{"id":621,"date":"2025-11-02T09:29:09","date_gmt":"2025-11-02T01:29:09","guid":{"rendered":"http:\/\/www.ftune.com.cn\/?p=621"},"modified":"2025-12-18T17:27:55","modified_gmt":"2025-12-18T09:27:55","slug":"%e7%9f%ad%e6%b3%a2%e5%a4%a9%e7%ba%bf%e6%8a%80%e6%9c%af%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"http:\/\/www.ftune.com.cn\/en\/%e7%9f%ad%e6%b3%a2%e5%a4%a9%e7%ba%bf%e6%8a%80%e6%9c%af%e5%8d%8f%e8%ae%ae\/","title":{"rendered":"Omni-directional shortwave antenna (3MHz-30MHz) (user manual)"},"content":{"rendered":"

<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

a) Frequency range: 3MHz\uff5e30MHz;<\/p>\n\n\n\n

b) Polarization: Vertical;<\/p>\n\n\n\n

c) Gain: \u2265-24dBi;<\/p>\n\n\n\n

d) Input impedance: 50\u03a9;<\/p>\n\n\n\n

e) Voltage Standing Wave Ratio: \u22644;<\/p>\n\n\n\n

f) H-plane radiation pattern: omnidirectional;<\/p>\n\n\n\n

g) Power capacity: 300W;<\/p>\n\n\n\n

h) RF Interface: N-50KF;<\/p>\n\n\n\n

i) Installation method: flange mounting;<\/p>\n\n\n\n

j) Interface location: side;<\/p>\n\n\n\n

k) Weight: \u22645Kg;<\/p>\n\n\n\n

1) Height: 3 meters<\/p>\n\n\n\n

m) Lightning Protection Design: The antenna has a lightning protection function (DC grounding);<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

1. Environmental adaptability requirements (assessed with the complete machine)<\/strong><\/p>\n\n\n\n

Main equipment meets the requirements<\/strong>GJB<\/strong>3947A-2009<\/strong>Requirements for Level 3 test equipment.<\/strong><\/p>\n\n\n\n

1) Operating temperature: indoor equipment 0\u2103~50\u2103, outdoor equipment -30\u2103~50\u2103<\/p>\n\n\n\n

2) Storage temperature: -40\u2103~ 70\u2103<\/p>\n\n\n\n

3) Relative Humidity: When the temperature range is 10\u2103~30\u2103, the relative humidity is 5~95%; when the temperature range is 30\u2103~40\u2103, the relative humidity is 5~75%; when the temperature is above 40\u2103, the relative humidity is 5~45%. (According to GJB3947A-2009 standard).<\/p>\n\n\n\n

4) Indoor equipment is drop-resistant and shockproof<\/strong><\/p>\n\n\n\n

Shock: 20g, pulse width 11ms;<\/p>\n\n\n\n

Vibration: Test parameters: 5Hz\uff5e500Hz, 0.015g\u00b2\/Hz, 0.075g\u00b2\/Hz, 0.0039g\u00b2\/Hz, three axes six directions, 10 minutes per axis, device not operating.<\/p>\n\n\n\n

5) Mold: No mold growth on the material (meets the GJB15.10-1986 test requirements)<\/p>\n\n\n\n

6) Salt spray (outdoor equipment) at 35\u00b0C in coastal areas; salt solution concentration 5%, 48 hours (in accordance with GJB15.11-1986 test requirements).<\/p>\n\n\n\n

7) Wind resistance stability: Outdoor equipment can operate normally under wind conditions of 38 km\/h (below level 5) Wind resistance strength: Outdoor equipment is not damaged under wind conditions of 61 km\/h (below level 7);<\/p>\n\n\n\n

8) Lightning protection: The equipment should, in combination with the actual conditions of the BS site, take necessary lightning protection measures to meet the relevant requirements in GJB6784-2009 \"General Requirements for JY Ground Electronic Facilities and Lightning Protection\".<\/p>\n\n\n\n

