A Dual-Band Base Station Antenna with a Split Ring for Sub-6 GHz Communication

<div>Evolution of the proposed antenna. (a) Ref. 1: patch + GND. (b) Ref. 2: patch + SR + GND. (c) Ref. 3: patch + balun + GND. (d) Proposed antenna: patch + SR + balun + GND.</div>

International Journal of Antennas and Propagation

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Figure 2

Figure 2: A Dual-Band Base Station Antenna with a Split Ring for Sub-6 GHz Communication 