| Abstrakt: |
One of the scientific facts that communications engineers are proud of is that the basic part of wireless systems is antennas, which help designers reach the best solutions and modern technologies to minimize antenna size, which is one of the requirements for work in 4G and 5G communications systems. The benefit of an electrically tiny antenna lies in its diminished dimensions. In this study, we have put forward internal solutions that impact both the decrease in the input impedance's reactive component and the current distribution. Additionally, we have suggested exterior solutions that solely target the reduction of the reactive component of the input impedance. The limitations of the antenna include a significant reactive component (capacitive for dipole/monopole antennas and inductive for loop antennas) and a low radiation efficiency caused by inadequate radiation resistance (Rr). An effective method for achieving antenna resonance is to incorporate an inductive or capacitive component that counteracts the reactive element, hence allowing impedance matching. However, the presence of a compensatory device, typically consisting of a coil and a separate capacitor, can disrupt the current distribution across the antenna. This disruption can improve the radiation resistance (Rr) and, therefore, raise the overall radiation efficiency. As a result, a novel technique has been identified, in proportion to the frequency bands used in modern communications systems. [ABSTRACT FROM AUTHOR] |
