why radio altimeter use 2 different antennas?

0 ⤊

why radio altimeter use 2 different antennas?

2007-01-17 02:47:15 · 3 answers · asked by meelindpaande 1 in Science & Mathematics ➔ Engineering

3 answers

One to transmit; one to receive. It's cheaper than putting in an expensive fast T/R switch to share the same antenna.

2007-01-17 02:51:12 · answer #1 · answered by Gene 7 · 0⤊ 0⤋

Altimeters are continuous wave (CW) radars. One antenna is the transmitter (high power), the other is the receiver(low power). Since its a CW radar, transmitter and receiver are not multiplexed (switcthed on and off alternately).

2007-01-19 12:02:27 · answer #2 · answered by vish 2 · 0⤊ 0⤋

i don't know. i am just answering and so i can get 2 points

2007-01-17 10:53:49 · answer #3 · answered by Anonymous · 0⤊ 0⤋