SW Loop Antenna

The small single turn magnetic loop (SSTML) antenna consists of a single winding inductor, about 3 feet (1 meter) in diameter, and a tuning capacitor. A second loop, which is one fifth of the diameter of the large loop, is connected to the feedline and this small loop is positioned in the large loop on the opposite side of the tuning capacitor. More: The SSTML has some very interesting properties: It has a small footprint. The loop I describe here looks like a circle in the vertical plane and is just a little over 3 feet (1 meter) in diameter. It is a rather quiet antenna.

The small single turn magnetic loop (SSTML) antenna operates based on the principles of magnetic induction and resonance. The primary component of the SSTML is a single-turn inductor formed by a conductive loop with a diameter of approximately 3 feet (1 meter). This loop is designed to resonate at specific frequencies when paired with a tuning capacitor, which allows for efficient energy transfer and tuning to desired frequency bands.

The tuning capacitor, placed in parallel with the main loop, adjusts the resonant frequency of the antenna system. By varying the capacitance, the antenna can be tuned to operate effectively across different frequency ranges, making it versatile for various applications, including amateur radio and shortwave communication.

In addition to the main loop, the SSTML includes a smaller secondary loop, which is one-fifth the diameter of the primary loop. This smaller loop is strategically positioned opposite the tuning capacitor and is connected to the feedline. The configuration of the secondary loop enhances the antenna's performance by improving impedance matching and reducing losses, contributing to the overall efficiency of the system.

The SSTML is characterized by its compact size, making it suitable for limited space environments while still providing effective performance. It is also known for its low noise characteristics, which can be advantageous in receiving weak signals or in crowded RF environments. Overall, the SSTML antenna design exemplifies a balance between size, efficiency, and operational versatility, making it a valuable choice for various RF applications.The small single turn magnetic loop (SSTML) antenna consists of a single winding inductor, about 3 feet (1 meter) in diameter, and a tuning capacitor. A second loop, which is one fifth of the diameter of the large loop, is connected to the feedline and this small loop is positioned in the large loop on the opposite side of the tuning capacitor.

The SSTML has some very interesting properties: It has a small footprint. The loop I describe here looks like a circle in the vertical plane and is just a little over 3 feet (1 meter) in diameter. It is a rather quiet antenna. It doesnt 🔗 External reference