A Wideband Dual-Cavity-Backed Circularly Polarized Crossed Dipole Antenna

作者：Truong Khang Nguyen^*; Huy Hung Tran; Nghia Nguyen Trong

来源：IEEE Antennas and Wireless Propagation Letters, 2017, 16: 3135-3138.

DOI：10.1109/LAWP.2017.2764923

• Cavity antenna
• circularly polarized (CP)
• crossed dipole
• dual-cavity
• widehand

A novel widehand dual-cavity-hacked circularly polarized (CP) crossed dipole antenna is presented in this letter. The exciter of the antenna comprises two classical orthogonal straight dipoles for a simple design. Dual-cavity structure is employed to achieve unidirectional radiation and improve the broadside gain. In particular, the rim edges of the cavity act as secondary radiators, which contribute to significantly enhance the overall CP performance of the antenna. The final design with an overall size of 0.57 lambda(0), X 0.57 lambda(0),, X 0.24 lambda(0) where lambda(0) is the free -space wavelength at the lowest CP operating frequency of 2.0 CHzb yields a measured 10 dB impedance bandwidth (BW) of 79.4% and 3 dB axial -ratio BW of 66.7%. The proposed antenna exhibits right-handed circular polarization with a maximum broadside gain of about 9.7 Mlle.

• 出版日期2017