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An ultracompact CRLH‐TL bandpass filter for VHF applications
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- Authors
- Dong-Uk Sim, Jeong Ho Ju, Jong-Hwa Kwon, Seong-Ook Park
- Issue Date
- 2016-03
- Citation
- Microwave and Optical Technology Letters, v.58, no.3, pp.694-697
- ISSN
- 0895-2477
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- Abstract
- This article proposes a new design approach to an ultracompact composite right-/left-handed transmission line (CRLH-TL) bandpass filter with good passband and very broad stopband performances. In order to reduce the size, a series connection of the interdigital capacitor and shorted spiral inductor for realizing CRLH-TL is adopted and optimized to create the target Terrestrial-Digital Multimedia Broadcasting (T-DMB, 174-216 MHz) bandpass filtering. T-DMB was developed in South Korea. The results of a Bloch impedance analysis suggest that the proposed approach generates good impedance matching. The proposed filter has overall dimensions of {\\lambda}g/19 by {\\lambda}g/34 in terms of a center frequency of 180 MHz, a 3 dB fractional bandwidth of over 28%, an insertion loss of much lower than 2 dB, and a good return loss performance in the predicted and measured results.
- KSP Keywords
- 6 MHz, Center frequency, Composite Right/Left-Handed Transmission Line(CRLH-TL), Fractional Bandwidth(FBW), Interdigital capacitor, Loss performance, Return Loss, Series connection, South Korea, Terrestrial-digital multimedia broadcasting(T-DMB), bandpass filter(BFP)