Talk:Active electronically scanned array

message: There is a report in Strategy Pages defence news about the airborne AESA for the F16 class J10A indigenous fighter.
http://www.strategypage.com/htmw/htecm/articles/20070817.aspx
" Chinese Deploy Superior Avionics
August 17, 2007: China is touting the advanced electronics in their new J10A fighter. The J10A is using an Active Electronically Scanned Array (AESA) radar. AESA systems consist of thousands of tiny radars that make it possible to track many different targets simultaneously.  China claims the J10A radar can track ten targets at once, and attack four of them simultaneously (with long range missiles). China has revealed other military AESA radars recently, indicating years of intense research and development in this area.
"The J10 is also Chinese made. It looks something like the American F-16, and weighs about the same (19 tons). Like the F-16, and unlike the Su-27, the J10 has only one engine. Originally, the J10 used a Russian AL-31FN engine, but China has been working for a decade to manufacture their own version of this, the WS10A.
"It's no accident that the J10 resembles the F-16, because Israel apparently sold them technology for the Israeli Lavi jet fighter. Israel abandoned the Lavi project, because of the high cost and availability of cheaper alternatives (buying F-16s and F-15s from the United States.) But the Lavi was meant to be a super F-16, and incorporated a lot of design ideas from the F-16 (which the Israelis were very familiar with, as they used them, and had developed new components for them.) China has about a dozen J10As in service, and will probably increase production once their WS10A engine is operational (which may be in a year or two.) China's extensive espionage efforts in the U.S. has long sought jet engine and AESA technology.
81.86.144.210 11:36, 18 August 2007 (UTC)
thread_title: Chinese AESA?

message: Should the article not cover that this kind of radar is capable of being active even though ground based radar detectors is nearby. This can be done if the location of ground stations is known, and when turning active radar on, no radar ray will be sent in the direction of the known positions of those radar detection stations, in effect leaving holes of no rays. Sorry for explaining this so cumbersome, hope you get the point. -- A human 18:09, 17 January 2006 (UTC)
replies: text: If I understand you correctly, you mean the feature to not scan each area with the same amount of energy (or some not at all), right? This is not restricted to AESAs, not even electronically scanned arrays. Mechanically scaning radars can also do this. 19:12, 17 January 2006 (UTC)
replies: text:  Oh, I didn't know that. Thanks for the clearification. -- A human 00:33, 18 January 2006 (UTC)
thread_title:  Active scanning with holes 

message: Probably needs to be merged in here. Any objections? CP/M comm |Wikipedia Neutrality Project| 18:04, 22 September 2006 (UTC)
replies: text: Although the photos are the same, I think the referenced APAR article refers to a specific AESA system. Engineer Bob 23:44, 5 October 2006 (UTC)
replies: text:  Engineer Bob is correct, basically. While the term "active phased array radar" can be considered a generic term, AESA is an equivalent generic term whose usage has been in the ascendancy. The term "Active Phased Array Radar (APAR)" is the actual name of a specific active phased array radar (or AESA, if you prefer). Therefore, I think the page referring to APAR should remain as a reference to the APAR product, and should simply link to the generic page on AESAs. TheOriginalMagicMonkey 21:12, 7 October 2006 (UTC)
replies: text:  I've made some edits to the APAR page in order to add information but also to make it clear that it is a specific instance of an AESA. I feel strongly that the two pages should not be merged. TheOriginalMagicMonkey 22:32, 7 October 2006 (UTC)

text:  (was edit conflict) While I for multiple times heard of APAR as a generic term, let it be this way, as it's better than redirect and dab title. Removed tags. I'll add dab into the (other) article. CP/M comm |Wikipedia Neutrality Project| 22:37, 7 October 2006 (UTC)
thread_title:  Merge [[Active Phased Array Radar]] 

message: how is the gain higher for an aesa compared to a phased array? 59.92.156.36 13:46, 27 February 2007 (UTC)
thread_title:  Increased gain 

