IEEE - Aerospace and Electronic Systems - November 2019 - 6

A Miniaturized VHF-Band Wilkinson Power Combiner for High-Power Application
Table 1.

Design Parameters of Proposed Combiner
Parameter

Value (mm)

Parameterr

Value (mm)

WS

28

W2

0.3

LS

29

L3

9.6

W50

1.13

L4

1

L50

5

S

1

L1

11.6

S2

1

W1

0.6

Rpin

0.5

L2

0.9

Rscrew

1

isolation between input ports is better than 20 dB at center
frequency. In Figure 5, dimensions of a conventional Wilkinson power combiner and the proposed combiner are
depicted for comparison. The area of the conventional
combiner and the proposed combiner are 28 Â 28(784)
cm2 and 3 Â 3 (9) cm2 respectively, so miniaturization factor of the combiner is about 98.8%.

CONCLUSION
In this paper, a miniaturized Wilkinson power combiner at
the VHF frequency band is proposed. The proposed structure
uses meandered microstrip and stripline in a stacked multilayer structure. The simulated and measured results were in
good agreement. Measured return loss better than 15 dB and
insertion loss less than 0.3 dB were achieved over 65 MHz
bandwidth. Also, isolation between input ports was better
than 25 dB at center frequency. The proposed power combiner has an area of 3 Â 3 cm2, which reduces the area of the
conventional Wilkinson power combiner by 98.8%.

REFERENCES
[1] F. A. Shaikh, S. H. Khan, A. A. Zahirul, and M. H. Habaebi,
"Design and analysis of 1-to-4 Wilkinson power divider for

Figure 3.

antenna array feeding network," in Proc. Int. Conf. Innovative Res. Develop., Bangkok, Thailand, May 2018, pp. 1-4.

Fabricated power combiner, top, and bottom views.

[2] E. J. Wilkinson, "An N-way power divider," IRE Trans.
Microw. Theory Techn., vol. 8, pp. 116-118, Jan. 1960.
[3] D. M. Pozar, Microwave Engineering, 4th ed. Hoboken,
NJ, USA :Wiley, 2012.
[4] T. Kawai, H. Mizuno, I. Ohta, and A. Enokihara,
" Lumped-element quadrature Wilkinson power divider," In
Proc. Asia-Pacific Conf., Singapore, 2009, pp. 1012-1015.
[5] R. Mirzavand, M. Honari, A. Abdipour, and G. Moradi,

Figure 4.

"Compact microstrip Wilkinson power dividers with har-

Simulated and measured results of the proposed power combiner.

monic suppression and arbitrary power ratios," IEEE Trans.
Microw. Theory Techn., vol. 61, no. 1, pp. 61-68, Jan. 2013.
[6] J. Ning, L. Chen, S. Bu, and C. Zeng, "A new design of
compact microstrip Wilkinson power dividers," in Proc.
IEEE Int. Symp. Radio-Freq. Integration Technol., Hefei,
China, 2014, pp. 1-3.
[7] M. Kumar, S. K. N. Islam, G. Sen, S. K. Parui, and S. Das,
"Design of compact Wilkinson power divider with harmonic
suppression for GSM application," in Proc. IEEE Appl.
Electromagn. Conf., Aurangabad, India, 2017, pp. 1-2.
[8] M. Gil, J. Bonache, I. Gil, J. Garcia-Garcia, and F. Martin,
"Miniaturization of planar microwave circuits by using resonant-type left-handed transmission lines," IET Microw.

Figure 5.
Size comparison between the conventional and proposed
combiners.

Antennas Propag., vol. 1, pp. 73-79, 2007.
[9] 'LineCalc'. [Online]. Available: http://literature.cdn.
keysight.com/litweb/pdf/ads2004a/pdf/linecalc.pdf,
Accessed Sep. 2004.

6

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NOVEMBER 2019

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IEEE - Aerospace and Electronic Systems - November 2019

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