Abstract
A novel hybrid finite-difference time-domain (FDTD) method and plane wave spectrum (PWS) method was presented for analysis focal field distribution of lens antenna. Firstly, the amplitude and phase distribution in the aperture was simulated by the FDTD method. Moreover, the antenna model was reduced to 1/4 by the pertect electric conductor (PEC) and perfect magnetic conductor (PMC) boundary conditions. And secondly PWS method was applied to calculate the focal field distribution. In order to demonstrate the accuracy and efficiency of this new method, a lens antenna at millimeter-wave band was designed and simulated as an example. Then this lens antenna was measured by the planar-near-fields (PNF) method. Finally, the influence of the measurement probe was characterized also by the FDTD method and taken into account by the calibration. And it is found that the results of focal spot size obtained by the FDTD-PWS method are in good agreement with the experiment data by the probe compensation.
| Original language | English |
|---|---|
| Pages (from-to) | 682-685+713 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 33 |
| Issue number | 6 |
| State | Published - Jun 2007 |
Keywords
- FDTD
- FDTD-PWS hybrid method
- Focal field
- Lens antenna
- PWS
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