{"product_id":"sirio-cx-440-440-455mhz-uhf-j-pole-antenna","title":"Sirio CX 440 UHF 440-455MHz 3\/4 Wave J-Pole Base Antenna","description":"\u003cp\u003eThe \u003cstrong\u003eSirio CX 440\u003c\/strong\u003e is a professional UHF base-station antenna covering \u003cstrong\u003e440-455MHz\u003c\/strong\u003e. It uses a \u003cstrong\u003e3\/4-wave coaxial J-pole\u003c\/strong\u003e design with omnidirectional radiation and vertical polarisation, making it suitable for fixed UHF radio systems operating within its specified frequency range.\u003c\/p\u003e\u003cp\u003eThe CX 440 is factory set for \u003cstrong\u003e440-455MHz at SWR ≤1.5\u003c\/strong\u003e and requires no tuning. Sirio specifies \u003cstrong\u003e0dBd \/ 2.15dBi gain\u003c\/strong\u003e, \u003cstrong\u003e250W CW maximum power\u003c\/strong\u003e, a \u003cstrong\u003e50-ohm impedance\u003c\/strong\u003e and an \u003cstrong\u003eN-female connector\u003c\/strong\u003e. The antenna is DC-grounded for static protection and designed for mast installation.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e440-455MHz UHF frequency range\u003c\/li\u003e\n\u003cli\u003e3\/4-wave coaxial J-pole design\u003c\/li\u003e\n\u003cli\u003eNo tuning required\u003c\/li\u003e\n\u003cli\u003eOmnidirectional radiation pattern\u003c\/li\u003e\n\u003cli\u003eLinear vertical polarisation\u003c\/li\u003e\n\u003cli\u003e0dBd \/ 2.15dBi gain\u003c\/li\u003e\n\u003cli\u003e250W maximum power (CW)\u003c\/li\u003e\n\u003cli\u003e50-ohm impedance\u003c\/li\u003e\n\u003cli\u003eDC-grounded construction for static protection\u003c\/li\u003e\n\u003cli\u003eN-female antenna connector\u003c\/li\u003e\n\u003cli\u003eDesigned for mast mounting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Sirio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e CX 440\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSirio Product Number:\u003c\/strong\u003e 2102701.00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier SKU:\u003c\/strong\u003e 11-645\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntenna Type:\u003c\/strong\u003e 3\/4-wave coaxial J-pole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 440-455MHz @ SWR ≤1.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuning:\u003c\/strong\u003e No tuning required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 50 ohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadiation:\u003c\/strong\u003e Omnidirectional\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarisation:\u003c\/strong\u003e Linear vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e 0dBd \/ 2.15dBi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Power:\u003c\/strong\u003e 250W CW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Protection:\u003c\/strong\u003e DC-Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e N-female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e Approx. 590mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 540g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e On-mast\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMast Diameter:\u003c\/strong\u003e 35-42mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Aluminium, brass, stainless steel and nylon\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 x Sirio CX 440 antenna\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This antenna is intended for radio systems operating within the 440-455MHz range. Users are responsible for ensuring that their transmitting equipment, frequency use and installation comply with applicable licensing and regulatory requirements.\u003c\/p\u003e","brand":"Sirio","offers":[{"title":"Default Title","offer_id":58553588646232,"sku":"MOON-11-645","price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/8753\/5192\/files\/sirio-cx-440-uhf-j-pole-antenna.png?v=1790241839","url":"https:\/\/kamsat.co.uk\/products\/sirio-cx-440-440-455mhz-uhf-j-pole-antenna","provider":"Kamsat","version":"1.0","type":"link"}