868MHz 915MHz RF Bandstop Filter SMA Notch Filter 780-1040MHz High Rejection for 868M Helium Miner Lora SDR FPV Drone Receiver

868M / 915M / 1GHz Bandstop Filter – Notch Filter for Signal Interference Rejection (Helium Miner, Block Strong Signals, LORA SDR)Please refer to the advertisement test video before making the purchase.Product Description:This high‑performance bandstop (notch) filter is designed to eliminate strong interfering signals at 868MHz, 915MHz, and 1GHz– frequencies commonly used by Helium miners, LoRa devices, GSM900, CDMA800, and other wireless systems. It provides extremely deep notches (≥65dB) at these typical points, effectively blocking unwanted signals while preserving the rest of the broadband spectrum. Ideal for Helium hotspots suffering from adjacent strong signals, for cleaning up LORA SDR receiver inputs, or for any radio setup where narrowband interference needs to be removed.Key Specifications:Center Frequency: 920 MHzCenter Attenuation: ≥60 dB40 dB Stopband: 815 – 1030 MHzTypical Notch Depth:≥70dB @ 868MHz≥80dB @ 915MHz≥65dB @ 1GHzPassband Insertion Loss:≤1.8dB @ DC – 700MHz≤2.2dB @ 1.2 – 5GHzMax Input Power: 4W (36dBm)Impedance: 50ΩConnectors: SMA female (outer thread, inner hole)Dimensions (excl. connectors): 38 × 18.8 × 11 mmApplications:Helium (HNT) miners: blocking strong 868/915MHz signals that cause desensitizationLoRa receivers and SDRs: removing GSM/CDMA interferenceLORA gateways: cleaning up receive pathRF testing: suppressing unwanted ISM or cellular bandsRadio astronomy or weak signal reception in 800‑1000MHz environment