Printed planar circular radiating patch ultra wideband antennas (original) (raw)
2014, Microsystem Technologies
systems. The Federal Communications Commission (FCC) has designated the 3.1-10.6 GHz band with Effective Isotropic Radiated Power (EIRP) below −40 dbm/kHz for UWB Communications. Some UWB antennas are much more complex than other existing single band, dual band and multi-band antennas (Allen et al. 2007; Pozar 2005). Most of the UWB monopole antennas are investigated till today is non-planar as in Pillalamarri and Kshetrimayum (2007a) and Kshetrimayum and Pillalamarri (2009) and due to its protruded structure they cannot be integrated with integrated circuits and they are fragile. Few researchers have also studied printed monopole antennas. In this paper, we will investigate circular disc UWB antenna, which is basically a printed microstrip antenna with etched ground plane (Kshetrimayum and Pillalamarri 2009; Pillalamarri and Kshetrimayum 2007b, c). First we will investigate in depth the circular disk printed monopole antenna with etched ground plane as shown Fig. 1a for UWB applications. We have used conventional rectangular microstrip lines as feed lines for printed UWB antennas which are properly matched to the antenna impedance (Liang et al. 2004; Agrawall et al. 1998; Hammoud et al. 1993). In future we will also investigate other broadband matching techniques to further improve the UWB performance of the printed monopole antenna. 2 Geometry of the printed planar circular radiating patch UWB antenna The UWB antenna is designed on a substrate with 4.4 relative permittivity and 1.6 mm thickness and simple microstrip line is used for feeding. Real part of antenna impedance is exactly 50 Ω at 3 GHz, and 7.9 GHz where the Abstract In this paper we have investigated printed circular disc monopole antenna, which is basically printed microstrip antenna with etched ground plane for ultrawideband (UWB) applications. In particular we have simulated circular disc monopole antenna with etched ground plane. Simple rectangular microstrip line is used for feeding the printed monopole antenna and which is having impedance of 50 Ω. This designed circular disc UWB monopole antenna works well for the whole UWB frequency band 3.1-10.6 GHz.
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