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Progress In Electromagnetics Research
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A BROADBAND OUT-OF-PHASE POWER DIVIDER FOR HIGH POWER APPLICATIONS USING THROUGH GROUND VIA (TGV)

By Y. L. Lu, G.-L. Dai, X. Wei, and E. Li

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Abstract:
In this paper, we present a broadband out-of-phase power divider with high power-handling capability. The proposed device consists of several sections of double-sided parallel-strip lines (DSPSLs), a mid-inserted conductor plane, and two external isolation resistors, which are directly grounded for heat sinking. A through ground via (TGV), connecting the top and bottom sides of DSPSLs, is employed. The special metal via is realized to short the isolation resistors at full-frequency band when the odd-mode is excited. Meanwhile, it can be ignored as the excitation is even-mode. This property is efficiently utilized to improve the bandwidth. To examine the proposed power divider in detail, a set of closed-form equations are derived. Meanwhile, the power operation analysis illustrates that the proposed power divider is a good candidate for high power applications. The design charts show that the proposed device can support a wide frequency ratio range (1-1.7). Furthermore, broadband responses can be obtained when proper frequency ratios are adopted. For verification, an experimental power divider operating at 1.25/1.75 GHz is implemented. The measured results exhibit a bandwidth of 44.3% with better than 15 dB return loss and 18 dB port isolation is achieved.

Citation:
Y. L. Lu, G.-L. Dai, X. Wei, and E. Li, "A Broadband Out-of-Phase Power Divider for High Power Applications Using through Ground via (Tgv)," Progress In Electromagnetics Research, Vol. 137, 653-667, 2013.
doi:10.2528/PIER13010705
http://www.jpier.org/PIER/pier.php?paper=13010705

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