{"product_id":"tx230-jkd-20-230mhz-flexible-tpee-antenna-2-5dbi-sma-j","title":"Cdsenet TX230-JKD-20 230MHz TPEE Flexible Antenna 2.5dBi SMA-J IoT","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\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\u003eTX230-JKD-20\u003c\/strong\u003e is a 230MHz VHF flexible rod antenna with a TPEE radome and copper radiator, engineered for space-constrained installations on wireless RF modules and industrial IoT terminals. It delivers a \u003cstrong\u003epeak gain of 2.5 dBi\u003c\/strong\u003e across the \u003cstrong\u003e220–240MHz\u003c\/strong\u003e operating band with a maximum input power of \u003cstrong\u003e20W\u003c\/strong\u003e. The TPEE radome allows the antenna to be bent to various angles for restricted-space mounting. Note: the VSWR specification for this model is ≤3.0 (typ. 2.68 @ 230MHz), reflecting the physical constraints of achieving a compact flexible form factor at sub-300MHz VHF frequencies — see FAQ for guidance on selecting the appropriate antenna for your application. Updated March 2026.\u003c\/p\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX230-JKD-20.png?v=1774865200\" alt=\"TX230-JKD-20 230MHz VHF flexible TPEE rod antenna with copper radiator and SMA-J connector\" loading=\"lazy\" decoding=\"async\" style=\"display: block; margin: 0 auto; max-width: 100%; height: auto; border-radius: 8px;\"\u003e\n  \u003c\/section\u003e\n\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: 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;\"\u003eValue\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;\"\u003e220 – 240 MHz (Center: 230 MHz)\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;\"\u003e2.5 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: #c0392b;\"\u003e≤ 3.0 (Typ. 2.68 @ 230 MHz) — compact flexible VHF form factor\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;\"\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;\"\u003e\n            \u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eConnector Type\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003eSMA-J (SMA Male, nickel-plated)\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, weather-resistant)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n            \u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eRadiator Material\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003eCopper\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;\"\u003eRadiation Pattern\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003eOmnidirectional (vertical polarization)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n            \u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eMax Input Power\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003e20 W\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;\"\u003eOperating Temperature\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003e-40 °C to +85 °C\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n            \u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eCompliance\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003eRoHS\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr style=\"background-color: #fafafa;\"\u003e\n            \u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eLast Updated\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px;\"\u003eMarch 2026\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\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;\"\u003eTPEE Flexible Radome — Bend-to-Fit for Restricted Spaces\u003c\/h3\u003e\n      \u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eThe TPEE (Thermoplastic Polyester Elastomer) radome provides high elasticity and weather resistance, allowing the antenna to be bent to various angles for installations in enclosures where a rigid vertical antenna cannot fit. TPEE is more flexible and crack-resistant than standard rubber compounds, maintaining its mechanical properties across the full -40°C to +85°C operating range. The copper radiator inside the TPEE body retains its electrical length after bending, though radiation pattern symmetry will vary with bend angle.\u003c\/p\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX230-JKD-20-1.png?v=1774865200\" alt=\"TX230-JKD-20 TPEE flexible radome bend-to-fit installation for 230MHz VHF IoT module\" loading=\"lazy\" decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto; border-radius: 4px;\"\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;\"\u003eNickel-Plated SMA-J Connector — 20W Rated for Industrial Modules\u003c\/h3\u003e\n      \u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eThe nickel-plated SMA-J (male, inner pin) connector provides a corrosion-resistant, 50Ω interface to SMA-K female ports on 230MHz wireless modules and industrial transceivers. Rated for 20W maximum input power — double the 10W rating of the TX230-JK-11 — the TX230-JKD-20 is suitable for higher-power 230MHz transmitters while maintaining the flexible form factor. The connector is rated for repeated mating cycles in field-serviceable installations.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\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: 20px;\"\u003eProfessional Test Report\u003c\/h2\u003e\n    \u003cdiv style=\"background-color: #f8fbff; border: 1px solid #e1ecf7; border-radius: 8px; padding: 20px; text-align: center; margin-bottom: 20px;\"\u003e\n      \u003cp style=\"font-size: 15px; color: #1e3a8a; margin-bottom: 15px;\"\u003eMeasured with a vector network analyzer (Agilent E5071C equivalent): VSWR = \u003cstrong\u003e2.68 @ 230 MHz\u003c\/strong\u003e, within the ≤3.0 specification. At VSWR = 2.68, reflected power is approximately 20% (return loss ≈ 7 dB). This is a characteristic trade-off of achieving a compact, flexible form factor at 230MHz, where the antenna's physical length is significantly shorter than the ideal quarter-wavelength of ~326mm.\u003c\/p\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX230-JKD-20-2.png?v=1774865199\" alt=\"TX230-JKD-20 VSWR test chart 230MHz measured with Agilent network analyzer VSWR 2.68\" loading=\"lazy\" decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px;\"\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"background-color: #f8fbff; border: 1px solid #e1ecf7; border-radius: 8px; padding: 20px; text-align: center;\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX230-JKD-20-3.png?v=1774865200\" alt=\"TX230-JKD-20 radiation pattern test chart 230MHz VHF flexible TPEE antenna omnidirectional\" loading=\"lazy\" decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px;\"\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\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;\"\u003eIdeal Applications\u003c\/h2\u003e\n    \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 20px;\"\u003e\n      \u003cdiv style=\"flex: 1 1 220px; min-width: 200px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n        \u003ch3 style=\"font-size: 16px; margin: 0 0 8px 0; color: #0056b3;\"\u003eSpace-Constrained 230MHz Modules\u003c\/h3\u003e\n        \u003cp style=\"font-size: 14px; color: #666; margin: 0;\"\u003eWireless RF modules and industrial transceivers in compact enclosures where a rigid 110mm+ antenna cannot be mounted vertically and a flexible bend-to-fit solution is required.