Wide-band slot antennas with CPW feed lines: hybrid and log-periodic designs

• Published in: IEEE transactions on antennas and propagation Vol. 52; no. 10; pp. 2545 - 2554
• Main Authors: Bhobe, A.U., Holloway, C.L., Piket-May, M., Hall, R.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna feeds; Antenna measurements; Antennas; Applied sciences; Bandwidth; Broadband antennas; Coplanar waveguides; Dielectric measurements; Exact sciences and technology; Impedance; Microstrip antennas; Microwave devices; Microwaves; Radiocommunications; Receiving; Slot antennas; Telecommunications; Telecommunications and information theory; Wideband; slot antennas; wide-band antennas; Impedance matching; Wide band; Coplanar waveguide (CPW)-fed; Slot antenna; Moment method; Antenna feeds; Coplanar waveguides; Antenna radiation patterns
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2004.834425

In microwave and millimeter wave applications, slot antennas fed by coplanar waveguide (CPW) lines are receiving increasing attention. These antennas have several useful properties, such as a wider impedance bandwidth compared to microstrip patch antennas, and easier integration of solid-state active devices. In this paper novel CPW-fed wideband slot antennas are presented. The design procedure of CPW-fed hybrid slot antennas (HSA) having impedance bandwidths (VSWR<2) up to 57% is described. Theoretical and measured results are shown. We also describe the design procedure of a CPW-fed log-periodic slot antenna (LPSA). The impedance matching and the radiation characteristics of these structures were studied using a method of moment technique. Simulated and measured results for different dielectrics are presented.