Design of an 868 MHz Printed S-Shape Monopole Antenna

Abstract

The purpose of this work is to design and analyze an s-shaped printed circuit board (PCB) monopole antenna. The antenna was analyzed to operate at a resonance frequency band of 868 MHz; acceptable in 915 MHz as well. The s-shape is selected due to the need of reducing the overall size of the normal monopole antenna. The printed antenna was designed with an approximate overall size of 39 × 56 mm 2 of which the antenna's upper side is 26 × 39 mm 2 while its reference ground board was sized at 39 × 30 mm 2. The antenna is fed by a strip line of 3 × 1.5 mm 2 , in series with a 4.4 pF capacitance and shunt with an 8.7 nH inductance for purpose of antenna's impedance matching with the input. A couple of existing publications showed that PCB antenna is not a new technology; however not an old technology for telecommunication industry. The raised problem by this work was duly solved with HFSS as a tool; excellent results are presented. After duly matching the antenna's impedance with 50 Ω microstrip feed-line, solutions for overall performance were analyzed and demonstrated optimal: radiation patterns were proven omnidirectional, antenna gain optimized. The present antenna prototype's overall dimensions can be readjusted according to any industrial and manufacturing requests.

Design and Realization of a Dual Wide Band Printed Monopole Antenna for WiFi and WiMAX Systems

“…A couple of monopole antennas were surveyed such as inverted F [17] [18], inverted L [19] [20] and snakelike [21].…”

Novel monopole antenna on a single AMC cell for low SAR

“…4. According to [27], calculation of the effective permittivity for a quarter wavelength monopole is approximated by: where h is the thickness of the substrate; W a is the trace width.

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“…4. According to [27], calculation of the effective permittivity for a quarter wavelength monopole is approximated by:…”