This paper presents a compact circular ring antenna optimized for 5G n78 band applications using an Electromagnetic genetic algorithm. A fundamentally circular monopole antenna forms the core of the design; this is then modified into a considerably compact circular ring structure to substantially reduce size without compromising performance. Advanced genetic algorithms considerably optimize the antenna slots and stubs, substantially improving impedance matching to achieve S11 < − 23 dB and highly efficient power transfer. Genetic algorithms’ important capacity to explore many solutions makes them analytically important for designing exceptionally efficient and remarkably compact antennas, ideal for modern wireless systems. A meander line feeding technique is used. This further miniaturizes the antenna without sacrificing electrical performance. By increasing the electrical length of the antenna without increasing its physical size, a meander line feeding structure improves resonance within a compact footprint. The antenna’s low cost and a 1.6 mm thick FR4 substrate enable inexpensive mass production. The final antenna dimensions are precisely 0.29λ0 × 0.21λ0 × 0.02λ0, perfectly suitable for smooth integration into many 5G devices operating within the n78 band (3.3–3.8 GHz). This antenna provides a sustainable, cost-effective solution for high-performance 5G communication systems, achieving a 2.5 dB gain, 95% efficiency and 43.2% size reduction. Genetic algorithm optimization combined with meander feeding offers a sustainable, cost-effective solution for many compact, high-performance antennas used in 5G systems and this approach advances antenna technologies for future wireless communication.