وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
content_cookies111:string(1707) "{"id":65138,"content_cookies":null,"user_header":{"SERVER_SOFTWARE":"Apache\/2.4.52 (Debian)","REQUEST_URI":"\/technodad\/%D8%A7%D9%84%D8%B7%D9%8A%D9%81-%D8%A7%D9%84%D8%B1%D8%A7%D8%AF%D9%8A%D9%88%D9%8A\/","REDIRECT_STATUS":"200","HTTP_X_FORWARDED_PROTO":"https","HTTP_CONNECTION":"upgrade","HTTP_HOST":"technologyreview.ae","HTTP_CF_CONNECTING_IP":"44.200.101.84","HTTP_CF_IPCOUNTRY":"US","HTTP_ACCEPT_ENCODING":"gzip","HTTP_CF_RAY":"80ffcb63ee6b7fc3-IAD","HTTP_CF_VISITOR":"{\\\"scheme\\\":\\\"https\\\"}","HTTP_USER_AGENT":"CCBot\/2.0 (https:\/\/commoncrawl.org\/faq\/)","HTTP_ACCEPT":"text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8","HTTP_ACCEPT_LANGUAGE":"en-US,en;q=0.5","HTTP_CDN_LOOP":"cloudflare","PATH":"\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/sbin:\/bin","SERVER_SIGNATURE":"Apache\/2.4.52 (Debian) Server at technologyreview.ae Port 80<\/address>\n","SERVER_NAME":"technologyreview.ae","SERVER_ADDR":"172.18.0.22","SERVER_PORT":"80","REMOTE_ADDR":"44.200.101.84","DOCUMENT_ROOT":"\/var\/www\/html","REQUEST_SCHEME":"http","CONTEXT_PREFIX":"","CONTEXT_DOCUMENT_ROOT":"\/var\/www\/html","SERVER_ADMIN":"webmaster@localhost","SCRIPT_FILENAME":"\/var\/www\/html\/index.php","REMOTE_PORT":"54200","REDIRECT_URL":"\/technodad\/\u0627\u0644\u0637\u064a\u0641-\u0627\u0644\u0631\u0627\u062f\u064a\u0648\u064a\/","GATEWAY_INTERFACE":"CGI\/1.1","SERVER_PROTOCOL":"HTTP\/1.1","REQUEST_METHOD":"GET","QUERY_STRING":"","SCRIPT_NAME":"\/index.php","PHP_SELF":"\/index.php","REQUEST_TIME_FLOAT":1696279583.586135,"REQUEST_TIME":1696279583,"argv":[],"argc":0,"HTTPS":"on"},"user_ip":"44.200.101.84","user_agent":"CCBot\/2.0 (https:\/\/commoncrawl.org\/faq\/)"}"
check_post_to_show:object(stdClass)#29417 (13) { ["is_valid"]=> int(1) ["global_remaining_posts_to_view"]=> int(0) ["remaining_posts_to_view"]=> int(0) ["number_all_post"]=> int(0) ["number_post_read"]=> int(0) ["exceeded_daily_limit"]=> int(0) ["is_watched_before"]=> int(0) ["user_agent"]=> string(40) "CCBot/2.0 (https://commoncrawl.org/faq/)" ["user_ip"]=> string(13) "44.200.101.84" ["user_header"]=> object(stdClass)#29425 (40) { ["SERVER_SOFTWARE"]=> string(22) "Apache/2.4.52 (Debian)" ["REQUEST_URI"]=> string(91) "/technodad/%D8%A7%D9%84%D8%B7%D9%8A%D9%81-%D8%A7%D9%84%D8%B1%D8%A7%D8%AF%D9%8A%D9%88%D9%8A/" ["REDIRECT_STATUS"]=> string(3) "200" ["HTTP_X_FORWARDED_PROTO"]=> string(5) "https" ["HTTP_CONNECTION"]=> string(7) "upgrade" ["HTTP_HOST"]=> string(19) "technologyreview.ae" ["HTTP_CF_CONNECTING_IP"]=> string(13) "44.200.101.84" ["HTTP_CF_IPCOUNTRY"]=> string(2) "US" ["HTTP_ACCEPT_ENCODING"]=> string(4) "gzip" ["HTTP_CF_RAY"]=> string(20) "80ffcb63ee6b7fc3-IAD" ["HTTP_CF_VISITOR"]=> string(22) "{\"scheme\":\"https\"}" ["HTTP_USER_AGENT"]=> string(40) "CCBot/2.0 (https://commoncrawl.org/faq/)" ["HTTP_ACCEPT"]=> string(63) "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" ["HTTP_ACCEPT_LANGUAGE"]=> string(14) "en-US,en;q=0.5" ["HTTP_CDN_LOOP"]=> string(10) "cloudflare" ["PATH"]=> string(60) "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ["SERVER_SIGNATURE"]=> string(79) "Apache/2.4.52 (Debian) Server at technologyreview.ae Port 80" ["SERVER_NAME"]=> string(19) "technologyreview.ae" ["SERVER_ADDR"]=> string(11) "172.18.0.22" ["SERVER_PORT"]=> string(2) "80" ["REMOTE_ADDR"]=> string(13) "44.200.101.84" ["DOCUMENT_ROOT"]=> string(13) "/var/www/html" ["REQUEST_SCHEME"]=> string(4) "http" ["CONTEXT_PREFIX"]=> NULL ["CONTEXT_DOCUMENT_ROOT"]=> string(13) "/var/www/html" ["SERVER_ADMIN"]=> string(19) "webmaster@localhost" ["SCRIPT_FILENAME"]=> string(23) "/var/www/html/index.php" ["REMOTE_PORT"]=> string(5) "54200" ["REDIRECT_URL"]=> string(39) "/technodad/الطيف-الراديوي/" ["GATEWAY_INTERFACE"]=> string(7) "CGI/1.1" ["SERVER_PROTOCOL"]=> string(8) "HTTP/1.1" ["REQUEST_METHOD"]=> string(3) "GET" ["QUERY_STRING"]=> NULL ["SCRIPT_NAME"]=> string(10) "/index.php" ["PHP_SELF"]=> string(10) "/index.php" ["REQUEST_TIME_FLOAT"]=> float(1696279583.5861) ["REQUEST_TIME"]=> int(1696279583) ["argv"]=> array(0) { } ["argc"]=> int(0) ["HTTPS"]=> string(2) "on" } ["content_user_category"]=> string(4) "paid" ["content_cookies"]=> object(stdClass)#29423 (3) { ["status"]=> int(0) ["sso"]=> object(stdClass)#29426 (2) { ["content_id"]=> int(44231) ["client_id"]=> string(36) "1d1883f4-87d0-4156-8903-e6ceb0cb4224" } ["count_read"]=> NULL } ["is_agent_bot"]=> int(1) }
check_post_to_show:object(stdClass)#29417 (13) { ["is_valid"]=> int(1) ["global_remaining_posts_to_view"]=> int(0) ["remaining_posts_to_view"]=> int(0) ["number_all_post"]=> int(0) ["number_post_read"]=> int(0) ["exceeded_daily_limit"]=> int(0) ["is_watched_before"]=> int(0) ["user_agent"]=> string(40) "CCBot/2.0 (https://commoncrawl.org/faq/)" ["user_ip"]=> string(13) "44.200.101.84" ["user_header"]=> object(stdClass)#29425 (40) { ["SERVER_SOFTWARE"]=> string(22) "Apache/2.4.52 (Debian)" ["REQUEST_URI"]=> string(91) "/technodad/%D8%A7%D9%84%D8%B7%D9%8A%D9%81-%D8%A7%D9%84%D8%B1%D8%A7%D8%AF%D9%8A%D9%88%D9%8A/" ["REDIRECT_STATUS"]=> string(3) "200" ["HTTP_X_FORWARDED_PROTO"]=> string(5) "https" ["HTTP_CONNECTION"]=> string(7) "upgrade" ["HTTP_HOST"]=> string(19) "technologyreview.ae" ["HTTP_CF_CONNECTING_IP"]=> string(13) "44.200.101.84" ["HTTP_CF_IPCOUNTRY"]=> string(2) "US" ["HTTP_ACCEPT_ENCODING"]=> string(4) "gzip" ["HTTP_CF_RAY"]=> string(20) "80ffcb63ee6b7fc3-IAD" ["HTTP_CF_VISITOR"]=> string(22) "{\"scheme\":\"https\"}" ["HTTP_USER_AGENT"]=> string(40) "CCBot/2.0 (https://commoncrawl.org/faq/)" ["HTTP_ACCEPT"]=> string(63) "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" ["HTTP_ACCEPT_LANGUAGE"]=> string(14) "en-US,en;q=0.5" ["HTTP_CDN_LOOP"]=> string(10) "cloudflare" ["PATH"]=> string(60) "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ["SERVER_SIGNATURE"]=> string(79) "Apache/2.4.52 (Debian) Server at technologyreview.ae Port 80" ["SERVER_NAME"]=> string(19) "technologyreview.ae" ["SERVER_ADDR"]=> string(11) "172.18.0.22" ["SERVER_PORT"]=> string(2) "80" ["REMOTE_ADDR"]=> string(13) "44.200.101.84" ["DOCUMENT_ROOT"]=> string(13) "/var/www/html" ["REQUEST_SCHEME"]=> string(4) "http" ["CONTEXT_PREFIX"]=> NULL ["CONTEXT_DOCUMENT_ROOT"]=> string(13) "/var/www/html" ["SERVER_ADMIN"]=> string(19) "webmaster@localhost" ["SCRIPT_FILENAME"]=> string(23) "/var/www/html/index.php" ["REMOTE_PORT"]=> string(5) "54200" ["REDIRECT_URL"]=> string(39) "/technodad/الطيف-الراديوي/" ["GATEWAY_INTERFACE"]=> string(7) "CGI/1.1" ["SERVER_PROTOCOL"]=> string(8) "HTTP/1.1" ["REQUEST_METHOD"]=> string(3) "GET" ["QUERY_STRING"]=> NULL ["SCRIPT_NAME"]=> string(10) "/index.php" ["PHP_SELF"]=> string(10) "/index.php" ["REQUEST_TIME_FLOAT"]=> float(1696279583.5861) ["REQUEST_TIME"]=> int(1696279583) ["argv"]=> array(0) { } ["argc"]=> int(0) ["HTTPS"]=> string(2) "on" } ["content_user_category"]=> string(4) "paid" ["content_cookies"]=> object(stdClass)#29423 (3) { ["status"]=> int(0) ["sso"]=> object(stdClass)#29426 (2) { ["content_id"]=> int(44231) ["client_id"]=> string(36) "1d1883f4-87d0-4156-8903-e6ceb0cb4224" } ["count_read"]=> NULL } ["is_agent_bot"]=> int(1) }
هو جزء من الطيف الكهرومغناطيسي الذي يتراوح تردده من 1 هرتز إلى 3000 غيغاهرتز. تُستخدم موجات الراديو على نطاق واسع ولا سيما في مجال الاتصالات.
أثبت الفيزيائي هاينريش هرتز وجود موجات راديو في ثمانينيات القرن التاسع عشر في جامعة تُعرف الآن باسم معهد كارلسروه للتكنولوجيا.
تتمتع الموجات الراديوية بالعديد من الميزات، إليك أهمها:
يُستخدم الطيف الراديوي في مجالات عدة، إليك أبرزها:
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.