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Control of Power Dividing Ratio in Four-Way Power Divider for Feeding Microstrip Comb-Line Antenna

Morihiko NANJO, Kunio SAKAKIBARA, Nobuyoshi KIKUMA, Hiroshi HIRAYAMA

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Summary :

A one-input four-way power divider is developed for feeding circuit of a microstrip comb-line antenna. The four-way power divider is composed of two-stage tournament-configuration of three Y-junctions. To control the sidelobe level and beam width in radiation pattern of the array, the power dividing ratio is assigned for the four-way power divider. Required dividing ratio is designed by changing the line width to control the impedance. To take impedance matching at the connection parts of the Y-junctions, 1/4-wavelength impedance-transformers are applied to the divider and taper structure is supplied at discontinuities. Four-comb-line antennas are designed and fabricated at 76.5 GHz. We evaluated sidelobe level and beam width by experiment to confirm the performance of the power divider.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.10 pp.2651-2654
Publication Date
2010/10/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.2651
Type of Manuscript
Special Section LETTER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category
Antennas

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