Design of a printed circuit board antenna for multiple utilizations in IEEE802.16a spectrum and beyond

Abstract

The design of a microstrip monopole antenna with extra ultra-wide band performance, small size and enhanced radiation gain is presented. For sake of progress research in modern antennas, looking at the current research trend in broadband (BB), wideband (WB), ultra-wide band (UWB) antennas as well as their role to the emerging nanotechnology of electronics engineering, the motivation is to furthermore improve on these antennas performance characteristics. The trend in designing modern antennas is how to constrain antennas into miniature portable devices and maintain the bandwidth and gain requirements. Dual-band and multi-band antennas are still acceptable as modern antennas but compact WB and UWB antennas are highly wanted. The presented final antenna structure ensemble is described as an L-shaped radiator soldered with a meander line and an inverted u-shaped parasitic radiator on its furthest top, all fed by the rectangular microstrip line in bottom middle. A shorting pin doesn't only solve Electromagnetic Interference (EMI) effects; it also makes the antenna bandwidth more qualitative. The parasitic radiator further fine-tunes the BW and radiation power gain. The final design qualifies for multiple utilizations antenna in the useful UWB frequency sweep from (2.75 ∼ 31.3) GHz, absolute bandwidth (BW) of 28.55 GHz and fractional BW of 178.4%. Thinking about the role of electromagnetic (EM) wave filtering in UWB systems, unwanted band rejection filtering is recommended at the transmitter/receiver circuits level so that a couple of systems would enjoy radiation performance of the proposed antenna. Those utilizations are for instance airport search radar, satellite down/up communication systems, and others discussed at the end section. The antenna's overall performance results are demonstrated optimal, most important are the lower frequency radiation performance in (3 ∼ 16) GHz frequency spectrum. Reference made from a good number of previous designs, simulation experiments that repeatedly yielded the same results on different computers would give out manufacturing test results that perfectly prove simulation.