Design and analysis of microstrip-line-coupled NRD guide filter based on integral equation techniques
✍ Scribed by Duochuan Li; Francois Boone; Ke Wu
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 401 KB
- Volume
- 19
- Category
- Article
- ISSN
- 1096-4290
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✦ Synopsis
Integral equation techniques which include an order-reduced volume integral equation approach for NRD guide circuits and a generalized surface-volume integral equation approach for planar-NRD guide hybrid circuits have been presented in this article. A gap-coupled NRD guide filter is designed based on the order-reduced volume integral equation method. The two identical high-quality microstrip-line-to-NRD guide transitions are designed by means of the generalized surface-volume integral equation approach. Finally, the optimized length of the NRD guide feed-line is determined and a compact microstripline-coupled NRD filter is obtained. Simulated results are in good agreement with measured results. V