TY - CONF A1 - Wipf, Christian A1 - Sorge, Roland A1 - Weger, Peter T1 - Hybrid cascode with an isolated NLDMOS and HBT for X-Band power amplifier applications T2 - Silicon Monolithic Integrated Circuits in RF Systems (SiRF), IEEE 11th Topical Meeting on, Phoenix, AZ, 2011 N2 - A cascode amplifier stage with an isolated NLDMOS and SiGe:C HBT was demonstrated. The main advantages of that circuitry concept are a reduced capacitive portion of the input impedance and a significantly increased power gain in comparison to a single NLDMOS amplifier stage. Additionally a more stable input impedance for different RF input power levels can be obtained. The stable and less capacitive input impedance simplifies the design of integrated impedance matching networks. In a first feasibility study a circuit with a NLDMOS gate width of 90 μm showed a maximum gain of 18 dB and a maximum output power of 10 dBm at 11 GHz. To the authors knowledge the circuit concept of a cascode amplifier containing a HBT and an isolated NLDMOS is presented for the first time. Y1 - 2013 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/9489 SN - 978-1-4244-8060-9 SP - 121 EP - 124 PB - IEEE CY - Piscataway ER -