Design of a Triple Layer Microstrip Patch Antenna

Abstract

This paper presents a probe fed patch antenna. The proposed antenna has VSWR  2 for frequency band 0.1 GHz to 9.6GHz. Investigations on the impedance and radiation characteristics have also been carried out. The investigations show that the proposed antenna not only offers the enhance impedance bandwidth but also possess the same characteristics over desired frequency band. In this paper probe fed microstrip antenna is presented. The objective of the proposed design is to improve the impedance bandwidth. Simulation of the proposed antenna has been carried out using IE3D software (15) and its various characteristics have been investigated. ANTENNA DESIGN The proposed configuration of the antenna is shown in figure 1 The proposed design consist of three layers in which one circular patch of radius 2mm is placed in layer 1, A square patch of 4×4 mmE is placed in layer 2 and 3. Layer 3 is circular patch with radius 1mm, as of layer 1 is positioned and there is dielectric of r =1 of thickness 0.5mm in between of each layer. To excite the patch of the first layer, a dual probe feed is applied to the patch at layer 1. Two substrates of different dielectric constants are used. The substrates are of thickness 1 mm as layer 1, 1mm as layer 2 and 1.5mm as layer 3 from the ground plane. The dielectric constant between layer 1 and 2 is 1 and between layer 2 and 3 is also 1