CPW‐fed low‐profile directional antenna operating in low microwave band for wideband medical diagnostic systems. Issue 4 (1st February 2014)

• Record Type: Journal Article
• Authors: Mobashsher, A.T.; Abbosh, A.
• Is Part Of: Electronics letters. Volume 50:Issue 4(2014)
• Page Start: 246
• Page End: 248
• Publication Date: 2014-02-01
• Subjects: antenna radiation patterns -- broadband antennas -- coplanar waveguides -- directive antennas -- geometry; CPW‐fed low‐profile directional antenna -- low microwave band -- wideband medical diagnostic systems -- wideband antennas -- directive radiation patterns -- light weight antennas -- microwave‐based diagnostic systems -- loop‐like geometry -- coplanar waveguide -- folded‐dipole -- stable radiation patterns -- wideband medical imaging systems; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.3909
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Medical diagnostic systems demand wideband antennas with directive radiation patterns. In addition, portable systems require low profile and light weight antennas to be incorporated. These necessities of modern microwave‐based diagnostic systems are addressed in this reported work. The antenna is built with two simple thoroughly printed structures connected to each other using two copper walls, forming a loop‐like geometry. The top element is capacitively loaded with a pair of symmetrically placed slots and fed with a coplanar waveguide (CPW). The antenna works like a small loop in the lower resonating mode and as a folded‐dipole in the higher modes. The antenna exhibits a 109% bandwidth with stable radiation patterns of an about 9 dB front‐to‐back ratio over most of the band with only a profile of 0.05 λ ( λ = wavelength at the lowest frequency). The measured and the simulated results show that the proposed antenna is suitable for wideband medical imaging systems.