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Title: A planar microstrip crossover with lumped inductors for three intersecting channels
Authors: Wu, L.-S.
Guo, Y.-X. 
Mao, J.-F.
Keywords: Eigen-admittance
lumped inductor
planar microstrip crossover
sixfold rotational symmetric structure
three intersecting channels
Issue Date: 2014
Citation: Wu, L.-S., Guo, Y.-X., Mao, J.-F. (2014). A planar microstrip crossover with lumped inductors for three intersecting channels. IEEE Transactions on Microwave Theory and Techniques 62 (4) : 851-860. ScholarBank@NUS Repository.
Abstract: A planar microstrip crossover is proposed by using a stub-loaded ring structure with lumped inductors to realize good transmission and isolation performances for three intersecting channels. It can take the place of three conventional dual-channel crossovers. Since the component is with a sixfold rotational symmetric configuration, it can be analyzed by using its eigen-admittances and the even-/odd-mode theory. The analytical equations are derived to generate the design curves to determine the circuit parameters, operating bandwidth and transmission phase. The influence of the utilized lumped inductors on the crossover performance is also considered. A prototype is developed at 1.0 GHz with an occupied area of 0.308 × 0.294 λg 2, where λg is the guided wavelength of the central frequency. The performances of diagonal transmission, port matching, and isolation between different channels are achieved with a 6% operating bandwidth, which has been demonstrated by the theoretical, simulated, and measured results. © 1963-2012 IEEE.
Source Title: IEEE Transactions on Microwave Theory and Techniques
ISSN: 00189480
DOI: 10.1109/TMTT.2014.2309558
Appears in Collections:Staff Publications

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