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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 novel dielectric resonator antenna oscillator (DRAO), which realizes dielectric resonator antenna (DRA) and dielectric resonator oscillator (DRO) simultaneously, is presented in this paper. The design procedure of the parallel-feedback type DRAO at dedicated short range communications band is discussed. Firstly, the DRA was three-dimensional simulated by HFSS. Then the DRO was designed based on...
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...
In this paper, we propose a novel ultra-wideband Wilkinson power divider with symmetric defected ground structure (DGS) having frequency band-notch characteristic. The Wilkinson power divider was invented in 1960 and has wide applications in microwave circuits and antenna feeds. But it has a narrow bandwidth. Several schemes have been devised to increase its bandwidth. The main proposal used series...
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