Design and testing of coupling feed linear polarization microstrip antennas

The narrow bandwidth of a microstrip antenna is one of the important antennas wide usage In this paper, the design method coupling feed a bandwidth of 10GHz narrowband-ARMSA linearly polarized antenna. When the center frequency of 4.3GHz, the antenna design software simulation and actual test. The simulation results and the actual results are compared to the voltage standing wave ratio below 2, the measured results are consistent with the theory. Found microstrip antenna gain between −1dB–0dB, slightly less than the simulation results. The simulation and test results show that antenna has a good low elevation gain and linear polarization features to meet the needs of practical application.

I. Introduction

Microstrip antennas [1]–[3] are connected to the antenna conductor with the dielectric substrate affixed floor plus conductor foil formed. They use a microstrip line, coaxial feeders and other feed, between the patch conductor and the ground floor excite radio frequency electromagnetic fields. They radiate outward through the gap between the floor and the ground patch of four weeks. Because of low profile, small size, light weight, easy to conformal and volume [4], [5], etc., they are widely used in aircraft and ground portable devices. There are three main basic theoretical analysis of microstrip antenna: transmission line model theory, cavity model theory and full-wave theory. Cavity model theory [6], [7] developed earlier. Advantages of the cavity model theory is that researchers can work on microstrip antennas have a deeper understanding of physics, can promote many new designs and applications microstrip antenna. In this paper, we study on the cavity model theory realization of microstrip antennas.