{"product_id":"433mhz-antenna-quarter-wave-helical-for-rf-modules","title":"433MHz Antenna | Quarter Wave Helical for RF Modules","description":"\u003ch1\u003e433MHz Antenna – Quarter-Wave Helical for Wireless RF\u003c\/h1\u003e\n\n\u003cp\u003eThis 433MHz antenna is designed for short-range wireless communication using RF modules. It provides reliable signal transmission and reception for remote controls, IoT sensors, and hobbyist radio projects. The helical design offers a compact yet effective solution with a nominal 2dBi gain, making it ideal for projects where size matters without sacrificing performance. With its 50-ohm impedance, it matches standard RF circuits, minimizing signal loss.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e433 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e50 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eVSWR\u003c\/td\u003e\n\u003ctd\u003e≤2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e2 dBi typical\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePolarization\u003c\/td\u003e\n\u003ctd\u003eLinear (vertical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eSMA Male (solderable pin also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003eApproximately 170 mm (quarter-wave)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e433MHz wireless remote control for lights or fans\u003c\/li\u003e\n  \u003cli\u003eIoT sensor node transmitting temperature\/humidity data\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-garage-door-opener-kit-auto-open-and-close-via-phone-ble\"\u003eGarage door opener or car remote replacement\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSimple walkie-talkie for learning radio basics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis antenna works with any 433MHz transmitter or receiver module, including popular pairs like FS1000A and XY-MK-5V. It connects via standard SMA jack or can be soldered directly to pads on circuits operating at 3.3V to 12V. Commonly used with Arduino, ESP8266, and Raspberry Pi for wireless data links. The quarter-wave design ensures a balanced radiation pattern in free space.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eIf using the SMA connector, screw it onto a mating SMA jack on your module. For direct solder, the center pin is the signal and the outer ground plane must be connected to circuit ground. Keep the antenna vertical and away from large metal objects for best range. No external matching network is required when used with typical 50Ω modules. For battery-powered projects, consider placing the antenna away from the battery to avoid detuning.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with 433MHz RF modules like FS1000A?\u003c\/summary\u003e\u003cp\u003eYes, it's tuned for 433MHz and directly fits modules with SMA jacks or solder pads. Works with FS1000A, XY-MK-5V, and similar.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat's the connector type?\u003c\/summary\u003e\u003cp\u003eThe antenna has an SMA male connector, but it also comes with a solderable pin at the base for direct PCB attachment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this antenna outdoors?\u003c\/summary\u003e\u003cp\u003eIt is suitable for indoor and light outdoor use; however, for permanent outdoor installation, consider an antenna with weatherproofing like an IP-rated enclosure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445046763885,"sku":"CDN-0857","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_6660c50d-5e35-470e-b703-a39be82130b1.jpg?v=1781513048","url":"https:\/\/compoden.com\/products\/433mhz-antenna-quarter-wave-helical-for-rf-modules","provider":"Compoden","version":"1.0","type":"link"}