Design of Multi-Frequency Multi-Mode Dipole Antenna Based on Balanced Microstrip

This paper presents a multi-frequency and multi-mode dipole antenna based on balanced microstrip line. The an-tenna employs an asymmetric feeding approach, achieving a re-flection coefficient below -10 dB in three frequency bands: 1.30-1.64 GHz, 2.4-2.7 GHz, and 3-4.05 GHz. Moreover, within the operational frequency range, it exhibits omnidirectional radiation characteristics and two-directional radiation characteristics respectively. The antenna presented in this paper achieves differ-ent current distribution patterns in the three frequency bands, enabling multi-mode radiation characteristics in the Sub-6G frequency range. It possesses the advantages of low profile and light weight, showing potential applications in miniaturization and cost reduction for wireless systems in 5G applications.