- 易迪拓培训,专注于微波、射频、天线设计工程师的培养
请教:FEKO5.2 近场等效设置时应该注意的细节?
请问在设置馈源的时候都应该具体注意哪些问题?譬如说用六个面等效馈源,等效面距离馈源的距离,还有方向等?
谢谢...
用馈源的近场等效计算--... 您說的是 *.ffe嗎?這個好像是 遠場...
12.17 AR card
With this card the radiation pattern of an antenna is used as an impressed source. The
pattern is read from a data file or defined in the *.pre file below the AR card.
This card has a variety of uses, for example, importing measured radiation patterns,
synthesising arrays from the individual patterns of the elements, realising radiation only
within certain sectors, etc. In the MoM/UTD hybrid it is possible to simulate, for example,
the antenna on its own and to save the far field in a *.ffe file. This field is then
imported and used as source in the UTD part which may greatly speed up the ray tracing
computation as there is now only one source point.
an *.ffe file (*.ffe file)
With this option, the radiation pattern is read from a *.ffe file created with FEKO
(using the DA and FF cards). All the data of the radiation pattern (angles and
field values) are determined from the file. The user should ensure that, for example,
the frequency is correct. If an antenna is analysed with FEKO, the far field can be
exported to the *.ffe file using the commands (for 5◦ angle increments)
DA 0 0 1 0 0
FF 1 37 73 0 0 0 5 5
Note 37 points are used for ϑ and 73 for ϕ to ensure that the radiation pattern is
closed (see also the comment above).
This can then be imported as a source into another model with the command
AR 0 1 1 37 73 1.0 0.0 0.0 0.0 0.0 ...
... 0.0 0.0 0.0 "file.ffe"