📡 High-gain K-180WLA Active Loop Broadband Receiving Antenna: 100kHz-180MHz, 20dBi SDR Radio Loop Antenna for Small Loop and Shortwave Reception Review

【Complete Protection Circuit】The K-180WLA Active Loop Broadband Receiving Antenna has a complete protection circuit for anti-reverse battery, over discharge, over charge, over current, and antenna terminal short circuit.With numerically-precision processed shells, PCB high-frequency design, feeder high-density dense copper pure copper 50-1.5 feeder, materials used Create an ultra-high cost-effective antenna for the entire network. 【Convenience】The K-180WLA is an active loop broadband receiving antenna,built-in 3.7V 18650 flat head lithium battery. No external power supply required. The USB charging port is compatible with 5V charging plug and charging cables of Android phones. Using UHF low-noise preamplifier. The gain flatness is very good within the ultra-wide operating frequency of 0.1-180MHZ. 【Widely Used】The receiving frequency of this K-180WLA Active Loop Broadband Receiving Antenna covers long wave, medium wave, short wave, FM broadcast band and VHF aviation band. It is simple to set up with small diameter 55CM. It is suitable for outside the window, balcony, terrace and roof. It is best not to be surrounded by the surrounding area. It is very suitable for broadcasting with limited space. It provides a gain of about 20DB, even when working to 450MHZ gain, there is still about 8.9DB. 【High Quality】All the screws of the K-180WLA Active Loop Broadband Receiving antenna are made of 304 steel, and the preamplifier box is fully waterproof, which can be used for long-term outdoor wind and rain.