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In this paper, a micostrip parallel-coupled dual-mode ring resonator is analyzed based on its equivalent transmission line circuit and the even- and odd-mode method. Closed-form formulas relating the transmission zeros and 3dB fractional bandwidth of the resonator to the circuit parameters are derived, and are verified effective by using a circuit simulator and an electromagnetic simulator. A bandpass...
In this paper, a millimeter-wave ultra-wideband (UWB) bandpass filter is developed by cascading two microstrip dual-mode ring resonators loaded with lambda0/4 and 3lambda0/4 open tuning stubs, respectively. The ring resonators are analyzed by using the even-and odd-mode method, and closed-form formulas are derived to facilitate the design of transmission zeros of these resonators. The filter has a...
A compact millimeter-wave ultra-wideband bandpass filter is proposed for vehicular radar systems. The filter is built by cascading a dual-mode square ring resonator with a multiple-mode parallel-coupled line structure. The ring resonator is loaded with two 3lambda0/4 open stubs to realize a passband width of about 30%. Both the dual-mode ring resonator and the multiple-mode parallel-coupled line structure...
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