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Frequency performance enhancement of resonant slotted waveguide arrays through the use of wideband radiators or subarraying

✍ Scribed by J. C. Coetzee; J. Joubert; W. L. Tan

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 207 KB
Volume: 22
Category: Article
ISSN: 0895-2477
DOI: 10.1002/(sici)1098-2760(19990705)22:1<35::aid-mop9>3.0.co;2-m

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✦ Synopsis

Resonant arrays of wa¨eguide slots suffer from se¨ere bandwidth limitations, which are caused by the frequency dependence of the slot properties, and by the shift in the positions of the standing-wa¨e peaks relati¨e to the slot positions. In this paper, the effects of the use of wideband radiators and subarrays are assessed by means of two represen-tati¨e examples. Results indicate that the potential ad¨antage presented by the utilization of wideband slot radiators is limited, while employing subarraying in the design of planar arrays is the most effecti¨e way of impro¨ing the bandwidth.