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This paper presents a design approach for the output matching networks (OMN) required in continuous class B/J power amplifiers (PA). Design equations of the OMN are derived and used to design a class-B/J PA that covers the frequency band from 2.2 GHz to 3.45 GHz. The PA uses the LDMOS device available in the 130 nm SOI technology from STMicroelectronics. Simulation results show that the PA has an...
This paper presents a differential inverse class F power amplifier working in the 60GHz ISM band. Neutralized differential stacked structure is used in the power amplifier to get enough power gain and inverse isolation. The output harmonic waves are controlled by using the transformer and resonance branch to improve the peak power added efficiency (PAE). The proposed power amplifier achieves a maximum...
A theoretical analysis is reported in this paper to investigate the effect that a second harmonic signal which might be present at an amplifier's input has on generating additional intermodulation products, particularly the third-order inter-modulation (IM3) products. The analysis shows that the amplitude of an extra generated IM3 component is equal to the product of the fundamental amplitude, the...
A high power added efficiency (PAE) GaN inverse Class F PA (power amplifier) at 2.14 GHz with UWB (Ultra Wideband) bandpass notched filter is designed, fabricated and tested. For this amplifier, second harmonic and fourth harmonic are rejected by the bias circuit, while third harmonic is controlled by a UWB bandpass notched filter and fifth harmonic is tuned by a traditional λ/4 transmission line...
In this work a 10 W GaN based class-F amplifier at 1 GHz is presented. The presented amplifier uses load modulation principle to achieve high efficiency over 11 dB output dynamic range. The output matching network is an L matching network with a tunable inductor and a tunable capacitor. The tunable inductor is based on a λ/4 impedance inverter and a switchable capacitor bank. The tunable inductor...
In this paper the application of adaptive matching networks for efficiency enhancement of class-E and class-F power amplifiers will be presented. These networks are capable of synthesizing the optimum impedance at the fundamental frequency as well as the suitable terminations at the harmonics. Additionally they use only transmission lines and capacitors, making them suitable for high power applications...
In this work a 6 W GaN based class-F amplifier is presented. The presented amplifier uses an adaptive matching output network to achieve high efficiency over 8.5 dB output dynamic range. The output matching network is an L matching network with a tunable inductor and a tunable capacitor. The tunable inductor is based on a lambda/4 impedance inverter and a switchable capacitor bank. The tunable inductor...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
This paper reports a high efficiency power amplifier (PA), which is based on the class-F configuration using the composite right/left-handed transmission lines as the harmonic trap. Also, the compensation elements with the series capacitor and shunt inductor are used to compensate for the internal parasitic components of the packaged active device in the class-F PA design. To verify this method, a...
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