Design of Compact Dual-Band Microstrip Patch Antenna

Structure of Compact Dual-Band Microstrip Patch Antenna for GPSK-PCS Operation Ho-yong Kim', Yong-nn Lee, Chung-ho Won, Hong-min Lcc Department of Electronics [emailâ protected] Univerrily hello Dong, Yeongtong-Cu, Suwon-Si, Kyonggi-do, Korea email: [emailâ protected] com lnlraduetion as of late, with the development o f innovation, the interest for a reception apparatus working a1 mutibands I s expanding quickly. For example, GPS and K-PCS, The multi-hand recieving wires with one taking care of pon utilize the numerous reverberation technolagy[l] such antennal are troublesome lo give a decent polarization proficiency to GPS signal gathering. So the coordinated GPSIK-PCS double band reception apparatus utilizing two taking care of container has been proposed in this paper. Referenced double band reception apparatus utilizing two taking care of pon has coordinated poiariration of incorporated framework. [2] yet it has enormous size. Proposed radio wire utilizes miniafurizalion procedure that is to creepy crawly ilits. This method is to build elecVlcal surface length by cuts. [3-5] Operating recurrence o f proposed Bntenna is extraordinarily brought down by slit^. Wander line fix and square ring patch with four diu o f proposed radio wire are about 70% and half ofreferenced recieving wire size. The proposed reception apparatus made out of a position of safety barrel shaped monopole with a top-stacked wander line fix for K-PCS Operation, and a comer-shortened square-ring microstrip fix radio wire with four-cuts for GPS ooeration. Pmposed Antenna Design The geometry and plan parameter of the proposed recieving wire for reduced GPSIK-PCS activity I s introduced in Figure I. The proposed radio wire has the shared belief plane, however I s took care of by isolated taking care of pon. The antenns for GPS-hand I s acknowledged by utilizing a corner-shortened square-ring microstrip fix with four cuts. The external side length and internal ride length are40mm(L,)and IZmm(&) ~ p % t I d imprinted on a rubrtrale o f thickness 1. 6mm(h) and y, relative peminiviry (e, :4. 4). The center ofthe substrate is evacuated for internal rectangular d I t zone ( b x b ) of fix. Feed position for right-hand circularly energized (RHCP) wave activity is put along x-pivot. furthermore, the separation of the test feed away fram the fix place I s indicated as 6 . 6 m (/) . The four-rlitr at the comers are of equivalent length I3. 5mm(S)and width Imm(w). Fig 2(a) shows mimicked reNm loss of the proposed anlenna for GPS getting recieving wire with different d I t lengths(S). It I s noticed that the reSonant recurrence quickly brought down with increasingdesign parameter(S). In f h I ~ way, the energized surface current ways are stretched in the propo~ed structures, and the working recurrence is incredibly brought down. 0-7803-8302-8/04/$20. 00 IEEE 3529 02004 Also, the shorted wander line fix recieving wire with low-profile barrel shaped monopole top is stacked at the focal point of square ring patch for K-PCS activity. For brbadband trademark, barrel shaped monopole has an enormous width of 6. 2mm(d,) and l e n ~ h 10. 7mm(h2). The eander line fix has a ride lengh Z l m ( p ) and is associated with the shared conviction by two same shorting luxurious, which have a distance across of 2. 