TY - GEN
T1 - A Radio Frequency Non-Reciprocal Network Based on Switched Low-Loss Acoustic Delay Lines
AU - Lu, Ruochen
AU - Manzaneque, Tomas
AU - Yang, Yansong
AU - Gao, Anming
AU - Gao, Liuqing
AU - Gong, Songbin
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/17
Y1 - 2018/12/17
N2 - This work demonstrates the first 4-port radio frequency circulator based on switched low-loss acoustic delay lines. The 4-port circulator is built upon a recently reported frequency-independent, programmable, and non-reciprocal framework based on switched delay lines. Large delays provided by the in-house fabricated, low-loss, and wide-band lithium niobate (LiNbO 3 )SH0 mode acoustic delay lines are leveraged to produce high performance and reduce the modulation effort simultaneously for enabling non-reciprocity. The implemented 4-port circulator has been demonstrated with an 18.8 dB non-recip-rocal contrast between the insertion loss (IL = 6.6 dB)and isolation (25.4 dB)over a fractional bandwidth of 8.8% at a center frequency 155 MHz, using a record low switching frequency of 877.19 kHz. The circulator also shows 25.9 dB suppression for the intra-modulated tones. Upon further development, such a system can potentially lead to wide-band, low-loss chip-scale nonreciprocal RF systems with unprecedented programmability.
AB - This work demonstrates the first 4-port radio frequency circulator based on switched low-loss acoustic delay lines. The 4-port circulator is built upon a recently reported frequency-independent, programmable, and non-reciprocal framework based on switched delay lines. Large delays provided by the in-house fabricated, low-loss, and wide-band lithium niobate (LiNbO 3 )SH0 mode acoustic delay lines are leveraged to produce high performance and reduce the modulation effort simultaneously for enabling non-reciprocity. The implemented 4-port circulator has been demonstrated with an 18.8 dB non-recip-rocal contrast between the insertion loss (IL = 6.6 dB)and isolation (25.4 dB)over a fractional bandwidth of 8.8% at a center frequency 155 MHz, using a record low switching frequency of 877.19 kHz. The circulator also shows 25.9 dB suppression for the intra-modulated tones. Upon further development, such a system can potentially lead to wide-band, low-loss chip-scale nonreciprocal RF systems with unprecedented programmability.
KW - Acoustic delay line
KW - lithium niobate
KW - magnet-less circulator
KW - microelectromechanical systems
KW - non-reciprocity
KW - piezoelectricity
KW - simultaneous transmit and receive
UR - http://www.scopus.com/inward/record.url?scp=85060584369&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060584369&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2018.8579758
DO - 10.1109/ULTSYM.2018.8579758
M3 - Conference contribution
AN - SCOPUS:85060584369
T3 - IEEE International Ultrasonics Symposium, IUS
BT - 2018 IEEE International Ultrasonics Symposium, IUS 2018
PB - IEEE Computer Society
T2 - 2018 IEEE International Ultrasonics Symposium, IUS 2018
Y2 - 22 October 2018 through 25 October 2018
ER -