Title :
Meander Line Coupled Cavity-Backed Slot Antenna for Broadband Circular Polarization
Author :
Kang Luo ; Bin Chen ; Wei-Ping Ding
Author_Institution :
Nat. Key Lab. on Electromagn. Environ. Effects & Electro-Opt. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
A Meander lines coupled cavity-backed slot antenna with broadband circularly polarized (CP) property is investigated. The proposed antenna comprises four meander lines, a cavity, and a sequential rotation feed network. By connecting ground planes of the patch substrate and the feed substrate with the slot cavity leads to resonant frequency at low band. The validity of the antenna´s performances is verified with a fabricated prototype. Measured results show that the designed antenna can yield 10-dB return-loss bandwidth of 40% (1.8 to 2.7 GHz), 3-dB axial-ratio (AR) bandwidth of about 34.04% (1.95 to 2.75 GHz), and 3-dB gain bandwidth of about 35.29% (2.1-3 GHz) with the maximum gain 5.15dBi. The antenna without cavity is also discussed.
Keywords :
UHF antennas; antenna feeds; broadband antennas; electromagnetic wave polarisation; microstrip antennas; slot antennas; AR bandwidth; axial-ratio bandwidth; broadband circular polarization; feed substrate; frequency 1.8 GHz to 2.7 GHz; frequency 1.95 GHz to 2.75 GHz; frequency 2.1 GHz to 3 GHz; gain 3 dB; meander line coupled cavity-backed slot antenna; patch substrate; resonant frequency; return-loss bandwidth; sequential rotation feed network; slot cavity; Antenna measurements; Bandwidth; Broadband antennas; Cavity resonators; Feeds; Slot antennas; Broadband antenna; cavity-backed; circular polarization; slot antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2015.2399017
