 473.
Doo-Yeong Yang. Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line. 2020; 15(4), 473-480. Available from: doi:10.34163/jkits.2020.15.4.003
Doo-Yeong Yang. "Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line" Journal of Knowledge Information Technology and Systems 15, no.4 (2020) : 473-480.doi: 10.34163/jkits.2020.15.4.003
Doo-Yeong Yang. Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line. Journal of Knowledge Information Technology and Systems, 15(4), 473-480. doi: 10.34163/jkits.2020.15.4.003
Doo-Yeong Yang. Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line. Journal of Knowledge Information Technology and Systems. 2020; 15(4) 473-480. doi: 10.34163/jkits.2020.15.4.003
Doo-Yeong Yang. Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line. 2020; 15(4), 473-480. Available from: doi:10.34163/jkits.2020.15.4.003
Doo-Yeong Yang. "Implementation and Design of Wideband Coupler Composed of Multi-stage Branch Line" Journal of Knowledge Information Technology and Systems 15, no.4 (2020) : 473-480.doi: 10.34163/jkits.2020.15.4.003
