Design of compact dual‐band shared‐aperture antenna system based on frequency selective surface

Abstract

A miniaturized dual-band dual-polarization base station antenna array operating at 2.4-2.8 and 4.6-5.0 GHz is proposed in this paper. The upperband unit is embedded in the lower-band unit to miniature the array size. The size of the proposed shared-aperture antenna element is 0.28 × 0.28 λ L . To ensure the normal radiation of dual-band under the small frequency ratio, a meander slot frequency selective surface structure is introduced, which is electromagnetically transparent to the lower-band unit and function as metal ground for the upper-band unit to ensure the normal radiation of the upper and lower-band units, respectively. Simulation and measured results show that the antenna array meets the following design specifications: dual-band operating (voltage standing wave ratio [VSWR] < 2), mutual coupling less than −20 dB basically, satisfactory gain and radiation characteristics.

A low‐profile dual‐wideband magnetoelectric dipole antenna with stable gain

“…3,4 Three methods are mainly utilized to design dualband antennas. One method is to combine multiple antennas that work at different frequency bands together as a whole, such as inserting higher band antennas under a lower band crossed dipole antenna, 5 as well as embedding a dipole antenna working at 1.7-2.7 GHz into a bowl-shaped antenna operating at 0.698-0.96 GHz. 6 However, the combining of interband antennas leads to an increase in size, structural complexity, and cost.…”