Brand new SAR payload employs good deployable planar energetic phased range antenna that is fifteen meters (azimuth) x step 1
232 m (elevation) in size. This new antenna consists of 1536 shown-discovered avenues, that are planned when you look at the 24 articles (azimuth) and you will 64 rows (elevation), and you may distributed more than 4 boards.
The power of the complete antenna comes by a couple of APUs (Antenna Fuel Gadgets), and therefore spread an electrical energy coach to four antenna boards and you may manage this new aperture configuration from the enabling or disabling the fresh direct-current (DC) converter inside the for each panel.
The new Antenna Interface Product (AIU) control the antenna ray developing and you will direction functions by receiving instructions on electronic devices subsystem, interpreting the brand new commands, and you may posting the latest ray manage orders to five boards about brand of analysis bus. The stage and you will gain configurations of the many height beams, also 205 best-lookin and 205 remaining-searching beams, are stored in AIU. This new AIU get the fresh new stage and obtain configurations of the azimuth direction beam by means of in the-orbit formula.
Providing Obtain and you will Circulator Tools (TGCU) amplify the newest providing indicators gotten out of electronic devices subsystem to get the latest antenna, found indicators on antenna, and upload these to the newest electronics subsystem. Circulators are worried to separate the fresh new sending and receiving paths interfacing for the electronics subsystem. A couple of TGCUs are widely used to drive and discovered in the antenna to own H and you will V polarization correspondingly.
This new step 1:thirty-two divider is positioned involving the TRM calibration harbors and column calibration vent so you can distributed otherwise mix H and you will V internal calibration indicators
Whenever transmitting, the brand new laws waveform are amplified by the Radio-frequency (RF) power amp and you may separated of the a-1:2 divider inside the TGCU to operate a vehicle the H or V polarization antenna. Read more