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Recently, β-Ga2O3 has shown its great promise for next generation high power device applications due to its ultra-wide bandgap of 4.6–4.9 eV [1]-[5]. Despite the very early development stage, β-Ga2O3 metal-oxide-semiconductor field-effect transistors (MOSFETs) have demonstrated a high blocking voltage of 0.75 kV and a breakdown field of 3.8 MV/cm [2][4]. However, a crucial disadvantage of this material...
This letter presents a compact fractal loop rectenna for RF energy harvesting at GSM1800 bands. First, a fractal loop antenna with novel in-loop ground-plane impedance matching is proposed for the rectenna design. Also, a high-efficiency rectifier is designed in the loop antenna to form a compact rectenna. Measured results show that an efficiency of 61% and an output dc voltage of 1.8 V have been...
In this paper, two types of differential topology rectifier are studied and designed for RF energy harvesting at GSM1800 band 1.83GHz. The proposed differential serial rectifier and differential doubler rectifier are with odd harmonics suppression characteristics. Radial stubs are utilized to filter the output harmonics, which makes the rectifier more compact. The rectifiers with Schottky diodes (SMS7630)...
In this paper, we present a novel impedance matching method for loop antenna by integrating the in-loop ground plane (ILGP). Compact Koch fractal loop is designed for ambient radio frequency (RF) energy harvesting applications at GSM1800 band. Comparing to the conventional matching method for loop antenna, the proposed ILGP doesn't require any additional layout and can easily match the impedance to...
In the past two decades, the GaN-based high-electron-mobility-transistor (HEMT) has attracted tremendous attentions due to its wide bandgap, high electron mobility and high electron saturation velocity, which makes it a good candidate in the area of high frequency and high power applications [1]-[5]. However, there are still some issues such as high density of surface states and high gate leakage...
This paper presents a compact Koch fractal loop antenna designed for ambient radio frequency (RF) energy harvesting at GSM1800 band. Novel impedance matching method is proposed by using an embedded metal plane (EMP) within the loop. Comparing to the conventional loop antenna, the antenna with EMP has a bit lower resonance frequency and the input impedance can be easily matched to 50 Ohm. The metal...
In order to improve the reusability and efficiency of software development for in-vehicle information platform, a reusable and extensible object-oriented framework was proposed. Firstly, by analyzing the characteristics and demands in the related field, the meta-model of in-vehicle information platform was designed. Then, based on the meta-model and according to the domain feature, the framework was...
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