2mm(d2). By fluctuating ofthe shorting ports diameter(d2), great impedance coordinating can without much of a stretch be acquired. Figure 2(b) shows reenacted retum misfortune for the p r a p ~ e d K-PCS recieving wire with different cut lengthr(m,) of wander line fix. Wa nder line fix size can be diminished by expanding embedded cut length. On account of the reception apparatus for K-PCS activity meddle the hub mtio of GPS accepting radio wire, the miniatufimion of GPS recieving wire is restricted. As indicated by the examination, the fix size of GPS reception apparatus for round captivated activity must he over about double the size of KPCS radio wire with wander line suunurc. In the proposed plans, the transfer speed of3-dB pivotal mtio is around 13 MHz, which is a lot bigger than that required for GPS activity at 1575 MHz. The deliberate hub proportion ofthe reception apparatus for GPS activity I s introduced in Figure 3. Figure 4 shows estimated re† 101 of proposed recieving wire. The impedance transfer speeds (. lOdB retum larr) are about lZOMH~(1744MHr-1864MH~)far K-PCS band and 60MHr (IS46MHr-1606MHz) for GPS-band. The separation between the two taking care of pons of the PCS and GPS elemenls is not exactly - 17dB. Estimated radiation panems of the proposed radio wire at l8OOMHz and ISROMHz are introduced in Figure 5 and 6, individually. The K-PCS radio wire radiation panem at IROOMHz shows a monopole radiation panem, 10 this fype of reception apparatus is appropriate for applications on a vehicular correspondence framework. For the GPS anfenna at ISROMHz, great broadside band radiation panem is acquired. Far K-PCS activity the deliberate pea* recieving wire gains is around 2. 4dBi and t h c gain varieties are inside O. JdBi, for GPS activity the deliberate pinnacle reception apparatus gains is around 7. dBi and the vanations of addition doesn't exist. Decision Proposed recieving wire has a coordinated slmcturc of microitrip fix reception apparatus with two feeds for double band oprmtion(GPSiK-PCS). A position of safety round and hollow monopole with a shorted wander line fix I s stacked for K- PCS activity, which rhowr a straightly enraptured monopole patkm with broadband characterirlic. The transmitting forebearing for GPS activity is a novel square-ring microstip way with shortened comers with four cuts, which give circularly spellbound braadrids radiation panemr. size decrease of proposed reception apparatus is accomplished by utilizing cuts. Wander line fix and square ring patch with four . lib of proposed radio wire are about 70% and SO% of referenced recieving wire sire. As the proposed recieving wire has a minimal size for double band activity, it will be appropriate for handy vehicular portable correspondence radio wire applications. R&E†Ce [I] R. Kronberger, H. Lindenmcier, L. Reiter, J. Hapf, † Multi hand planar Invencd-F C r an Antenna for Mobile Phone andGPS,†2714p-Z717p,AP give. 1999 3530 [2] I. Y. Wu and K. L. Wong, â€Å"Two inlegraled stacked shorted patchantennas for DCSiGPS operations,† Micra wave Opt. Techno1 . Len. , Vol. 30. July, 2001. I31 S. Reed, L. Desclar, C. Terref, and S. Toutain, â€Å"Patch Antenna Size Reduction By Means Oflnductive Slots,† Micro wave Opt. Teehnol. Len. ,Vol29. Apri, 2001. 1 [41 J. Y. Wu and K. L. Wong, â€Å"Single-feed Square-ring Microstip Antenna wilh lruncated comers for Compact ~ircularpolarization Operation,† Electronics lea. , Vol. 34, May,1998. [ 5 ] W. S. Chen, C. K. Wu, and K. L. wong. I' Novel Compact Circularly energized Square Microstrip Antennq† IEEE Trans. ,Reception apparatuses Propagat. , Vol. 49, March, 2001, L, = 40mm, L, = 12mm, S = 13. 5mm, t = 5. 74mm. IY = I n † f = 6. 6†³. p = Zlmnr, m, =ZOmm, ml =3. mm, d) = 6. 2mm, d* = 2. 2†³. d, =9. 3mm h, = 1. 6mm. h2 =10. 7mm Fib. 1. Geomelly and dimiiiimi ofthe pmpanrd a n t m I l for CPSIK-PCS activity. (a) The variety against parameter S (b) The variety againsl parmnster m, Fig. 2. Mimicked return misfortune wilh v~riour ImgthsiS) nnd vsriour cut lengthsim,). cut 3531 I E 4 , d B ! - 2 1 . 560 1. 565 1. 570 1. 575 1. 580 .† - 15 FrequanollGHz , I . 1. 5 2. 0 ~r4†³enwffi~ 2. 5 Fig. 3. The deliberate dry proportion. Fig 1 Measured r t b m loss of radio wire. . (a) x-2 plane @) x-Y plane Fig 6. Estimated radiation panem for GPS activity; f=1580MHz 3532