TY - GEN
T1 - Vialess composite right/left-handed stripline and its applications for broadband 3-dB and tunable couplers
AU - Choi, Jun H.
AU - Wu, Chung Tse Michael
AU - Lee, Hanseung
AU - Itoh, Tatsuo
N1 - Publisher Copyright:
© 2014 European Microwave Association.
PY - 2014/12/15
Y1 - 2014/12/15
N2 - Vialess shielded composite right/left-handed (CRLH) stripline is proposed. The structure preserves the CRLH properties while preventing undesired radiations and minimizing electromagnetic interference (EMI) coupling from the surrounding noisy environments. The vialess topology also allows a simple realization option. As an application example, a 3-dB directional coupler and a novel broadband tunable directional coupler are designed and fabricated. For the 3-dB coupler, both simulated and measured results show high coupling level over 33 % operation bandwidth. For the broadband tunable coupler, a single varactor is used to tune the coupling level between the two output ports. Simulation results based on the ideal variable capacitor show the amplitude difference between the two outputs ports can be tuned from 0 to 6 dB over the percent bandwidth of around 32 %. Fabricated circuit shows the tuning capability, verifying the feasibility of designing broadband tunable coupler based on CRLH stripline. The proposed structure may be applicable for high frequency microwave waveguides requiring broadband dispersive characteristics of the CRLH structure.
AB - Vialess shielded composite right/left-handed (CRLH) stripline is proposed. The structure preserves the CRLH properties while preventing undesired radiations and minimizing electromagnetic interference (EMI) coupling from the surrounding noisy environments. The vialess topology also allows a simple realization option. As an application example, a 3-dB directional coupler and a novel broadband tunable directional coupler are designed and fabricated. For the 3-dB coupler, both simulated and measured results show high coupling level over 33 % operation bandwidth. For the broadband tunable coupler, a single varactor is used to tune the coupling level between the two output ports. Simulation results based on the ideal variable capacitor show the amplitude difference between the two outputs ports can be tuned from 0 to 6 dB over the percent bandwidth of around 32 %. Fabricated circuit shows the tuning capability, verifying the feasibility of designing broadband tunable coupler based on CRLH stripline. The proposed structure may be applicable for high frequency microwave waveguides requiring broadband dispersive characteristics of the CRLH structure.
KW - Composite right/left-handed (CRLH)
KW - directional coupler
KW - stripline
KW - tunable
UR - http://www.scopus.com/inward/record.url?scp=84929243228&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84929243228&partnerID=8YFLogxK
U2 - 10.1109/EuMC.2014.6986433
DO - 10.1109/EuMC.2014.6986433
M3 - Conference contribution
AN - SCOPUS:84929243228
T3 - European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
SP - 315
EP - 318
BT - European Microwave Week 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
Y2 - 6 October 2014 through 9 October 2014
ER -