To determine the effects of 1200 MHz irradiation on patterns of heat disposition, heart rate, blood pressure, and respiratory rate in anesthetized rats in E orientation (long axis of body parallel to electric field) and H orientation (long axis of body parallel to magnetic field).
| Exposure | Parameters |
|---|---|
|
Exposure 1:
1.2 GHz
Modulation type:
CW
Exposure duration:
until the temperature had risen from 38.5° to 39.5°
|
|
|
Exposure 2:
1.2 GHz
Modulation type:
CW
Exposure duration:
until the temperature had risen from 38.5° to 39.5°
|
|
*The exposure was discontinued when the colonic temperature increased to 39.5°C and it was initiated again when the temperature returned to 38.5°C. This procedure was continued for 3 cycles
| Frequency | 1.2 GHz |
|---|---|
| Type | |
| Charakteristic | |
| Polarization | |
| Exposure duration | until the temperature had risen from 38.5° to 39.5° |
| Additional info | Animals were exposed in E orientation (long body axis of the animals parallel to the electric field) |
| Modulation type | CW |
|---|
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 1.7 m |
| Chamber | Eccosorb RF-shield anechoic chamber |
| Setup | Animals placed on a holder which consisted of seven 0.5 cm (outside diameter) Plexiglas rods mounted in a semicircular pattern on 4 cm x 6 cm Plexiglas plates (0.5 cm thick). |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power density | 20 mW/cm² | unspecified | measured | - | - |
| SAR | 8 W/kg | mean | calculated | whole body | ± 0.3 W/kg |
| Frequency | 1.2 GHz |
|---|---|
| Type | |
| Charakteristic | |
| Polarization | |
| Exposure duration | until the temperature had risen from 38.5° to 39.5° |
| Additional info | Animals were exposed in H orientation (long body axis of the animals parallel to the electric field) |
| Modulation type | CW |
|---|
| Exposure source |
|
|---|---|
| Distance between exposed object and exposure source | 1.7 m |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power density | 45 mW/cm² | - | measured | - | - |
| SAR | 8.1 W/kg | mean | calculated | whole body | ± 0.4 W/kg |
Exposure in E-orientation resulted in greater colonic, tympanic, left subcutaneous (side toward antenna), and tail heating. The findings indicated a more uniform distribution of heat than that which occurred in previous experiments of 2450-MHz irradiation in E- and H-orientation (publication 2239). A lack of significant differences in blood pressure and heart rate responses between exposures in the two orientations in this investigation suggest that greater peripheral heating, as observed in the earlier study of 2450 MHz, is necessary for these differences to occur.
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