Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications

Chia-Hao KU; Hsien-Wen LIU; Yu-Shu LIN; Kuei-Yi LIN; Pao-Jen WANG

doi:10.1587/transele.E94.C.1237

Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications

Chia-Hao KU, Hsien-Wen LIU, Yu-Shu LIN, Kuei-Yi LIN, Pao-Jen WANG

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A planar miniaturized branch-line coupler with harmonic suppression property for UHF band applications is presented in this paper. By properly synthesizing the LC-tanks that employ artificial transmission lines, two pairs of quarter-wavelength branch-lines to respectively meet characteristic impedances of 35.4 and 50 ohms can be obtained with the coupler. For the operating band, it can achieve good 3 dB power division with a 90° phase difference in the outputs of the through and coupled arms. The coupler also has a small area of 20.5(L)18(W) mm², corresponding to 0.11 λg0.1 λg at 922 MHz. Compared with conventional couplers, the proposed design not only offers a wide bandwidth of more than 230 MHz within 1° or 1 dB, but also works with additional harmonic suppression for achieving better performance. Therefore, the proposed branch-line coupler with a compact size is well suitable for power division application.

Publication: IEICE TRANSACTIONS on Electronics Vol.E94-C No.7 pp.1237-1239

Publication Date: 2011/07/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E94.C.1237

Type of Manuscript: LETTER

Category: Microwaves, Millimeter-Waves

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Chia-Hao KU, Hsien-Wen LIU, Yu-Shu LIN, Kuei-Yi LIN, Pao-Jen WANG, "Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications" in IEICE TRANSACTIONS on Electronics, vol. E94-C, no. 7, pp. 1237-1239, July 2011, doi: 10.1587/transele.E94.C.1237.
Abstract: A planar miniaturized branch-line coupler with harmonic suppression property for UHF band applications is presented in this paper. By properly synthesizing the LC-tanks that employ artificial transmission lines, two pairs of quarter-wavelength branch-lines to respectively meet characteristic impedances of 35.4 and 50 ohms can be obtained with the coupler. For the operating band, it can achieve good 3 dB power division with a 90° phase difference in the outputs of the through and coupled arms. The coupler also has a small area of 20.5(L)18(W) mm², corresponding to 0.11 λg0.1 λg at 922 MHz. Compared with conventional couplers, the proposed design not only offers a wide bandwidth of more than 230 MHz within 1° or 1 dB, but also works with additional harmonic suppression for achieving better performance. Therefore, the proposed branch-line coupler with a compact size is well suitable for power division application.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E94.C.1237/_p

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@ARTICLE{e94-c_7_1237,
author={Chia-Hao KU, Hsien-Wen LIU, Yu-Shu LIN, Kuei-Yi LIN, Pao-Jen WANG, },
journal={IEICE TRANSACTIONS on Electronics},
title={Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications},
year={2011},
volume={E94-C},
number={7},
pages={1237-1239},
abstract={A planar miniaturized branch-line coupler with harmonic suppression property for UHF band applications is presented in this paper. By properly synthesizing the LC-tanks that employ artificial transmission lines, two pairs of quarter-wavelength branch-lines to respectively meet characteristic impedances of 35.4 and 50 ohms can be obtained with the coupler. For the operating band, it can achieve good 3 dB power division with a 90° phase difference in the outputs of the through and coupled arms. The coupler also has a small area of 20.5(L)18(W) mm², corresponding to 0.11 λg0.1 λg at 922 MHz. Compared with conventional couplers, the proposed design not only offers a wide bandwidth of more than 230 MHz within 1° or 1 dB, but also works with additional harmonic suppression for achieving better performance. Therefore, the proposed branch-line coupler with a compact size is well suitable for power division application.},
keywords={},
doi={10.1587/transele.E94.C.1237},
ISSN={1745-1353},
month={July},}

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TY - JOUR
TI - Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications
T2 - IEICE TRANSACTIONS on Electronics
SP - 1237
EP - 1239
AU - Chia-Hao KU
AU - Hsien-Wen LIU
AU - Yu-Shu LIN
AU - Kuei-Yi LIN
AU - Pao-Jen WANG
PY - 2011
DO - 10.1587/transele.E94.C.1237
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E94-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 2011
AB - A planar miniaturized branch-line coupler with harmonic suppression property for UHF band applications is presented in this paper. By properly synthesizing the LC-tanks that employ artificial transmission lines, two pairs of quarter-wavelength branch-lines to respectively meet characteristic impedances of 35.4 and 50 ohms can be obtained with the coupler. For the operating band, it can achieve good 3 dB power division with a 90° phase difference in the outputs of the through and coupled arms. The coupler also has a small area of 20.5(L)18(W) mm², corresponding to 0.11 λg0.1 λg at 922 MHz. Compared with conventional couplers, the proposed design not only offers a wide bandwidth of more than 230 MHz within 1° or 1 dB, but also works with additional harmonic suppression for achieving better performance. Therefore, the proposed branch-line coupler with a compact size is well suitable for power division application.
ER -