Frequency estimation for compact microstrip antennas

Abstract

A simple method is presented for estimating the resonant frequency of compact slotted microstrip antennas, based on their current distribution. The method has been first tested in two basic and symmetric geometries; afterwards, through the combination of these geometries, a multi-slotted structure has been analysed. Prototypes have also been manufactured in RT/Duroid 6002 and FR4 substrates, and good agreement has been obtained between estimations, simulations and measurements. A maximum estimation error of 10% has been achieved with this method, providing a useful tool for the design of compact slotted microstrip antennas.

A study on frequency tuning and miniaturization of a ground slotted rectangular microstrip patch antenna built with different dielectric substrates

“…For the past years, dual-polarized technology has been extensively utilized to increase communication capability and reduce the effects of multipath fading. Many broadband dual-polarized antennas have been presented for base station applications [1][2][3][4][5][6][7][8][9][10][11]. By using the aperture-coupled [1] and L-probe feeding technology [2], antennas [1,2] realized the impedance bandwidth of 17% (SWR < 2) and 19.8% (SWR < 1.5).…”

“…By adding parasitic elements [6][7][8][9], a improved broadband impedance bandwidth can be obtained. A new type of magnetoelectric dipole antenna for base stations was presented [10], which achieved wide impedance bandwidth, stable radiation pattern, stable gain and low cross polarization.…”

“…In this letter, a simple differential enhanced broadband dualpolarized antenna excited directly by coaxial cables is presented. It achieves a wide bandwidth range from 1.65 to 3.33 GHz covering 2G/3G/LTE bands, which is wider than [6][7][8][9][10][11]…”

“…The recent design of multiband antennas are also focused on frequency reconfigurable or frequency tunable antennas . The resonant frequency estimation for a compact microstrip antenna is presented in . However the maximum estimated error was about 10% which is not very less to avoid.…”