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The intrinsic performance of the devices is of great meaning during power amplifiers design. A method to update de-embedding network at higher frequency for packaged power devices is put forward based on physical modeling idea. The de-embedding network at 5.8 GHz of a packaged GaN HEMT is presented and its practicability is verified through error analysis. This method is prospected to be applied to...
To release pressure of solar power satellite engineering, a concentric disc system model is put forward here. Classical Sandwich structure is abandoned for different requirement for planar accuracy between solar array and microwave power transmission array. The solar array is mounted with solar cell on both sides to reduce the system power dynamic range. The microwave power transmission disc circumrotates...
In this paper, a K band 4-way waveguide power divider/combiner based on 3 dB branch-waveguide coupler and E-plane dual-probe waveguide-to-microstrip power divider/combiner is proposed. The authors simulated branch-waveguide coupler and dual-probe waveguide-to-microstrip power divider/combiner respectively. There are good agreements between the experimental results and simulations. Then separate the...
This paper presents a 60 GHz power combining system using an eight-way radial waveguide structure and four-way solid-state power combining modules. At 58∼63 GHz, the return loss at each port of the radial waveguide power combiner is below −20dB, the insert loss is below 0.2 dB. The differences of amplitude and phase between input ports are within 0.2dB and 0.5 ° respectively. The return loss of the...
A high efficiency power combining demonstration is presented in this paper of 4 K-band TWTAs based on magic-T corporate combiners. A low loss, amplitude and phase balanced, high power corporate magic-T combiner is designed. Power combining efficiencies of greater than 90% and output power of more than 340W over a 0.6 GHz frequency band are successfully demonstrated. Such hybrid junctions can also...
The solar power satellite (SPS) will serve as an important energy source in the future and many models have been investigated around the world. Microwave power transmission (MPT) is one of the most important technologies of a SPS system. A large power generation and transmission panel is often considered with emphasis in MPT research. Active integrated antenna (AIA) can be employed to construct such...
Spatial power combining amplifier has gained worldwide interest since 1990's and many of them have been developed in both open space and enclosed space. Combing efficiency describes the effectiveness of the combiner in summing all of the available power from active devices. Although it is one of the key figures of merit, some aspects still could not be understood clearly. In this paper spatial power...
The solar power satellite (SPS) is potentially an important energy source in the future and many models have been investigated around the world. Microwave power transmission (MPT) is the pivotal technology of a SPS system. A large power generation and transmission panel is often considered with emphasis in MPT research. Two architectures may be to construct the space segment of the MPT system. For...
This paper presents a 60 GHz low loss, amplitude and phase balanced radial waveguide power combiner using a structure easy to manufacture and assembly. At V band 58∼63 GHz, the return loss at each port of the radial waveguide power combiner is below −20dB, the insert loss from input port to output port is below 0.2 dB. The differences of amplitude and phase between input ports are within 0.2dB and...
Magic tee is widely used in microwave systems; the four arms of conventional magic tee direct at four different directions, which give inconvenience to the assemblage of a system. In this paper, An E-plane folded magic tee is presented. The designed E-plane folded magic tee for spatial power combining is analyzed in HFSS, and the result is also presented here. For the convenience of assemblage, the...
High power amplifier is the key element of microwave transmitters. Solid-state spatial power combiner is issued to replace traveling wave tube amplifier (TWTA) in space communication systems. To comply with space requirements a new compact Ka-band spatial power combining architecture is proposed using a double-faced tray. To match the 2 times 2 combining structure, double antipodal finline is designed...
In this paper, we present a Ka-band power combining amplifier based on a new single double faced tray architecture. Using 4 off-the-shelf GaAs monolithic-microwave integerated-circuit (MMIC) power amplifiers with double antipodal finline power splitting/combining antenna arrays, the power combining circuit can produced up to 83% of combining efficient. Taking one with another, the new combining architecture...
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