Dual-Band Branch-Line Couplers With Short/Open-Ended Stubs
Wenjie Feng, Xiwen Duan, Yongrong Shi, Xin Yu Zhou, Wenquan Che
Abstract
Two dual-band branch line couplers with arbitrary power division are proposed in this brief. By adopting half-wavelength open/short-ended stubs in improved couplers, the dual-band operations could effectively be implemented while ensuring a compact size. Furthermore, the frequency is tunable by changing the characteristic impedance of the transmission line. For practical verification, two branch line coupler (εr = 2.65, h = 0.5 mm) operating at 0.9/1.8GHz and 0.9/1.57GHz are constructed in microstrip technology and tested. The measured results are in good agreement with the simulated ones.
Topics & Concepts
Multi-band deviceMicrostripTransmission lineElectric power transmissionElectrical impedanceLine (geometry)Power dividers and directional couplersDual (grammatical number)Power (physics)Hybrid couplerRat-race couplerElectrical engineeringDivision (mathematics)OpticsPhysicsComputer scienceEngineeringMathematicsAntenna (radio)GeometryQuantum mechanicsLiteratureArithmeticArtMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface TechnologiesRadio Frequency Integrated Circuit Design