| 摘要 |
PURPOSE:To reduce power consumption, by controlling the power application to electric heating source for a radome, through the selection and reception of a signal interfered toward polarized wave side at a filter of reception side and detection of adhered ice/snow to the radome with the output state. CONSTITUTION:An input received at a parabola antenna 1 through a radome 2 with electric heater is separated into polarized waves in frequencies f1, f2, f3, f4 at a polarized wave brancher 3. The frequencies f1, f2, f3, f4 are branched at channel branchers 4a, 4b, 4d, 4e and outputted from output terminals 6a, 6b, 6d, 6e of receivers 5a, 5b, 5d, 5e. As to the frequency f4, cross polarized wave from the brancher 3 is branched at a channel brancher 4c, the output of cross polarized wave received at the receiver 5c is applied to a comparator 8, where the output is compared with the output of main polarized wave receivvied at the receiver 5e. If the output of cross polarized wave is more deteriorated than the preset value, a controller 9 supplying the power supply at a power supply input terminal 10 to the radome 2 is controlled and the power is supplied only at adhered ice/snow. |
