{"product_id":"ads-b-dual-band-bandpass-filter-978-mhz-1090-mhz","title":"ADS-B Dual Band Bandpass Filter 978 MHz + 1090 MHz","description":"\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003ePRODUCT OVERVIEW\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cmeta charset=\"utf-8\"\u003eThis is a compact bandpass filter covering both the 978 MHz UAT and 1090 MHz ADS-B\/Mode S bands in a single part. The 1030 MHz interrogation frequency falling naturally within the passband between them.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eTypical insertion loss is 1.5 dB across the passband, with rejection of 40 dB below 700 MHz and 35 dB above 1400 MHz. This is enough to keep strong out-of-band signals from overwhelming your receiver before they get there.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe filter uses SMA-F PCB edge-mount connectors, handles up to +33 dBm input power, and operates across a -40°C to +85°C range.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cstrong\u003eAPPLICATIONS\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eRunning a dual-band ADS-B\/UAT feeder, dump1090 and dump978, FlightAware, PlaneFinder, or your own SDR setup? This filter is built for you.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAircraft transponders are weak. Strong neighbors like FM broadcast, cellular\/LTE, and other UHF sources can overload your SDR or LNA. Even when they're not close in frequency. The result: dropped messages, noisy decodes, and it has nothing to do with your antenna.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis filter rejects that interference before it reaches your receiver. Both ADS-B (1090 MHz) and UAT (978 MHz) pass through one filtered path — no need for two separate filters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eTypical uses:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eADS-B \/ Mode S and UAT feeders (dump1090, dump978, FlightAware, PlaneFinder, and similar)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eSingle-filter front end ahead of a splitter, for builds feeding separate 1090 MHz and 978 MHz SDRs from one antenna\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eProtecting an LNA or SDR front end from nearby strong transmitters\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eResearch-grade or professional ADS-B\/UAT monitoring stations\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv dir=\"ltr\" align=\"left\"\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol width=\"201\"\u003e \u003ccol width=\"218\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePassband\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\" style=\"text-align: center;\"\u003e\u003cspan\u003e978–1090 MHz\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePassband insertion loss\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\" style=\"text-align: center;\"\u003e\u003cspan\u003e1.5 dB\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eMinimum attenuation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\" style=\"text-align: center;\"\u003e\u003cspan\u003e40 dB (100–700 MHz)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp dir=\"ltr\" style=\"text-align: center;\"\u003e\u003cspan\u003e35 dB (1400–3000 MHz)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe filter uses SMA-F PCB edge mount connectors.\u003c\/li\u003e\n\u003cli\u003eMaximum RF input signal Level: +33 dBm\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eRELATED PRODUCTS\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cmeta charset=\"utf-8\"\u003eDon't have an LNA yet? Our\u003ca href=\"https:\/\/gpio.com\/products\/ads-b-dual-band-filtered-lna-978-mhz-1090-mhz\"\u003e ADS-B Dual Band Filtered LNA (15 dB gain)\u003c\/a\u003e combines this filter's rejection with amplification in one part — a simpler starting point than buying filter and amplifier separately.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIf you're using separate receive chains for the 1090 MHz and 978 MHz, consider these filters:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/gpio.com\/products\/ads-b-1090-mhz-bandpass-filter\"\u003e1090 MHz Bandpass\u003c\/a\u003e \u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/gpio.com\/products\/978-mhz-bandpass-filter\"\u003e978 MHz Bandpass\u003c\/a\u003e \u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/gpio.com\/products\/1030-mhz-bandpass-filter\"\u003e1030 MHz Bandpass\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"GPIO LABS","offers":[{"title":"Default Title","offer_id":71845227462678,"sku":null,"price":33.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1963\/0387\/files\/978-1090-2.jpg?v=1786540093","url":"https:\/\/gpio.com\/products\/ads-b-dual-band-bandpass-filter-978-mhz-1090-mhz","provider":"GPIO LABS","version":"1.0","type":"link"}