HeIMDALL R7 receiver
Introduction
The HeIMDALL R7 receiver is the completed version of a receiver system described here:heimdall_r2. Please find there the detailed description of the system architecture.
Preparation of the hardware
You can find bellow some pictures made during the assemble and the development of this coherent receiver.
Coherent receiver is ready to assemble
RTL-SDR dongles are waiting for the installation.
RTL-SDR receivers are in place.
After the SDRs have been installed. The RF front modules are prepared.
Population of the RF front module components
RF front module preparation in progress.
RF front PCBs are almost in a ready state.
Enclosure of the radar with open up.
All the PCBs are in position.
Bring up of the Analog Direct-Path Interference Supression
Measurement of the transfer function
On tht top the used RF generator, and on the bottom the specturm analyzer can be seen.
Measured transfer of the LNA and the band pass filter
Fully assembled and wired radar
Completed HR7 reeiver
{"items":["8c9a6392-18ad-4b63-b401-213099238a89","413fcb29-62ca-450c-ade8-4243b9990209","ad220da8-164f-4f65-bfd1-def39e36de7f","205cd526-32eb-48f8-9649-14aed9559743","a0a3b01c-aa3a-4470-ab58-41e1727132e5","79246d30-fd16-40a4-a2a6-627dcd02195d","38632e2b-e2a1-46d4-b8f8-c4c77bf1eb69","6c80f93d-671b-4c13-b25c-c4b9afd0b500","d93973c3-f906-44dd-a6b6-ff182b8f2e4d","9f352c87-620d-47a7-8937-802f2fb69399","2adc7d23-9b81-48f1-81b1-fff4bde01d9b","0adf3b11-e1d6-4314-b1c5-4670134b46d6"],"styles":{"groupSize":3,"showArrows":true,"cubeImages":false,"cubeType":"fill","cubeRatio":1,"isVertical":true,"gallerySize":550,"collageAmount":0.8,"collageDensity":1,"groupTypes":"1,2h,2v,3t,3b,3l,3r","oneRow":false,"imageMargin":2.5,"galleryMargin":0,"floatingImages":0,"chooseBestGroup":true,"smartCrop":false,"hasThumbnails":false,"enableScroll":true,"isGrid":false,"isSlider":false,"isColumns":false,"isSlideshow":false,"cropOnlyFill":false,"fixedColumns":0,"enableInfiniteScroll":true,"isRTL":false,"minItemSize":120,"rotatingGroupTypes":"","rotatingCubeRatio":"","gallerySliderImageRatio":1.7777777777777777,"numberOfImagesPerRow":3,"numberOfImagesPerCol":1,"groupsPerStrip":0,"borderRadius":0,"boxShadow":0,"gridStyle":0,"mobilePanorama":false,"placeGroupsLtr":false,"viewMode":"preview","thumbnailSpacings":5,"galleryThumbnailsAlignment":"bottom","isMasonry":false,"isAutoSlideshow":false,"slideshowLoop":false,"autoSlideshowInterval":4,"useCustomButton":false,"bottomInfoHeight":0,"titlePlacement":"SHOW_ON_HOVER","galleryHorizontalAlign":"center","galleryTextAlign":"center","galleryVerticalAlign":"center","scrollSnap":false,"itemClick":"expand","fullscreen":true,"allowSocial":false,"allowDownload":false,"allowTitle":true,"allowDescription":true,"loveButton":true,"loveCounter":false,"videoPlay":"hover","scrollAnimation":"NO_EFFECT","scrollDirection":0,"overlayAnimation":"NO_EFFECT","arrowsPosition":0,"arrowsSize":23,"watermarkOpacity":40,"watermarkSize":40,"useWatermark":true,"watermarkDock":{"top":"auto","left":"auto","right":0,"bottom":0,"transform":"translate3d(0,0,0)"},"loadMoreAmount":"all","defaultShowInfoExpand":1,"allowTitleExpand":true,"allowDescriptionExpand":true,"allowLinkExpand":true,"expandInfoPosition":0,"allowFullscreenExpand":true,"fullscreenLoop":false,"galleryAlignExpand":"left","addToCartBorderWidth":1,"addToCartButtonText":"","slideshowInfoSize":200,"playButtonForAutoSlideShow":false,"allowSlideshowCounter":false,"hoveringBehaviour":"NO_CHANGE","thumbnailSize":120,"magicLayoutSeed":1,"imageHoverAnimation":"NO_EFFECT","calculateTextBoxHeightMode":"AUTOMATIC","calculateTextBoxWidthMode":"PERCENT","textBoxHeight":0,"textBoxWidth":200,"textBoxWidthPercent":50,"textImageSpace":10,"textBoxBorderRadius":0,"textBoxBorderWidth":0,"textsVerticalPadding":0,"textsHorizontalPadding":0,"titleDescriptionSpace":6,"customButtonText":"","customButtonBorderWidth":1,"customButtonBorderRadius":0,"loadMoreButtonText":"Load