1、A broadband antenna, very suitable for shortwave listeners (SWL) and amateur wireless enthusiasts (HAM). Able to enjoy medium and shortwave in cities with limited space such as balconies and roofs 2、The user can also change the direction of the antenna by himself, so that the dummy point of the antenna is aligned with the interference signal to minimize specific near field interference 3、With modular design, can be easily and conveniently installed in limited spaces such as balconies and roofs. Directivity can help users reduce noise and improve signal to noise ratio 4、With a small and compact design, which is not easy to attract the attention of others, and there is no need to worry about opposition from neighbors and the property after installation 5、Adopting stainless steel wake up vibrator and rainproof case for outdoor use, easy to install and maintain, and the power supply adopts typical 12V. with simple operation and good concealment Parameter Parameter Value Module Model HF05-30 Loop Antenna Module Type Active Shortwave Antenna Module Power Supply DC+12V Operating Frequency Range 0.5MHz—30MHz Maximum Output Power -15dBm Noise Figure 1.5dB Module Input and Output Interface SMA Module Application Various (medium and shortwave SDR antennas, RTL SDR receiver antennas, etc.) Module Interface Type Output SMA Interface 1 x Antenna Module 1 x Loop Antenna