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A high-efficiency push-pull power amplifier has been designed and measured across a bandwidth of 250MHz to 3.1GHz. The output power was 46dBm with a drain efficiency of above 45% between 700MHz and 2GHz, with a minimum output power of 43dBm across the entire band. In addition, a minimum of 60% drain efficiency and 11dB transducer gain was measured between 350MHz and 1GHz. The design was realized using...
A new methodology is presented for designing baluns exhibiting multi-decade bandwidths at microwave frequencies. Simulations show that resistors terminating the outer transmission line suppress the half-wavelength resonance and greatly extend the bandwidth. Using linear measurements at microwave frequencies, ferrite beads have been shown to behave as resistors with a small reactance, suitable for...
This paper focuses on the extension of the successful application of current and voltage waveform engineering of on-wafer devices to power levels relevant to both handset and basestation markets. Effects on the measured waveforms caused by a 50Omega characteristic impedance of the measurement system are investigated showing a significant effect at the lower and crucially at higher harmonics, which...
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