Wideband Four-Way Filtering Power Divider With Sharp Selectivity and Wide Stopband Using Looped Coupled-Line Structures

A compact wideband four-way filtering PD is presented. The structure of the proposed device includes a pair of looped coupled-line structures to provide the needed power division to four output ports. Moreover, a pair of short-ended coupled-line stubs is used to introduce multiple transmission poles and transmission zeros for a sharp cut-off of the passband and high upper-stopband rejection. A detailed design procedure is shown to determine the initial design parameters. A prototype is designed, simulated and measured experimentally. The measured results show 56.5% bandwidth centered at 1.5 GHz with more than 15 dB upper-stopband rejection up to 4.15 GHz, more than 13 dB in-band isolation, and 15 dB return loss at all output ports.

[1]  Yong Fan,et al.  Compact in-phase power divider integrated filtering response using spiral resonator , 2013 .

[2]  Tianyu Zhang,et al.  A Compact Four-way Dual-band Power Divider Using Lumped Elements , 2015, IEEE Microwave and Wireless Components Letters.

[3]  Amin M. Abbosh,et al.  Analytical closed-form solutions for different configurations of parallel-coupled microstrip lines , 2009 .

[4]  Yong Fan,et al.  Wideband Four-Way Filtering-Response Power Divider With Improved Output Isolation Based on Coupled Lines , 2014, IEEE Microwave and Wireless Components Letters.

[5]  Kaijun Song.  Compact filtering power divider with high frequency selectivity and wide stopband using embedded dual-mode resonator , 2015 .

[6]  Sheng-Fa Chang,et al.  Microstrip bandpass power divider with high frequency selectivity and good in-band isolation , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[7]  Xiu Yin Zhang,et al.  Single- and Dual-Band Power Dividers Integrated With Bandpass Filters , 2013, IEEE Transactions on Microwave Theory and Techniques.

[8]  He Zhu,et al.  Compact Ultra-Wideband (UWB) Bandpass Filter Using Dual-Stub-Loaded Resonator (DSLR) , 2013, IEEE Microwave and Wireless Components Letters.

[9]  Wonseok Choe,et al.  Compact Modified Wilkinson Power Divider With Physical Output Port Isolation , 2014, IEEE Microwave and Wireless Components Letters.

[10]  Sheng Sun,et al.  A Novel Wideband Bandpass Power Divider With Harmonic-Suppressed Ring Resonator , 2013, IEEE Microwave and Wireless Components Letters.

[11]  Jun-Fa Mao,et al.  A Four-Way Microstrip Filtering Power Divider With Frequency-Dependent Couplings , 2015, IEEE Transactions on Microwave Theory and Techniques.