232 yards (elevation) in size. New antenna contains 1536 aired-located avenues, which can be prepared during the twenty four columns (azimuth) and you may 64 rows (elevation), and distributed more cuatro boards.
The power of the entire antenna is supplied by one or two APUs (Antenna Power Tools), and that dispersed a power coach in order to four antenna panels and you can handle the fresh new aperture setup because of the enabling otherwise disabling brand new direct-current (DC) converter when you look at the for each and every committee.
The new Antenna Interface Unit (AIU) regulation all of the antenna beam developing and you can steering functions acquiring orders regarding the electronic devices subsystem, interpreting the fresh new commands, and you may submitting brand new beam handle purchases so you’re able to five panels about types of investigation bus. The fresh stage and you may get configurations of all the level beams, in addition to 205 best-appearing and you can 205 kept-appearing beams, is actually stored in AIU. The brand new AIU gets the stage and you may acquire options of one’s azimuth direction beam as in-orbit calculation.
Providing Acquire and you will Circulator Units (TGCU) amplify new sending signals obtained regarding electronic devices subsystem to operate a vehicle the latest antenna, receive indicators on antenna, and post them to the new electronic devices subsystem. Circulators are involved to separate the new shipping and receiving pathways interfacing towards the electronics subsystem. A couple of TGCUs are used to drive and you may located on antenna getting H and you can V polarization respectively.
This new 1:thirty two divider is placed between the TRM calibration slots and the column calibration vent to help you distribute otherwise merge H and you can V interior calibration indicators
Whenever providing, the signal waveform was increased from the Radio frequency (RF) fuel amplifier and you may split of the a-1:2 divider from inside the TGCU to push the fresh H or V polarization antenna. The selection of shipping polarization can be simply used from the enabling the fresh new involved amp based in TGCU. This new polarization number of antenna panels because of the timing manage is additionally required whilst can enhance the new get across-polarization isolation.
The brand new H otherwise V polarization indicators gotten regarding An excellent and you may B panels is mutual, entitled HAB or VAB, following split into a couple signals, to setting redundant RF paths to boost the computer accuracy, as well as indicators from the C and D boards
An electric block diagram of a single antenna committee is given in Profile 15. During the panel level, RF interconnection between the columns plus the remaining portion of the radar is provided by the three the same step 1:six stamina dividers. New handle shuttle and power shuttle try distributed out of panel harbors so you’re able to half a dozen line segments.
The newest antenna is a beneficial modulated design you to talks of a line due to the fact a standard module, which consists of one Line Program Equipment (CIU), one to Column Fuel Product (CPU), https://kissbrides.com/italian-women/marsala/ eight Time-delay Equipment (TDU), 16 Transmitted-Discover Modules (TRM), 32 twin-polarization radiators, three power dividers, as well as the height flat shipments community.
On line module peak, one or two step 1:cuatro and something step 1:thirty-two stamina dividers are used to interface the rest of the antenna committee on RF roadway. The newest 1:cuatro divider directs H otherwise V indicators into the TDU to own sign, and you can brings together this new acquired signals throughout the TDU ports on H or V productivity line RF ports.
Four Transmitted-Receive (TR) channels try inserted in a single TRM in just you to program having the latest TDU. Per area radiator has actually H and you may V feeds, that are completely independent on the shipping and you can laws lobby, and you can connects which have a couple TR channels inside H and you will V polarization, correspondingly.
An effective waveguide slot radiator is utilized to reduce cross polarization and you can raise rays efficiency. The brand new selected line spacing of your radiator allows the fresh new antenna having a ±20° scanning position inside the height in the place of exciting grating lobes, that is adequate and you can very important to covering the research position criteria because of the twelve watching methods, particularly Elizabeth means. not, line spacing of radiator is tough to match this new rigid requirements away from low grating lobes in the case of a ±step one.9° learning direction on the azimuth expected of the P setting. Luckily for us, brand new grating lobe will be kept regarding wearing down into the azimuth ambiguity from the choosing the proper PRF.