Electronics Letters · 1993 · 12 citations · 2 references
EngineeringElectrical EngineeringAntennasMicroelectronicsMicrowave EngineeringMicrostrip CircuitsMicrowave Integrated CircuitsMicrowave MaterialsMicrowave MeasurementsMicrowave Semiconductor DevicesRadio-frequency Integrated CircuitsBandwidthBandwidth MeasurementCouplersLange CouplersMicrostrip Integrated CircuitsMonolithic Microwave Integrated Circuit DesignMonolithic Microwave Integrated CircuitsPlanar Microwave Circuits
Very compact novel planar broadband baluns are described. Each balun consists of two Lange couplers. Less than 0.3dB and 2.5° for the amplitude and phase balances, respectively, have been measured over the 1.0–2.2 GHz bandwidth for a microstrip balun. As compared with other reported baluns, these baluns are simpler, more compact, easier to design, and fabricated on only one side of the substrate. They are thus very attractive for microwave integrated (MIC) and monolithic integrated circuit (MMIC) applications.
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