0D / HAC (Hearing Aid Compatibility of Mobile Phone)
Result Templates Template Based Post Processing
HAC evaluates the E- and H-nearfields of a radiating device, typically
a mobile phone, in a 2D plane parallel to the front cover of the device,
centered to the speaker point.
Pre-requisite to run the result template is therefore the definition
of both E- and H-field monitores for the frequencies of interest. The
speaker point needs to be marked with a working coordinate system (WCS)
with the origin in the speaker point and the u-v-plane parallel to the
front cover. The WCS needs to be stored (鈥淲CS -> Store Current WCS鈥︹�?
According to the specification of ANSI C63.19 a 50mm x 50mm area is
spanned in 15 mm distance from the speaker point and subdivided in nine
sub-grids. By unchecking the ANSI C63.19 checkbox user-defined areas can
be considered. Also the resolution of the field evaluation can be specified
(default: 1mm).
Power Scaling:
It can be chosen if the power is scaled to port
power or to accepted (radiated) power.
AWF:
Depending on the transmission protocol an 鈥淎rticulation
Weighting Factor, AWF鈥?gets defined. For CDMA, TDMA (50 Hz), UMTS (WCDMA)
and TDMA (22Hz and 11 Hz) the AWF equals 0 dB, for GSM (217) it is -5dB.
鈥淎bs value = simple square sum鈥?
Instead of the real field vector maximum the
absolute value gets computed from 鈥淓max = Sqr(|Ex max|^2 + |Ey max|^2
+ |Ez max|^2). This value is always larger then the real amplitude, but
may represent the way typical measurement equipment is working.
Logfile:
The essential information of the HAC evaluation
is shown in the logfile. All nine E- and H-fild values are shown in original
and scaled form. Additionally the HAC category of each sub-grid value
and those values that get excluded according ANSI C63.19. At the bottom
the final HAC category is shown together with the global exclusion scheme:
鈥?T: Both E- and
H are considered (鈥淭aken鈥?
鈥?E: E-Field got
excluded
鈥?H: H-field got
excluded
鈥?A: Both (鈥淎ll鈥?
are excluded
Show E / Show H:
The E- or H-field in the plane of HAC evaluation
is visualized. The plots get scaled to display both the minimum mand maximum
value within the domain of evaluation (鈥渟can area鈥?. Additionally the
nine sub-grids are displayed.
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E-field |
H-field |
See also
Preloaded
Result Templates, Preloaded
Macros Overview, Monitor
HFSS视频教程
ADS视频教程
CST视频教程
Ansoft Designer 中文教程
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