Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/631881
Title: Single and Multiband Acoustic-Wave-Lumped- Element-Resonator (AWLR) Bandpass Filters With Reconfigurable Transfer Function
Authors: Dimitra Psychogiou;Roberto Gómez-García;Dimitrios Peroulis
subject: Acoustic-wave filter|<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> $k_{t}^{\mathrm {2}}$ </italic> enhancement|RF/microwave filter|multiband filter|surface-acoustic-wave (SAW) resonator|quasi-elliptic-type filter|reconfigurable filter|bandpass filter (BPF)|tunable filter
Year: 2016
Publisher: IEEE
Abstract: New types of single- and multiband acoustic-wave resonator-based bandpass filters (BPFs) with continuously variable transfer function in terms of bandwidth (BW), selectivity, and out-of-band isolation (IS) are presented. They are based on single-/multiband resonant branches that are shaped by high-quality-factor (Q) acoustic-wave-lumped-element resonators (AWLRs) and are connected in parallel to an all-pass network through variable impedance inverters. With the proposed configuration, quasi-elliptic-type passbands with wide fractional BWs (FBWs)-i.e., larger than the electromechanical coupling coefficient k<sub>t</sub>2 of its constituent acoustic-wave resonator-can be realized and continuously tuned while preserving the high-Q characteristics of its acoustic-wave resonators. Furthermore, by reconfiguring the location of the transmission zeros (TZs) of the AWLRs, tunable out-of-band IS profiles and asymmetrical passband BWs can be created. The operating principles of the devised spectrally agile filter concept are demonstrated through coupling-matrix-based synthesis and linear-circuit simulations. They are experimentally validated at the UHF band through the realization of: 1) a three-pole/six-TZ single-band prototype at 418 MHz with tunable BW between 0.16 and 0.49 MHz (FBW: 0.5-1.5k<sub>t</sub>2 ) for an insertion loss (IL) between 3.3 and 1.2 dB (i.e., effective Q &gt; 10000), reconfigurable order (first-to-third-order states), out-of-band IS controllability in terms of BW (18-26.5 MHz at the upper stopband) and magnitude (23-46 dB at 426 MHz), and an intrinsically selectable allpass mode and 2) a six-pole/nine-TZ dual-band BPF with two transmission bands located at 418 and 433.9 MHz. They, respectively, feature symmetrical and asymmetrical BW tuning between 0.3-0.54 and 0.6-1.23 MHz with in-band IL &lt;;1.7 dB for all tunable states.
URI: http://localhost/handle/Hannan/183218
http://localhost/handle/Hannan/631881
ISSN: 0018-9480
1557-9670
volume: 64
issue: 12
Appears in Collections:2016

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Title: Single and Multiband Acoustic-Wave-Lumped- Element-Resonator (AWLR) Bandpass Filters With Reconfigurable Transfer Function
Authors: Dimitra Psychogiou;Roberto G&#x00F3;mez-Garc&#x00ED;a;Dimitrios Peroulis
subject: Acoustic-wave filter|<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> $k_{t}^{\mathrm {2}}$ </italic> enhancement|RF/microwave filter|multiband filter|surface-acoustic-wave (SAW) resonator|quasi-elliptic-type filter|reconfigurable filter|bandpass filter (BPF)|tunable filter
Year: 2016
Publisher: IEEE
Abstract: New types of single- and multiband acoustic-wave resonator-based bandpass filters (BPFs) with continuously variable transfer function in terms of bandwidth (BW), selectivity, and out-of-band isolation (IS) are presented. They are based on single-/multiband resonant branches that are shaped by high-quality-factor (Q) acoustic-wave-lumped-element resonators (AWLRs) and are connected in parallel to an all-pass network through variable impedance inverters. With the proposed configuration, quasi-elliptic-type passbands with wide fractional BWs (FBWs)-i.e., larger than the electromechanical coupling coefficient k<sub>t</sub>2 of its constituent acoustic-wave resonator-can be realized and continuously tuned while preserving the high-Q characteristics of its acoustic-wave resonators. Furthermore, by reconfiguring the location of the transmission zeros (TZs) of the AWLRs, tunable out-of-band IS profiles and asymmetrical passband BWs can be created. The operating principles of the devised spectrally agile filter concept are demonstrated through coupling-matrix-based synthesis and linear-circuit simulations. They are experimentally validated at the UHF band through the realization of: 1) a three-pole/six-TZ single-band prototype at 418 MHz with tunable BW between 0.16 and 0.49 MHz (FBW: 0.5-1.5k<sub>t</sub>2 ) for an insertion loss (IL) between 3.3 and 1.2 dB (i.e., effective Q &gt; 10000), reconfigurable order (first-to-third-order states), out-of-band IS controllability in terms of BW (18-26.5 MHz at the upper stopband) and magnitude (23-46 dB at 426 MHz), and an intrinsically selectable allpass mode and 2) a six-pole/nine-TZ dual-band BPF with two transmission bands located at 418 and 433.9 MHz. They, respectively, feature symmetrical and asymmetrical BW tuning between 0.3-0.54 and 0.6-1.23 MHz with in-band IL &lt;;1.7 dB for all tunable states.
