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HFE0503_LeongHighFrequencyDesignBROADBANDDESIGNFromMay2003HighFrequencyElectronicsCopyright2003SummitTechnicalMedia,LLCBroadbandVHF/UHFAmplifierDesignUsingCoaxialTransformersByC.G.GentzlerandS.K.LeongPolyfetRFDeviceshedesireofthearmedforcestomaintaininstantcommunicationswithallforcesrequiresthedesignofminiaturebroadbandpoweramplifierswithgreaterthandecadebandwidth(30to512MHz).Thisbandwidthisrequiredforall-bandtransceiversthatcovertacticalgroundandairfrequenciesinadditiontociviltelecommunicationfrequenciesandthefrequenciesofourallies.All-bandradiosarecommonplaceinvirtuallyeverydeploymentofnewplatforms,aswellasintheretrofittingofexistingcommunicationssystems.Thispaperwilldiscussthedesig……