Design of Wilkinson Power Dividers with SITL Compensated Microstrip Bandpass Filters
DOI:
https://doi.org/10.13052/2023.ACES.J.381205Keywords:
Harmonic suppression, parallel-coupled line, step impedance transmission line, Wilkinson power dividerAbstract
This paper presents a simple technique for improving performances of a conventional Wilkinson power divider. The technique is achieved by replacing bulky quarter-wave transmission lines with stepped impedance transmission lines (SITL) compensated coupled lines. With the internal function of bandpass filter integrated with the proposed coupled lines, the spurious response at 2nd harmonics frequencies that normally exists in the conventional divider is considerably reduced. Simulated and measured results at 2.1 GHz operating frequency of the proposed and conventional Wilkinson power divider were compared. The proposed divider achieves -3.8 dB insertion loss (S21,S31) and more than 25 dB return loss (S11,S22,S33) across 10% fractional bandwidth. Based on this measurement, the proposed circuit achieves more than 34.5 dB suppression at the 2nd harmonic frequency.
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I. J. Bahl, Lumped Elements for RF and Microwave Circuits, Artech house, 2022.
S. Tantiwit, S. Somwong, and M. Chongcheawchamnan, “Dual-Frequency Six-Port Reflectometer Technique for Quality Determination of Para Rubber Latex,” in 2022 International Electrical Engineering Congress (iEECON), pp. 1-5, IEEE,2022.
S. Srisathit, S. Patisang, R. Phromloungsri, S. Bunnjaweht, S. Kosulvit, and M. Chongcheawchamnan, “High isolation and compact size microstrip hairpin diplexer,” IEEE Microwave and Wireless Components Letters, vol. 15, no. 2, pp. 101-103, 2005.
E. J. Wilkinson, “An N-way hybrid power divider,” IRE Transactions on Microwave Theory and Techniques, vol. 8, no. 1, pp. 116-118, 1960.
M. Hayati and S. Roshani, “A novel Wilkinson power divider using open stubs for the suppression of harmonics,” Applied Computational Electromagnetics Society (ACES) Journal, pp. 501-506, 2013.
S. Roshani, S. Koziel, S. Roshani, M. B. Jamshidi, F. Parandin, and S. Szczepanski, “Design of a patch power divider with simple structure and ultra-broadband harmonics suppression,” IEEE Access, vol. 9, pp. 165734-165744, 2021.
S. Sonasang, M. Jamsai, M. Jalil, N. T. Pham, K. Ray, N. Angkawisittpan, P. Yupapin, S. Boonkirdram, M. A. Palomino-Ovando, M. Toledo-Solano, K. Misaghian, and J. Lugo, “Multiband Rabi antenna using nest microstrip add-drop filter (NMADF) for relativistic sensing applications,” Heliyon, vol. 9, no. 2, 2023.
S. Sonasang, P. Prabpal, P. Sirikan, P. Hakaew, N. T. Pham, P. Yupapin, K. Ray, and S. Boonkirdram, “Rabi antenna using microstrip add-drop multiplexer for electron warp speed investigation,” Chinese Optics Letters, vol. 20, no. 7, p. 073901, 2022.
S. Sonasang and R. Phromloungsri, “The measurement of water level based on parallel-coupled lines with capacitance compensation,” Creative Science, vol. 14, no. 2, pp. 245039-245039, 2022.
S. Sonasang, S. Srisawat, R. Phromloungsri, W. Rattanangam, and N. Angkawisittpan, “Liquid Level Measurement Using Sensors with Microstrip Parallel Coupled Lines,” in 2019 IEEE 2nd International Conference on Power and Energy Applications (ICPEA), pp. 106-109, IEEE, 2019.
D. M. Pozar, Microwave Engineering, John Wiley & Sons, 2011.
M. Chongcheawchamnan, N. Siripon, and I. Robertson, ‘‘Design and performance of improved lumped-distributed Wilkinson divider topology,” Electronics Letters, vol. 37, no. 8, pp. 501-503, 2001.
R. Phromloungsri, M. Chongcheawchamnan, and I. D. Robertson, “Inductively compensated parallel coupled microstrip lines and their applications,” IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 9, pp. 3571-3582, 2006.
S. Sonasang and N. Angkawisittpan, “Design of microstrip parallel-coupled lines with high directivity using symmetric-centered inductors,” Applied Computational Electromagnetics Society (ACES) Journal, pp. 657-663, 2021.
