which include the main edges parallel to avoid the larger plane, angular, weapon system built, in addition One is the use of stealth coating, it can absorb radar waves irradiation to convert it into heat energy, thereby reducing the reflected waves, but these for VHF radars, the effects were relatively limited, work in VHF UHF band wavelength of about 1 about 10 meters, with modern combat aircraft similar size,[url=[第一私募论坛]http://www.simu001.cn]referenceweb.fr]giuseppe zanotti paris], so no backward scattering direction,[url=[第一私募论坛]http://www.simu001.cn]ecosearch.org/maison.asp?page=abercrombie-and-fitch-pas-cher/]abercrombie and fitch pas cher], increasing the aircraft's RCS, when there is exposure to the aircraft surface waves, will produce resonance,[url=[第一私募论坛]http://www.simu001.cn]emmedielle.it]hogan rebel], to have strengthened the role of the radar echo, This can increase the detection range of the radar. Stealth painted waves in general, I think that we want to achieve better stealth effect, stealth coating thickness wave irradiation is proportional to the wavelength of the radar,[url=[第一私募论坛]http://www.simu001.cn]grandhotelcrocedimalta.it]woolrich donna], according to the relevant domestic and international research suggests that this ratio is about illumination radar wavelength of 1 / 10-1 / 3, according to this ratio, if stealth coating on VHF radar has a good effect, then it needs to reach to a thickness of about 1-3 meters, which for high-speed aircraft or missile, it is almost impossible to achieve. In addition,[url=[第一私募论坛]http://www.simu001.cn]avocatpermispoint.fr]louboutin pas cher], there are other advantages of VHF radar, such as simple equipment,[url=[第一私募论坛]http://www.simu001.cn]baby-star.it]woolrich parka], high reliability, low demand for materials and processes, with some BVR capability, less interference by the waves, there is the more important point is that it is anti-radiation missile the ability, the size of the current anti-radiation missiles in the VHF radar wavelengths, so when VHF radar when exposure to anti-radiation missiles, will resonate.; \% {0 T9 r9 H& w: L0 a
in all weather conditions day or night, with complex terrain screening to attack, from this perspective, if you want to blow VHF radar, I'm afraid not need with stealth aircraft, sent the third-generation combat aircraft low altitude penetration aircraft drop bombs on it. There is accuracy, VHF radar for target detection range of error is larger, generally achieve km level, given that indicators Oriental -E reached about 300 m,[url=[第一私募论坛]http://www.simu001.cn]f-v-m.net/session.asp]zanotti pas cher], while it presents a rectangular radar antenna, showing velocity fan, Such errors in height may be greater and therefore unable to provide guidance directly fighter.
- C' [' h* {" L) X3 Q+ ^ the larger the antenna aperture is necessary in order to reduce the velocity width, in order to improve detection accuracy of radar, However,[url=[第一私募论坛]http://www.simu001.cn]aziendacalleri###/contenuto.asp]moncler outlet online], given the mobility,[url=[第一私募论坛]http://www.simu001.cn]ecosearch.org/maison.asp?page=abercrombie-paris/]abercrombie paris], cost and other factors, the aperture of the antenna can not too much, so VHF radar detection is generally low precision, another by multiple effect impact on land, the beam is easy to split, the lower detection performance of low altitude, there is The presence of a large number of civilian frequency communication device,[url=[第一私募论坛]http://www.simu001.cn]packtx.org/main.html]tienda nike], easy to interfere with each other. Clearly, the introduction of the East -E UHF phased array, by virtue of its strong anti-electronic jamming, anti-radiation missile capability, can effectively improve the early warning capacity Vie[url=[第一私募论坛]http://www.simu001.cn]freezer-seo.fr/tn/]tn]amese air defense systems, with the introduction of the new S-300PMU missiles phase cooperation can be further improved Vietnamese air defense system for air target strike capability.
: M, n2 C' E* n- Z) k( E3 ^0 F but to talk about Vietnam's air defense system with the ability to stealth aircraft restraint, I think this argument may not be comprehensive. Data Figure: Vietnam Air Force fighter Su 30MK2V become the size of more than 10 aircraft parking hangarAs mentioned above VHF radar although there are more advantages, but also very obvious shortcomings, the most obvious is the poor performance at low altitude from the radar design bureau's homepage presentation can be seen, the F-117A East -E have 350 km detection range, but the other side of the height of 10,000 meters,[url=[第一私募论坛]http://www.simu001.cn]accord-edu.it/]nike air max 2015], in other words,[url=[第一私募论坛]http://www.simu001.cn]delcros###/main.asp]chaussure louboutin pas cher], if the other party to reduce the height, then it is necessary to detect large distance decreases under the radar horizon formula, in fact,[url=[第一私募论坛]http://www.simu001.cn]freezer-seo.fr/nike-tn/]nike tn], along with terrain-following radar, flight control progressive system, low altitude penetration capability of modern combat aircraft has been greatly improved., J+ v. ?; J+ K, u! M
thereby improving VHF radar detection capability for anti-radiation missile , and by the elastomer space limitations, passive anti-radiation missile guidance system of modern small receiving antenna,[url=[第一私募论坛]http://www.simu001.cn]bccaltamarca.it/]roshe run nike], operating frequency 500MHZ or more generally, the work can not be achieved VHF radar 300MHZ, it can not attack VHF radar. Data Figure: Vie[url=[第一私募论坛]http://www.simu001.cn]praetorians.fr]tn]amese air defense forces were equipped with Russian-made S-300PMU2 long-range air defense missile system.Home Design Bureau under the radar data, the East -E UHF active phased array radar for this goal B-52, (the height of 10,[url=[第一私募论坛]http://www.simu001.cn]annuity.fr]louboutin soldes],000 meters, without interference) can reach to 360 km, F-117A stealth attack can be achieved with 350 km,[url=[第一私募论坛]http://www.simu001.cn]freezer-seo.fr/nike-tn-2014/]nike tn 2014], in the case if there is interference, the detection range of the former reduced to 255 km, while the F-117A to a significant decline to 47 km. China has also successfully developed a UHF active phased array radar, radar design bureau specialized in its home country to the east -E HK-JM radar and radar compared to this end, that the East -E radar superior to domestic radar,[url=[第一私募论坛]http://www.simu001.cn]francecloud.fr]chaussure giuseppe zanotti], For example, our HK-JM for this goal F-117A, at the height of 25,000 meters, without interference in order to provide 350 km detection range,[url=[第一私募论坛]http://www.simu001.cn]accord-edu.it/]tute nike], in addition to the precision should be less than the East -E radar, one scan error, domestic radar 300 m, while the East -E only 25 meters. But VHF radar also has its own disadvantages. First is the size of a large, poor mobility, we know radar detection range and antenna gain was directly proportional to the antenna gain is equal to the square of the wavelength of the antenna aperture except, that is, the greater the wavelength, antenna aperture increases necessary to ensure that the necessary gain, another point is the detection accuracy of the radar beam width depends on the wavelength of the larger.9 `, [8 Q4 b6 u0 @0 P* X8 y# _
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