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Ziqing Chu - IEEE Xplore Author Profile

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In this paper, a novel wideband multibeam array fed by a non-coplanar substrate integrated coaxial line (SICL) Butler matrix is presented for millimeter-wave (mmW) applications. The presented Butler matrix consists of SICL non-coplanar couplers, crossovers, and phase shifters, whose inner signal strips are printed on adjacent layers. Considering the weak coupling between circuits on adjacent layer...Show More
In this paper, a millimeter waves (mmW) metamaterial-based circularly polarized antenna and its 1×4 phased array is proposed. Excited by a triple crossed slot, a slotted patch can act as a metamaterial-based radiator. The feeding line beneath the coupling slot were designed as a notched ring. By adjusting the length of three coupling slots and the angle of notch, the proposed antenna can generate ...Show More
In this paper, a broadband circularly polarized (CP) magneto-electric (ME)-dipole antenna fed by a forked microstrip feeding line is presented for millimeter-wave (mmW) communication. Compared to the similar CP ME-dipole antennas that have been proposed, the presented ME-dipole antenna element owns a much more wider broadband. By deviating the two C-shaped antennas from the y-axis adjusting other ...Show More
This paper presents a wideband endfire antenna fed by substrate integrated coaxial line (SICL) for millimeter-wave applications. Endfire radiation is obtained by combining an arc metallic tapered slot radiator and a compact open-ended parallel plate waveguide. Through a blind via and a metallic radiating wedge, broadband excitation is provided for the radiating part. The presented antenna owns an ...Show More
In this paper, a compact Vivaldi antenna fed by double ridged substrate integrated waveguide (DRSIW) is presented for millimeter-wave (mm W) wireless applications. Compared to the Vivaldi antenna fed by substrate integrated waveguide (SIW), the presented Vivaldi antenna element owns a much more compact lateral size, measuring only 0.52 $\lambda_{0}(\lambda_{0}$ denotes the wavelength in air at 40G...Show More
A method for measuring saturated B-H Curves of silicon steel sheets (SSTs) is proposed in this paper, which is easy to be implemented with common instruments. By processing a small portion of the toroidal ring sample to be particularly narrow, the flux density in this part can reach to a particular high value without using high excitation current. The basic principle and implementation process are...Show More
This paper proposes a method for the fast driving cycle efficiency optimization of interior permanent magnet synchronous machines (IPMSMs) with hairpin windings, considering pulse-width modulation (PWM) induced harmonic losses. The previously established rapid calculation method of PWM-induced harmonic losses based on the small-signal time-harmonic finite element method is incorporated in the mult...Show More
In this paper, a dual-polarized magneto-electric (ME) dipole antenna is presented for millimeter-wave (mmW) wireless applications. The antenna element is composed of four metallic patches loaded with metallic vias, coupling slots, and two sets of feeding lines distributed on different copper cladding layers. Two kinds of orthogonal polarized waves can be produced conveniently by exciting feeding s...Show More