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A tapered distributed power amplifier is designed for linear mobile phone power application, which covers the 3G mobile phone bandwidth from 800 MHz-2 GHz completely. It illustrates the opportunity of multiple power modes capability for power added efficiency (PAE) enhancement. Each power mode fulfills the WCDMA linearity specification up to a specific maximal output power.
Band-pass distributed amplifiers can provide optimum power performance through the proper design of the phase shifts of the unit cells and by using the so-called dual-fed configuration. In this contribution, the experimental non-linear performance of such an amplifier is described. Measurements have been taken on a 3-stage band-pass distributed amplifier prototype at 1 GHz for two different configurations:...
In this paper we present a novel cascode power matching approach for high efficiency ultra-wideband traveling wave power amplifiers using 0.25 μm SiGe HBT transistors. An inductor between the two cascode transistors increases the output impedance, the bandwidth, and the maximum output power. Design trade-offs for maximum bandwidth, gain, output power, and efficiency are discussed by means of analytical...
The design and performance of a wideband power amplifier MMIC suitable for electronic warfare (EW) systems and other wide bandwidth applications is presented. The amplifier utilizes dual field plate 0.25- mum GaN on SiC device technology integrated into the three metal interconnect (3 MI) process flow. Experimental results for the MMIC at 30 V power supply operation demonstrate greater than 10 dB...
In this paper the analysis, design and measurement of a 2-12 GHz power distributed amplifier for ultra-wideband localization- and sensor applications is presented. The circuit integrates four cascode gain cells, which are capacitively coupled to the base line for power optimization. The collector line has been tapered for efficiency improvement. More than 14 dBm have been measured in the desired frequency...
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