More","loadMoreButtonBorderWidth":1,"loadMoreButtonBorderRadius":0,"imageInfoType":"NO_BACKGROUND","itemBorderWidth":0,"itemBorderRadius":0,"itemEnableShadow":false,"itemShadowBlur":20,"itemShadowDirection":135,"itemShadowSize":10,"imageLoadingMode":"BLUR","expandAnimation":"NO_EFFECT","imageQuality":90,"usmToggle":false,"usm_a":0,"usm_r":0,"usm_t":0,"videoSound":false,"videoSpeed":1,"videoLoop":true,"gotStyleParams":true,"selectedLayout":"0|bottom|1|fill|true|0|true","showVideoPlayButton":true,"galleryImageRatio":2,"sharpParams":{"quality":90,"usm":{}},"imageLoadingWithColorMode":"PICKED_COLOR","imageRatioType":"FIXED","numberOfDisplayedItems":3,"itemBorderColor":{"themeName":"color_15","value":"rgba(0,0,0,1)"},"itemShadowOpacityAndColor":{"themeName":"color_15","value":"rgba(0,0,0,0.2)"},"textBoxBorderColor":"color-5","textBoxFillColor":"color-2","alwaysShowHover":false,"isStoreGallery":false,"previewHover":false,"galleryLayout":0,"itemOpacity":{"themeName":"color_14","value":"rgba(130,130,130,0.6)"},"itemFont":{"style":{"bold":false,"italic":false,"underline":false},"family":"din-next-w01-light","preset":"Heading-S","editorKey":"font_6","size":18,"fontStyleParam":true,"displayName":"Small Heading","value":"font:normal normal normal 18px/1.3em din-next-w01-light,din-next-w02-light,din-next-w10-light,sans-serif;"},"itemFontSlideshow":{"family":"avenir-lt-w01_85-heavy1475544","displayName":"Basic Heading","style":{"bold":false,"italic":false,"underline":false},"size":22,"preset":"Custom","editorKey":"font_5","fontStyleParam":true,"value":"font:normal normal normal 22px/27px avenir-lt-w01_85-heavy1475544,sans-serif;"},"itemDescriptionFontSlideshow":{"family":"avenir-lt-w01_35-light1475496","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":15,"preset":"Custom","editorKey":"font_8","fontStyleParam":true,"value":"font:normal normal normal 15px/18px avenir-lt-w01_35-light1475496,sans-serif;"},"itemDescriptionFont":{"family":"avenir-lt-w01_35-light1475496","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":15,"preset":"Custom","editorKey":"font_8","fontStyleParam":true,"value":"font:normal normal normal 15px/18px avenir-lt-w01_35-light1475496,sans-serif;"},"itemFontColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"itemFontColorSlideshow":{"themeName":"color_15","value":"rgba(0,0,0,1)"},"itemDescriptionFontColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"itemDescriptionFontColorSlideshow":{"themeName":"color_15","value":"rgba(0,0,0,1)"},"loadMoreButtonFont":{"family":"helvetica-w01-light","displayName":"Paragraph 2","style":{"bold":false,"italic":false,"underline":false},"size":18,"preset":"Body-M","editorKey":"font_8","fontStyleParam":true,"value":"font:normal normal normal 18px/1.4em helvetica-w01-light,helvetica-w02-light,sans-serif;"},"loadMoreButtonFontColor":{"themeName":"color_15","value":"rgba(0,0,0,1)"},"loadMoreButtonColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"loadMoreButtonBorderColor":{"themeName":"color_15","value":"rgba(0,0,0,1)"},"arrowsColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"oneColorAnimationColor":{"themeName":"color_11","value":"rgba(255,255,255,1)"},"responsive":false,"modifiedGallerySize":true,"isAccessible":false,"allowLeanGallery":false,"layoutsVersion":2,"selectedLayoutV2":0,"isSlideshowFont":false,"externalInfoHeight":0,"externalInfoWidth":0},"container":{"top":"","bottom":"","left":"","right":"","width":980,"height":715,"position":"","avoidGallerySelfMeasure":true,"galleryWidth":985,"galleryHeight":715,"scrollBase":0}}