Back to Search
Start Over
Dual-Band Helical Filters Based on Nonuniform Pitch Helical Resonators.
- Source :
-
IEEE Transactions on Microwave Theory & Techniques . Aug2017, Vol. 65 Issue 8, p2886-2892. 7p. - Publication Year :
- 2017
-
Abstract
- A helical resonator with two-sectional different pitches is proposed in this paper. The frequency ratios of the first two resonant modes of the helical resonator can be tuned to desirable values in a certain range by adjusting the pitches. The proposed resonator is applied to design dual-band bandpass helical filters. To achieve control over dual-band filtering characteristics, a feeding structure with step-rectangular plate and a coupling window with three apertures are also proposed to realize the expected external quality factors and coupling coefficients in the two bands. To validate the design, a second order and a fourth order dual-band helical filters are fabricated and measured. The measured results show good agreement with simulation ones. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 65
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 124539589
- Full Text :
- https://doi.org/10.1109/TMTT.2017.2659737