Ho-yong Kim', Yong-nn Lee, Chung-ho Won, Hong-min Lcc Department of Electronics EngineeringKyon@ Univerrily hi-Dong, Yeongtong-Cu, Suwon-Si, Kyonggi-do, Korea email: hyounrsn@hotmail.com
lnlraduetion
In recent years, with the advance o f technology, the demand for an antenna operating a1 mutibands i s increasing rapidly. Such as GPS and K-PCS, The multi-hand antennas with one feeding pon use the multiple resonance technolagy[l] such antennal are difficult lo provide a good polarization efficiency for GPS signal reception. So the integrated GPSIK-PCS dual-band antenna using two feeding pan has been proposed in this paper. Referenced dual-band antenna using two feeding pon has matched poiariration of integrated system.[2] but it has large size. Proposed antenna uses miniafurizalion technique that is to insect ilits. This technique is to increase elecVlcal surface length by slits.[3-5] Operating frequency o f proposed Bntenna is greatly lowered by slit^. Meander line patch and square ring patch with four diu o f proposed antenna are about 70% and 50% ofreferenced antenna size.
The proposed antenna composed of a low-profile cylindrical monopole with a top-loaded meander line patch for K-PCS Operation, and a comer-truncated square-ring microstrip patch antenna with four-slits for GPS ooeration.
Pmposed Antenna Design The geometry and design parameter of the proposed antenna for compact GPSIK-PCS operation i s presented in Figure I.The proposed antenna has the common ground plane, but i s
fed by separate feeding pon. The antenns for GPS-hand i s realized by using a corner-truncated square-ring microstrip patch with four slits. The outer side length and inner ride length are40mm(L,)and IZmm(&) ~ ~ p % t i d printed on a rubrtrale o f thickness 1.6mm(h) and y, relative peminiviry
(e, :4.4). The middle ofthe substrate is removed for inner rectangular d i t
area ( b x b )