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The method of mode matching (MM) is used to construct ideal waveports in the context of the method of moments (MoM). The waveports can provide not only excitations as sources but also perfectly matched loads for traveling-wave slotted waveguide antennas. Additionally, the application of the higher order basis functions (HOBs) in MoM significantly reduces the number of unknowns compared to the RWG...
This paper focuses on the simulation of electrically large slotted waveguide array using accurate method. The main challenges are the lack of matched terminators and the enormous time and memory space consumption. Mode match method is used to construct the matched terminators, while the parallel high-order MoM is chosen to extend the capacity of MoM. Finally, a Ka-band waveguide array with 2068 narrow-wall...
In this paper, based on equivalent-principle, a parallel hybrid Finite Difference Time Domain (FDTD) and Multilevel Fast Multipole Algorithm (MLFMA) is introduced to analyze the radiation characteristic of an airborne antenna array. The numerical convergence of results is achieved through several iterations. Numerical results show that it can greatly reduce the memory requirement and time consumption.
In this paper, using 100000 CPU cores, the parallel Finite Difference Time Domain (FDTD) algorithm based on MPI is firstly applied to analyze the radiation characteristic of a microstrip antenna array on the National Supercomputing Center in Jinan (NSCC-JN) successfully, which is a domestically-made supercomputer. And the parallel performance of the code is tested on it. The results show that the...
This paper presents a new design of the Yagi antenna with a super-directivity of 8.9dBi. The Yagi antenna has two folded elements; one is a fed element and the other is a parasitic element. Except the high directivity, this antenna also shows quite good input impedance and return loss performance at the working frequency of 300MHz. The 10dB fractional bandwidth is only about 1.3%, which restricts...
We have laid down the optimization guidelines for the scanning of the beam-pattern in the azimuth direction. The procedure of selecting the initial values by using the principle of reciprocity followed by the local optimization is more suited to this application as it gives an accurate value with less iteration. We also show that phase-only technique which is relatively easier to implement is applicable...
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