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A V-Band solid-state power amplifier/combiner is demonstrated in this paper. 8-way radial-line power combiner/divider and microstrip-to-waveguide transitions are proposed and designed. The insert losses of the passive combiner/divider is 2.6 dB as tested in back-to-back configuration, which indicates about 0.3 dB insert loss of the combine/divider network, and exhibits a combining efficiency of 93%...
A design technique for dual-band multi-way Doherty power amplifier (PA) using dual-band networks is proposed in this paper. A T-network and a two-section line network are used to implement dual-band impedance transformer. Experimentally, the proposed PA achieves a power added efficiency (PAE) of 33% with 7dB back-off and 29% with 8 dB back-off from the saturated output power at 0.92 GHz and 1.99 GHz...
This paper proposes a novel and easily-implemented method for Class-J power amplifiers. The 2nd harmonic impedance matching networking is designed and realized by using microstrip stub networks. To prove the concept, a PA prototype operating at the frequency range from 1.7 GHz to 2.24 GHz is implemented. In the field experimental results, it achieves the drain efficiency of above 62% at a fractional...
The third-order intermodulation coefficient (IMD3) is an important measure of linearity of a PA, and it is always measured using a two-tone excitation signal. A two-tone excitation signal with equal amplitudes and a frequency spacing of 10 MHz is adopted in this simulation. For comparison, both the measurement results of the proposed PA without EER linearization technology at a constant drain bias...
This paper proposes a novel Doherty power amplifier (PA) that realizes concurrent dual-band operation. A T-network is used to implement a dual-band impedance transformer and a phase shifter simultaneously. To prove the concept a PA is designed operating at 900 MHz and 2000 MHz simultaneously. In the experimental results, the concurrent dual-band PA achieves a drain efficiency of 39.8% with an output...
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