Details

Autor(en) / Beteiligte

• La, Dong-Sheng
• Liu, Hao
• Wang, Run-Long
• Tian, Kang
• Qu, Mei-Jun

Titel

A Wide Stopband Filtering DDPA With Metal Vias and Metal Strips

Ist Teil von

• IEEE transactions on antennas and propagation, 2024-03, Vol.72 (3), p.2843-2848

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2024

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• In this communication, a wide stopband filtering dense dielectric patch (DDP) antenna (DDPA) with metal vias and metal strips is proposed. The feeding structure consists of a short-circuited microstrip line and a separated slot. Based on this feeding structure, the <inline-formula> <tex-math notation="LaTeX">TE_{11} </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">TE_{12} </tex-math></inline-formula> modes of DDP are successfully excited. The electric field region of the <inline-formula> <tex-math notation="LaTeX">TE_{11} </tex-math></inline-formula> mode is much smaller than the physical region of DDP. The electric field region of the <inline-formula> <tex-math notation="LaTeX">TE_{12} </tex-math></inline-formula> mode is basically the same as the physical region of DDP. The resonant frequency of <inline-formula> <tex-math notation="LaTeX">TE_{11} </tex-math></inline-formula> mode is close to the resonant frequency of the <inline-formula> <tex-math notation="LaTeX">TE_{12} </tex-math></inline-formula> mode and the passband is formed. Two semicircular DDPs are etched, and two semicircular metal strips are introduced to generate the low-frequency radiation null. Then, ten metal vias are loaded inside the DDP to further change the resonant frequencies of <inline-formula> <tex-math notation="LaTeX">TE_{11} </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">TE_{12} </tex-math></inline-formula> modes. The ten metal vias also adjust the H-plane radiation pattern of <inline-formula> <tex-math notation="LaTeX">TE_{12} </tex-math></inline-formula> mode and improve the impedance matching of the proposed filtering DDPA. The measured results are basically consistent with the simulated ones. The relative impedance bandwidth is 4.2% (3.08-3.21 GHz). The low-frequency stopband range is 0.1-3.05 GHz, and the high-frequency stopband range is 3.38-7.0 GHz. The filtering DDPA has good sideband selectivity and wide stopband.