Summary
International Symposium on Antennas and Propagation
2012
Session Number:1D4
Session:
Number:1D4-3
Design of a Miniaturized Square Slot Antenna Using Y-strips for Enhancement of Circularly Polarization Bandwidth
Suwhan Kim,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
Circulary-polarized (CP) planar antennas have been received much attention for mobile wireless communication applications since they are not only able to reduce the multipath effects but also provide flexibility for transceivers [1]. CP microstrip antennas are widely used but they are required to have broadband, small size, light weight, and low profile characteristics [2]. However, conventional CP microstrip antennas had some drawbacks such as narrow impedance and CP bandwidths [3][4]. Also it is difficult to implement a broadband CP microstrip antenna having small dimensions. To enhance the impedance bandwidth, CP antennas using slot structure instead of the microstrip structure were proposed [5]. Still in the open articles, the slot antennas which have wide CP bandwidth of more than 20% are quite few and their dimensions are larger than that of a microstip antenna normally. The purpose of this paper is to propose a slot CP antenna with enhanced impedance and CP bandwidths with a reduced size. Broadened impedance and CP bandwidths are implemented by adopting the inverted L-shaped feed line and the square slot with a pair of y-strips. By adjusting the dimensions of y-strips which have a great role in enhancing the CP bandwidth, the CP bandwidth of the antenna can be increased up to 29 %. the CP bandwidth of the proposed antenna can cover the entire industrial, scientific, and medical (ISM) band (2.4 ~ 2.485 GHz). Additionally, the dimension of the antenna is reduced by using the meander feed line.