9) Electromagnetic Compatibility Requirements<\/p>\n\n\n\n

The system should comply<\/strong> GJB<\/strong>151B-2013<\/strong>\u300a<\/strong>JY<\/strong> <\/strong>Requirements and Measurements for Electromagnetic Emissions and Susceptibility of Equipment and Subsystems<\/strong><\/p>\n\n\n\n

GJB1389A-2005\u300a\u7cfb\u7edf\u7535\u78c1\u517c\u5bb9\u6027\u8981\u6c42\u300b\u76f8\u5173\u8981\u6c42\uff0c\u5728\u9884\u5b9a\u7684\u7535\u78c1\u73af\u5883\u4e2d\u80fd\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n\n\n\n

2<\/strong>  \u6210\u5957\u6027\u8981\u6c42<\/strong>\u4ea7\u54c1\u6210\u5957\u6027\u8981\u6c42\u5982\u4e0b\u3002<\/strong><\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

3<\/strong>  \u5916\u89c2\u8d28\u91cf<\/strong><\/p>\n\n\n\n

\u4ea7\u54c1\u5916\u89c2\u5e94\u6574\u6d01\uff0c\u8868\u9762\u5e94\u65e0\u51f9\u75d5\u3001\u78b0\u4f24\u3001\u88c2\u7f1d\u3001\u53d8\u5f62\u3001\u6bdb\u523a\u7b49\u73b0\u8c61\uff1b\u6d82\u9540\u5c42\u4e0d\u5e94\u8d77\u6ce1\u3001 \u5806\u79ef\u3001\u9f9f\u88c2\u548c\u8131\u843d\uff1b\u91d1\u5c5e\u96f6\u4ef6\u4e0d\u5e94\u6709\u9508\u8680\u548c\u5176\u5b83\u673a\u68b0\u635f\u4f24\uff1b\u7d27\u56fa\u96f6\u4ef6\u65e0\u677e\u52a8\u3002<\/p>\n\n\n\n

4<\/strong>  \u68c0\u9a8c\u62a5\u544a<\/strong><\/p>\n\n\n\n

\u63d0\u4f9b\u5929\u7ebf\u7684\u51fa\u5382\u68c0\u9a8c\u62a5\u544a\u548c\u6d4b\u8bd5\u62a5\u544a\u3002<\/p>\n\n\n\n

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Omni-directional shortwave antenna (3MHz-30MHz) (user manual) <\/a><\/p>\n\n\n\n

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8 vehicle-mounted antennas (225-512, 225-678, 542-698, 500-3000, 1400-1710, 400-430, 1.6-30MHz)<\/a><\/p>\n\n\n\n

Ultra-wideband omni-directional 80\uff5e2200MHz, wideband omni-directional 900\uff5e1350, 100\uff5e430MHz antennas <\/a><\/p>\n\n\n\n

\"Rotating 6 to 26 MHz, 4.2 to 30 soft oscillator, ultra-wideband log period 30 to 3000 MHz, multimode multi-feed (high elevation 3 MHz to 26 MHz low elevation 6 MHz to 26 MHz), vertical cage 2 to 26 MHz, three-wire horizontal 2 to 30, and three-wire inverted V2 to 26 MHz antennas\"<\/a><\/p>\n\n\n\n

\"FM sucker 76 to 108 MHz, directional (multiple frequency ranges), omnidirectional 30 to 520 MHz, biconical 30 to 520 MHz, high elevation 3 to 30 MHz antenna\" <\/a><\/p>","protected":false},"excerpt":{"rendered":"

a) Frequency Paradigm ...<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,3],"tags":[],"class_list":["post-621","post","type-post","status-publish","format-standard","hentry","category-1","category-3"],"_links":{"self":[{"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/posts\/621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/comments?post=621"}],"version-history":[{"count":10,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/posts\/621\/revisions"}],"predecessor-version":[{"id":1702,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/posts\/621\/revisions\/1702"}],"wp:attachment":[{"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/media?parent=621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/categories?post=621"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ftune.com.cn\/en\/wp-json\/wp\/v2\/tags?post=621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}