A stripped coaxial cable is essentially an antenna on its own due to its inherent electromagnetic properties. When the outer metallic shield of the cable is removed, it exposes the inner conductor acting like an antenna element. The length of the exposed conductor determines the primary frequency range the antenna is resonant with.
However, there are a few considerations when using a stripped coaxial cable as an antenna:
1. Frequency Range: The resonant frequency of the improvised antenna depends on the length of the exposed conductor. The longer the exposed conductor, the lower the frequency it will be most effective in receiving or transmitting.
2. Radiation Pattern: The radiation pattern of a stripped coaxial cable antenna will be omnidirectional, meaning it will radiate and receive signals in all directions.
3. Efficiency: While usable as an antenna, stripped coaxial cables are generally not as efficient as purpose-built antennas designed for optimal signal reception or transmission.
4. Matching: The characteristic impedance of a stripped coaxial cable may differ from the standard 50 or 75 Ohm impedance of most receivers and transmitters. This can result in signal loss and reduced performance.
5. Interference: Being omnidirectional, the stripped coaxial cable antenna may be susceptible to interference from other electronic devices or nearby antennas.
6. Durability: A makeshift coaxial cable antenna may not be as mechanically sturdy as a proper antenna designed for outdoor or rugged use.
In short, while it's possible to use a stripped coaxial cable as an antenna, it may not be the optimal solution for high-performance applications where gain, directionality, and impedance matching are critical. For more effective and reliable reception or transmission, consider using an antenna designed specifically for the intended purpose and frequency band.
