Compact Simple Planar Millimeter- Wave Antenna for Unlicensed 57–64 GHz Band Applications

A compact millimeter-wave (mm-wave) microstrip antenna with a simple construction is presented in this paper. A defected ground plane with a rectangular radiating patch fed by a microstrip-line is manipulated to operate in the unlicensed V-band. A circular aperture in the ground plane is utilized to enhance the impedance bandwidth up to 15.12% ranges from 55 to 64 GHz to be suitable for industrial, scientific and medical (ISM) broadband applications. The proposed antenna parameters are analyzed extensively in order to achieve optimal operation in the desired frequency band. The proposed antenna is fabricated and tested. The experimental data of the fabricated prototype in terms of the reflection coefficient, show good agreement with the simulated results. The proposed design shows good radiation characteristics of average gain 6.5 dBi over the entire operating band. These features make the proposed antenna suitable candidate for mm-wave applications.