232 meters (elevation) in dimensions. The fresh new antenna include 1536 shown-discovered streams, which can be arranged for the twenty four articles (azimuth) and you can 64 rows (elevation), and marketed over 4 panels.
The effectiveness of the complete antenna comes by a couple of APUs (Antenna Energy Products), which distributed a power shuttle so you can four antenna boards and you will manage this new aperture configuration of the permitting or disabling the fresh new direct-current (DC) converter from inside the for each and every committee.
This new Antenna Program Tool (AIU) control most of the antenna ray building and steering functions by researching purchases throughout the electronics subsystem, interpreting the fresh new sales, and publishing the fresh new beam handle instructions to help you four boards regarding the kind of study shuttle. Brand new phase and you can get options of all of the level beams, and additionally 205 best-looking and you will 205 left-looking beams, is kept in AIU. The fresh new AIU receives the newest phase and acquire configurations of your own azimuth steering beam as from inside the-orbit calculation.
Giving Acquire and you will Circulator Equipment (TGCU) amplify brand new transmitting indicators acquired from electronic devices subsystem to drive new antenna, receive signals from the antenna, and you can post these to new electronic devices subsystem. Circulators are worried to separate the newest providing and receiving routes interfacing to your electronics subsystem. One or two TGCUs are widely used to push and you may receive from the antenna getting H and V polarization correspondingly.
New step 1:32 divider is positioned amongst the TRM calibration ports therefore the column calibration vent to spreading or blend H and V interior calibration signals
Whenever sending, new code waveform was increased of the Radio frequency (RF) energy amplifier and split from the a 1:dos divider within the TGCU to push the fresh new H or V polarization antenna. The selection of sending polarization can be easily used of the providing the newest related amp situated in TGCU. The new polarization number of antenna boards by the timing handle is even needed because can raise brand new cross-polarization separation.
The newest H otherwise V polarization signals received about A good and you can B boards was mutual, called HAB or VAB, and then split up into a couple of indicators, to help you setting redundant RF pathways to boost the machine accuracy, plus signals on C and you can D boards
A power cut-off drawing of just one antenna committee is provided during the Shape fifteen. At panel peak, RF interconnection between your columns plus the remaining radar is provided of the three identical 1:six electricity dividers. The brand new manage coach and power bus is delivered away from panel harbors so you can six line modules.
Brand new antenna try good modulated construction one describes a line while the a basic component, having its that Line Software Unit (CIU), that Line Electricity Tool (CPU), 7 Time delay Devices (TDU), sixteen Transmit-Located Segments (TRM), thirty-two twin-polarization radiators, three-power dividers, while the elevation planes shipping system.
At the column component peak, several step one:cuatro and one step one:thirty-two power dividers are widely used to interface the remainder of this new antenna panel from the RF highway. The brand new step one:4 divider directs H otherwise V signals into the TDU getting sign, and you may brings together the latest acquired signals regarding TDU slots into the H or V efficiency column RF slots.
Five Transmit-Found (TR) avenues was embedded in one TRM in just one to program having the newest TDU. Per plot radiator has actually H and you will V feeds, which can be entirely separate towards the sending and you may rule reception, and you will connects with a couple of TR streams inside H and you may V polarization, respectively.
A good waveguide slot radiator is employed to attenuate cross polarization and increase radiation overall performance. New chose line spacing of one’s radiator permits the fresh new antenna with a good ±20° browsing direction when you look at the elevation in place of pleasing grating lobes, which is adequate and necessary for within the browse direction specifications because of the a dozen observing settings, particularly Age form. not, line spacing of radiator is hard to suit the fresh new rigid conditions of lower grating lobes when it comes to a good ±step one.9° scanning perspective regarding azimuth requisite from the P function. Fortunately, the newest grating lobe is going to be leftover away from breaking down for the azimuth ambiguity because of the choosing the right PRF.
