An Approach to 1-to-2n Way Microstrip Balanced Power Divider

An Approach to 1-to-2n Way Microstrip Balanced Power Divider
Title:
An Approach to 1-to-2n Way Microstrip Balanced Power Divider
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IEEE Transactions on Microwave Theory and Techniques
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Publication Date:
01 December 2016
Citation:
J. Shi, K. Xu, W. Zhang, J. X. Chen and G. Zhai, "An Approach to 1-to- $2^{n}$ Way Microstrip Balanced Power Divider," in IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 12, pp. 4222-4231, Dec. 2016. doi: 10.1109/TMTT.2016.2611495
Abstract:
In this paper, an approach to 1-to-2n (n = 2,3,4, ...) way microstrip balanced power divider is proposed for the first time. This approach is realized by one balanced-to-single-ended power divider, 2n-1 single-ended-to-balanced power dividers, and 2n-1 - 2 single-ended power dividers. The function of differential-mode power dividing and common-mode suppression can be ensured by the balanced-to-single-ended and single-ended-to-balanced power dividers. The advantage of this approach is that it can reduce the circuit size effectively when comparing with the approach using all the balanced-to-balanced power dividers. The analysis of the balanced-to-single-ended power divider and the single-ended-to-balanced power divider is realized by combining the standard S-parameters, the mixed-mode S-parameters, and the odd- and even-mode equivalent circuits. To verify the theoretical prediction, three prototypes (one balanced-to-single-ended power divider, one single-ended-to-balanced power divider, and one 1-to-4 way balanced power divider) are fabricated and measured. The fabricated 1-to-4 way balanced power divider with the size of 0.75λg × 2λg shows an insertion loss of 0.45 dB at 1.8 GHz, a fractional bandwidth for a 15-dB return loss of 29%, a 20-dB common-mode suppression of 74.6%, and a 20-dB differential-mode isolation (|Sdd32| and |Sdd42|) of 15.1% and 100%, respectively.
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© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
ISSN:
0018-9480
1557-9670
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