[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-182207-105":3,"doc-detail-182207-en":85,"detail-sidebar-cat-0-en-105":102},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":78,"head_meta":80,"extra_data":82,"updated_unix":84},105,"en","vk3um-site-radiation-and-performance-calculator-vhf-shf","VK3UM Site Radiation and Performance Calculator - VHF-SHF","","This document details the VK3UM Site Radiation and Performance Calculator, focusing on VHF-SHF frequencies. It provides comprehensive data on transmission modes, transmitter power, transmission loss, parabolic reflector specifications, and yagi array configurations. The system performance calculator section outlines parameters such as frequency, path loss, T sky, Rx BW, diameter, mesh spacing, and system sensitivity including echo S/N and echo S/N. It also specifies radiation limits, far-field boundary, and on-axis exclusion zone. The document includes various settings for input parameters, such as frequency ranges (50 MHz to 48 GHz), transmitter power (up to 9000 Watts), and transmission loss (up to 10 dB). Additionally, it specifies details for parabolic reflectors (e.g., 9.5m diameter, 55% efficiency, 30 dBi gain) and yagi arrays (e.g., 16.8 dBi gain). Key performance indicators like peak EIRP and system sensitivity are presented, along with solar flux and LNA parameters. The included image shows the user interface of the calculator, featuring input fields, selection options, and graphical representations of performance metrics. The calculator appears to be a professional tool for radio communication engineers and enthusiasts to design and analyze system performance under various conditions.",{"@graph":14,"@context":77},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/vk3um-site-radiation-and-performance-calculator-vhf-shf/182207/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/vk3um-site-radiation-and-performance-calculator-vhf-shf/182207.png","ImageObject",300,407,{"name":42,"@type":43},"Aria Callaghan","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-07","2026-09-02",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",6,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69,73],{"name":60,"@type":61,"acceptedAnswer":62},"What is the frequency range covered by the VK3UM Site Radiation and Performance Calculator for VHF-SHF?","Question",{"text":63,"@type":64},"The calculator covers frequencies from 50 MHz up to 48 GHz.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"What are the key parameters for the parabolic reflector specified in the document?",{"text":68,"@type":64},"The document specifies a parabolic reflector with a diameter of 9.5 meters, an efficiency of 55%, a beam width of 5.12 degrees, and a dish gain of 30.07 dBi.",{"name":70,"@type":61,"acceptedAnswer":71},"What information is provided in the System Performance Calculator section?",{"text":72,"@type":64},"The System Performance Calculator section provides data on frequency, path loss, T Sky, receiver bandwidth, diameter, mesh spacing, system sensitivity, echo S/N, and echo S/N.",{"name":74,"@type":61,"acceptedAnswer":75},"What are the specified radiation limits and on-axis exclusion zone?",{"text":76,"@type":64},"The radiation limits are specified as 2.9 mW/cm² (far-field) and 0.3327 W/sq.m (bounded field), with an on-axis exclusion zone of 88.34 meters.","https://schema.org",{"og:url":32,"og:type":79,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":81,"canonical":32},"index,follow",{"doc_id":83,"site_id":7},182207,1790436189,{"code":4,"msg":86,"data":87},"success",{"doc_id":83,"user_id":88,"nickname":42,"user_avatar":89,"doc_module":4,"category_id":55,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":90,"file_id":91,"file_url":92,"file_type":93,"file_size":94,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":95,"language":96,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":97,"faqs":98,"seo_title":99,"seo_description":12,"update_tm":100,"read_time":101},962084926284,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","| Frequency | 432 MHz |\n| --- | --- |\n| Transmission mode duty factor | CW |\n| Six Minute average period | EME 2½ minutes |\n| Transmitter power | 1500 watts |\n| Transmission loss | 1.0 dB |\n| Parabolic Reflector | 9.5 metre |\n| Efficiency | 55% |\n| Single yagi gain | 16.8 dBi |\n| Number of yagis | 1 |\n| Diameter of mesh | 1.0 mm |\n| Mesh spacing | 12.7 mm |\n| Feed thru | 1 °K or-26.2dB (derived from mesh size) |\n| Receiver bandwidth | 120 Hz |\n| Solar Flux (10.7 cm) | 160 |\n| LNA Loss (preamp – antennae) | 0.10 dB |\n| LNA Noise figure | 0.60 dB |\n| LNA Gain | 26.0 dB |\n| LNA – Rx Loss (next stage) | 2.0 dB |\n| Rx NF (next stage following LNA) | 1.0 dB |\n| Spill over | 30 °K |\n| Radiation Limit Standard | FCC OET-65 (without Ground Reflection) . |\n| Transmission Mode Form Factor | CW (40%) note .. FCC = 100% |\n| Six Minute Period Average | EME 2½ min. (58.3%) note .. FCC = 100% |","cbCaieZYRRKd70Hq","https://ap.wps.com/l/cbCaieZYRRKd70Hq","pdf",372715,13,"English","# VHF-SHF\n# Transmitter Power\n# Parabolic Reflector\n# Yagi Array\n# System Performance Calculator","[{\"question\":\"What is the frequency range covered by the VK3UM Site Radiation and Performance Calculator for VHF-SHF?\",\"answer\":\"The calculator covers frequencies from 50 MHz up to 48 GHz.\"},{\"question\":\"What are the key parameters for the parabolic reflector specified in the document?\",\"answer\":\"The document specifies a parabolic reflector with a diameter of 9.5 meters, an efficiency of 55%, a beam width of 5.12 degrees, and a dish gain of 30.07 dBi.\"},{\"question\":\"What information is provided in the System Performance Calculator section?\",\"answer\":\"The System Performance Calculator section provides data on frequency, path loss, T Sky, receiver bandwidth, diameter, mesh spacing, system sensitivity, echo S/N, and echo S/N.\"},{\"question\":\"What are the specified radiation limits and on-axis exclusion zone?\",\"answer\":\"The radiation limits are specified as 2.9 mW/cm² (far-field) and 0.3327 W/sq.m (bounded field), with an on-axis exclusion zone of 88.34 meters.\"}]","VK3UM Site Radiation and Performance Calculator - VHF-SHF | PDF",1788347630,33,{"code":4,"msg":86,"data":103},[104,108,112,116,121,124,129,134,139,142,146],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":105,"show_sort_weight":106,"slug":107},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":113,"show_sort_weight":114,"slug":115},"Exam",70,"exam",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":118,"show_sort_weight":119,"slug":120},5,"Comic",60,"comic",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":122,"slug":123},50,"technology",{"id":125,"doc_module":4,"doc_module_name":25,"category_name":126,"show_sort_weight":127,"slug":128},7,"Healthcare",40,"healthcare",{"id":130,"doc_module":4,"doc_module_name":25,"category_name":131,"show_sort_weight":132,"slug":133},8,"Research & Report",30,"research-report",{"id":135,"doc_module":4,"doc_module_name":25,"category_name":136,"show_sort_weight":137,"slug":138},9,"Religion & Spirituality",20,"religion-spirituality",{"id":137,"doc_module":4,"doc_module_name":25,"category_name":140,"show_sort_weight":137,"slug":141},"World Cup","world-cup",{"id":143,"doc_module":4,"doc_module_name":25,"category_name":144,"show_sort_weight":143,"slug":145},10,"Lifestyle","lifestyle",{"id":147,"doc_module":4,"doc_module_name":25,"category_name":148,"show_sort_weight":117,"slug":149},19,"General","general"]