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Al Nomay, A design of a circular Microstrip patch antenna for Bluetooth and hiperlan applications, The 9th Asia-Pasific conference on Communications, Malaysia, apcc 2003.
An array of 6X6 elements patch antenna is used in this design, which increased the gain considerably for the desired operation.
At toll collection stations on the highway, the automatic toll collection will collect the money using one sensing antenna and the signal processing unit with the help of computer interfacing.It hotpoint gas stove owner's manual can be used to calculate and plot the S parameters, vswr, current distributions as well as the radiation patterns.The antenna input impedances that obtained at these frequencies are approximately pure resistive.The obtained results are compared with the available published data and Good agreements are found.She did her.Tech From CR Reddy Engineering college and.Tech from Balaji institute of technology.Siva Priya Mala,.Figure 2 shows the return loss of the circular patch antenna.According to situation, it controls the center manager system do different operation.It has been only very recent in human history that the electromagnetic spectrum, outside the visible region, has been employed for communication, through the use.For perfectly impedance matched antenna the vswr is 1:1.Step 2- The effective area of the patch is then given.The return loss, input impedance, and the vswr of the antenna are obtained which are shown below in tabular form.Name eturn Loss Patch_Antenna_ADKv1 ansoft m.8945 -18.4375 Curve Info dB(St(1,1) -2.50 Setup1 : Sw eep1 -5.00 -7.50 dB(S t(1,1) -10.00 -12.50 -15.00 -17.50 m 1 -20.00.00.00.00.00.00.00.00 Freq GHz Figure 2Return lossVs Frequency Fig.Automatic vehicle identification tags can be further broken down into distinct tag types based on the degree to which they can be programmed and the type of power source 5-8.The return loss, input impedance, and the vswr are calculated.10 ml biographies.
The substrate has a dielectric constant.4, loss tangent.02, and thickness of substrate.8.
Electronic Label in Toll Collection.The system of automatic identification vehicle is composed by on board unit, road side unit, loop sensor and other components.Ray, Broadband Microstrip antennas, Artech House, INC, 2003.The circular patch antenna is design based on cavity model to obtain the best output in term of return loss and vswr.Communication between humans was first by sound through voice.Under the condition that the return loss to be less than -10dB, the return loss and bandwidth.4 GHz is -49.01dB and.62 respectively.Electronic toll collection dharani1,.Furthermore, the radiation performance of the entire array is evaluated by the array factor technique and the array factor is calculated from the scattering parameters of our equivalent circuit network.This impedance mismatch will reduce system efficiency.
Keywords: Parallel Feeding, Electronic Toll Collection (ETC Microstrip Patch Array.