This paper proposes a dual‐band filtering patch antenna with out‐of‐band rejection for 5G applications. The design is based on the substrate integrated suspended line (SISL) platform, which combines a T‐junction power divider, a square driven patch with an I‐slot, and two parasitic strips, fed by slot coupling to achieve the desired performance. The working mechanism of dual‐band operation is explained by analyzing |S11| and electric field distribution. The slot on the G5 layer can generate two different resonance modes in the upper and lower frequency bands, and a radiation null is produced simultaneously. The driven patch and parasitic strips generate additional resonant modes, and two radiation nulls are generated, which improve the frequency selectivity. The realized antenna operates in two frequency bands: 3.38–3.6 and 4.73–5.23 GHz. The peak gain can reach 9.11 and 7.61 dBi in the higher and lower bands, respectively. The excellent performance of this antenna provides one more choice for 5G communication systems.
展开▼
