| New UWB 1:2 Power Divider with Flat In-Band Splitting and Bandpass Filtering Functions |
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Thai Hoa Duong, Ihn-Seok Kim |
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The Industrial Liaison Research Institute, College of Electronics & Information, Kyunghee University |
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| Abstract |
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This paper introduces a new U.S. ultra-wideband(UWB: 3.1~10.6 GHz) 1:2 power divider based on a single section Wilkinson type configuration. The divider provides very flat in-band power splitting, high isolation, low insertion loss, sharp roll-off bandpass filtering, and DC blocking characteristics. The circuit consists of a $lambda$/4 Y resonator, three capacitively coupled $lambda$/2 short-circuited lines, and a resistor between the two output ports. The circuit structure was simulated with ADS and HFSS, and realized with low-temperature co-fired ceramic(LTCC) green tape, which has a dielectric constant of 7.8. $|S_{11}|$ better than 10 dB, $|S_{21}|$ and $|S_{31}|$ less than 3.2 dB, with both $|S_{22}|$ and $|S_{32}|$ measured as better than 12 dB for the whole UWB band. Measurement results agree closely with HFSS simulation results. The power divider has a compact size of $4times9times0.6mm^3$. |
| Key words:
Power Divider, Ultra Wideband(UWB), Bandpass Filter(BPF), DC Block, Capacitive Coupling, LTCC |
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