An approximate parallel-plate waveguide model of a lossy multilayered microstrip line

✍ Scribed by G. A. Kouzaev; M. J. Deen; N. K. Nikolova; A. Rahal

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 128 KB
• Volume: 45
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20712

✦ Synopsis

has been achieved. Slight discrepancies are due to mechanical tolerances of the fabricate prototype, which was built using mechanical etching [6]. The total dimension of the filter is 35.0 mm, corresponding to 50% of the size of a conventional E-plane filter with same specifications. The upper 3-dB cutoff frequency is 9.49 GHz and more than 10-dB attenuation has been achieved at 9.5 GHz due to the finite transmission zero.

4. CONCLUSION

A novel parallel-coupled ridge waveguide-filter topology has been proposed. Miniaturisation by a factor of 2 was achieved upon introducing the parallel coupling of narrow-gap resonators. This topology also allows for cross couplings between resonators and hence the emergence of transmission zeros at finite frequencies. The finite transmission zero has provided a sharp upper cutoff. The simulated and experimental results have been presented. Good agreement between the measurement and the simulation has been observed.