Compact Coplanar Antenna Research Articles

Design a Compact Coplanar Wideband Antenna Used in Radio Frequency Identification Systems

In this paper, a new compact coplanar antenna used for Radio frequency identification (FID) applications is presented. This antenna is operated at the resonant frequency of 2.45 GHz. The proposed antenna is designed on an epoxy substrate material type (FR-4) with small size of (40 × 28) mm2 in which the dielectric thickness (ℎ) of 1.6 mm, relative permittivity (er) of 4.3 and tangent loss of 0.025. In this design the return loss is less than −10 dB in the frequency interval (2.12 − 2.84) GHz and the minimum value of return loss is -32 dB at resonant frequency. The maximum gain of the proposed antenna is 1.22 dB and the maximum directivity obtained is 2.27 dB. The patch and the ground plane of the proposed antenna are in the same surface. The proposed antenna has a wide bandwidth and omnidirectional radiation pattern with small size. The overall size of the compact antenna is (40 × 28 × 1.635) mm3. The Computer Simulation Technology (CST) microwave studio software is used for simulation and gets layout design.

A Circuit Model to an Encoche Coplanar Antenna for an RFID TAG

In this paper, Miniature Encoche Coplanar antennas are proposed. To validate our structure and to develop an analytic method to determine the geometry parameters, the Lumped theory is used. The proposed structure is simulated using ADS and then Compared to the electrical Model. The proposed circuit has the same resonant aspect when comparing to the Encoche antenna with a much reduced simulation time. The compact coplanar antenna has a box with a size of 36*52*0.2 mm3. This antenna will be designed to an RFID TAG that resonates on 2.45 GHz. DOI: http://dx.doi.org/10.11591/ijece.v3i3.2579

Design of a Compact CPW Antenna using MTM-MEMS

This article presents the design of a novel and compact coplanar antenna using metamaterials (MTM) and MEMS. The antenna is based on coplanar waveguide (CPW) technology; therefore, the signal and ground are in the same plane, presenting lower dielectric losses and high signal integrity. The designed antenna can be tuned in the frequency range from 5.3 to 5.8 GHz by MEMS capacitors for wireless communications systems. The design method for these MTM-MEMS antennas, herein presented, is based on a composite right/left handed transmission line using a mixed approach, considering the circuit model and full-wave simulations. The physical size of the antenna is 1/10*lambda where lambda is the free space wavelength.