M. Dydyk, “Accurate design of microstrip directional couplers with capacitive compensation,” in IEEE International Digest on Microwave Symposium, pp. 581-584, IEEE, 1990.
M. Dydyk, “Microstrip directional couplers with ideal performance via single-element compensation,” IEEE Transactions on Microwave Theory and Techniques, vol. 47, no. 6, pp. 956-964, 1999.
J. Zhang, L. Li, J. Gu, and X. Sun, “Compact and harmonic suppression Wilkinson power divider with short circuit anti-coupled line,” IEEE Microwave and Wireless Components Letters, vol. 17, no. 9, pp. 661-663, 2007.
X. Yu, S. Sun, and Y. Liu, “Design of wideband filtering power dividers with harmonic suppression based on the parallel-coupled line structures,” Applied Computational Electromagnetics Society Journal (ACES), pp. 468-475, 2018.
H. Zhu, A. M. Abbosh, and L. Guo, “Wideband four-way filtering power divider with sharp selectivity and wide stopband using looped coupled-line structures,” IEEE Microwave and Wireless Components Letters, vol. 26, no. 6, pp. 413-415, 2016.
E. N. Mohamed, A. G. Sobih, and A. M. El-Tager, “Compact Wilkinson power divider with Inductive loaded microstrip line for harmonics suppression,” in 2016 IEEE Middle East Conference on Antennas and Propagation (MECAP), pp. 1-4, IEEE, 2016.
S. Lotfi, S. Roshani, S. Roshani, and M. S. Gilan, “Wilkinson power divider with band-pass filtering response and harmonics suppression using open and short stubs,” Frequenz, vol. 74, no. 5-6, pp. 169-176, 2020.
H. S. Vaziri, S. Zarghami, F. Shama, and A. H. Kazemi, “Compact bandpass Wilkinson power divider with harmonics suppression,” AEU-International Journal of Electronics and Communications, vol. 117, p. 153107, 2020.
R. Phromloungsri and S. Sonasang, “Design and implementation of a wilkinson power divider with integrated band stop filters based on parallel-coupled lines,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 38, no. 3, p. 208, 2023.
X. Wang, M. Yoshikawa, J. Kohagura, Y. Shima, R. Ikezoe, M. Sakamoto, T. Imai, Y. Nakashima, Z. Ma, I. Sakagami, and A. Mase, “A narrow band-pass filter type Wilkinson power divider for IQ demodulator in microwave interferometer system,” Journal of Instrumentation, vol. 10, no. 11, p. C11005, 2015.
J.-H. Park, S.-J. Park, and M.-Q. Lee, ‘‘Quadrature Wilkinson power divider using cross-type short-circuited shunt stub for good amplitude and phase balance,” AEU-International Journal of Electronics and Communications, p. 154783, 2023.
S. Zarghami and M. Hayati, “Narrow-band power dividers with wide range tunable power-dividing ratio,” Scientific Reports, vol. 12, no. 1, p. 17351, 2022.
P. Cheong, K.-I. Lai, and K.-W. Tam, “Compact Wilkinson power divider with simultaneous bandpass response and harmonic suppression,” in 2010 IEEE MTT-S International Microwave Symposium, pp. 1588-1591, IEEE, 2010.
M. Makimoto and S. Yamashita, “Bandpass filters using parallel coupled stripline stepped impedance resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 28, no. 12, pp. 1413-1417, 1980.
S.-C. Lin, P.-H. Deng, Y.-S. Lin, C.-H. Wang, and C. H. Chen, “Wide-stopband microstrip bandpass filters using dissimilar quarter-wavelength stepped-impedance resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 3, pp. 1011-1018, 2006.
S. Kumpang, R. Phromloungsri, and M. Chongcheawchamnan, “Design high-directivity parallel-coupled lines with step-impedance transmission lines,” in 2007 Asia-Pacific Microwave Conference, pp. 1-4, IEEE, 2007.
S. Kumpang, R. Phromloungsri, M. Chongcheawchamnan, M. Krairiksh, and I. Robertson, “Design and application of microstrip parallel-coupled lines employing step-impedance transmission-line compensation,” IET Microwaves, Antennas & Propagation, vol. 3, no. 3, pp. 410-415, 2009.
G. Mahttei, L. Young, and E. Jones, “Microwave filters, impedance matching networks, and coupling Structure,” Norwood, MA, Artech House, 1980.
J.-S. G. Hong and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, 2004.