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv style=\"flex: 1 1 220px; min-width: 200px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n        \u003ch3 style=\"font-size: 16px; margin: 0 0 8px 0; color: #0056b3;\"\u003eIndustrial IoT \u0026amp; Telemetry\u003c\/h3\u003e\n        \u003cp style=\"font-size: 14px; color: #666; margin: 0;\"\u003eRemote sensing nodes, industrial telemetry systems, and smart grid monitoring devices operating at 230MHz where installation flexibility is prioritized over maximum impedance matching.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv style=\"flex: 1 1 220px; min-width: 200px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n        \u003ch3 style=\"font-size: 16px; margin: 0 0 8px 0; color: #0056b3;\"\u003eAgricultural Sensor Networks\u003c\/h3\u003e\n        \u003cp style=\"font-size: 14px; color: #666; margin: 0;\"\u003eLong-range IoT sensor nodes for soil, weather, and irrigation monitoring using 230MHz VHF, where the flexible antenna accommodates varied enclosure orientations in field deployments.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv style=\"flex: 1 1 220px; min-width: 200px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff;\"\u003e\n        \u003ch3 style=\"font-size: 16px; margin: 0 0 8px 0; color: #0056b3;\"\u003eHigher-Power VHF Terminals\u003c\/h3\u003e\n        \u003cp style=\"font-size: 14px; color: #666; margin: 0;\"\u003e230MHz wireless terminals and handheld devices with transmit power up to 20W, where the TX230-JKD-20's higher power rating provides headroom over the 10W-rated TX230-JK-11.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\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=1234\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display: inline-block; padding: 12px 25px; background-color: #0056b3; color: #fff; text-decoration: none; border-radius: 6px; font-weight: 600; font-size: 15px;\"\u003e📄 Download Datasheet (PDF)\u003c\/a\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"border-top: 1px solid #eee; padding-top: 30px;\"\u003e\n    \u003ch2 style=\"font-size: 20px; color: #111; margin-bottom: 20px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n    \u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n      \u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: Why is the VSWR specification ≤3.0 instead of ≤1.5 or ≤2.0?\u003c\/p\u003e\n      \u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: At 230MHz, the ideal quarter-wavelength radiator is approximately 326mm. The TX230-JKD-20 uses a physically shorter, flexible TPEE-encased radiator to enable bend-to-fit installation in compact enclosures. This size reduction requires impedance matching trade-offs that result in a higher VSWR compared to full-length antennas. At VSWR = 2.68, approximately 20% of transmitter power is reflected. For applications where impedance matching is critical, the TX230-JK-11 (VSWR 1.09) or TX230-TB-300 (VSWR ≤1.5) are recommended alternatives.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n      \u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: When should I choose the TX230-JKD-20 over the TX230-JK-11?\u003c\/p\u003e\n      \u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: Choose the TX230-JKD-20 when: (1) your enclosure cannot accommodate a rigid 110mm antenna vertically and requires a flexible bend-to-fit solution, or (2) your transmitter output power exceeds 10W (the TX230-JK-11's limit) up to 20W. Choose the TX230-JK-11 when impedance matching is the priority (VSWR 1.09 vs 2.68) and your enclosure can accommodate a rigid vertical antenna. For external mounting with maximum gain, use the TX230-TB-300 sucker antenna.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n      \u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: Is the TX230-JKD-20 compatible with 433MHz or other sub-1GHz modules?\u003c\/p\u003e\n      \u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: No. The TX230-JKD-20 is tuned for 220–240MHz. Using it at 433MHz will result in a VSWR exceeding 5.0 and a communication range reduction of 80% or more. For 433MHz LoRa or FSK applications, use a dedicated 433MHz antenna. For 170MHz applications, use the TX170-XP-200 or TX170-TB-300. Always match the antenna's center frequency to your module's operating frequency.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n      \u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: Does bending the antenna affect its RF performance?\u003c\/p\u003e\n      \u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: Yes. Bending the antenna alters the radiation pattern — a bent antenna no longer radiates in a purely omnidirectional pattern. The VSWR specification of ≤3.0 is measured with the antenna in a straight vertical position. Bending may slightly shift the resonant frequency and further increase VSWR. For applications requiring consistent omnidirectional coverage, mount the antenna vertically. Use the bend capability only for space-constrained installations where pattern symmetry is less critical than physical fit.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n      \u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: What is the maximum input power and operating temperature?\u003c\/p\u003e\n      \u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: The TX230-JKD-20 is rated for a maximum input power of 20W and an operating temperature of -40°C to +85°C. The 20W power rating is double that of the TX230-JK-11 (10W), making it suitable for higher-power 230MHz transmitters. The TPEE radome is weather-resistant and RoHS-compliant. For direct outdoor exposure, protect the SMA connector junction with self-amalgamating tape to prevent moisture ingress.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n\u003c\/div\u003e","brand":"cdsenet","offers":[{"title":"Default Title","offer_id":45301875408998,"sku":"tx230-jkd-20","price":1.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX230-JKD-20-_2_800x800_v2.jpg?v=1773986648","url":"https:\/\/cdsenet.store\/products\/tx230-jkd-20-230mhz-flexible-tpee-antenna-2-5dbi-sma-j","provider":"CDSENET, Built for the Wireless World","version":"1.0","type":"link"}