Mini Loop Antenna Doughnut Antenna Low Impedance Converter Module For use with receivers etc Product Features: 1. omni-directional coverage: loop shape antenna design tends to make it has better omni-directional radiation characteristics, that is, in the horizontal plane in all directions of the signal transmission or reception is relatively uniform, suitable for broadcasting and multi-directional communication needs. 2. Wideband working ability: these antennas tend to cover a wide frequency range, including both medium wave (MF, Medium Frequency) and short wave (HF, High Frequency) bands, suitable for receiving or transmitting signals in multiple frequency bands. 3. space efficiency: due to its unique loop design, the donut antenna occupies less space than traditional long wire antennas, making it easy to be installed and deployed in space-constrained environments. 4. Easy to install and adjust: Most of the designs are user-friendly, and some models may provide tunable elements that allow users to adjust the operating frequency as needed to optimise reception or transmission. 5. Multi-functional use: compact, easy to carry, with variable capacitor tuning function to improve signal reception, ideal for use with malachite receivers. Product parameters: Blue: SW Shortwave Antenna Frequency range: 4MHz-24MHz Interface: SMA with pin connector Dimension: L110*W100*H20mm Red: AM Medium Wave Antenna Frequency Range: 500kHz-2000kHz Interface: SMA with pin connector Dimension: L110*W100*H20mm Black: Wideband receiving antenna Frequency: 10k-180MHz Connector: SMA male (inner pin and inner thread) Size: L110*W100*H12mm Product Description: This set of circular antenna of medium wave ring (red) and short wave ring (blue) is narrowband high resistance resonant antenna (Hi-Z), therefore, when connecting with malachite receiver, the medium wave and short wave rings should be connected to the high resistance antenna input of malachite (Hi-Z), connecting it wrongly will result in the antenna's impedance mismatch, which will cause the antenna to be detuned and can't work. Donut shortwave antenna, small loop antenna, loop antenna, mini loop, radio antenna, tuning loop. This antenna is a narrowband high resistance resonant antenna, need to be used with malachite receiver high resistance input port, otherwise it will cause the antenna detuned can not work! Product description: upgraded version of the donut broadband antenna, frequency range 10kHz-180MHz with low impedance converter, this does not require cumbersome tuning, low-frequency and high-frequency direct use, no need to replace the antenna, each band each frequency can be directly listening to the strong compatibility, recommended with the use of Quan Sheng UV-k5/k6 walkie-talkies. Product list: Module*1 _x000D_