URI: http://localhost/handle/Hannan/183218
http://localhost/handle/Hannan/631881
ISSN: 0018-9480
1557-9670
volume: 64
issue: 12
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7733111.pdf4.34 MBAdobe PDFThumbnail
Preview File
Title: Single and Multiband Acoustic-Wave-Lumped- Element-Resonator (AWLR) Bandpass Filters With Reconfigurable Transfer Function
Authors: Dimitra Psychogiou;Roberto G&#x00F3;mez-Garc&#x00ED;a;Dimitrios Peroulis
subject: Acoustic-wave filter|<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> $k_{t}^{\mathrm {2}}$ </italic> enhancement|RF/microwave filter|multiband filter|surface-acoustic-wave (SAW) resonator|quasi-elliptic-type filter|reconfigurable filter|bandpass filter (BPF)|tunable filter
Year: 2016
Publisher: IEEE
Abstract: New types of single- and multiband acoustic-wave resonator-based bandpass filters (BPFs) with continuously variable transfer function in terms of bandwidth (BW), selectivity, and out-of-band isolation (IS) are presented. They are based on single-/multiband resonant branches that are shaped by high-quality-factor (Q) acoustic-wave-lumped-element resonators (AWLRs) and are connected in parallel to an all-pass network through variable impedance inverters. With the proposed configuration, quasi-elliptic-type passbands with wide fractional BWs (FBWs)-i.e., larger than the electromechanical coupling coefficient k<sub>t</sub>2 of its constituent acoustic-wave resonator-can be realized and continuously tuned while preserving the high-Q characteristics of its acoustic-wave resonators. Furthermore, by reconfiguring the location of the transmission zeros (TZs) of the AWLRs, tunable out-of-band IS profiles and asymmetrical passband BWs can be created. The operating principles of the devised spectrally agile filter concept are demonstrated through coupling-matrix-based synthesis and linear-circuit simulations. They are experimentally validated at the UHF band through the realization of: 1) a three-pole/six-TZ single-band prototype at 418 MHz with tunable BW between 0.16 and 0.49 MHz (FBW: 0.5-1.5k<sub>t</sub>2 ) for an insertion loss (IL) between 3.3 and 1.2 dB (i.e., effective Q &gt; 10000), reconfigurable order (first-to-third-order states), out-of-band IS controllability in terms of BW (18-26.5 MHz at the upper stopband) and magnitude (23-46 dB at 426 MHz), and an intrinsically selectable allpass mode and 2) a six-pole/nine-TZ dual-band BPF with two transmission bands located at 418 and 433.9 MHz. They, respectively, feature symmetrical and asymmetrical BW tuning between 0.3-0.54 and 0.6-1.23 MHz with in-band IL &lt;;1.7 dB for all tunable states.
URI: http://localhost/handle/Hannan/183218
http://localhost/handle/Hannan/631881
ISSN: 0018-9480
1557-9670
volume: 64
issue: 12
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7733111.pdf4.34 MBAdobe PDFThumbnail
Preview File