Slot antenna with coaxial feed capacitor-loaded step impedance

• Main Authors: Zhang Qingzhuo, Yin Xiaoxing, Zhao Hongxin
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

The invention discloses a slot antenna with coaxial feed capacitor-loaded step impedance, which relates to a slot antenna. The antenna comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) on the dielectric substrate (1) and a coaxial feed line (4), wherein the metal ground (2) is provided with the radiation slot (3); two ends (6) of the radiation slot (3) are short-circuited; the middle of the radiation slot (3) is provided with a plurality of capacitors (7) in parallel bridge connection onto the edge to form a low-impedance slot (8); the rest part of the radiation slot (3) is a high-impedance slot (9); an outer conductor (5) of the coaxial feed line (4) is connected with the metal ground (2); and the tail inner conductor (12) of the coaxial feed line (4) passes across the high-impedance slot (9) to be connected with the metal ground (2) at the edge (11). The antenna works under multiple frequency bands, and the antenna size and the cross polarization can be reduced. 同轴馈电电容加载阶跃阻抗的