Millimeter-wave Radar
\nIn recent years, millimeter-wave technology has made significant breakthroughs in the development of transmitters, receivers, antennas and millimeter-wave devices as the demand for millimeter-wave systems continues to grow, and millimeter-wave radar has entered a new phase of diverse… Applications.
\nSince the 1980s, the increasing demand for millimeter-wave radar has set off a boom in the development of millimeter-wave radar, which depends on the following characteristics of millimeter-wave radar:
\n\u2460 Extremely wide bandwidth, which is suitable for a variety of broadband signal processing;
\n\u2461 Narrow beams can be obtained with small antenna aperture, good directionality, very high spatial resolution, and high tracking accuracy;
\n\u2462 Wide Doppler bandwidth, obvious Doppler effect, Doppler resolution good, high accuracy of velocity measurement;
\n\u2463 small influence of ground clutter and multipath effect, good tracking performance at low altitude;
\n\u2464 millimeter-wave scattering characteristics of the target shape details are sensitive, so it can improve the ability of multi-target discrimination and target identification and imaging quality;
\n\u2465 due to the millimeter-wave radar transmitting a narrow beam, the enemy is difficult to intercept in electronic countermeasurement;
\n\u2466 the current stealth aircraft and other targets are designed to be limited to the range of stealth frequencies from 1 ~ 20GHz, and due to the airframe, the stealth frequency range is limited to 1~20GHz, the stealth frequency range is limited to 1~20GHz. 20GHz, and because the fuselage and other uneven parts are more obvious than millimeter waves, these unevenness will cause angular reflection, thus increasing the effective reflection area, so millimeter-wave radar has a certain anti-stealth function;
\n\u2467 compared with laser and infrared, millimeter-wave does not have the latter’s high-resolution, but has the ability to penetrate smoke and dust and fog, and can be all-weather work.
\nMillimeter-wave radar disadvantage is mainly affected by atmospheric attenuation and absorption, the current scope of action is mostly limited to within 10 kilometers. In addition, compared with microwave radar, the components of millimeter-wave radar are currently in the mass production stage, with a lower yield rate. In addition, the yield rate of millimeter-wave radar components is lower than that of microwave radar. In addition, many devices require gold or silver plating in the millimeter wave band, so the cost of the devices is higher.<\/p>\n
Millimeter-wave antenna
\n\u2460 Horn antenna
\nThe general opening waveguide of a conical horn can radiate electromagnetic waves, but due to the small aperture, the radiation efficiency and gain are low. If the opening of the metal waveguide is gradually expanded and extended, a horn antenna is formed. Horn antennas are widely used in microwave and millimeter wave bands due to their simple structure, wide frequency band, easy manufacturing
\nand easy adjustment. It is also widely used in millimeter wave therapeutic instruments.
\n\u2461 Microstrip Antennas
\nMicrostrip antennas or printed antennas were first widely used in the centimeter band and then expanded to the millimeter band. This expansion is not a proportional reduction by wavelength, not an exact imitation, but a new concept and a new development.
\nHowever, there are two key problems with millimeter-wave microstrip antennas. One is that the loss in the transmission line becomes larger, and the other is that the dimensional tolerances become very tight.
\n\u2462 Leakage wave antenna
\nThis type of antenna radiates energy due to some discontinuities in the electromagnetic wave as it propagates along an open structure, hence the name leakage wave antenna.<\/p>","protected":false},"excerpt":{"rendered":"
XWR6843 Millimeter Wave Sensor PCBA Assembly<\/p>\n
Name:FR4 PCB Substrate Assembly
\nWide Field of View Antenna: Azimuth FOV 120\u00b0, Elevation FOV 80\u00b0 Discrete DCDC Power Management Solution Loose PCB Rule: Reduced Manufacturing Costs
\n– No microvias, only through-holes
\nNo vias on BGA pads
\nSerial port for on-board QSPI flash programming
\n60-pin high-density (HD) connector for raw analog-to-digital converter (ADC) data transfer via LVDS: on-board CAN-FD transceiver; USB-powered stand-alone mode of operation<\/p>","protected":false},"featured_media":1579,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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Millimeter Wave Sensor PCBA Assembly Name:FR4 PCB Substrate Assembly Wide Field of View Antenna: Azimuth FOV 120\u00b0, Elevation FOV 80\u00b0 Discrete DCDC Power Management Solution Loose PCB Rule: Reduced Manufacturing Costs - No microvias, only through-holes No vias on BGA pads Serial port for on-board QSPI flash programming 60-pin high-density (HD) connector for raw…","_links":{"self":[{"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product\/1577","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/comments?post=1577"}],"version-history":[{"count":1,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product\/1577\/revisions"}],"predecessor-version":[{"id":1583,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product\/1577\/revisions\/1583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/media\/1579"}],"wp:attachment":[{"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/media?parent=1577"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product_brand?post=1577"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product_cat?post=1577"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/fabpcb.com\/zh_cn\/wp-json\/wp\/v2\/product_tag?post=1577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}