message: If i where to sort the varius radars, should I sort by designation or, as seems more logical, by manufacturer. Johan G (talk) 02:45, 1 March 2009 (UTC)
thread_title:  Sorting links to radars 

message: I suggest a higher resolution image. The link below contain pictures of an AESA radar on an Australian ship and are of a superior resolution. 
http://images.navy.gov.au/fotoweb/Grid.fwx?archiveid=5000&columns=4&position=1&rows=2&search=HMAS%20Perth%20and%20Phased%20Array%20and%20%28FQYFD%20contains%2820101018~~20101122%29%29&sorting=ModifiedTimeAsc
Also noting that APAR actually stands for Active Electronically Scanned Array, this might remove some confusion from this article.
Cheers,  — Preceding unsigned comment added by Streddy (talk • contribs) 06:34, 22 December 2010 (UTC)
thread_title:  Hi resolution image? 

message: I call bullshit on the 'code injection' limitations of AESA radars. The article was clearly written by someone with little understanding of such techniques. Even if a buffer overflow vulnerability would exist (extremely unlikely), it would be a simple firmware fix.  — Preceding unsigned comment added by 83.227.9.105 (talk) 11:05, 12 April 2012 (UTC)
thread_title:  Code injection 

message: "Receiver electronics were also large due to the high frequencies that they worked with."
There's nothing about high frequencies that requires large electronics. Clarification definitely needed.  — Preceding unsigned comment added by 50.46.146.86 (talk) 23:45, 24 June 2012 (UTC)
thread_title:  Receiver size? 

message: In the section under 'Advantages' titled 'Low Probability of Intercept', the claim is made that the return signal follows the inverse square law, after which the author suggests this means the return signal drops with four times the square of the distance.
This did not sit right with me, so I checked the reference provided.  The reference says that the return signal drops with the 4th power of the distance.  
The reference then gives an example comparing twice the distance yielding 1/16th the return signal....which is most likely where the 'four times the square of the distance' figure was generated.
The 4th power is not the same as 4 times the square unless the change being discussed is doubling.
This should be corrected and the remainder of what this writer has added to Wikipedia checked for basic math errors.
70.185.104.164 (talk) 07:11, 7 June 2013 (UTC)
thread_title:  Poor understanding of basic math. 

message: "They improve on the older passive electronically scanned radars by spreading their signal emissions out across a band of frequencies, which makes it very difficult to detect over background noise." I know there are radars that exist that transmit over a very wide bandwidth, to make them hard to detect, but I don't believe this in an inherent feature of an AESA radar, and that it's just something you can put into an advanced radar system to improve it. The way the article is written at the moment, it seems to indicate that all AESA radars operate like this, which I don't believe is the case. But, I am no radar expert and could be wrong. Does anyone who actually knows about radars, know whether the article is right or wrong? Hammerfrog (talk) 16:43, 28 August 2013 (UTC)
thread_title:  Some clarification please 

message: This phrase is unclear: "Unlike the PESA, where the signal is generated at single frequencies by a small number of transmitters, in the AESA each module generates and radiates its own independent signal." Specifically, is the statement meant to imply that the signal source (oscillator plus modulator or DREX) is in the AESA TR module? If so, does it not lose the phase coherency that is required to reconstruct the return signals? Can you provide a reference for this as the ones I found do not make this implication, see http://www.globalsecurity.org/military/systems/aircraft/systems/an-apg-aesa.htm. At best, this seems to be an evolving technique and not definitional to AESA, see: http://www.dodsbir.net/sitis/archives_display_topic.asp?Bookmark=43314.  (Additional comment removed as redundant to one above) Dave
204.186.81.254 (talk) 15:30, 5 January 2015 (UTC)
thread_title:  AESA TR module and capabilities 

message: An AESA is not a "type of phased array radar", it is a type of antenna that is commonly used in radar systems but which may be used for other applications.  I suggest the article would probably be better if it described the antenna technology in more generic terms and then discussed its application to radar, communications, EW, etc. NickNak (talk) 16:45, 5 April 2015 (UTC)
thread_title:  AESA is an antenna technology, not a type of radar 

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