A Metamaterial-Based Shared-Aperture Antenna With Conical Patterns

This paper presents a metamaterial-based (MM-based) shared-aperture antenna, which is of dual frequencies, conical patterns, vertical polarization and separated channels. The low-frequency (LF) antenna is located above the high-frequency (HF) antenna, and is composed of MM cells with electromagnetic transparency to avoid blocking the HF antenna. The proposed shared-aperture antenna is able to operate at 3 GHz and 5.8 GHz with bandwidth of 2.9-3.1 GHz and 5.25-6.15 GHz, gain of 4.8 dBi and 5.2 dBi, and aperture efficiency over 50.3% and 45.4%, respectively. The proposed design exhibits the merits of high gain, rotationally symmetric patterns, compact structure, and separated channels, which is of promising application value in indoor Wi-Fi/5G communication, signal blind compensation and many other scenarios.