{"product_id":"tx490-jkd-20-490mhz-3-0dbi-flexible-sma-j-male-antenna","title":"Cdsenet TX490-JKD-20 490MHz 3.0dBi Flexible SMA-J Male Antenna","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333; line-height: 1.6; max-width: 1000px; margin: 0 auto; padding: 10px;\"\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 24px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 20px;\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; color: #444; margin-bottom: 20px;\"\u003eThe \u003cstrong\u003eTX490-JKD-20\u003c\/strong\u003e is a professional-grade 490MHz omnidirectional foldable rod antenna, engineered for high-stability Sub-GHz wireless communication. Featuring a \u003cstrong\u003e3.0 dBi peak gain\u003c\/strong\u003e and a precision-tuned radiator, it significantly enhances signal range and penetration. Encased in a flexible, high-toughness \u003cstrong\u003eTPEE material\u003c\/strong\u003e with a 90-degree adjustable knuckle, it ensures reliable performance for industrial IoT and smart metering systems.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX490-JKD-20-1.png?v=1775033793\" alt=\"\"\u003e\u003cbr\u003e\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; margin-bottom: 15px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; border: 1px solid #ececec;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f9f9f9; border-bottom: 2px solid #eee;\"\u003e\n\u003cth style=\"padding: 12px; font-weight: bold; color: #333;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 12px; font-weight: bold; color: #333;\"\u003eTechnical Value\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eFrequency Range\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e470 - 510 MHz (Center: 490MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003ePeak Gain\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e3.0 dBi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eVSWR\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-weight: bold; color: #e4393c;\"\u003e≤ 1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eConnector Type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eSMA-J (SMA Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eAntenna Height\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e200 mm (Straight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eRadome Material\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eTPEE (Flexible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eImpedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e50 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003ePolarization\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eVertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 25px;\"\u003eProduct Details\u003c\/h2\u003e\n\u003cdiv style=\"background: #ffffff; border: 1px solid #eee; border-radius: 8px; padding: 20px; margin-bottom: 20px;\"\u003e\n\u003ch3 style=\"font-size: 18px; color: #111; margin: 0 0 10px 0;\"\u003eFoldable \u0026amp; Rotatable Design\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eThe antenna features a flexible knuckle that allows for 90-degree folding and 360-degree rotation, making it easy to adjust for optimal signal reception in confined spaces.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX490-JKD-20.png?v=1775033794\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #ffffff; border: 1px solid #eee; border-radius: 8px; padding: 20px;\"\u003e\n\u003ch3 style=\"font-size: 18px; color: #111; margin: 0 0 10px 0;\"\u003eStandard SMA-J Interface\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eMade of pure copper with gold-plated pins, the SMA-J interface ensures low insertion loss and high-frequency signal integrity for long-term use.\u003c\/p\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; margin-bottom: 15px;\"\u003eProfessional Test Report\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f8fbff; border: 1px solid #e1ecf7; border-radius: 8px; padding: 20px; text-align: center;\"\u003e\n\u003cp style=\"font-size: 15px; color: #1e3a8a; margin-bottom: 15px;\"\u003eVerified with \u003cstrong\u003eAgilent E5071C\u003c\/strong\u003e: VSWR performance is optimized at \u003cstrong\u003e≤ 1.5\u003c\/strong\u003e across the 490MHz band.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX490-JKD-20-2.png?v=1775033793\" alt=\"\"\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; margin-bottom: 25px;\"\u003eIdeal Applications\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 20px;\"\u003e\n\u003cdiv style=\"flex: 1 1 300px; min-width: 280px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n\u003ch3 style=\"font-size: 17px; margin: 0 0 8px 0; color: #0056b3;\"\u003eLoRa \u0026amp; Sub-GHz IoT\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eIdeal for LoRaWAN gateways, remote sensors, and data acquisition terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 300px; min-width: 280px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n\u003ch3 style=\"font-size: 17px; margin: 0 0 8px 0; color: #0056b3;\"\u003eIndustrial Automation\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eReliable wireless telemetry for smart grids, agriculture, and water monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 25px;\"\u003eResources\u003c\/h2\u003e\n\u003ca href=\"https:\/\/www.cdebyte.com\/pdf-down.aspx?id=1027\" style=\"display: inline-block; padding: 12px 25px; background-color: #0056b3; color: #fff; text-decoration: none; border-radius: 6px; font-weight: 600; font-size: 15px;\" target=\"_blank\"\u003e📄 Download Datasheet (PDF)\u003c\/a\u003e\u003c\/section\u003e\n\u003csection style=\"border-top: 1px solid #eee; padding-top: 30px;\"\u003e\n\u003ch2 style=\"font-size: 20px; color: #111; margin-bottom: 20px;\"\u003eFAQ\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 5px;\"\u003eQ: Can this antenna be used for 433MHz devices?\u003c\/p\u003e\n\u003cp style=\"color: #666; margin: 0; font-size: 14px;\"\u003eA: This antenna is specifically tuned for 470-510MHz. For 433MHz, performance may decrease; we recommend using a dedicated 433MHz antenna.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 5px;\"\u003eQ: Is the interface waterproof?\u003c\/p\u003e\n\u003cp style=\"color: #666; margin: 0; font-size: 14px;\"\u003eA: While the TPEE material is durable, the SMA interface is not inherently waterproof. For outdoor rain exposure, additional sealing is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"cdsenet","offers":[{"title":"Default Title","offer_id":45301877276774,"sku":"tx490-jkd-20","price":1.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX490-JKD-20-_1_800x800_v2.jpg?v=1773986506","url":"https:\/\/cdsenet.store\/products\/tx490-jkd-20-490mhz-3-0dbi-flexible-sma-j-male-antenna","provider":"CDSENET, Built for the Wireless World","version":"1.0","type":"link"}