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Reconfigurable Bandwidth Bandpass Filter With Enhanced Out-of-Band Rejection Using $\pi $ -Section-Loaded Ring Resonator
- Source :
- IEEE Microwave and Wireless Components Letters, IEEE Microwave Compon.Lett.
- Publication Year :
- 2018
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2018.
-
Abstract
- A novel ring resonator bandpass filter with reconfigurable bandwidth with central frequency at 2.4 GHz is demonstrated. Theoretical analysis for computing the resonant frequencies is shown, and the design approach of implementing $\pi $ -section stubs connected to the ring to obtain the bandwidth reconfigurability is explained. The use of reconfigurable $\pi $ -section allows the alteration of the stub’s effective width and therefore the filter’s bandwidth reconfigurability. p-i-n diodes are used as switching elements to achieve the narrowband/wideband response. Coupled line sections are used for suppressing the higher modes by generating out-of-band transmission zeros, resulting in a significantly enhanced out-of-band rejection. Measurements indicate that the 3-dB fractional bandwidth can be switched from 58.5% to 75% at a fixed center frequency of 2.4 GHz with an insertion loss better than 1.1 dB. Moreover, the −20-dB stopband performance is extended to $2.7f_{0}$ .
- Subjects :
- Reconfigurable
Optical resonators
Electric impedance
Ring resonator
02 engineering and technology
Stopband
Switchable bandwidth
Natural frequencies
Resonator
Bandwidth
Bandpass filter (bpf)
Narrowband
Electric frequency control
Band-pass filter
0202 electrical engineering, electronic engineering, information engineering
Resonators
Pin diode
Electrical and Electronic Engineering
Wideband
Reconfigurable bandwidth
Passband
Physics
business.industry
Pass bands
020208 electrical & electronic engineering
Bandwidth (signal processing)
Switchable
020206 networking & telecommunications
Bandpass filters
Condensed Matter Physics
Diodes
Stub (electronics)
Notch filters
P-i-n diode
Optoelectronics
business
Subjects
Details
- ISSN :
- 15581764 and 15311309
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- IEEE Microwave and Wireless Components Letters
- Accession number :
- edsair.doi.dedup.....61ebbeede35031ed86a47732a1b4d91b